v2.6.0

Ref: https://github.com/go-task/homebrew-tap/pull/1

Thanks @dawidd6

.editorconfig

@@ -9,6 +9,6 @@ trim_trailing_whitespace = true
 indent_style = tab
 indent_size = 8
 
-[*.{md,yml,yaml,json,toml}]
+[*.{md,yml,yaml,json,toml,htm,html}]
 indent_style = space
 indent_size = 2

.github/CONTRIBUTING.md

@@ -1,12 +1,6 @@
 * Bug reports and feature requests are welcome in [the issues][issues]
-* For questions and discussion there's the [Slack room][slack] ([invititation here][slackinvite])
 * Pull Requests are welcome. For more complex changes and features it's
-  recommended to open an issue first
-* About 3 or 4 pull requests accepted one gets write access to the repo.
-  Even then, possible backward incompatible changes should be discussed first
-  in an issue or pull request
+  recommended to open an issue with the feature request first
 * Documentation contributions are as important as code contributions
 
 [issues]: https://github.com/go-task/task/issues
-[slack]: https://gophers.slack.com/messages/task
-[slackinvite]: https://invite.slack.golangbridge.org/

.github/FUNDING.yml

@@ -0,0 +1 @@
+open_collective: task

.github/ISSUE_TEMPLATE.md

@@ -1,7 +1,4 @@
 <!--
-For questions and general talk there's the Slack room: https://gophers.slack.com/messages/task
-Invite to the Slack is available in this link: https://invite.slack.golangbridge.org/
-
 If relevant, include the following information:
 - Task version
 - OS

.gitignore

@@ -14,6 +14,13 @@
 .glide/
 
 ./task
+.task
 dist/
 
-vendor/**/*_test.go
+.DS_Store
+
+# intellij idea/goland
+.idea/
+
+# exuberant ctags
+tags

.goreleaser.yml

@@ -11,6 +11,8 @@ build:
   ignore:
     - goos: darwin
       goarch: 386
+  env:
+    - CGO_ENABLED=0
 
 archive:
   name_template: "{{.Binary}}_{{.Os}}_{{.Arch}}"
@@ -22,12 +24,21 @@ archive:
 release:
   draft: true
 
-fpm:
+snapshot:
+  name_template: "{{.Tag}}"
+
+checksum:
+  name_template: "task_checksums.txt"
+
+nfpm:
   vendor: Task
   homepage: https://github.com/go-task/task
   maintainer: Andrey Nering <andrey.nering@gmail.com>
   description: Simple task runner written in Go
   license: MIT
+  conflicts:
+    - taskwarrior
   formats:
     - deb
     - rpm
+  name_template: "{{.ProjectName}}_{{.Os}}_{{.Arch}}"

.travis.yml

@@ -1,9 +1,22 @@
 language: go
+
 go:
-  - 1.8
-  - 1.9
+  - 1.11.x
+  - 1.12.x
+
+addons:
+  apt:
+    packages:
+      - rpm
+
 script:
   - go install github.com/go-task/task/cmd/task
-  - task dl-deps
-  - task lint
-  - task test
+  - task ci
+
+deploy:
+  - provider: script
+    skip_cleanup: true
+    script: curl -sL http://git.io/goreleaser | bash
+    on:
+      tags: true
+      condition: $TRAVIS_OS_NAME = linux

CHANGELOG.md

@@ -0,0 +1,204 @@
+# Changelog
+
+## Unreleased
+
+- Fixed some bugs regarding minor version checks on `version:`.
+- Add `preconditions:` to task
+  ([#205](https://github.com/go-task/task/pull/205)).
+- Create directory informed on `dir:` if it doesn't exist
+  ([#209](https://github.com/go-task/task/issues/209), [#211](https://github.com/go-task/task/pull/211)).
+- We now have a `--taskfile` flag (alias `-t`), which can be used to run
+  another Taskfile (other than the default `Taskfile.yml`)
+  ([#221](https://github.com/go-task/task/pull/221)).
+- It's now possible to install Task using Homebrew on Linux
+  ([go-task/homebrew-tap#1](https://github.com/go-task/homebrew-tap/pull/1)).
+
+## v2.5.2 - 2019-05-11
+
+- Reverted YAML upgrade due issues with CRLF on Windows
+  ([#201](https://github.com/go-task/task/issues/201), [go-yaml/yaml#450](https://github.com/go-yaml/yaml/issues/450)).
+- Allow setting global variables through the CLI
+  ([#192](https://github.com/go-task/task/issues/192)).
+
+## 2.5.1 - 2019-04-27
+
+- Fixed some issues with interactive command line tools, where sometimes
+  the output were not being shown, and similar issues
+  ([#114](https://github.com/go-task/task/issues/114), [#190](https://github.com/go-task/task/issues/190), [#200](https://github.com/go-task/task/pull/200)).
+- Upgraded [go-yaml/yaml](https://github.com/go-yaml/yaml) from v2 to v3.
+
+## v2.5.0 - 2019-03-16
+
+- We moved from the taskfile.org domain to the new fancy taskfile.dev domain.
+  While stuff is being redirected, we strongly recommend to everyone that use
+  [this install script](https://taskfile.dev/#/installation?id=install-script)
+  to use the new taskfile.dev domain on scripts from now on.
+- Fixed to the ZSH completion
+  ([#182](https://github.com/go-task/task/pull/182)).
+- Add [`--summary` flag along with `summary:` task attribute](https://taskfile.org/#/usage?id=display-summary-of-task)
+  ([#180](https://github.com/go-task/task/pull/180)).
+
+## v2.4.0 - 2019-02-21
+
+- Allow calling a task of the root Taskfile from an included Taskfile
+  by prefixing it with `:`
+  ([#161](https://github.com/go-task/task/issues/161), [#172](https://github.com/go-task/task/issues/172)),
+- Add flag to override the `output` option
+  ([#173](https://github.com/go-task/task/pull/173));
+- Fix bug where Task was persisting the new checksum on the disk when the Dry
+  Mode is enabled
+  ([#166](https://github.com/go-task/task/issues/166));
+- Fix file timestamp issue when the file name has spaces
+  ([#176](https://github.com/go-task/task/issues/176));
+- Mitigating path expanding issues on Windows
+  ([#170](https://github.com/go-task/task/pull/170)).
+
+## v2.3.0 - 2019-01-02
+
+- On Windows, Task can now be installed using [Scoop](https://scoop.sh/)
+  ([#152](https://github.com/go-task/task/pull/152));
+- Fixed issue with file/directory globing
+  ([#153](https://github.com/go-task/task/issues/153));
+- Added ability to globally set environment variables
+  (
+    [#138](https://github.com/go-task/task/pull/138),
+    [#159](https://github.com/go-task/task/pull/159)
+  ).
+
+## v2.2.1 - 2018-12-09
+
+- This repository now uses Go Modules (#143). We'll still keep the `vendor` directory in sync for some time, though;
+- Fixing a bug when the Taskfile has no tasks but includes another Taskfile (#150);
+- Fix a bug when calling another task or a dependency in an included Taskfile (#151).
+
+## v2.2.0 - 2018-10-25
+
+- Added support for [including other Taskfiles](https://taskfile.org/#/usage?id=including-other-taskfiles) (#98)
+  - This should be considered experimental. For now, only including local files is supported, but support for including remote Taskfiles is being discussed. If you have any feedback, please comment on #98.
+- Task now have a dedicated documentation site: https://taskfile.org
+  - Thanks to [Docsify](https://docsify.js.org/) for making this pretty easy. To check the source code, just take a look at the [docs](https://github.com/go-task/task/tree/master/docs) directory of this repository. Contributions to the documentation is really appreciated.
+
+## v2.1.1 - 2018-09-17
+
+- Fix suggestion to use `task --init` not being shown anymore (when a `Taskfile.yml` is not found)
+- Fix error when using checksum method and no file exists for a source glob (#131)
+- Fix signal handling when the `--watch` flag is given (#132)
+
+## v2.1.0 - 2018-08-19
+
+- Add a `ignore_error` option to task and command (#123)
+- Add a dry run mode (`--dry` flag) (#126)
+
+## v2.0.3 - 2018-06-24
+
+- Expand environment variables on "dir", "sources" and "generates" (#116)
+- Fix YAML merging syntax (#112)
+- Add ZSH completion (#111)
+- Implement new `output` option. Please check out the [documentation](https://github.com/go-task/task#output-syntax)
+
+## v2.0.2 - 2018-05-01
+
+- Fix merging of YAML anchors (#112)
+
+## v2.0.1 - 2018-03-11
+
+- Fixes panic on `task --list`
+
+## v2.0.0 - 2018-03-08
+
+Version 2.0.0 is here, with a new Taskfile format.
+
+Please, make sure to read the [Taskfile versions](https://github.com/go-task/task/blob/master/TASKFILE_VERSIONS.md) document, since it describes in depth what changed for this version.
+
+* New Taskfile version 2 (https://github.com/go-task/task/issues/77)
+* Possibility to have global variables in the `Taskfile.yml` instead of `Taskvars.yml` (https://github.com/go-task/task/issues/66)
+* Small improvements and fixes
+
+## v1.4.4 - 2017-11-19
+
+- Handle SIGINT and SIGTERM (#75);
+- List: print message with there's no task with description;
+- Expand home dir ("~" symbol) on paths (#74);
+- Add Snap as an installation method;
+- Move examples to its own repo;
+- Watch: also walk on tasks called on on "cmds", and not only on "deps";
+- Print logs to stderr instead of stdout (#68);
+- Remove deprecated `set` keyword;
+- Add checksum based status check, alternative to timestamp based.
+
+## v1.4.3 - 2017-09-07
+
+- Allow assigning variables to tasks at run time via CLI (#33)
+- Added suport for multiline variables from sh (#64)
+- Fixes env: remove square braces and evaluate shell (#62)
+- Watch: change watch library and few fixes and improvements
+- When use watching, cancel and restart long running process on file change (#59 and #60)
+
+## v1.4.2 - 2017-07-30
+
+- Flag to set directory of execution
+- Always echo command if is verbose mode
+- Add silent mode to disable echoing of commands
+- Fixes and improvements of variables (#56)
+
+## v1.4.1 - 2017-07-15
+
+- Allow use of YAML for dynamic variables instead of $ prefix
+  - `VAR: {sh: echo Hello}` instead of `VAR: $echo Hello`
+- Add `--list` (or `-l`) flag to print existing tasks
+- OS specific Taskvars file (e.g. `Taskvars_windows.yml`, `Taskvars_linux.yml`, etc)
+- Consider task up-to-date on equal timestamps (#49)
+- Allow absolute path in generates section (#48)
+- Bugfix: allow templating when calling deps (#42)
+- Fix panic for invalid task in cyclic dep detection
+- Better error output for dynamic variables in Taskvars.yml (#41)
+- Allow template evaluation in parameters
+
+## v1.4.0 - 2017-07-06
+
+- Cache dynamic variables
+- Add verbose mode (`-v` flag)
+- Support to task parameters (overriding vars) (#31) (#32)
+- Print command, also when "set:" is specified (#35)
+- Improve task command help text (#35)
+
+## v1.3.1 - 2017-06-14
+
+- Fix glob not working on commands (#28)
+- Add ExeExt template function
+- Add `--init` flag to create a new Taskfile
+- Add status option to prevent task from running (#27)
+- Allow interpolation on `generates` and `sources` attributes (#26)
+
+## v1.3.0 - 2017-04-24
+
+- Migrate from os/exec.Cmd to a native Go sh/bash interpreter
+  - This is a potentially breaking change if you use Windows.
+  - Now, `cmd` is not used anymore on Windows. Always use Bash-like syntax for your commands, even on Windows.
+- Add "ToSlash" and "FromSlash" to template functions
+- Use functions defined on github.com/Masterminds/sprig
+- Do not redirect stdin while running variables commands
+- Using `context` and `errgroup` packages (this will make other tasks to be cancelled, if one returned an error)
+
+## v1.2.0 - 2017-04-02
+
+- More tests and Travis integration
+- Watch a task (experimental)
+- Possibility to call another task
+- Fix "=" not being reconized in variables/environment variables
+- Tasks can now have a description, and help will print them (#10)
+- Task dependencies now run concurrently
+- Support for a default task (#16)
+
+## v1.1.0 - 2017-03-08
+
+- Support for YAML, TOML and JSON (#1)
+- Support running command in another directory (#4)
+- `--force` or `-f` flag to force execution of task even when it's up-to-date
+- Detection of cyclic dependencies (#5)
+- Support for variables (#6, #9, #14)
+- Operation System specific commands and variables (#13)
+
+## v1.0.0 - 2017-02-28
+
+- Add LICENSE file

Gopkg.lock

@@ -1,123 +0,0 @@
-# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'.
-
-
-[[projects]]
-  name = "github.com/Masterminds/semver"
-  packages = ["."]
-  revision = "15d8430ab86497c5c0da827b748823945e1cf1e1"
-  version = "v1.4.0"
-
-[[projects]]
-  branch = "master"
-  name = "github.com/Masterminds/sprig"
-  packages = ["."]
-  revision = "82f6f19d47b416d27ae039939b44afaa0575860e"
-
-[[projects]]
-  name = "github.com/aokoli/goutils"
-  packages = ["."]
-  revision = "3391d3790d23d03408670993e957e8f408993c34"
-  version = "v1.0.1"
-
-[[projects]]
-  name = "github.com/davecgh/go-spew"
-  packages = ["spew"]
-  revision = "346938d642f2ec3594ed81d874461961cd0faa76"
-  version = "v1.1.0"
-
-[[projects]]
-  branch = "master"
-  name = "github.com/huandu/xstrings"
-  packages = ["."]
-  revision = "d6590c0c31d16526217fa60fbd2067f7afcd78c5"
-
-[[projects]]
-  name = "github.com/imdario/mergo"
-  packages = ["."]
-  revision = "7fe0c75c13abdee74b09fcacef5ea1c6bba6a874"
-  version = "0.2.4"
-
-[[projects]]
-  branch = "master"
-  name = "github.com/mattn/go-zglob"
-  packages = [".","fastwalk"]
-  revision = "4b74c24375b3b1ee226867156e01996f4e19a8d6"
-
-[[projects]]
-  branch = "master"
-  name = "github.com/mitchellh/go-homedir"
-  packages = ["."]
-  revision = "b8bc1bf767474819792c23f32d8286a45736f1c6"
-
-[[projects]]
-  name = "github.com/pmezard/go-difflib"
-  packages = ["difflib"]
-  revision = "792786c7400a136282c1664665ae0a8db921c6c2"
-  version = "v1.0.0"
-
-[[projects]]
-  name = "github.com/radovskyb/watcher"
-  packages = ["."]
-  revision = "6145e1439b9de93806925353403f91d2abbad8a5"
-  version = "v1.0.2"
-
-[[projects]]
-  name = "github.com/satori/go.uuid"
-  packages = ["."]
-  revision = "879c5887cd475cd7864858769793b2ceb0d44feb"
-  version = "v1.1.0"
-
-[[projects]]
-  branch = "master"
-  name = "github.com/spf13/pflag"
-  packages = ["."]
-  revision = "4c012f6dcd9546820e378d0bdda4d8fc772cdfea"
-
-[[projects]]
-  name = "github.com/stretchr/testify"
-  packages = ["assert"]
-  revision = "69483b4bd14f5845b5a1e55bca19e954e827f1d0"
-  version = "v1.1.4"
-
-[[projects]]
-  branch = "master"
-  name = "golang.org/x/crypto"
-  packages = ["pbkdf2","scrypt","ssh/terminal"]
-  revision = "9f005a07e0d31d45e6656d241bb5c0f2efd4bc94"
-
-[[projects]]
-  branch = "master"
-  name = "golang.org/x/net"
-  packages = ["context"]
-  revision = "9dfe39835686865bff950a07b394c12a98ddc811"
-
-[[projects]]
-  branch = "master"
-  name = "golang.org/x/sync"
-  packages = ["errgroup"]
-  revision = "fd80eb99c8f653c847d294a001bdf2a3a6f768f5"
-
-[[projects]]
-  branch = "master"
-  name = "golang.org/x/sys"
-  packages = ["unix","windows"]
-  revision = "0ac51a24ef1c37380f98ba8b98f56e3bffd59850"
-
-[[projects]]
-  branch = "v2"
-  name = "gopkg.in/yaml.v2"
-  packages = ["."]
-  revision = "287cf08546ab5e7e37d55a84f7ed3fd1db036de5"
-
-[[projects]]
-  branch = "master"
-  name = "mvdan.cc/sh"
-  packages = ["interp","syntax"]
-  revision = "5758e57655f2f2242603195aaaad08d1cb9f8f85"
-
-[solve-meta]
-  analyzer-name = "dep"
-  analyzer-version = 1
-  inputs-digest = "da52cb2c602c1362c303cf241aa18dfd6199f30484bb12684adb0b6927391cbf"
-  solver-name = "gps-cdcl"
-  solver-version = 1

Gopkg.toml

@@ -1,103 +0,0 @@
-
-## Gopkg.toml example (these lines may be deleted)
-
-## "metadata" defines metadata about the project that could be used by other independent
-## systems. The metadata defined here will be ignored by dep.
-# [metadata]
-# key1 = "value that convey data to other systems"
-# system1-data = "value that is used by a system"
-# system2-data = "value that is used by another system"
-
-## "required" lists a set of packages (not projects) that must be included in
-## Gopkg.lock. This list is merged with the set of packages imported by the current
-## project. Use it when your project needs a package it doesn't explicitly import -
-## including "main" packages.
-# required = ["github.com/user/thing/cmd/thing"]
-
-## "ignored" lists a set of packages (not projects) that are ignored when
-## dep statically analyzes source code. Ignored packages can be in this project,
-## or in a dependency.
-# ignored = ["github.com/user/project/badpkg"]
-
-## Constraints are rules for how directly imported projects
-## may be incorporated into the depgraph. They are respected by
-## dep whether coming from the Gopkg.toml of the current project or a dependency.
-# [[constraint]]
-## Required: the root import path of the project being constrained.
-# name = "github.com/user/project"
-#
-## Recommended: the version constraint to enforce for the project.
-## Only one of "branch", "version" or "revision" can be specified.
-# version = "1.0.0"
-# branch = "master"
-# revision = "abc123"
-#
-## Optional: an alternate location (URL or import path) for the project's source.
-# source = "https://github.com/myfork/package.git"
-#
-## "metadata" defines metadata about the dependency or override that could be used
-## by other independent systems. The metadata defined here will be ignored by dep.
-# [metadata]
-# key1 = "value that convey data to other systems"
-# system1-data = "value that is used by a system"
-# system2-data = "value that is used by another system"
-
-## Overrides have the same structure as [[constraint]], but supersede all
-## [[constraint]] declarations from all projects. Only [[override]] from
-## the current project's are applied.
-##
-## Overrides are a sledgehammer. Use them only as a last resort.
-# [[override]]
-## Required: the root import path of the project being constrained.
-# name = "github.com/user/project"
-#
-## Optional: specifying a version constraint override will cause all other
-## constraints on this project to be ignored; only the overridden constraint
-## need be satisfied.
-## Again, only one of "branch", "version" or "revision" can be specified.
-# version = "1.0.0"
-# branch = "master"
-# revision = "abc123"
-#
-## Optional: specifying an alternate source location as an override will
-## enforce that the alternate location is used for that project, regardless of
-## what source location any dependent projects specify.
-# source = "https://github.com/myfork/package.git"
-
-
-
-[[constraint]]
-  branch = "master"
-  name = "github.com/Masterminds/sprig"
-
-[[constraint]]
-  branch = "master"
-  name = "github.com/imdario/mergo"
-
-[[constraint]]
-  branch = "master"
-  name = "github.com/mattn/go-zglob"
-
-[[constraint]]
-  branch = "master"
-  name = "mvdan.cc/sh"
-
-[[constraint]]
-  branch = "master"
-  name = "github.com/spf13/pflag"
-
-[[constraint]]
-  branch = "master"
-  name = "golang.org/x/sync"
-
-[[constraint]]
-  branch = "v2"
-  name = "gopkg.in/yaml.v2"
-
-[[constraint]]
-  branch = "master"
-  name = "github.com/radovskyb/watcher"
-
-[[constraint]]
-  branch = "master"
-  name = "github.com/mitchellh/go-homedir"

README.md

@@ -1,568 +1,22 @@
-[![Join Slack room](https://img.shields.io/badge/%23task-chat%20room-blue.svg)](https://gophers.slack.com/messages/task)
 [![Build Status](https://travis-ci.org/go-task/task.svg?branch=master)](https://travis-ci.org/go-task/task)
 
-# Task - A task runner / simpler Make alternative written in Go
+# Task
 
-Task is a simple tool that allows you to easily run development and build
-tasks. Task is written in Golang, but can be used to develop any language.
-It aims to be simpler and easier to use then [GNU Make][make].
+Task is a task runner / build tool that aims to be simpler and easier to use
+than, for example, [GNU Make](https://www.gnu.org/software/make/).
 
-- [Installation](#installation)
-  - [Go](#go)
-  - [Snap](#snap)
-  - [Binary](#binary)
-- [Usage](#usage)
-  - [Environment](#environment)
-  - [OS specific task](#os-specific-task)
-  - [Task directory](#task-directory)
-  - [Task dependencies](#task-dependencies)
-  - [Calling another task](#calling-another-task)
-  - [Prevent unnecessary work](#prevent-unnecessary-work)
-  - [Variables](#variables)
-    - [Dynamic variables](#dynamic-variables)
-  - [Go's template engine](#gos-template-engine)
-  - [Help](#help)
-  - [Silent mode](#silent-mode)
-  - [Watch tasks](#watch-tasks-experimental)
-- [Examples](#examples)
-- [Task in the wild](#task-in-the-wild)
-- [Alternative task runners](#alternative-task-runners)
+See [taskfile.dev](https://taskfile.dev) for documentation.
 
-## Installation
+---
 
-### Go
+## Sponsors
 
-If you have a [Golang][golang] environment setup, you can simply run:
+[![Sponsors](https://opencollective.com/task/sponsors.svg?width=890)](https://opencollective.com/task)
 
-```bash
-go get -u -v github.com/go-task/task/cmd/task
-```
+## Backers
 
-### Snap
+[![Backers](https://opencollective.com/task/backers.svg?width=890)](https://opencollective.com/task)
 
-Task is available for [Snapcraft][snapcraft], but keep in mind that your
-Linux distribution should allow classic confinement for Snaps to Task work
-right:
+## Contributors
 
-```bash
-sudo snap install task
-```
-
-### Binary
-
-Or you can download the binary from the [releases][releases] page and add to
-your `PATH`. DEB and RPM packages are also available.
-The `task_checksums.txt` file contains the sha256 checksum for each file.
-
-## Usage
-
-Create a file called `Taskfile.yml` in the root of the project.
-The `cmds` attribute should contains the commands of a task.
-The example below allows compile a Go app and uses [Minify][minify] to concat
-and minify multiple CSS files into a single one.
-
-```yml
-build:
-  cmds:
-    - go build -v -i main.go
-
-assets:
-  cmds:
-    - minify -o public/style.css src/css
-```
-
-Running the tasks is as simple as running:
-
-```bash
-task assets build
-```
-
-Task uses [github.com/mvdan/sh](https://github.com/mvdan/sh), a native Go sh
-interpreter. So you can write sh/bash commands and it will work even on
-Windows, where `sh` or `bash` is usually not available. Just remember any
-executable called must be available by the OS or in PATH.
-
-If you ommit a task name, "default" will be assumed.
-
-### Environment
-
-You can specify environment variables that are added when running a command:
-
-```yml
-build:
-  cmds:
-    - echo $hallo
-  env:
-    hallo: welt
-```
-
-### OS specific task
-
-If you add a `Taskfile_{{GOOS}}.yml` you can override or amend your taskfile
-based on the operating system.
-
-Example:
-
-Taskfile.yml:
-
-```yml
-build:
-  cmds:
-    - echo "default"
-```
-
-Taskfile_linux.yml:
-
-```yml
-build:
-  cmds:
-    - echo "linux"
-```
-
-Will print out `linux` and not default.
-
-It's also possible to have OS specific `Taskvars.yml` file, like
-`Taskvars_windows.yml`, `Taskfile_linux.yml` or `Taskvars_darwin.yml`. See the
-[variables section](#variables) below.
-
-### Task directory
-
-By default, tasks will be executed in the directory where the Taskfile is
-located. But you can easily make the task run in another folder informing
-`dir`:
-
-```yml
-serve:
-  dir: public/www
-  cmds:
-    # run http server
-    - caddy
-```
-
-### Task dependencies
-
-You may have tasks that depends on others. Just pointing them on `deps` will
-make them run automatically before running the parent task:
-
-```yml
-build:
-  deps: [assets]
-  cmds:
-    - go build -v -i main.go
-
-assets:
-  cmds:
-    - minify -o public/style.css src/css
-```
-
-In the above example, `assets` will always run right before `build` if you run
-`task build`.
-
-A task can have only dependencies and no commands to group tasks together:
-
-```yml
-assets:
-  deps: [js, css]
-
-js:
-  cmds:
-    - minify -o public/script.js src/js
-
-css:
-  cmds:
-    - minify -o public/style.css src/css
-```
-
-If there are more than one dependency, they always run in parallel for better
-performance.
-
-### Calling another task
-
-When a task has many dependencies, they are executed concurrently. This will
-often result in a faster build pipeline. But in some situations you may need
-to call other tasks serially. In this case, just use the following syntax:
-
-```yml
-main-task:
-  cmds:
-    - task: task-to-be-called
-    - task: another-task
-    - echo "Both done"
-
-task-to-be-called:
-  cmds:
-    - echo "Task to be called"
-
-another-task:
-  cmds:
-    - echo "Another task"
-```
-
-Overriding variables in the called task is as simple as informing `vars`
-attribute:
-
-```yml
-main-task:
-  cmds:
-    - task: write-file
-      vars: {FILE: "hello.txt", CONTENT: "Hello!"}
-    - task: write-file
-      vars: {FILE: "world.txt", CONTENT: "World!"}
-
-write-file:
-  cmds:
-    - echo "{{.CONTENT}}" > {{.FILE}}
-```
-
-The above syntax is also supported in `deps`.
-
-> NOTE: It's also possible to call a task without any param prefixing it
-with `^`, but this syntax is deprecated:
-
-```yml
-a-task:
-  cmds:
-    - ^another-task
-
-another-task:
-  cmds:
-    - echo "Another task"
-```
-
-### Prevent unnecessary work
-
-If a task generates something, you can inform Task the source and generated
-files, so Task will prevent to run them if not necessary.
-
-```yml
-build:
-  deps: [js, css]
-  cmds:
-    - go build -v -i main.go
-
-js:
-  cmds:
-    - minify -o public/script.js src/js
-  sources:
-    - src/js/**/*.js
-  generates:
-    - public/script.js
-
-css:
-  cmds:
-    - minify -o public/style.css src/css
-  sources:
-    - src/css/**/*.css
-  generates:
-    - public/style.css
-```
-
-`sources` and `generates` can be files or file patterns. When both are given,
-Task will compare the modification date/time of the files to determine if it's
-necessary to run the task. If not, it will just print a message like
-`Task "js" is up to date`.
-
-If you prefer this check to be made by the content of the files, instead of
-its timestamp, just set the `method` property to `checksum`.
-You will probably want to ignore the `.task` folder in your `.gitignore` file
-(It's there that Task stores the last checksum).
-This feature is still experimental and can change until it's stable.
-
-```yml
-build:
-  cmds:
-    - go build .
-  sources:
-    - ./*.go
-  generates:
-    - app{{exeExt}}
-  method: checksum
-```
-
-> TIP: method `none` skips any validation and always run the task.
-
-Alternatively, you can inform a sequence of tests as `status`. If no error
-is returned (exit status 0), the task is considered up-to-date:
-
-```yml
-generate-files:
-  cmds:
-    - mkdir directory
-    - touch directory/file1.txt
-    - touch directory/file2.txt
-  # test existence of files
-  status:
-    - test -d directory
-    - test -f directory/file1.txt
-    - test -f directory/file2.txt
-```
-
-You can use `--force` or `-f` if you want to force a task to run even when
-up-to-date.
-
-### Variables
-
-When doing interpolation of variables, Task will look for the below.
-They are listed below in order of importance (e.g. most important first):
-
-- Variables given while calling a task from another.
-  (See [Calling another task](#calling-another-task) above)
-- Environment variables
-- Variables declared locally in the task
-- Variables available in the `Taskvars.yml` file
-
-Example of overriding with environment variables:
-
-```bash
-$ TASK_VARIABLE=a-value task do-something
-```
-
-Since some shells don't support above syntax to set environment variables
-(Windows) tasks also accepts a similar style when not in the beginning of
-the command. Variables given in this form are only visible to the task called
-right before.
-
-```bash
-$ task write-file FILE=file.txt "CONTENT=Hello, World!" print "MESSAGE=All done!"
-```
-
-Example of locally declared vars:
-
-```yml
-print-var:
-  cmds:
-    echo "{{.VAR}}"
-  vars:
-    VAR: Hello!
-```
-
-Example of `Taskvars.yml` file:
-
-```yml
-PROJECT_NAME: My Project
-DEV_MODE: production
-GIT_COMMIT: {sh: git log -n 1 --format=%h}
-```
-
-#### Dynamic variables
-
-The below syntax (`sh:` prop in a variable) is considered a dynamic variable.
-The value will be treated as a command and the output assigned. If there is one
-or more trailing newlines, the last newline will be trimmed.
-
-```yml
-build:
-  cmds:
-    - go build -ldflags="-X main.Version={{.GIT_COMMIT}}" main.go
-  vars:
-    GIT_COMMIT:
-      sh: git log -n 1 --format=%h
-```
-
-This works for all types of variables.
-
-> It's also possible to prefix the variable with `$` to have a dynamic
-variable, but this is now considered deprecated:
-
-```yml
-# Taskvars.yml
-
-# recommended
-GIT_COMMIT:
-  sh: git log -n 1 --format=%h
-
-# deprecated
-GIT_COMMIT: $git log -n 1 --format=%h
-```
-
-### Go's template engine
-
-Task parse commands as [Go's template engine][gotemplate] before executing
-them. Variables are accessible through dot syntax (`.VARNAME`).
-
-All functions by the Go's [sprig lib](http://masterminds.github.io/sprig/)
-are available. The following example gets the current date in a given format:
-
-```yml
-print-date:
-  cmds:
-    - echo {{now | date "2006-01-02"}}
-```
-
-Task also adds the following functions:
-
-- `OS`: Returns operating system. Possible values are "windows", "linux",
-  "darwin" (macOS) and "freebsd".
-- `ARCH`: return the architecture Task was compiled to: "386", "amd64", "arm"
-  or "s390x".
-- `splitLines`: Splits Unix (\n) and Windows (\r\n) styled newlines.
-- `catLines`: Replaces Unix (\n) and Windows (\r\n) styled newlines with a space.
-- `toSlash`: Does nothing on Unix, but on Windows converts a string from `\`
-  path format to `/`.
-- `fromSlash`: Oposite of `toSlash`. Does nothing on Unix, but on Windows
-  converts a string from `\` path format to `/`.
-- `exeExt`: Returns the right executable extension for the current OS
-  (`".exe"` for Windows, `""` for others).
-
-Example:
-
-```yml
-print-os:
-  cmds:
-    - echo '{{OS}} {{ARCH}}'
-    - echo '{{if eq OS "windows"}}windows-command{{else}}unix-command{{end}}'
-    # This will be path/to/file on Unix but path\to\file on Windows
-    - echo '{{fromSlash "path/to/file"}}'
-enumerated-file:
-  vars:
-    CONTENT: |
-      foo
-      bar
-  cmds:
-    - |
-      cat << EOF > output.txt
-      {{range $i, $line := .CONTENT | splitLines -}}
-      {{printf "%3d" $i}}: {{$line}}
-      {{end}}EOF
-```
-
-> NOTE: There are some deprecated function names still available: `ToSlash`,
-`FromSlash` and `ExeExt`. These where changed for consistency with sprig lib.
-
-### Help
-
-Running `task --list` (or `task -l`) lists all tasks with a description.
-The following taskfile:
-
-```yml
-build:
-  desc: Build the go binary.
-  cmds:
-    - go build -v -i main.go
-
-test:
-  desc: Run all the go tests.
-  cmds:
-    - go test -race ./...
-
-js:
-  cmds:
-    - minify -o public/script.js src/js
-
-css:
-  cmds:
-    - minify -o public/style.css src/css
-```
-
-would print the following output:
-
-```bash
-* build:   Build the go binary.
-* test:    Run all the go tests.
-```
-
-## Silent mode
-
-Silent mode disables echoing of commands before Task runs it.
-For the following Taskfile:
-
-```yml
-echo:
-  cmds:
-    - echo "Print something"
-```
-
-Normally this will be print:
-
-```sh
-echo "Print something"
-Print something
-```
-
-With silent mode on, the below will be print instead:
-
-```sh
-Print something
-```
-
-There's three ways to enable silent mode:
-
-* At command level:
-
-```yml
-echo:
-  cmds:
-    - cmd: echo "Print something"
-      silent: true
-```
-
-* At task level:
-
-```yml
-echo:
-  cmds:
-    - echo "Print something"
-  silent: true
-```
-
-* Or globally with `--silent` or `-s` flag
-
-If you want to suppress stdout instead, just redirect a command to `/dev/null`:
-
-```yml
-echo:
-  cmds:
-    - echo "This will print nothing" > /dev/null
-```
-
-## Watch tasks (experimental)
-
-If you give a `--watch` or `-w` argument, task will watch for files changes
-and run the task again. This requires the `sources` attribute to be given,
-so task know which files to watch.
-
-## Examples
-
-The [go-task/examples][examples] intends to be a collection of Taskfiles for
-various use cases.
-(It still lacks many examples, though. Contributions are welcome).
-
-## Task in the wild
-
-- [How I Build My Static Assets for Hugo][post-hugo]
-
-## Alternative task runners
-
-- YAML based:
-  - [tj/robo][robo]
-  - [dogtools/dog][dog]
-  - [goeuro/myke][myke]
-  - [dreadl0ck/zeus][zeus]
-  - [rliebz/tusk][tusk]
-- Go based:
-  - [go-godo/godo][godo]
-  - [markbates/grift][grift]
-  - [nstratos/make.go][make.go]
-  - [magefile/mage][mage]
-- Make based:
-  - [tj/mmake][mmake]
-
-[make]: https://www.gnu.org/software/make/
-[releases]: https://github.com/go-task/task/releases
-[golang]: https://golang.org/
-[gotemplate]: https://golang.org/pkg/text/template/
-[robo]: https://github.com/tj/robo
-[dog]: https://github.com/dogtools/dog
-[myke]: https://github.com/goeuro/myke
-[zeus]: https://github.com/dreadl0ck/zeus
-[tusk]: https://github.com/rliebz/tusk
-[godo]: https://github.com/go-godo/godo
-[grift]: https://github.com/markbates/grift
-[make.go]: https://github.com/nstratos/make.go
-[mage]: https://github.com/magefile/mage
-[mmake]: https://github.com/tj/mmake
-[sh]: https://github.com/mvdan/sh
-[post-hugo]: https://blog.carlmjohnson.net/post/2017/hugo-asset-pipeline/
-[minify]: https://github.com/tdewolff/minify/tree/master/cmd/minify
-[examples]: https://github.com/go-task/examples
-[snapcraft]: https://snapcraft.io/
+[![Contributors](https://opencollective.com/task/contributors.svg?width=890)](https://github.com/go-task/task/graphs/contributors)

Taskfile.yml

@@ -1,55 +1,88 @@
-# compiles current source code and make "task" executable available on
-# $GOPATH/bin/task{.exe}
-install:
-  desc: Installs Task
-  cmds:
-    - go install -v -ldflags="-w -s -X main.version={{.GIT_COMMIT}}" ./cmd/task
+version: '2'
 
-dl-deps:
-  desc: Downloads cli dependencies
-  cmds:
-    - go get -u github.com/golang/lint/golint
-    - go get -u github.com/goreleaser/goreleaser
-    - go get -u github.com/asticode/go-astitodo/astitodo
-    - go get -u github.com/golang/dep/cmd/dep
+includes:
+  docs: ./docs
 
-update-deps:
-  desc: Updates dependencies
-  cmds:
-    - dep ensure
-    - dep ensure -update
-    - dep prune
+vars:
+  GIT_COMMIT:
+    sh: git log -n 1 --format=%h
 
-clean:
-  desc: Cleans temp files and folders
-  cmds:
-    - rm -rf dist/
+  GO_PACKAGES:
+    sh: go list ./...
 
-lint:
-  desc: Runs golint
-  cmds:
-    - golint {{.GO_PACKAGES}}
-  silent: true
+tasks:
+  default:
+    cmds:
+      - task: test
 
-test:
-  desc: Runs test suite
-  deps: [install]
-  cmds:
-    - go test {{.GO_PACKAGES}}
+  install:
+    desc: Installs Task
+    cmds:
+      - go install -v -ldflags="-w -s -X main.version={{.GIT_COMMIT}}" ./cmd/task
+    env:
+      CGO_ENABLED: '0'
 
-# https://github.com/goreleaser/goreleaser
-release:
-  desc: Release Task
-  cmds:
-    - goreleaser
+  dl-deps:
+    desc: Downloads cli dependencies
+    cmds:
+      - task: go-get
+        vars: {REPO: golang.org/x/lint/golint}
+      - task: go-get
+        vars: {REPO: github.com/goreleaser/goreleaser}
+      - task: go-get
+        vars: {REPO: github.com/goreleaser/godownloader}
 
-test-release:
-  desc: Tests release process without publishing
-  cmds:
-    - goreleaser --skip-validate --skip-publish
+  vendor:
+    desc: Sync vendor/ directory according to go.mod file
+    cmds:
+      - go mod vendor
 
-todo:
-  desc: Prints TODO comments present in the code
-  cmds:
-    - astitodo {{.GO_PACKAGES}}
-  silent: true
+  update-deps:
+    desc: Updates dependencies
+    cmds:
+      - dep ensure
+      - dep ensure -update
+
+  clean:
+    desc: Cleans temp files and folders
+    cmds:
+      - rm -rf dist/
+
+  lint:
+    desc: Runs golint
+    cmds:
+      - golint {{catLines .GO_PACKAGES}}
+    silent: true
+
+  test:
+    desc: Runs test suite
+    deps: [install]
+    cmds:
+      - go test {{catLines .GO_PACKAGES}}
+
+  test-release:
+    desc: Tests release process without publishing
+    cmds:
+      - goreleaser --snapshot --rm-dist
+
+  generate-install-script:
+    desc: Generate install script using https://github.com/goreleaser/godownloader
+    cmds:
+      - godownloader --repo go-task/task -o install-task.sh
+      - cp ./install-task.sh ./docs/install.sh
+
+  ci:
+    cmds:
+      - task: go-get
+        vars: {REPO: golang.org/x/lint/golint}
+      - task: lint
+      - task: test
+
+  go-get:
+    cmds:
+      - go get -u {{.REPO}}
+
+  packages:
+    cmds:
+      - echo '{{.GO_PACKAGES}}'
+    silent: true

Taskvars.yml

@@ -1,9 +0,0 @@
-GIT_COMMIT:
-  sh: git log -n 1 --format=%h
-
-GO_PACKAGES:
-  .
-  ./cmd/task
-  ./internal/args
-  ./internal/execext
-  ./internal/status

cmd/redirector/redirector.go

@@ -0,0 +1,421 @@
+// This small web app is used to redirect from the old taskfile.org domain
+// to the new taskfile.dev without breaking CIs that uses cURL to download
+// "/install.sh" without the -L flag (which follow redirects).
+
+package main
+
+import (
+	"net/http"
+)
+
+func main() {
+	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		if r.URL.Path == "/install.sh" {
+			println("Dumping install.sh")
+
+			w.Write(installShContent)
+			return
+		}
+
+		println("Redirecting to https://taskfile.dev" + r.URL.Path)
+
+		w.Header().Set("Location", "https://taskfile.dev"+r.URL.Path)
+		w.WriteHeader(301)
+	})
+
+	println("Listening :8080")
+
+	panic(http.ListenAndServe(":8080", nil))
+}
+
+var installShContent = []byte(`#!/bin/sh
+set -e
+# Code generated by godownloader on 2018-04-07T17:47:38Z. DO NOT EDIT.
+#
+
+usage() {
+  this=$1
+  cat <<EOF
+$this: download go binaries for go-task/task
+
+Usage: $this [-b] bindir [-d] [tag]
+  -b sets bindir or installation directory, Defaults to ./bin
+  -d turns on debug logging
+   [tag] is a tag from
+   https://github.com/go-task/task/releases
+   If tag is missing, then the latest will be used.
+
+ Generated by godownloader
+  https://github.com/goreleaser/godownloader
+
+EOF
+  exit 2
+}
+
+parse_args() {
+  #BINDIR is ./bin unless set be ENV
+  # over-ridden by flag below
+
+  BINDIR=${BINDIR:-./bin}
+  while getopts "b:dh?" arg; do
+    case "$arg" in
+      b) BINDIR="$OPTARG" ;;
+      d) log_set_priority 10 ;;
+      h | \?) usage "$0" ;;
+    esac
+  done
+  shift $((OPTIND - 1))
+  TAG=$1
+}
+# this function wraps all the destructive operations
+# if a curl|bash cuts off the end of the script due to
+# network, either nothing will happen or will syntax error
+# out preventing half-done work
+execute() {
+  tmpdir=$(mktmpdir)
+  log_debug "downloading files into ${tmpdir}"
+  http_download "${tmpdir}/${TARBALL}" "${TARBALL_URL}"
+  http_download "${tmpdir}/${CHECKSUM}" "${CHECKSUM_URL}"
+  hash_sha256_verify "${tmpdir}/${TARBALL}" "${tmpdir}/${CHECKSUM}"
+  srcdir="${tmpdir}"
+  (cd "${tmpdir}" && untar "${TARBALL}")
+  install -d "${BINDIR}"
+  for binexe in "task" ; do
+    if [ "$OS" = "windows" ]; then
+      binexe="${binexe}.exe"
+    fi
+    install "${srcdir}/${binexe}" "${BINDIR}/"
+    log_info "installed ${BINDIR}/${binexe}"
+  done
+}
+is_supported_platform() {
+  platform=$1
+  found=1
+  case "$platform" in
+    windows/386) found=0 ;;
+    windows/amd64) found=0 ;;
+    darwin/386) found=0 ;;
+    darwin/amd64) found=0 ;;
+    linux/386) found=0 ;;
+    linux/amd64) found=0 ;;
+  esac
+  case "$platform" in
+    darwin/386) found=1 ;;
+  esac
+  return $found
+}
+check_platform() {
+  if is_supported_platform "$PLATFORM"; then
+    # optional logging goes here
+    true
+  else
+    log_crit "platform $PLATFORM is not supported.  Make sure this script is up-to-date and file request at https://github.com/${PREFIX}/issues/new"
+    exit 1
+  fi
+}
+tag_to_version() {
+  if [ -z "${TAG}" ]; then
+    log_info "checking GitHub for latest tag"
+  else
+    log_info "checking GitHub for tag '${TAG}'"
+  fi
+  REALTAG=$(github_release "$OWNER/$REPO" "${TAG}") && true
+  if test -z "$REALTAG"; then
+    log_crit "unable to find '${TAG}' - use 'latest' or see https://github.com/${PREFIX}/releases for details"
+    exit 1
+  fi
+  # if version starts with 'v', remove it
+  TAG="$REALTAG"
+  VERSION=${TAG#v}
+}
+adjust_format() {
+  # change format (tar.gz or zip) based on ARCH
+  case ${ARCH} in
+    windows) FORMAT=zip ;;
+  esac
+  true
+}
+adjust_os() {
+  # adjust archive name based on OS
+  true
+}
+adjust_arch() {
+  # adjust archive name based on ARCH
+  true
+}
+
+cat /dev/null <<EOF
+------------------------------------------------------------------------
+https://github.com/client9/shlib - portable posix shell functions
+Public domain - http://unlicense.org
+https://github.com/client9/shlib/blob/master/LICENSE.md
+but credit (and pull requests) appreciated.
+------------------------------------------------------------------------
+EOF
+is_command() {
+  command -v "$1" >/dev/null
+}
+echoerr() {
+  echo "$@" 1>&2
+}
+log_prefix() {
+  echo "$0"
+}
+_logp=6
+log_set_priority() {
+  _logp="$1"
+}
+log_priority() {
+  if test -z "$1"; then
+    echo "$_logp"
+    return
+  fi
+  [ "$1" -le "$_logp" ]
+}
+log_tag() {
+  case $1 in
+    0) echo "emerg" ;;
+    1) echo "alert" ;;
+    2) echo "crit" ;;
+    3) echo "err" ;;
+    4) echo "warning" ;;
+    5) echo "notice" ;;
+    6) echo "info" ;;
+    7) echo "debug" ;;
+    *) echo "$1" ;;
+  esac
+}
+log_debug() {
+  log_priority 7 || return 0
+  echoerr "$(log_prefix)" "$(log_tag 7)" "$@"
+}
+log_info() {
+  log_priority 6 || return 0
+  echoerr "$(log_prefix)" "$(log_tag 6)" "$@"
+}
+log_err() {
+  log_priority 3 || return 0
+  echoerr "$(log_prefix)" "$(log_tag 3)" "$@"
+}
+log_crit() {
+  log_priority 2 || return 0
+  echoerr "$(log_prefix)" "$(log_tag 2)" "$@"
+}
+uname_os() {
+  os=$(uname -s | tr '[:upper:]' '[:lower:]')
+  case "$os" in
+    msys_nt) os="windows" ;;
+  esac
+  echo "$os"
+}
+uname_arch() {
+  arch=$(uname -m)
+  case $arch in
+    x86_64) arch="amd64" ;;
+    x86) arch="386" ;;
+    i686) arch="386" ;;
+    i386) arch="386" ;;
+    aarch64) arch="arm64" ;;
+    armv5*) arch="arm5" ;;
+    armv6*) arch="arm6" ;;
+    armv7*) arch="arm7" ;;
+  esac
+  echo ${arch}
+}
+uname_os_check() {
+  os=$(uname_os)
+  case "$os" in
+    darwin) return 0 ;;
+    dragonfly) return 0 ;;
+    freebsd) return 0 ;;
+    linux) return 0 ;;
+    android) return 0 ;;
+    nacl) return 0 ;;
+    netbsd) return 0 ;;
+    openbsd) return 0 ;;
+    plan9) return 0 ;;
+    solaris) return 0 ;;
+    windows) return 0 ;;
+  esac
+  log_crit "uname_os_check '$(uname -s)' got converted to '$os' which is not a GOOS value. Please file bug at https://github.com/client9/shlib"
+  return 1
+}
+uname_arch_check() {
+  arch=$(uname_arch)
+  case "$arch" in
+    386) return 0 ;;
+    amd64) return 0 ;;
+    arm64) return 0 ;;
+    armv5) return 0 ;;
+    armv6) return 0 ;;
+    armv7) return 0 ;;
+    ppc64) return 0 ;;
+    ppc64le) return 0 ;;
+    mips) return 0 ;;
+    mipsle) return 0 ;;
+    mips64) return 0 ;;
+    mips64le) return 0 ;;
+    s390x) return 0 ;;
+    amd64p32) return 0 ;;
+  esac
+  log_crit "uname_arch_check '$(uname -m)' got converted to '$arch' which is not a GOARCH value.  Please file bug report at https://github.com/client9/shlib"
+  return 1
+}
+untar() {
+  tarball=$1
+  case "${tarball}" in
+    *.tar.gz | *.tgz) tar -xzf "${tarball}" ;;
+    *.tar) tar -xf "${tarball}" ;;
+    *.zip) unzip "${tarball}" ;;
+    *)
+      log_err "untar unknown archive format for ${tarball}"
+      return 1
+      ;;
+  esac
+}
+mktmpdir() {
+  test -z "$TMPDIR" && TMPDIR="$(mktemp -d)"
+  mkdir -p "${TMPDIR}"
+  echo "${TMPDIR}"
+}
+http_download_curl() {
+  local_file=$1
+  source_url=$2
+  header=$3
+  if [ -z "$header" ]; then
+    code=$(curl -w '%{http_code}' -sL -o "$local_file" "$source_url")
+  else
+    code=$(curl -w '%{http_code}' -sL -H "$header" -o "$local_file" "$source_url")
+  fi
+  if [ "$code" != "200" ]; then
+    log_debug "http_download_curl received HTTP status $code"
+    return 1
+  fi
+  return 0
+}
+http_download_wget() {
+  local_file=$1
+  source_url=$2
+  header=$3
+  if [ -z "$header" ]; then
+    wget -q -O "$local_file" "$source_url"
+  else
+    wget -q --header "$header" -O "$local_file" "$source_url"
+  fi
+}
+http_download() {
+  log_debug "http_download $2"
+  if is_command curl; then
+    http_download_curl "$@"
+    return
+  elif is_command wget; then
+    http_download_wget "$@"
+    return
+  fi
+  log_crit "http_download unable to find wget or curl"
+  return 1
+}
+http_copy() {
+  tmp=$(mktemp)
+  http_download "${tmp}" "$1" "$2" || return 1
+  body=$(cat "$tmp")
+  rm -f "${tmp}"
+  echo "$body"
+}
+github_release() {
+  owner_repo=$1
+  version=$2
+  test -z "$version" && version="latest"
+  giturl="https://github.com/${owner_repo}/releases/${version}"
+  json=$(http_copy "$giturl" "Accept:application/json")
+  test -z "$json" && return 1
+  version=$(echo "$json" | tr -s '\n' ' ' | sed 's/.*"tag_name":"//' | sed 's/".*//')
+  test -z "$version" && return 1
+  echo "$version"
+}
+hash_sha256() {
+  TARGET=${1:-/dev/stdin}
+  if is_command gsha256sum; then
+    hash=$(gsha256sum "$TARGET") || return 1
+    echo "$hash" | cut -d ' ' -f 1
+  elif is_command sha256sum; then
+    hash=$(sha256sum "$TARGET") || return 1
+    echo "$hash" | cut -d ' ' -f 1
+  elif is_command shasum; then
+    hash=$(shasum -a 256 "$TARGET" 2>/dev/null) || return 1
+    echo "$hash" | cut -d ' ' -f 1
+  elif is_command openssl; then
+    hash=$(openssl -dst openssl dgst -sha256 "$TARGET") || return 1
+    echo "$hash" | cut -d ' ' -f a
+  else
+    log_crit "hash_sha256 unable to find command to compute sha-256 hash"
+    return 1
+  fi
+}
+hash_sha256_verify() {
+  TARGET=$1
+  checksums=$2
+  if [ -z "$checksums" ]; then
+    log_err "hash_sha256_verify checksum file not specified in arg2"
+    return 1
+  fi
+  BASENAME=${TARGET##*/}
+  want=$(grep "${BASENAME}" "${checksums}" 2>/dev/null | tr '\t' ' ' | cut -d ' ' -f 1)
+  if [ -z "$want" ]; then
+    log_err "hash_sha256_verify unable to find checksum for '${TARGET}' in '${checksums}'"
+    return 1
+  fi
+  got=$(hash_sha256 "$TARGET")
+  if [ "$want" != "$got" ]; then
+    log_err "hash_sha256_verify checksum for '$TARGET' did not verify ${want} vs $got"
+    return 1
+  fi
+}
+cat /dev/null <<EOF
+------------------------------------------------------------------------
+End of functions from https://github.com/client9/shlib
+------------------------------------------------------------------------
+EOF
+
+PROJECT_NAME="task"
+OWNER=go-task
+REPO="task"
+BINARY=task
+FORMAT=tar.gz
+OS=$(uname_os)
+ARCH=$(uname_arch)
+PREFIX="$OWNER/$REPO"
+
+# use in logging routines
+log_prefix() {
+	echo "$PREFIX"
+}
+PLATFORM="${OS}/${ARCH}"
+GITHUB_DOWNLOAD=https://github.com/${OWNER}/${REPO}/releases/download
+
+uname_os_check "$OS"
+uname_arch_check "$ARCH"
+
+parse_args "$@"
+
+check_platform
+
+tag_to_version
+
+adjust_format
+
+adjust_os
+
+adjust_arch
+
+log_info "found version: ${VERSION} for ${TAG}/${OS}/${ARCH}"
+
+NAME=${BINARY}_${OS}_${ARCH}
+TARBALL=${NAME}.${FORMAT}
+TARBALL_URL=${GITHUB_DOWNLOAD}/${TAG}/${TARBALL}
+CHECKSUM=task_checksums.txt
+CHECKSUM_URL=${GITHUB_DOWNLOAD}/${TAG}/${CHECKSUM}
+
+
+execute
+`)

cmd/task/task.go

@@ -5,10 +5,11 @@ import (
 	"log"
 	"os"
 	"os/signal"
+	"path/filepath"
 	"syscall"
 
-	"github.com/go-task/task"
-	"github.com/go-task/task/internal/args"
+	"github.com/go-task/task/v2"
+	"github.com/go-task/task/v2/internal/args"
 
 	"github.com/spf13/pflag"
 )
@@ -17,7 +18,7 @@ var (
 	version = "master"
 )
 
-const usage = `Usage: task [-ilfwvsd] [--init] [--list] [--force] [--watch] [--verbose] [--silent] [--dir] [task...]
+const usage = `Usage: task [-ilfwvsd] [--init] [--list] [--force] [--watch] [--verbose] [--silent] [--dir] [--taskfile] [--dry] [--summary] [task...]
 
 Runs the specified task(s). Falls back to the "default" task if no task name
 was specified, or lists all tasks if an unknown task name was specified.
@@ -50,21 +51,31 @@ func main() {
 		versionFlag bool
 		init        bool
 		list        bool
+		status      bool
 		force       bool
 		watch       bool
 		verbose     bool
 		silent      bool
+		dry         bool
+		summary     bool
 		dir         string
+		entrypoint  string
+		output      string
 	)
 
 	pflag.BoolVar(&versionFlag, "version", false, "show Task version")
 	pflag.BoolVarP(&init, "init", "i", false, "creates a new Taskfile.yml in the current folder")
 	pflag.BoolVarP(&list, "list", "l", false, "lists tasks with description of current Taskfile")
+	pflag.BoolVar(&status, "status", false, "exits with non-zero exit code if any of the given tasks is not up-to-date")
 	pflag.BoolVarP(&force, "force", "f", false, "forces execution even when the task is up-to-date")
 	pflag.BoolVarP(&watch, "watch", "w", false, "enables watch of the given task")
 	pflag.BoolVarP(&verbose, "verbose", "v", false, "enables verbose mode")
 	pflag.BoolVarP(&silent, "silent", "s", false, "disables echoing")
+	pflag.BoolVar(&dry, "dry", false, "compiles and prints tasks in the order that they would be run, without executing them")
+	pflag.BoolVar(&summary, "summary", false, "show summary about a task")
 	pflag.StringVarP(&dir, "dir", "d", "", "sets directory of execution")
+	pflag.StringVarP(&entrypoint, "taskfile", "t", "", `choose which Taskfile to run. Defaults to "Taskfile.yml"`)
+	pflag.StringVarP(&output, "output", "o", "", "sets output style: [interleaved|group|prefixed]")
 	pflag.Parse()
 
 	if versionFlag {
@@ -83,20 +94,34 @@ func main() {
 		return
 	}
 
-	e := task.Executor{
-		Force:   force,
-		Watch:   watch,
-		Verbose: verbose,
-		Silent:  silent,
-		Dir:     dir,
+	if dir != "" && entrypoint != "" {
+		log.Fatal("task: You can't set both --dir and --taskfile")
+		return
+	}
+	if entrypoint != "" {
+		dir = filepath.Dir(entrypoint)
+		entrypoint = filepath.Base(entrypoint)
+	} else {
+		entrypoint = "Taskfile.yml"
+	}
 
-		Context: getSignalContext(),
+	e := task.Executor{
+		Force:      force,
+		Watch:      watch,
+		Verbose:    verbose,
+		Silent:     silent,
+		Dir:        dir,
+		Dry:        dry,
+		Entrypoint: entrypoint,
+		Summary:    summary,
 
 		Stdin:  os.Stdin,
 		Stdout: os.Stdout,
 		Stderr: os.Stderr,
+
+		OutputStyle: output,
 	}
-	if err := e.ReadTaskfile(); err != nil {
+	if err := e.Setup(); err != nil {
 		log.Fatal(err)
 	}
 
@@ -111,12 +136,24 @@ func main() {
 		arguments = []string{"default"}
 	}
 
-	calls, err := args.Parse(arguments...)
-	if err != nil {
-		log.Fatal(err)
+	calls, globals := args.Parse(arguments...)
+	for name, value := range globals {
+		e.Taskfile.Vars[name] = value
 	}
 
-	if err := e.Run(calls...); err != nil {
+	ctx := context.Background()
+	if !watch {
+		ctx = getSignalContext()
+	}
+
+	if status {
+		if err := e.Status(ctx, calls...); err != nil {
+			log.Fatal(err)
+		}
+		return
+	}
+
+	if err := e.Run(ctx, calls...); err != nil {
 		log.Fatal(err)
 	}
 }

completion/zsh/_task

@@ -0,0 +1,25 @@
+#compdef task
+
+# Listing commands from Taskfile.yml
+function __list() {
+    local -a scripts
+
+    if [ -f Taskfile.yml ]; then
+        scripts=($(task -l | sed '1d' | sed 's/^\* //' | awk '{ print $1 }' | sed 's/:$//' | sed 's/:/\\:/'))
+        _describe 'script' scripts
+    fi
+}
+
+_arguments \
+    '(-d --dir)'{-d,--dir}': :_files' \
+    '(--dry)'--dry \
+    '(-f --force)'{-f,--force} \
+    '(-i --init)'{-i,--init} \
+    '(-l --list)'{-l,--list} \
+    '(-s --silent)'{-s,--silent} \
+    '(--status)'--status \
+    '(-v --verbose)'{-v,--verbose} \
+    '(--version)'--version \
+    '(-w --watch)'{-w,--watch} \
+    '(- *)'{-h,--help} \
+    '*: :__list' \

docs/CNAME

@@ -0,0 +1 @@
+taskfile.dev

docs/README.md

@@ -0,0 +1,59 @@
+# Task
+
+Task is a task runner / build tool that aims to be simpler and easier to use
+than, for example, [GNU Make][make].
+
+Since it's written in [Go][go], Task is just a single binary and has no other
+dependencies, which means you don't need to mess with any complicated install
+setups just to use a build tool.
+
+Once [installed](installation.md), you just need to describe your build tasks
+using a simple [YAML][yaml] schema in a file called `Taskfile.yml`:
+
+```yaml
+version: '2'
+
+tasks:
+  hello:
+    cmds:
+      - echo 'Hello World from Task!'
+    silent: true
+```
+
+And call it by running `task hello` from you terminal.
+
+The above example is just the start, you can take a look at the [usage](usage.md)
+guide to check the full schema documentation and Task features.
+
+## Features
+
+- [Easy installation](installation.md): just download a single binary, add to
+  $PATH and you're done! Or you can also install using [Homebrew][homebrew],
+  [Snapcraft][snapcraft], or [Scoop][scoop] if you want;
+- Available on CIs: by adding [this simple command](installation.md#install-script)
+  to install on your CI script and you're done to use Task as part of your CI pipeline;
+- Truly cross-platform: while most build tools only work well on Linux or macOS,
+  Task also supports Windows thanks to [this awesome shell interpreter for Go][sh];
+- Great for code generation: you can easily [prevent a task from running](usage.md#prevent-unnecessary-work)
+  if a given set of files haven't changed since last run (based either on its
+  timestamp or content).
+
+## Sponsors
+
+[![Sponsors](https://opencollective.com/task/sponsors.svg?width=890)](https://opencollective.com/task)
+
+## Backers
+
+[![Backers](https://opencollective.com/task/backers.svg?width=890)](https://opencollective.com/task)
+
+## Contributors
+
+[![Contributors](https://opencollective.com/task/contributors.svg?width=890)](https://github.com/go-task/task/graphs/contributors)
+
+[make]: https://www.gnu.org/software/make/
+[go]: https://golang.org/
+[yaml]: http://yaml.org/
+[homebrew]: https://brew.sh/
+[snapcraft]: https://snapcraft.io/
+[scoop]: https://scoop.sh/
+[sh]: https://mvdan.cc/sh

docs/Taskfile.yml

@@ -0,0 +1,12 @@
+version: '2'
+
+tasks:
+  install:
+    desc: Installs docsify to work the on the documentation site
+    cmds:
+      - npm install docsify-cli -g
+
+  serve:
+    desc: Serves the documentation site locally
+    cmds:
+      - docsify serve docs

docs/_sidebar.md

@@ -0,0 +1,7 @@
+- [Installation](installation.md)
+- [Usage](usage.md)
+- [Taskfile Versions](taskfile_versions.md)
+- [Examples](examples.md)
+- [Releasing Task](releasing_task.md)
+- [Alternative Task Runners](alternative_task_runners.md)
+- [![Github](https://icongram.jgog.in/simple/github.svg?color=808080&size=16)Github](https://github.com/go-task/task)

docs/alternative_task_runners.md

@@ -0,0 +1,17 @@
+# Alternative task runners
+
+## YAML based
+
+- [rliebz/tusk][tusk]
+
+## Go based
+
+- [magefile/mage][mage]
+
+## Make similar
+
+- [casey/just][just]
+
+[tusk]: https://github.com/rliebz/tusk
+[mage]: https://github.com/magefile/mage
+[just]: https://github.com/casey/just

docs/examples.md

@@ -0,0 +1,7 @@
+# Examples
+
+The [go-task/examples][examples] intends to be a collection of Taskfiles for
+various use cases.
+(It still lacks many examples, though. Contributions are welcome).
+
+[examples]: https://github.com/go-task/examples

docs/index.html

@@ -0,0 +1,49 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8">
+    <title>Task</title>
+    <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />
+    <meta name="description" content="A task runner / simpler Make alternative written in Go">
+    <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
+    <link rel="stylesheet" href="//unpkg.com/docsify-themeable/dist/css/theme-simple.css">
+    <meta name="google-site-verification" content="VGAYkbdmuaciIDGkBe-eAg9yfZg0C6ostgonbGxxOa0" />
+    <script>
+      var SeedAndDewConfig = {};
+      (function() {
+        SeedAndDewConfig['adClass'] = "snd-ad";
+        /* * * DON'T EDIT BELOW THIS LINE * * */
+        SeedAndDewConfig['projectId'] = '16e0aed0-b265-48c9-9eae-0aad56147553';
+        SeedAndDewConfig['loadStartTime'] = performance.now();
+        SeedAndDewConfig['apiVersion'] = '2018-05-28'
+        SeedAndDewConfig['sessionId'] = Math.random().toString(36).substring(2, 15);
+        var snd = document.createElement('script');
+        snd.type = 'text/javascript';
+        snd.async = true;
+        snd.src = 'https://www.seedanddew.com/static/embed.min.js';
+        (document.getElementsByTagName('head')[0] ||
+        document.getElementsByTagName('body')[0]).appendChild(snd);
+      })();
+    </script>
+  </head>
+  <body>
+    <div id="app"></div>
+    <script>
+      window.$docsify = {
+        name: 'Task',
+        repo: 'go-task/task',
+        ga: 'UA-126286662-1',
+        themeColor: '#00add8',
+        loadSidebar: true,
+        auto2top: true,
+        maxLevel: 3,
+        subMaxLevel: 3
+      }
+    </script>
+    <script src="//unpkg.com/docsify/lib/docsify.min.js"></script>
+    <script src="//unpkg.com/docsify/lib/plugins/ga.min.js"></script>
+    <script src="//unpkg.com/docsify-themeable"></script>
+    <script src="//unpkg.com/prismjs/components/prism-bash.min.js"></script>
+    <script src="//unpkg.com/prismjs/components/prism-yaml.min.js"></script>
+  </body>
+</html>

docs/install.sh

@@ -0,0 +1,390 @@
+#!/bin/sh
+set -e
+# Code generated by godownloader on 2018-04-07T17:47:38Z. DO NOT EDIT.
+#
+
+usage() {
+  this=$1
+  cat <<EOF
+$this: download go binaries for go-task/task
+
+Usage: $this [-b] bindir [-d] [tag]
+  -b sets bindir or installation directory, Defaults to ./bin
+  -d turns on debug logging
+   [tag] is a tag from
+   https://github.com/go-task/task/releases
+   If tag is missing, then the latest will be used.
+
+ Generated by godownloader
+  https://github.com/goreleaser/godownloader
+
+EOF
+  exit 2
+}
+
+parse_args() {
+  #BINDIR is ./bin unless set be ENV
+  # over-ridden by flag below
+
+  BINDIR=${BINDIR:-./bin}
+  while getopts "b:dh?" arg; do
+    case "$arg" in
+      b) BINDIR="$OPTARG" ;;
+      d) log_set_priority 10 ;;
+      h | \?) usage "$0" ;;
+    esac
+  done
+  shift $((OPTIND - 1))
+  TAG=$1
+}
+# this function wraps all the destructive operations
+# if a curl|bash cuts off the end of the script due to
+# network, either nothing will happen or will syntax error
+# out preventing half-done work
+execute() {
+  tmpdir=$(mktmpdir)
+  log_debug "downloading files into ${tmpdir}"
+  http_download "${tmpdir}/${TARBALL}" "${TARBALL_URL}"
+  http_download "${tmpdir}/${CHECKSUM}" "${CHECKSUM_URL}"
+  hash_sha256_verify "${tmpdir}/${TARBALL}" "${tmpdir}/${CHECKSUM}"
+  srcdir="${tmpdir}"
+  (cd "${tmpdir}" && untar "${TARBALL}")
+  install -d "${BINDIR}"
+  for binexe in "task" ; do
+    if [ "$OS" = "windows" ]; then
+      binexe="${binexe}.exe"
+    fi
+    install "${srcdir}/${binexe}" "${BINDIR}/"
+    log_info "installed ${BINDIR}/${binexe}"
+  done
+}
+is_supported_platform() {
+  platform=$1
+  found=1
+  case "$platform" in
+    windows/386) found=0 ;;
+    windows/amd64) found=0 ;;
+    darwin/386) found=0 ;;
+    darwin/amd64) found=0 ;;
+    linux/386) found=0 ;;
+    linux/amd64) found=0 ;;
+  esac
+  case "$platform" in
+    darwin/386) found=1 ;;
+  esac
+  return $found
+}
+check_platform() {
+  if is_supported_platform "$PLATFORM"; then
+    # optional logging goes here
+    true
+  else
+    log_crit "platform $PLATFORM is not supported.  Make sure this script is up-to-date and file request at https://github.com/${PREFIX}/issues/new"
+    exit 1
+  fi
+}
+tag_to_version() {
+  if [ -z "${TAG}" ]; then
+    log_info "checking GitHub for latest tag"
+  else
+    log_info "checking GitHub for tag '${TAG}'"
+  fi
+  REALTAG=$(github_release "$OWNER/$REPO" "${TAG}") && true
+  if test -z "$REALTAG"; then
+    log_crit "unable to find '${TAG}' - use 'latest' or see https://github.com/${PREFIX}/releases for details"
+    exit 1
+  fi
+  # if version starts with 'v', remove it
+  TAG="$REALTAG"
+  VERSION=${TAG#v}
+}
+adjust_format() {
+  # change format (tar.gz or zip) based on ARCH
+  case ${ARCH} in
+    windows) FORMAT=zip ;;
+  esac
+  true
+}
+adjust_os() {
+  # adjust archive name based on OS
+  true
+}
+adjust_arch() {
+  # adjust archive name based on ARCH
+  true
+}
+
+cat /dev/null <<EOF
+------------------------------------------------------------------------
+https://github.com/client9/shlib - portable posix shell functions
+Public domain - http://unlicense.org
+https://github.com/client9/shlib/blob/master/LICENSE.md
+but credit (and pull requests) appreciated.
+------------------------------------------------------------------------
+EOF
+is_command() {
+  command -v "$1" >/dev/null
+}
+echoerr() {
+  echo "$@" 1>&2
+}
+log_prefix() {
+  echo "$0"
+}
+_logp=6
+log_set_priority() {
+  _logp="$1"
+}
+log_priority() {
+  if test -z "$1"; then
+    echo "$_logp"
+    return
+  fi
+  [ "$1" -le "$_logp" ]
+}
+log_tag() {
+  case $1 in
+    0) echo "emerg" ;;
+    1) echo "alert" ;;
+    2) echo "crit" ;;
+    3) echo "err" ;;
+    4) echo "warning" ;;
+    5) echo "notice" ;;
+    6) echo "info" ;;
+    7) echo "debug" ;;
+    *) echo "$1" ;;
+  esac
+}
+log_debug() {
+  log_priority 7 || return 0
+  echoerr "$(log_prefix)" "$(log_tag 7)" "$@"
+}
+log_info() {
+  log_priority 6 || return 0
+  echoerr "$(log_prefix)" "$(log_tag 6)" "$@"
+}
+log_err() {
+  log_priority 3 || return 0
+  echoerr "$(log_prefix)" "$(log_tag 3)" "$@"
+}
+log_crit() {
+  log_priority 2 || return 0
+  echoerr "$(log_prefix)" "$(log_tag 2)" "$@"
+}
+uname_os() {
+  os=$(uname -s | tr '[:upper:]' '[:lower:]')
+  case "$os" in
+    msys_nt) os="windows" ;;
+  esac
+  echo "$os"
+}
+uname_arch() {
+  arch=$(uname -m)
+  case $arch in
+    x86_64) arch="amd64" ;;
+    x86) arch="386" ;;
+    i686) arch="386" ;;
+    i386) arch="386" ;;
+    aarch64) arch="arm64" ;;
+    armv5*) arch="arm5" ;;
+    armv6*) arch="arm6" ;;
+    armv7*) arch="arm7" ;;
+  esac
+  echo ${arch}
+}
+uname_os_check() {
+  os=$(uname_os)
+  case "$os" in
+    darwin) return 0 ;;
+    dragonfly) return 0 ;;
+    freebsd) return 0 ;;
+    linux) return 0 ;;
+    android) return 0 ;;
+    nacl) return 0 ;;
+    netbsd) return 0 ;;
+    openbsd) return 0 ;;
+    plan9) return 0 ;;
+    solaris) return 0 ;;
+    windows) return 0 ;;
+  esac
+  log_crit "uname_os_check '$(uname -s)' got converted to '$os' which is not a GOOS value. Please file bug at https://github.com/client9/shlib"
+  return 1
+}
+uname_arch_check() {
+  arch=$(uname_arch)
+  case "$arch" in
+    386) return 0 ;;
+    amd64) return 0 ;;
+    arm64) return 0 ;;
+    armv5) return 0 ;;
+    armv6) return 0 ;;
+    armv7) return 0 ;;
+    ppc64) return 0 ;;
+    ppc64le) return 0 ;;
+    mips) return 0 ;;
+    mipsle) return 0 ;;
+    mips64) return 0 ;;
+    mips64le) return 0 ;;
+    s390x) return 0 ;;
+    amd64p32) return 0 ;;
+  esac
+  log_crit "uname_arch_check '$(uname -m)' got converted to '$arch' which is not a GOARCH value.  Please file bug report at https://github.com/client9/shlib"
+  return 1
+}
+untar() {
+  tarball=$1
+  case "${tarball}" in
+    *.tar.gz | *.tgz) tar -xzf "${tarball}" ;;
+    *.tar) tar -xf "${tarball}" ;;
+    *.zip) unzip "${tarball}" ;;
+    *)
+      log_err "untar unknown archive format for ${tarball}"
+      return 1
+      ;;
+  esac
+}
+mktmpdir() {
+  test -z "$TMPDIR" && TMPDIR="$(mktemp -d)"
+  mkdir -p "${TMPDIR}"
+  echo "${TMPDIR}"
+}
+http_download_curl() {
+  local_file=$1
+  source_url=$2
+  header=$3
+  if [ -z "$header" ]; then
+    code=$(curl -w '%{http_code}' -sL -o "$local_file" "$source_url")
+  else
+    code=$(curl -w '%{http_code}' -sL -H "$header" -o "$local_file" "$source_url")
+  fi
+  if [ "$code" != "200" ]; then
+    log_debug "http_download_curl received HTTP status $code"
+    return 1
+  fi
+  return 0
+}
+http_download_wget() {
+  local_file=$1
+  source_url=$2
+  header=$3
+  if [ -z "$header" ]; then
+    wget -q -O "$local_file" "$source_url"
+  else
+    wget -q --header "$header" -O "$local_file" "$source_url"
+  fi
+}
+http_download() {
+  log_debug "http_download $2"
+  if is_command curl; then
+    http_download_curl "$@"
+    return
+  elif is_command wget; then
+    http_download_wget "$@"
+    return
+  fi
+  log_crit "http_download unable to find wget or curl"
+  return 1
+}
+http_copy() {
+  tmp=$(mktemp)
+  http_download "${tmp}" "$1" "$2" || return 1
+  body=$(cat "$tmp")
+  rm -f "${tmp}"
+  echo "$body"
+}
+github_release() {
+  owner_repo=$1
+  version=$2
+  test -z "$version" && version="latest"
+  giturl="https://github.com/${owner_repo}/releases/${version}"
+  json=$(http_copy "$giturl" "Accept:application/json")
+  test -z "$json" && return 1
+  version=$(echo "$json" | tr -s '\n' ' ' | sed 's/.*"tag_name":"//' | sed 's/".*//')
+  test -z "$version" && return 1
+  echo "$version"
+}
+hash_sha256() {
+  TARGET=${1:-/dev/stdin}
+  if is_command gsha256sum; then
+    hash=$(gsha256sum "$TARGET") || return 1
+    echo "$hash" | cut -d ' ' -f 1
+  elif is_command sha256sum; then
+    hash=$(sha256sum "$TARGET") || return 1
+    echo "$hash" | cut -d ' ' -f 1
+  elif is_command shasum; then
+    hash=$(shasum -a 256 "$TARGET" 2>/dev/null) || return 1
+    echo "$hash" | cut -d ' ' -f 1
+  elif is_command openssl; then
+    hash=$(openssl -dst openssl dgst -sha256 "$TARGET") || return 1
+    echo "$hash" | cut -d ' ' -f a
+  else
+    log_crit "hash_sha256 unable to find command to compute sha-256 hash"
+    return 1
+  fi
+}
+hash_sha256_verify() {
+  TARGET=$1
+  checksums=$2
+  if [ -z "$checksums" ]; then
+    log_err "hash_sha256_verify checksum file not specified in arg2"
+    return 1
+  fi
+  BASENAME=${TARGET##*/}
+  want=$(grep "${BASENAME}" "${checksums}" 2>/dev/null | tr '\t' ' ' | cut -d ' ' -f 1)
+  if [ -z "$want" ]; then
+    log_err "hash_sha256_verify unable to find checksum for '${TARGET}' in '${checksums}'"
+    return 1
+  fi
+  got=$(hash_sha256 "$TARGET")
+  if [ "$want" != "$got" ]; then
+    log_err "hash_sha256_verify checksum for '$TARGET' did not verify ${want} vs $got"
+    return 1
+  fi
+}
+cat /dev/null <<EOF
+------------------------------------------------------------------------
+End of functions from https://github.com/client9/shlib
+------------------------------------------------------------------------
+EOF
+
+PROJECT_NAME="task"
+OWNER=go-task
+REPO="task"
+BINARY=task
+FORMAT=tar.gz
+OS=$(uname_os)
+ARCH=$(uname_arch)
+PREFIX="$OWNER/$REPO"
+
+# use in logging routines
+log_prefix() {
+	echo "$PREFIX"
+}
+PLATFORM="${OS}/${ARCH}"
+GITHUB_DOWNLOAD=https://github.com/${OWNER}/${REPO}/releases/download
+
+uname_os_check "$OS"
+uname_arch_check "$ARCH"
+
+parse_args "$@"
+
+check_platform
+
+tag_to_version
+
+adjust_format
+
+adjust_os
+
+adjust_arch
+
+log_info "found version: ${VERSION} for ${TAG}/${OS}/${ARCH}"
+
+NAME=${BINARY}_${OS}_${ARCH}
+TARBALL=${NAME}.${FORMAT}
+TARBALL_URL=${GITHUB_DOWNLOAD}/${TAG}/${TARBALL}
+CHECKSUM=task_checksums.txt
+CHECKSUM_URL=${GITHUB_DOWNLOAD}/${TAG}/${CHECKSUM}
+
+
+execute

docs/installation.md

@@ -0,0 +1,92 @@
+# Installation
+
+## Binary
+
+Or you can download the binary from the [releases][releases] page and add to
+your $PATH. DEB and RPM packages are also available.
+The `task_checksums.txt` file contains the sha256 checksum for each file.
+
+## Homebrew
+
+If you're on macOS or Linux and have [Homebrew][homebrew] installed, getting
+Task is as simple as running:
+
+```bash
+brew install go-task/tap/go-task
+```
+
+> This installation method is only currently supported on amd64 architectures.
+
+## Snap
+
+Task is available for [Snapcraft][snapcraft], but keep in mind that your
+Linux distribution should allow classic confinement for Snaps to Task work
+right:
+
+```bash
+sudo snap install task
+```
+
+## Scoop
+
+If you're on Windows and have [Scoop][scoop] installed, use `extras` bucket
+to install Task like:
+
+```cmd
+scoop bucket add extras
+scoop install task
+```
+
+This installation method is community owned. After a new release of Task, it
+may take some time until it's available on Scoop.
+
+## Go
+
+Task now uses [Go Modules](https://github.com/golang/go/wiki/Modules), which
+means you may have trouble compiling it on older Go versions.
+
+For CI environments we recommend using the [Install Script](#install-script)
+instead, which is faster and more stable, since it'll just download the latest
+released binary, instead of compiling the edge (master branch) version.
+
+Installing in your `$GOPATH`:
+
+```bash
+go get -u -v github.com/go-task/task/cmd/task
+```
+
+Installing in another directory:
+
+```bash
+git clone https://github.com/go-task/task
+cd task
+
+# compiling binary to $GOPATH/bin
+go install -v
+
+# compiling it to another location
+# use -o ./task.exe on Windows
+go build -v -o ./task ./cmd/task
+```
+
+Both methods requires having the [Go][go] environment properly setup locally.
+
+## Install script
+
+We also have a [install script][installscript], which is very useful on
+scenarios like CIs. Many thanks to [godownloader][godownloader] for allowing
+easily generating this script.
+
+```bash
+curl -sL https://taskfile.dev/install.sh | sh
+```
+
+> This method will download the binary on the local `./bin` directory by default.
+
+[go]: https://golang.org/
+[snapcraft]: https://snapcraft.io/
+[homebrew]: https://brew.sh/
+[installscript]: https://github.com/go-task/task/blob/master/install-task.sh
+[releases]: https://github.com/go-task/task/releases
+[godownloader]: https://github.com/goreleaser/godownloader
+[scoop]: https://scoop.sh/

docs/releasing_task.md

@@ -0,0 +1,39 @@
+# Releasing Task
+
+The release process of Task is done with the help of
+[GoReleaser][goreleaser]. You can test the release process locally by calling
+the `test-release` task of the Taskfile.
+
+The Travis CI should release automatically when a new
+Git tag is pushed to master, either for the artifact uploading (raw executables
+and DEB and RPM packages)
+
+# Homebrew
+
+To release a new version on the [Homebrew tap][homebrewtap] edit the
+[Formula/go-task.rb][gotaskrb] file, updating with the new version, download
+URL and sha256.
+
+# Snapcraft
+
+The exception is the publishing of a new version of the
+[snap package][snappackage]. This current require two steps after publishing
+the binaries:
+
+* Updating the current version on [snapcraft.yaml][snapcraftyaml];
+* Moving both `i386` and `amd64` new artifacts to the stable channel on
+the [Snapcraft dashboard][snapcraftdashboard]
+
+# Scoop
+
+Scoop is a community owned installation method. Scoop owners usually take care
+of updating versions there by editing
+[this file](https://github.com/lukesampson/scoop-extras/blob/master/bucket/task.json).
+If you think its Task version is outdated, open an issue to let us know.
+
+[goreleaser]: https://goreleaser.com/#continuous_integration
+[homebrewtap]: https://github.com/go-task/homebrew-tap
+[gotaskrb]: https://github.com/go-task/homebrew-tap/blob/master/Formula/go-task.rb
+[snappackage]: https://github.com/go-task/snap
+[snapcraftyaml]: https://github.com/go-task/snap/blob/master/snap/snapcraft.yaml#L2
+[snapcraftdashboard]: https://dashboard.snapcraft.io/

docs/taskfile_versions.md

@@ -0,0 +1,163 @@
+# Taskfile Versions
+
+The Taskfile syntax and features changed with time. This document explains what
+changed on each version and how to upgrade your Taskfile.
+
+## What the Taskfile version mean
+
+The Taskfile version follows the Task version. E.g. the change to Taskfile
+version `2` means that Task `v2.0.0` should be release to support it.
+
+The `version:` key on Taskfile accepts a semver string, so either `2`, `2.0` or
+`2.0.0` is accepted. You you choose to use `2.0` Task will not enable future
+`2.1` features, but if you choose to use `2`, than any `2.x.x` features will be
+available, but not `3.0.0+`.
+
+## Version 1
+
+In the first version of the `Taskfile`, the `version:` key was not available,
+because the tasks was in the root of the YAML document. Like this:
+
+```yaml
+echo:
+  cmds:
+    - echo "Hello, World!"
+```
+
+The variable priority order was also different:
+
+1. Call variables
+2. Environment
+3. Task variables
+4. `Taskvars.yml` variables
+
+## Version 2.0
+
+At version 2, we introduced the `version:` key, to allow us to envolve Task
+with new features without breaking existing Taskfiles. The new syntax is as
+follows:
+
+```yaml
+version: '2'
+
+tasks:
+  echo:
+    cmds:
+      - echo "Hello, World!"
+```
+
+Version 2 allows you to write global variables directly in the Taskfile,
+if you don't want to create a `Taskvars.yml`:
+
+```yaml
+version: '2'
+
+vars:
+  GREETING: Hello, World!
+
+tasks:
+  greet:
+    cmds:
+      - echo "{{.GREETING}}"
+```
+
+The variable priority order changed to the following:
+
+1. Task variables
+2. Call variables
+3. Taskfile variables
+4. Taskvars file variables
+5. Environment variables
+
+A new global option was added to configure the number of variables expansions
+(which default to 2):
+
+```yaml
+version: '2'
+
+expansions: 3
+
+vars:
+  FOO: foo
+  BAR: bar
+  BAZ: baz
+  FOOBAR: "{{.FOO}}{{.BAR}}"
+  FOOBARBAZ: "{{.FOOBAR}}{{.BAZ}}"
+
+tasks:
+  default:
+    cmds:
+      - echo "{{.FOOBARBAZ}}"
+```
+
+## Version 2.1
+
+Version 2.1 includes a global `output` option, to allow having more control
+over how commands output are printed to the console
+(see [documentation][output] for more info):
+
+```yaml
+version: '2'
+
+output: prefixed
+
+tasks:
+  server:
+    cmds:
+      - go run main.go
+  prefix: server
+```
+
+From this version it's not also possible to ignore errors of a command or task
+(check documentation [here][ignore_errors]):
+
+```yaml
+version: '2'
+
+tasks:
+  example-1:
+    cmds:
+      - cmd: exit 1
+        ignore_error: true
+      - echo "This will be print"
+
+  example-2:
+    cmds:
+      - exit 1
+      - echo "This will be print"
+    ignore_error: true
+```
+
+## Version 2.2
+
+Version 2.2 comes with a global `includes` options to include other
+Taskfiles:
+
+```yaml
+version: '2'
+
+includes:
+  docs: ./documentation # will look for ./documentation/Taskfile.yml
+  docker: ./DockerTasks.yml
+```
+
+## Version 2.6
+
+Version 2.6 comes with `preconditions` stanza in tasks.
+
+```yaml
+version: '2'
+
+tasks:
+  upload_environment:
+    preconditions:
+      - test -f .env
+    cmds:
+      - aws s3 cp .env s3://myenvironment
+```
+
+Please check the [documentation][includes]
+
+[output]: usage.md#output-syntax
+[ignore_errors]: usage.md#ignore-errors
+[includes]: usage.md#including-other-taskfiles

docs/usage.md

@@ -0,0 +1,822 @@
+# Usage
+
+## Getting started
+
+Create a file called `Taskfile.yml` in the root of your project.
+The `cmds` attribute should contain the commands of a task.
+The example below allows compiling a Go app and uses [Minify][minify] to concat
+and minify multiple CSS files into a single one.
+
+```yaml
+version: '2'
+
+tasks:
+  build:
+    cmds:
+      - go build -v -i main.go
+
+  assets:
+    cmds:
+      - minify -o public/style.css src/css
+```
+
+Running the tasks is as simple as running:
+
+```bash
+task assets build
+```
+
+Task uses [github.com/mvdan/sh](https://github.com/mvdan/sh), a native Go sh
+interpreter. So you can write sh/bash commands and it will work even on
+Windows, where `sh` or `bash` are usually not available. Just remember any
+executable called must be available by the OS or in PATH.
+
+If you omit a task name, "default" will be assumed.
+
+## Environment
+
+You can use `env` to set custom environment variables for a specific task:
+
+```yaml
+version: '2'
+
+tasks:
+  greet:
+    cmds:
+      - echo $GREETING
+    env:
+      GREETING: Hey, there!
+```
+
+Additionally, you can set globally environment variables, that'll be available
+to all tasks:
+
+```yaml
+version: '2'
+
+env:
+  GREETING: Hey, there!
+
+tasks:
+  greet:
+    cmds:
+      - echo $GREETING
+```
+
+> NOTE: `env` supports expansion and and retrieving output from a shell command
+> just like variables, as you can see on the [Variables](#variables) section.
+
+## Operating System specific tasks
+
+If you add a `Taskfile_{{GOOS}}.yml` you can override or amend your Taskfile
+based on the operating system.
+
+Example:
+
+Taskfile.yml:
+
+```yaml
+version: '2'
+
+tasks:
+  build:
+    cmds:
+      - echo "default"
+```
+
+Taskfile_linux.yml:
+
+```yaml
+version: '2'
+
+tasks:
+  build:
+    cmds:
+      - echo "linux"
+```
+
+Will print out `linux` and not `default`.
+
+Keep in mind that the version of the files should match. Also, when redefining
+a task the whole task is replaced, properties of the task are not merged.
+
+It's also possible to have an OS specific `Taskvars.yml` file, like
+`Taskvars_windows.yml`, `Taskvars_linux.yml`, or `Taskvars_darwin.yml`. See the
+[variables section](#variables) below.
+
+## Including other Taskfiles
+
+> This feature is still experimental and may have bugs.
+
+If you want to share tasks between different projects (Taskfiles), you can use
+the importing mechanism to include other Taskfiles using the `includes` keyword:
+
+```yaml
+version: '2'
+
+includes:
+  docs: ./documentation # will look for ./documentation/Taskfile.yml
+  docker: ./DockerTasks.yml
+```
+
+The tasks described in the given Taskfiles will be available with the informed
+namespace. So, you'd call `task docs:serve` to run the `serve` task from
+`documentation/Taskfile.yml` or `task docker:build` to run the `build` task
+from the `DockerTasks.yml` file.
+
+> The included Taskfiles must be using the same schema version the main
+> Taskfile uses.
+
+> Also, for now included Taskfiles can't include other Taskfiles.
+> This was a deliberate decision to keep use and implementation simple.
+> If you disagree, open an GitHub issue and explain your use case. =)
+
+## Task directory
+
+By default, tasks will be executed in the directory where the Taskfile is
+located. But you can easily make the task run in another folder informing
+`dir`:
+
+```yaml
+version: '2'
+
+tasks:
+  serve:
+    dir: public/www
+    cmds:
+      # run http server
+      - caddy
+```
+
+If the directory doesn't exist, `task` creates it.
+
+## Task dependencies
+
+You may have tasks that depend on others. Just pointing them on `deps` will
+make them run automatically before running the parent task:
+
+```yaml
+version: '2'
+
+tasks:
+  build:
+    deps: [assets]
+    cmds:
+      - go build -v -i main.go
+
+  assets:
+    cmds:
+      - minify -o public/style.css src/css
+```
+
+In the above example, `assets` will always run right before `build` if you run
+`task build`.
+
+A task can have only dependencies and no commands to group tasks together:
+
+```yaml
+version: '2'
+
+tasks:
+  assets:
+    deps: [js, css]
+
+  js:
+    cmds:
+      - minify -o public/script.js src/js
+
+  css:
+    cmds:
+      - minify -o public/style.css src/css
+```
+
+If there is more than one dependency, they always run in parallel for better
+performance.
+
+If you want to pass information to dependencies, you can do that the same
+manner as you would to [call another task](#calling-another-task):
+
+```yaml
+version: '2'
+
+tasks:
+  default:
+    deps:
+      - task: echo_sth
+        vars: {TEXT: "before 1"}
+      - task: echo_sth
+        vars: {TEXT: "before 2"}
+    cmds:
+      - echo "after"
+
+  echo_sth:
+    cmds:
+      - echo {{.TEXT}}
+```
+
+## Calling another task
+
+When a task has many dependencies, they are executed concurrently. This will
+often result in a faster build pipeline. But in some situations you may need
+to call other tasks serially. In this case, just use the following syntax:
+
+```yaml
+version: '2'
+
+tasks:
+  main-task:
+    cmds:
+      - task: task-to-be-called
+      - task: another-task
+      - echo "Both done"
+
+  task-to-be-called:
+    cmds:
+      - echo "Task to be called"
+
+  another-task:
+    cmds:
+      - echo "Another task"
+```
+
+Overriding variables in the called task is as simple as informing `vars`
+attribute:
+
+```yaml
+version: '2'
+
+tasks:
+  main-task:
+    cmds:
+      - task: write-file
+        vars: {FILE: "hello.txt", CONTENT: "Hello!"}
+      - task: write-file
+        vars: {FILE: "world.txt", CONTENT: "World!"}
+
+  write-file:
+    cmds:
+      - echo "{{.CONTENT}}" > {{.FILE}}
+```
+
+The above syntax is also supported in `deps`.
+
+> NOTE: If you want to call a task declared in the root Taskfile from within an
+> [included Taskfile](#including-other-taskfiles), add a leading `:` like this:
+> `task: :task-name`.
+
+## Prevent unnecessary work
+
+If a task generates something, you can inform Task the source and generated
+files, so Task will prevent to run them if not necessary.
+
+```yaml
+version: '2'
+
+tasks:
+  build:
+    deps: [js, css]
+    cmds:
+      - go build -v -i main.go
+
+  js:
+    cmds:
+      - minify -o public/script.js src/js
+    sources:
+      - src/js/**/*.js
+    generates:
+      - public/script.js
+
+  css:
+    cmds:
+      - minify -o public/style.css src/css
+    sources:
+      - src/css/**/*.css
+    generates:
+      - public/style.css
+```
+
+`sources` and `generates` can be files or file patterns. When both are given,
+Task will compare the modification date/time of the files to determine if it's
+necessary to run the task. If not, it will just print a message like
+`Task "js" is up to date`.
+
+If you prefer this check to be made by the content of the files, instead of
+its timestamp, just set the `method` property to `checksum`.
+You will probably want to ignore the `.task` folder in your `.gitignore` file
+(It's there that Task stores the last checksum).
+
+```yaml
+version: '2'
+
+tasks:
+  build:
+    cmds:
+      - go build .
+    sources:
+      - ./*.go
+    generates:
+      - app{{exeExt}}
+    method: checksum
+```
+
+> TIP: method `none` skips any validation and always run the task.
+
+Alternatively, you can inform a sequence of tests as `status`. If no error
+is returned (exit status 0), the task is considered up-to-date:
+
+```yaml
+version: '2'
+
+tasks:
+  generate-files:
+    cmds:
+      - mkdir directory
+      - touch directory/file1.txt
+      - touch directory/file2.txt
+    # test existence of files
+    status:
+      - test -d directory
+      - test -f directory/file1.txt
+      - test -f directory/file2.txt
+```
+
+You can use `--force` or `-f` if you want to force a task to run even when
+up-to-date.
+
+Also, `task --status [tasks]...` will exit with a non-zero exit code if any of
+the tasks are not up-to-date.
+
+If you need a certain set of conditions to be _true_ you can use the
+`preconditions` stanza.  `preconditions` are very similar to `status`
+lines except they support `sh` expansion and they SHOULD all return 0.
+
+```yaml
+version: '2'
+
+tasks:
+  generate-files:
+    cmds:
+      - mkdir directory
+      - touch directory/file1.txt
+      - touch directory/file2.txt
+    # test existence of files
+    preconditions:
+      - test -f .env
+      - sh: "[ 1 = 0 ]"
+        msg: "One doesn't equal Zero, Halting"
+```
+
+Preconditions can set specific failure messages that can tell
+a user what steps to take using the `msg` field.
+
+If a task has a dependency on a sub-task with a precondition, and that
+precondition is not met - the calling task will fail.  Note that a task
+executed with a failing precondition will not run unless `--force` is
+given.
+
+Unlike `status` which will skip a task if it is up to date, and continue
+executing tasks that depend on it, a `precondition` will fail a task, along
+with any other tasks that depend on it.
+
+```yaml
+version: '2'
+tasks:
+  task_will_fail:
+    preconditions:
+      - sh: "exit 1"
+
+  task_will_also_fail:
+    deps:
+      - task_will_fail
+
+  task_will_still_fail:
+    cmds:
+      - task: task_will_fail
+      - echo "I will not run"
+```
+
+## Variables
+
+When doing interpolation of variables, Task will look for the below.
+They are listed below in order of importance (e.g. most important first):
+
+- Variables declared locally in the task
+- Variables given while calling a task from another.
+  (See [Calling another task](#calling-another-task) above)
+- Variables declared in the `vars:` option in the `Taskfile`
+- Variables available in the `Taskvars.yml` file
+- Environment variables
+
+Example of sending parameters with environment variables:
+
+```bash
+$ TASK_VARIABLE=a-value task do-something
+```
+
+Since some shells don't support above syntax to set environment variables
+(Windows) tasks also accepts a similar style when not in the beginning of
+the command. Variables given in this form are only visible to the task called
+right before.
+
+```bash
+$ task write-file FILE=file.txt "CONTENT=Hello, World!" print "MESSAGE=All done!"
+```
+
+If you want to set global variables using this syntax, give it before any task:
+
+```bash
+$ task OUTPUT=file.txt generate-file
+```
+
+Example of locally declared vars:
+
+```yaml
+version: '2'
+
+tasks:
+  print-var:
+    cmds:
+      - echo "{{.VAR}}"
+    vars:
+      VAR: Hello!
+```
+
+Example of global vars in a `Taskfile.yml`:
+
+```yaml
+version: '2'
+
+vars:
+  GREETING: Hello from Taskfile!
+
+tasks:
+  greet:
+    cmds:
+      - echo "{{.GREETING}}"
+```
+
+Example of `Taskvars.yml` file:
+
+```yaml
+PROJECT_NAME: My Project
+DEV_MODE: production
+GIT_COMMIT: {sh: git log -n 1 --format=%h}
+```
+
+### Variables expansion
+
+Variables are expanded 2 times by default. You can change that by setting the
+`expansions:` option. Change that will be necessary if you compose many
+variables together:
+
+```yaml
+version: '2'
+
+expansions: 3
+
+vars:
+  FOO: foo
+  BAR: bar
+  BAZ: baz
+  FOOBAR: "{{.FOO}}{{.BAR}}"
+  FOOBARBAZ: "{{.FOOBAR}}{{.BAZ}}"
+
+tasks:
+  default:
+    cmds:
+      - echo "{{.FOOBARBAZ}}"
+```
+
+### Dynamic variables
+
+The below syntax (`sh:` prop in a variable) is considered a dynamic variable.
+The value will be treated as a command and the output assigned. If there is one
+or more trailing newlines, the last newline will be trimmed.
+
+```yaml
+version: '2'
+
+tasks:
+  build:
+    cmds:
+      - go build -ldflags="-X main.Version={{.GIT_COMMIT}}" main.go
+    vars:
+      GIT_COMMIT:
+        sh: git log -n 1 --format=%h
+```
+
+This works for all types of variables.
+
+## Go's template engine
+
+Task parse commands as [Go's template engine][gotemplate] before executing
+them. Variables are accessible through dot syntax (`.VARNAME`).
+
+All functions by the Go's [sprig lib](http://masterminds.github.io/sprig/)
+are available. The following example gets the current date in a given format:
+
+```yaml
+version: '2'
+
+tasks:
+  print-date:
+    cmds:
+      - echo {{now | date "2006-01-02"}}
+```
+
+Task also adds the following functions:
+
+- `OS`: Returns operating system. Possible values are "windows", "linux",
+  "darwin" (macOS) and "freebsd".
+- `ARCH`: return the architecture Task was compiled to: "386", "amd64", "arm"
+  or "s390x".
+- `splitLines`: Splits Unix (\n) and Windows (\r\n) styled newlines.
+- `catLines`: Replaces Unix (\n) and Windows (\r\n) styled newlines with a space.
+- `toSlash`: Does nothing on Unix, but on Windows converts a string from `\`
+  path format to `/`.
+- `fromSlash`: Opposite of `toSlash`. Does nothing on Unix, but on Windows
+  converts a string from `\` path format to `/`.
+- `exeExt`: Returns the right executable extension for the current OS
+  (`".exe"` for Windows, `""` for others).
+
+Example:
+
+```yaml
+version: '2'
+
+tasks:
+  print-os:
+    cmds:
+      - echo '{{OS}} {{ARCH}}'
+      - echo '{{if eq OS "windows"}}windows-command{{else}}unix-command{{end}}'
+      # This will be path/to/file on Unix but path\to\file on Windows
+      - echo '{{fromSlash "path/to/file"}}'
+  enumerated-file:
+    vars:
+      CONTENT: |
+        foo
+        bar
+    cmds:
+      - |
+        cat << EOF > output.txt
+        {{range $i, $line := .CONTENT | splitLines -}}
+        {{printf "%3d" $i}}: {{$line}}
+        {{end}}EOF
+```
+
+## Help
+
+Running `task --list` (or `task -l`) lists all tasks with a description.
+The following Taskfile:
+
+```yaml
+version: '2'
+
+tasks:
+  build:
+    desc: Build the go binary.
+    cmds:
+      - go build -v -i main.go
+
+  test:
+    desc: Run all the go tests.
+    cmds:
+      - go test -race ./...
+
+  js:
+    cmds:
+      - minify -o public/script.js src/js
+
+  css:
+    cmds:
+      - minify -o public/style.css src/css
+```
+
+would print the following output:
+
+```bash
+* build:   Build the go binary.
+* test:    Run all the go tests.
+```
+
+## Display summary of task
+
+Running `task --summary task-name` will show a summary of a task
+The following Taskfile:
+
+```yaml
+version: '2'
+
+tasks:
+  release:
+    deps: [build]
+    summary: |
+      Release your project to github
+
+      It will build your project before starting the release it.
+      Please make sure that you have set GITHUB_TOKEN before starting.
+    cmds:
+      - your-release-tool
+
+  build:
+    cmds:
+      - your-build-tool
+```
+
+with running ``task --summary release`` would print the following output:
+
+```
+task: release
+
+Release your project to github
+
+It will build your project before starting the release it.
+Please make sure that you have set GITHUB_TOKEN before starting.
+
+dependencies:
+ - build
+
+commands:
+ - your-release-tool
+```
+If a summary is missing, the description will be printed.
+If the task does not have a summary or a description, a warning is printed.
+
+Please note: *showing the summary will not execute the command*.
+
+## Silent mode
+
+Silent mode disables echoing of commands before Task runs it.
+For the following Taskfile:
+
+```yaml
+version: '2'
+
+tasks:
+  echo:
+    cmds:
+      - echo "Print something"
+```
+
+Normally this will be print:
+
+```sh
+echo "Print something"
+Print something
+```
+
+With silent mode on, the below will be print instead:
+
+```sh
+Print something
+```
+
+There's three ways to enable silent mode:
+
+* At command level:
+
+```yaml
+version: '2'
+
+tasks:
+  echo:
+    cmds:
+      - cmd: echo "Print something"
+        silent: true
+```
+
+* At task level:
+
+```yaml
+version: '2'
+
+tasks:
+  echo:
+    cmds:
+      - echo "Print something"
+    silent: true
+```
+
+* Or globally with `--silent` or `-s` flag
+
+If you want to suppress STDOUT instead, just redirect a command to `/dev/null`:
+
+```yaml
+version: '2'
+
+tasks:
+  echo:
+    cmds:
+      - echo "This will print nothing" > /dev/null
+```
+
+## Dry run mode
+
+Dry run mode (`--dry`) compiles and steps through each task, printing the commands
+that would be run without executing them. This is useful for debugging your Taskfiles.
+
+## Ignore errors
+
+You have the option to ignore errors during command execution.
+Given the following Taskfile:
+
+```yaml
+version: '2'
+
+tasks:
+  echo:
+    cmds:
+      - exit 1
+      - echo "Hello World"
+```
+
+Task will abort the execution after running `exit 1` because the status code `1` stands for `EXIT_FAILURE`.
+However it is possible to continue with execution using `ignore_error`:
+
+```yaml
+version: '2'
+
+tasks:
+  echo:
+    cmds:
+      - cmd: exit 1
+        ignore_error: true
+      - echo "Hello World"
+```
+
+`ignore_error` can also be set for a task, which mean errors will be suppressed
+for all commands. But keep in mind this option won't propagate to other tasks
+called either by `deps` or `cmds`!
+
+## Output syntax
+
+By default, Task just redirect the STDOUT and STDERR of the running commands
+to the shell in real time. This is good for having live feedback for log
+printed by commands, but the output can become messy if you have multiple
+commands running at the same time and printing lots of stuff.
+
+To make this more customizable, there are currently three different output
+options you can choose:
+
+- `interleaved` (default)
+- `group`
+- `prefixed`
+
+To choose another one, just set it to root in the Taskfile:
+
+```yaml
+version: '2'
+
+output: 'group'
+
+tasks:
+  # ...
+```
+
+ The `group` output will print the entire output of a command once, after it
+ finishes, so you won't have live feedback for commands that take a long time
+ to run.
+
+ The `prefix` output will prefix every line printed by a command with
+ `[task-name] ` as the prefix, but you can customize the prefix for a command
+ with the `prefix:` attribute:
+
+ ```yaml
+version: '2'
+
+output: prefixed
+
+tasks:
+  default:
+    deps:
+      - task: print
+        vars: {TEXT: foo}
+      - task: print
+        vars: {TEXT: bar}
+      - task: print
+        vars: {TEXT: baz}
+
+  print:
+    cmds:
+      - echo "{{.TEXT}}"
+    prefix: "print-{{.TEXT}}"
+    silent: true
+```
+
+```bash
+$ task default
+[print-foo] foo
+[print-bar] bar
+[print-baz] baz
+```
+
+> The `output` option can also be specified by the `--output` or `-o` flags.
+
+## Watch tasks
+
+If you give a `--watch` or `-w` argument, task will watch for file changes
+and run the task again. This requires the `sources` attribute to be given,
+so task know which files to watch.
+
+[gotemplate]: https://golang.org/pkg/text/template/
+[minify]: https://github.com/tdewolff/minify/tree/master/cmd/minify

errors.go

@@ -10,14 +10,6 @@ var (
 	ErrTaskfileAlreadyExists = errors.New("task: A Taskfile already exists")
 )
 
-type taskFileNotFound struct {
-	taskFile string
-}
-
-func (err taskFileNotFound) Error() string {
-	return fmt.Sprintf(`task: No task file found (is it named "%s"?). Use "task --init" to create a new one`, err.taskFile)
-}
-
 type taskNotFoundError struct {
 	taskName string
 }
@@ -35,31 +27,6 @@ func (err *taskRunError) Error() string {
 	return fmt.Sprintf(`task: Failed to run task "%s": %v`, err.taskName, err.err)
 }
 
-type cyclicDepError struct {
-	taskName string
-}
-
-func (err *cyclicDepError) Error() string {
-	return fmt.Sprintf(`task: Cyclic dependency of task "%s" detected`, err.taskName)
-}
-
-type cantWatchNoSourcesError struct {
-	taskName string
-}
-
-func (err *cantWatchNoSourcesError) Error() string {
-	return fmt.Sprintf(`task: Can't watch task "%s" because it has no specified sources`, err.taskName)
-}
-
-type dynamicVarError struct {
-	cause error
-	cmd   string
-}
-
-func (err *dynamicVarError) Error() string {
-	return fmt.Sprintf(`task: Command "%s" in taskvars file failed: %s`, err.cmd, err.cause)
-}
-
 // MaximumTaskCallExceededError is returned when a task is called too
 // many times. In this case you probably have a cyclic dependendy or
 // infinite loop

go.mod

@@ -0,0 +1,23 @@
+module github.com/go-task/task/v2
+
+require (
+	github.com/Masterminds/semver v1.4.2 // indirect
+	github.com/Masterminds/sprig v2.16.0+incompatible
+	github.com/aokoli/goutils v1.0.1 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/google/uuid v1.0.0 // indirect
+	github.com/huandu/xstrings v1.1.0 // indirect
+	github.com/imdario/mergo v0.3.6 // indirect
+	github.com/kr/pretty v0.1.0 // indirect
+	github.com/mattn/go-zglob v0.0.1
+	github.com/mitchellh/go-homedir v1.0.0
+	github.com/radovskyb/watcher v1.0.5
+	github.com/spf13/pflag v1.0.3
+	github.com/stretchr/testify v1.3.0
+	golang.org/x/crypto v0.0.0-20180830192347-182538f80094 // indirect
+	golang.org/x/net v0.0.0-20180826012351-8a410e7b638d // indirect
+	golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f
+	golang.org/x/sys v0.0.0-20180831094639-fa5fdf94c789 // indirect
+	gopkg.in/yaml.v2 v2.2.1
+	mvdan.cc/sh v2.6.4+incompatible
+)

go.sum

@@ -0,0 +1,47 @@
+github.com/Masterminds/semver v1.4.2 h1:WBLTQ37jOCzSLtXNdoo8bNM8876KhNqOKvrlGITgsTc=
+github.com/Masterminds/semver v1.4.2/go.mod h1:MB6lktGJrhw8PrUyiEoblNEGEQ+RzHPF078ddwwvV3Y=
+github.com/Masterminds/sprig v2.16.0+incompatible h1:QZbMUPxRQ50EKAq3LFMnxddMu88/EUUG3qmxwtDmPsY=
+github.com/Masterminds/sprig v2.16.0+incompatible/go.mod h1:y6hNFY5UBTIWBxnzTeuNhlNS5hqE0NB0E6fgfo2Br3o=
+github.com/aokoli/goutils v1.0.1 h1:7fpzNGoJ3VA8qcrm++XEE1QUe0mIwNeLa02Nwq7RDkg=
+github.com/aokoli/goutils v1.0.1/go.mod h1:SijmP0QR8LtwsmDs8Yii5Z/S4trXFGFC2oO5g9DP+DQ=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/google/uuid v1.0.0 h1:b4Gk+7WdP/d3HZH8EJsZpvV7EtDOgaZLtnaNGIu1adA=
+github.com/google/uuid v1.0.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/huandu/xstrings v1.1.0 h1:9oZY6Z/H3A1gytJxzuicbmV5QoR8M1TAPcn9WTg7vqg=
+github.com/huandu/xstrings v1.1.0/go.mod h1:DvyZB1rfVYsBIigL8HwpZgxHwXozlTgGqn63UyNX5k4=
+github.com/imdario/mergo v0.3.6 h1:xTNEAn+kxVO7dTZGu0CegyqKZmoWFI0rF8UxjlB2d28=
+github.com/imdario/mergo v0.3.6/go.mod h1:2EnlNZ0deacrJVfApfmtdGgDfMuh/nq6Ok1EcJh5FfA=
+github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
+github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
+github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
+github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
+github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
+github.com/mattn/go-zglob v0.0.1 h1:xsEx/XUoVlI6yXjqBK062zYhRTZltCNmYPx6v+8DNaY=
+github.com/mattn/go-zglob v0.0.1/go.mod h1:9fxibJccNxU2cnpIKLRRFA7zX7qhkJIQWBb449FYHOo=
+github.com/mitchellh/go-homedir v1.0.0 h1:vKb8ShqSby24Yrqr/yDYkuFz8d0WUjys40rvnGC8aR0=
+github.com/mitchellh/go-homedir v1.0.0/go.mod h1:SfyaCUpYCn1Vlf4IUYiD9fPX4A5wJrkLzIz1N1q0pr0=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/radovskyb/watcher v1.0.5 h1:wqt7gb+HjGacvFoLTKeT44C+XVPxu7bvHvKT1IvZ7rw=
+github.com/radovskyb/watcher v1.0.5/go.mod h1:78okwvY5wPdzcb1UYnip1pvrZNIVEIh/Cm+ZuvsUYIg=
+github.com/spf13/pflag v1.0.3 h1:zPAT6CGy6wXeQ7NtTnaTerfKOsV6V6F8agHXFiazDkg=
+github.com/spf13/pflag v1.0.3/go.mod h1:DYY7MBk1bdzusC3SYhjObp+wFpr4gzcvqqNjLnInEg4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q=
+github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
+golang.org/x/crypto v0.0.0-20180830192347-182538f80094 h1:rVTAlhYa4+lCfNxmAIEOGQRoD23UqP72M3+rSWVGDTg=
+golang.org/x/crypto v0.0.0-20180830192347-182538f80094/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
+golang.org/x/net v0.0.0-20180826012351-8a410e7b638d h1:g9qWBGx4puODJTMVyoPrpoxPFgVGd+z1DZwjfRu4d0I=
+golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f h1:wMNYb4v58l5UBM7MYRLPG6ZhfOqbKu7X5eyFl8ZhKvA=
+golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sys v0.0.0-20180831094639-fa5fdf94c789 h1:T8D7l6WB3tLu+VpKvw06ieD/OhBi1XpJmG1U/FtttZg=
+golang.org/x/sys v0.0.0-20180831094639-fa5fdf94c789/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.1 h1:mUhvW9EsL+naU5Q3cakzfE91YhliOondGd6ZrsDBHQE=
+gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+mvdan.cc/sh v2.6.4+incompatible h1:eD6tDeh0pw+/TOTI1BBEryZ02rD2nMcFsgcvde7jffM=
+mvdan.cc/sh v2.6.4+incompatible/go.mod h1:IeeQbZq+x2SUGBensq/jge5lLQbS3XT2ktyp3wrt4x8=

help.go

@@ -4,31 +4,34 @@ import (
 	"fmt"
 	"sort"
 	"text/tabwriter"
+
+	"github.com/go-task/task/v2/internal/taskfile"
 )
 
 // PrintTasksHelp prints help os tasks that have a description
 func (e *Executor) PrintTasksHelp() {
 	tasks := e.tasksWithDesc()
 	if len(tasks) == 0 {
-		e.outf("task: No tasks with description available")
+		e.Logger.Outf("task: No tasks with description available")
 		return
 	}
-	e.outf("task: Available tasks for this project:")
+	e.Logger.Outf("task: Available tasks for this project:")
 
 	// Format in tab-separated columns with a tab stop of 8.
 	w := tabwriter.NewWriter(e.Stdout, 0, 8, 0, '\t', 0)
 	for _, task := range tasks {
-		fmt.Fprintln(w, fmt.Sprintf("* %s: \t%s", task, e.Tasks[task].Desc))
+		fmt.Fprintf(w, "* %s: \t%s\n", task.Task, task.Desc)
 	}
 	w.Flush()
 }
 
-func (e *Executor) tasksWithDesc() (tasks []string) {
-	for name, task := range e.Tasks {
+func (e *Executor) tasksWithDesc() (tasks []*taskfile.Task) {
+	tasks = make([]*taskfile.Task, 0, len(e.Taskfile.Tasks))
+	for _, task := range e.Taskfile.Tasks {
 		if task.Desc != "" {
-			tasks = append(tasks, name)
+			tasks = append(tasks, task)
 		}
 	}
-	sort.Strings(tasks)
+	sort.Slice(tasks, func(i, j int) bool { return tasks[i].Task < tasks[j].Task })
 	return
 }

init.go

@@ -8,24 +8,29 @@ import (
 	"path/filepath"
 )
 
-const defaultTaskfile = `# github.com/go-task/task
+const defaultTaskfile = `# https://taskfile.dev
 
-default:
-  cmds:
-    - echo "Hello, World!"
+version: '2'
+
+vars:
+  GREETING: Hello, World!
+
+tasks:
+  default:
+    cmds:
+      - echo "{{.GREETING}}"
+    silent: true
 `
 
 // InitTaskfile Taskfile creates a new Taskfile
-func InitTaskfile(w io.Writer, path string) error {
-	for _, f := range []string{"Taskfile.yml", "Taskfile.toml", "Taskfile.json"} {
-		f = filepath.Join(path, f)
-		if _, err := os.Stat(f); err == nil {
-			return ErrTaskfileAlreadyExists
-		}
+func InitTaskfile(w io.Writer, dir string) error {
+	f := filepath.Join(dir, "Taskfile.yml")
+
+	if _, err := os.Stat(f); err == nil {
+		return ErrTaskfileAlreadyExists
 	}
 
-	f := filepath.Join(path, "Taskfile.yml")
-	if err := ioutil.WriteFile(f, []byte(defaultTaskfile), 0666); err != nil {
+	if err := ioutil.WriteFile(f, []byte(defaultTaskfile), 0644); err != nil {
 		return err
 	}
 	fmt.Fprintf(w, "Taskfile.yml created in the current directory\n")

install-task.sh

@@ -0,0 +1,390 @@
+#!/bin/sh
+set -e
+# Code generated by godownloader on 2018-04-07T17:47:38Z. DO NOT EDIT.
+#
+
+usage() {
+  this=$1
+  cat <<EOF
+$this: download go binaries for go-task/task
+
+Usage: $this [-b] bindir [-d] [tag]
+  -b sets bindir or installation directory, Defaults to ./bin
+  -d turns on debug logging
+   [tag] is a tag from
+   https://github.com/go-task/task/releases
+   If tag is missing, then the latest will be used.
+
+ Generated by godownloader
+  https://github.com/goreleaser/godownloader
+
+EOF
+  exit 2
+}
+
+parse_args() {
+  #BINDIR is ./bin unless set be ENV
+  # over-ridden by flag below
+
+  BINDIR=${BINDIR:-./bin}
+  while getopts "b:dh?" arg; do
+    case "$arg" in
+      b) BINDIR="$OPTARG" ;;
+      d) log_set_priority 10 ;;
+      h | \?) usage "$0" ;;
+    esac
+  done
+  shift $((OPTIND - 1))
+  TAG=$1
+}
+# this function wraps all the destructive operations
+# if a curl|bash cuts off the end of the script due to
+# network, either nothing will happen or will syntax error
+# out preventing half-done work
+execute() {
+  tmpdir=$(mktmpdir)
+  log_debug "downloading files into ${tmpdir}"
+  http_download "${tmpdir}/${TARBALL}" "${TARBALL_URL}"
+  http_download "${tmpdir}/${CHECKSUM}" "${CHECKSUM_URL}"
+  hash_sha256_verify "${tmpdir}/${TARBALL}" "${tmpdir}/${CHECKSUM}"
+  srcdir="${tmpdir}"
+  (cd "${tmpdir}" && untar "${TARBALL}")
+  install -d "${BINDIR}"
+  for binexe in "task" ; do
+    if [ "$OS" = "windows" ]; then
+      binexe="${binexe}.exe"
+    fi
+    install "${srcdir}/${binexe}" "${BINDIR}/"
+    log_info "installed ${BINDIR}/${binexe}"
+  done
+}
+is_supported_platform() {
+  platform=$1
+  found=1
+  case "$platform" in
+    windows/386) found=0 ;;
+    windows/amd64) found=0 ;;
+    darwin/386) found=0 ;;
+    darwin/amd64) found=0 ;;
+    linux/386) found=0 ;;
+    linux/amd64) found=0 ;;
+  esac
+  case "$platform" in
+    darwin/386) found=1 ;;
+  esac
+  return $found
+}
+check_platform() {
+  if is_supported_platform "$PLATFORM"; then
+    # optional logging goes here
+    true
+  else
+    log_crit "platform $PLATFORM is not supported.  Make sure this script is up-to-date and file request at https://github.com/${PREFIX}/issues/new"
+    exit 1
+  fi
+}
+tag_to_version() {
+  if [ -z "${TAG}" ]; then
+    log_info "checking GitHub for latest tag"
+  else
+    log_info "checking GitHub for tag '${TAG}'"
+  fi
+  REALTAG=$(github_release "$OWNER/$REPO" "${TAG}") && true
+  if test -z "$REALTAG"; then
+    log_crit "unable to find '${TAG}' - use 'latest' or see https://github.com/${PREFIX}/releases for details"
+    exit 1
+  fi
+  # if version starts with 'v', remove it
+  TAG="$REALTAG"
+  VERSION=${TAG#v}
+}
+adjust_format() {
+  # change format (tar.gz or zip) based on ARCH
+  case ${ARCH} in
+    windows) FORMAT=zip ;;
+  esac
+  true
+}
+adjust_os() {
+  # adjust archive name based on OS
+  true
+}
+adjust_arch() {
+  # adjust archive name based on ARCH
+  true
+}
+
+cat /dev/null <<EOF
+------------------------------------------------------------------------
+https://github.com/client9/shlib - portable posix shell functions
+Public domain - http://unlicense.org
+https://github.com/client9/shlib/blob/master/LICENSE.md
+but credit (and pull requests) appreciated.
+------------------------------------------------------------------------
+EOF
+is_command() {
+  command -v "$1" >/dev/null
+}
+echoerr() {
+  echo "$@" 1>&2
+}
+log_prefix() {
+  echo "$0"
+}
+_logp=6
+log_set_priority() {
+  _logp="$1"
+}
+log_priority() {
+  if test -z "$1"; then
+    echo "$_logp"
+    return
+  fi
+  [ "$1" -le "$_logp" ]
+}
+log_tag() {
+  case $1 in
+    0) echo "emerg" ;;
+    1) echo "alert" ;;
+    2) echo "crit" ;;
+    3) echo "err" ;;
+    4) echo "warning" ;;
+    5) echo "notice" ;;
+    6) echo "info" ;;
+    7) echo "debug" ;;
+    *) echo "$1" ;;
+  esac
+}
+log_debug() {
+  log_priority 7 || return 0
+  echoerr "$(log_prefix)" "$(log_tag 7)" "$@"
+}
+log_info() {
+  log_priority 6 || return 0
+  echoerr "$(log_prefix)" "$(log_tag 6)" "$@"
+}
+log_err() {
+  log_priority 3 || return 0
+  echoerr "$(log_prefix)" "$(log_tag 3)" "$@"
+}
+log_crit() {
+  log_priority 2 || return 0
+  echoerr "$(log_prefix)" "$(log_tag 2)" "$@"
+}
+uname_os() {
+  os=$(uname -s | tr '[:upper:]' '[:lower:]')
+  case "$os" in
+    msys_nt) os="windows" ;;
+  esac
+  echo "$os"
+}
+uname_arch() {
+  arch=$(uname -m)
+  case $arch in
+    x86_64) arch="amd64" ;;
+    x86) arch="386" ;;
+    i686) arch="386" ;;
+    i386) arch="386" ;;
+    aarch64) arch="arm64" ;;
+    armv5*) arch="arm5" ;;
+    armv6*) arch="arm6" ;;
+    armv7*) arch="arm7" ;;
+  esac
+  echo ${arch}
+}
+uname_os_check() {
+  os=$(uname_os)
+  case "$os" in
+    darwin) return 0 ;;
+    dragonfly) return 0 ;;
+    freebsd) return 0 ;;
+    linux) return 0 ;;
+    android) return 0 ;;
+    nacl) return 0 ;;
+    netbsd) return 0 ;;
+    openbsd) return 0 ;;
+    plan9) return 0 ;;
+    solaris) return 0 ;;
+    windows) return 0 ;;
+  esac
+  log_crit "uname_os_check '$(uname -s)' got converted to '$os' which is not a GOOS value. Please file bug at https://github.com/client9/shlib"
+  return 1
+}
+uname_arch_check() {
+  arch=$(uname_arch)
+  case "$arch" in
+    386) return 0 ;;
+    amd64) return 0 ;;
+    arm64) return 0 ;;
+    armv5) return 0 ;;
+    armv6) return 0 ;;
+    armv7) return 0 ;;
+    ppc64) return 0 ;;
+    ppc64le) return 0 ;;
+    mips) return 0 ;;
+    mipsle) return 0 ;;
+    mips64) return 0 ;;
+    mips64le) return 0 ;;
+    s390x) return 0 ;;
+    amd64p32) return 0 ;;
+  esac
+  log_crit "uname_arch_check '$(uname -m)' got converted to '$arch' which is not a GOARCH value.  Please file bug report at https://github.com/client9/shlib"
+  return 1
+}
+untar() {
+  tarball=$1
+  case "${tarball}" in
+    *.tar.gz | *.tgz) tar -xzf "${tarball}" ;;
+    *.tar) tar -xf "${tarball}" ;;
+    *.zip) unzip "${tarball}" ;;
+    *)
+      log_err "untar unknown archive format for ${tarball}"
+      return 1
+      ;;
+  esac
+}
+mktmpdir() {
+  test -z "$TMPDIR" && TMPDIR="$(mktemp -d)"
+  mkdir -p "${TMPDIR}"
+  echo "${TMPDIR}"
+}
+http_download_curl() {
+  local_file=$1
+  source_url=$2
+  header=$3
+  if [ -z "$header" ]; then
+    code=$(curl -w '%{http_code}' -sL -o "$local_file" "$source_url")
+  else
+    code=$(curl -w '%{http_code}' -sL -H "$header" -o "$local_file" "$source_url")
+  fi
+  if [ "$code" != "200" ]; then
+    log_debug "http_download_curl received HTTP status $code"
+    return 1
+  fi
+  return 0
+}
+http_download_wget() {
+  local_file=$1
+  source_url=$2
+  header=$3
+  if [ -z "$header" ]; then
+    wget -q -O "$local_file" "$source_url"
+  else
+    wget -q --header "$header" -O "$local_file" "$source_url"
+  fi
+}
+http_download() {
+  log_debug "http_download $2"
+  if is_command curl; then
+    http_download_curl "$@"
+    return
+  elif is_command wget; then
+    http_download_wget "$@"
+    return
+  fi
+  log_crit "http_download unable to find wget or curl"
+  return 1
+}
+http_copy() {
+  tmp=$(mktemp)
+  http_download "${tmp}" "$1" "$2" || return 1
+  body=$(cat "$tmp")
+  rm -f "${tmp}"
+  echo "$body"
+}
+github_release() {
+  owner_repo=$1
+  version=$2
+  test -z "$version" && version="latest"
+  giturl="https://github.com/${owner_repo}/releases/${version}"
+  json=$(http_copy "$giturl" "Accept:application/json")
+  test -z "$json" && return 1
+  version=$(echo "$json" | tr -s '\n' ' ' | sed 's/.*"tag_name":"//' | sed 's/".*//')
+  test -z "$version" && return 1
+  echo "$version"
+}
+hash_sha256() {
+  TARGET=${1:-/dev/stdin}
+  if is_command gsha256sum; then
+    hash=$(gsha256sum "$TARGET") || return 1
+    echo "$hash" | cut -d ' ' -f 1
+  elif is_command sha256sum; then
+    hash=$(sha256sum "$TARGET") || return 1
+    echo "$hash" | cut -d ' ' -f 1
+  elif is_command shasum; then
+    hash=$(shasum -a 256 "$TARGET" 2>/dev/null) || return 1
+    echo "$hash" | cut -d ' ' -f 1
+  elif is_command openssl; then
+    hash=$(openssl -dst openssl dgst -sha256 "$TARGET") || return 1
+    echo "$hash" | cut -d ' ' -f a
+  else
+    log_crit "hash_sha256 unable to find command to compute sha-256 hash"
+    return 1
+  fi
+}
+hash_sha256_verify() {
+  TARGET=$1
+  checksums=$2
+  if [ -z "$checksums" ]; then
+    log_err "hash_sha256_verify checksum file not specified in arg2"
+    return 1
+  fi
+  BASENAME=${TARGET##*/}
+  want=$(grep "${BASENAME}" "${checksums}" 2>/dev/null | tr '\t' ' ' | cut -d ' ' -f 1)
+  if [ -z "$want" ]; then
+    log_err "hash_sha256_verify unable to find checksum for '${TARGET}' in '${checksums}'"
+    return 1
+  fi
+  got=$(hash_sha256 "$TARGET")
+  if [ "$want" != "$got" ]; then
+    log_err "hash_sha256_verify checksum for '$TARGET' did not verify ${want} vs $got"
+    return 1
+  fi
+}
+cat /dev/null <<EOF
+------------------------------------------------------------------------
+End of functions from https://github.com/client9/shlib
+------------------------------------------------------------------------
+EOF
+
+PROJECT_NAME="task"
+OWNER=go-task
+REPO="task"
+BINARY=task
+FORMAT=tar.gz
+OS=$(uname_os)
+ARCH=$(uname_arch)
+PREFIX="$OWNER/$REPO"
+
+# use in logging routines
+log_prefix() {
+	echo "$PREFIX"
+}
+PLATFORM="${OS}/${ARCH}"
+GITHUB_DOWNLOAD=https://github.com/${OWNER}/${REPO}/releases/download
+
+uname_os_check "$OS"
+uname_arch_check "$ARCH"
+
+parse_args "$@"
+
+check_platform
+
+tag_to_version
+
+adjust_format
+
+adjust_os
+
+adjust_arch
+
+log_info "found version: ${VERSION} for ${TAG}/${OS}/${ARCH}"
+
+NAME=${BINARY}_${OS}_${ARCH}
+TARBALL=${NAME}.${FORMAT}
+TARBALL_URL=${GITHUB_DOWNLOAD}/${TAG}/${TARBALL}
+CHECKSUM=task_checksums.txt
+CHECKSUM_URL=${GITHUB_DOWNLOAD}/${TAG}/${CHECKSUM}
+
+
+execute

internal/args/args.go

@@ -1,36 +1,43 @@
 package args
 
 import (
-	"errors"
 	"strings"
 
-	"github.com/go-task/task"
-)
-
-var (
-	// ErrVariableWithoutTask is returned when variables are given before any task
-	ErrVariableWithoutTask = errors.New("task: variable given before any task")
+	"github.com/go-task/task/v2/internal/taskfile"
 )
 
 // Parse parses command line argument: tasks and vars of each task
-func Parse(args ...string) ([]task.Call, error) {
-	var calls []task.Call
+func Parse(args ...string) ([]taskfile.Call, taskfile.Vars) {
+	var calls []taskfile.Call
+	var globals taskfile.Vars
 
 	for _, arg := range args {
 		if !strings.Contains(arg, "=") {
-			calls = append(calls, task.Call{Task: arg})
+			calls = append(calls, taskfile.Call{Task: arg})
 			continue
 		}
+
 		if len(calls) < 1 {
-			return nil, ErrVariableWithoutTask
-		}
+			if globals == nil {
+				globals = taskfile.Vars{}
+			}
 
-		if calls[len(calls)-1].Vars == nil {
-			calls[len(calls)-1].Vars = make(task.Vars)
-		}
+			name, value := splitVar(arg)
+			globals[name] = taskfile.Var{Static: value}
+		} else {
+			if calls[len(calls)-1].Vars == nil {
+				calls[len(calls)-1].Vars = make(taskfile.Vars)
+			}
 
-		pair := strings.SplitN(arg, "=", 2)
-		calls[len(calls)-1].Vars[pair[0]] = task.Var{Static: pair[1]}
+			name, value := splitVar((arg))
+			calls[len(calls)-1].Vars[name] = taskfile.Var{Static: value}
+		}
 	}
-	return calls, nil
+
+	return calls, globals
+}
+
+func splitVar(s string) (string, string) {
+	pair := strings.SplitN(s, "=", 2)
+	return pair[0], pair[1]
 }

internal/args/args_test.go

@@ -4,21 +4,21 @@ import (
 	"fmt"
 	"testing"
 
-	"github.com/go-task/task"
-	"github.com/go-task/task/internal/args"
+	"github.com/go-task/task/v2/internal/args"
+	"github.com/go-task/task/v2/internal/taskfile"
 
 	"github.com/stretchr/testify/assert"
 )
 
 func TestArgs(t *testing.T) {
 	tests := []struct {
-		Args     []string
-		Expected []task.Call
-		Err      error
+		Args            []string
+		ExpectedCalls   []taskfile.Call
+		ExpectedGlobals taskfile.Vars
 	}{
 		{
 			Args: []string{"task-a", "task-b", "task-c"},
-			Expected: []task.Call{
+			ExpectedCalls: []taskfile.Call{
 				{Task: "task-a"},
 				{Task: "task-b"},
 				{Task: "task-c"},
@@ -26,45 +26,51 @@ func TestArgs(t *testing.T) {
 		},
 		{
 			Args: []string{"task-a", "FOO=bar", "task-b", "task-c", "BAR=baz", "BAZ=foo"},
-			Expected: []task.Call{
+			ExpectedCalls: []taskfile.Call{
 				{
 					Task: "task-a",
-					Vars: task.Vars{
-						"FOO": task.Var{Static: "bar"},
+					Vars: taskfile.Vars{
+						"FOO": taskfile.Var{Static: "bar"},
 					},
 				},
 				{Task: "task-b"},
 				{
 					Task: "task-c",
-					Vars: task.Vars{
-						"BAR": task.Var{Static: "baz"},
-						"BAZ": task.Var{Static: "foo"},
+					Vars: taskfile.Vars{
+						"BAR": taskfile.Var{Static: "baz"},
+						"BAZ": taskfile.Var{Static: "foo"},
 					},
 				},
 			},
 		},
 		{
 			Args: []string{"task-a", "CONTENT=with some spaces"},
-			Expected: []task.Call{
+			ExpectedCalls: []taskfile.Call{
 				{
 					Task: "task-a",
-					Vars: task.Vars{
-						"CONTENT": task.Var{Static: "with some spaces"},
+					Vars: taskfile.Vars{
+						"CONTENT": taskfile.Var{Static: "with some spaces"},
 					},
 				},
 			},
 		},
 		{
-			Args: []string{"FOO=bar", "task-a"},
-			Err:  args.ErrVariableWithoutTask,
+			Args: []string{"FOO=bar", "task-a", "task-b"},
+			ExpectedCalls: []taskfile.Call{
+				{Task: "task-a"},
+				{Task: "task-b"},
+			},
+			ExpectedGlobals: taskfile.Vars{
+				"FOO": {Static: "bar"},
+			},
 		},
 	}
 
 	for i, test := range tests {
 		t.Run(fmt.Sprintf("TestArgs%d", i+1), func(t *testing.T) {
-			calls, err := args.Parse(test.Args...)
-			assert.Equal(t, test.Err, err)
-			assert.Equal(t, test.Expected, calls)
+			calls, globals := args.Parse(test.Args...)
+			assert.Equal(t, test.ExpectedCalls, calls)
+			assert.Equal(t, test.ExpectedGlobals, globals)
 		})
 	}
 }

internal/compiler/compiler.go

@@ -0,0 +1,12 @@
+package compiler
+
+import (
+	"github.com/go-task/task/v2/internal/taskfile"
+)
+
+// Compiler handles compilation of a task before its execution.
+// E.g. variable merger, template processing, etc.
+type Compiler interface {
+	GetVariables(t *taskfile.Task, call taskfile.Call) (taskfile.Vars, error)
+	HandleDynamicVar(v taskfile.Var) (string, error)
+}

internal/compiler/env.go

@@ -0,0 +1,24 @@
+package compiler
+
+import (
+	"os"
+	"strings"
+
+	"github.com/go-task/task/v2/internal/taskfile"
+)
+
+// GetEnviron the all return all environment variables encapsulated on a
+// taskfile.Vars
+func GetEnviron() taskfile.Vars {
+	var (
+		env = os.Environ()
+		m   = make(taskfile.Vars, len(env))
+	)
+
+	for _, e := range env {
+		keyVal := strings.SplitN(e, "=", 2)
+		key, val := keyVal[0], keyVal[1]
+		m[key] = taskfile.Var{Static: val}
+	}
+	return m
+}

internal/compiler/v1/compiler_v1.go

@@ -0,0 +1,137 @@
+package v1
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"strings"
+	"sync"
+
+	"github.com/go-task/task/v2/internal/compiler"
+	"github.com/go-task/task/v2/internal/execext"
+	"github.com/go-task/task/v2/internal/logger"
+	"github.com/go-task/task/v2/internal/taskfile"
+	"github.com/go-task/task/v2/internal/templater"
+)
+
+var _ compiler.Compiler = &CompilerV1{}
+
+type CompilerV1 struct {
+	Dir  string
+	Vars taskfile.Vars
+
+	Logger *logger.Logger
+
+	dynamicCache   map[string]string
+	muDynamicCache sync.Mutex
+}
+
+// GetVariables returns fully resolved variables following the priority order:
+// 1. Call variables (should already have been resolved)
+// 2. Environment (should not need to be resolved)
+// 3. Task variables, resolved with access to:
+//    - call, taskvars and environment variables
+// 4. Taskvars variables, resolved with access to:
+//    - environment variables
+func (c *CompilerV1) GetVariables(t *taskfile.Task, call taskfile.Call) (taskfile.Vars, error) {
+	merge := func(dest taskfile.Vars, srcs ...taskfile.Vars) {
+		for _, src := range srcs {
+			for k, v := range src {
+				dest[k] = v
+			}
+		}
+	}
+	varsKeys := func(srcs ...taskfile.Vars) []string {
+		m := make(map[string]struct{})
+		for _, src := range srcs {
+			for k := range src {
+				m[k] = struct{}{}
+			}
+		}
+		lst := make([]string, 0, len(m))
+		for k := range m {
+			lst = append(lst, k)
+		}
+		return lst
+	}
+	replaceVars := func(dest taskfile.Vars, keys []string) error {
+		r := templater.Templater{Vars: dest}
+		for _, k := range keys {
+			v := dest[k]
+			dest[k] = taskfile.Var{
+				Static: r.Replace(v.Static),
+				Sh:     r.Replace(v.Sh),
+			}
+		}
+		return r.Err()
+	}
+	resolveShell := func(dest taskfile.Vars, keys []string) error {
+		for _, k := range keys {
+			v := dest[k]
+			static, err := c.HandleDynamicVar(v)
+			if err != nil {
+				return err
+			}
+			dest[k] = taskfile.Var{Static: static}
+		}
+		return nil
+	}
+	update := func(dest taskfile.Vars, srcs ...taskfile.Vars) error {
+		merge(dest, srcs...)
+		// updatedKeys ensures template evaluation is run only once.
+		updatedKeys := varsKeys(srcs...)
+		if err := replaceVars(dest, updatedKeys); err != nil {
+			return err
+		}
+		return resolveShell(dest, updatedKeys)
+	}
+
+	// Resolve taskvars variables to "result" with environment override variables.
+	override := compiler.GetEnviron()
+	result := make(taskfile.Vars, len(c.Vars)+len(t.Vars)+len(override))
+	if err := update(result, c.Vars, override); err != nil {
+		return nil, err
+	}
+	// Resolve task variables to "result" with environment and call override variables.
+	merge(override, call.Vars)
+	if err := update(result, t.Vars, override); err != nil {
+		return nil, err
+	}
+	return result, nil
+}
+
+func (c *CompilerV1) HandleDynamicVar(v taskfile.Var) (string, error) {
+	if v.Static != "" || v.Sh == "" {
+		return v.Static, nil
+	}
+
+	c.muDynamicCache.Lock()
+	defer c.muDynamicCache.Unlock()
+
+	if c.dynamicCache == nil {
+		c.dynamicCache = make(map[string]string, 30)
+	}
+	if result, ok := c.dynamicCache[v.Sh]; ok {
+		return result, nil
+	}
+
+	var stdout bytes.Buffer
+	opts := &execext.RunCommandOptions{
+		Command: v.Sh,
+		Dir:     c.Dir,
+		Stdout:  &stdout,
+		Stderr:  c.Logger.Stderr,
+	}
+	if err := execext.RunCommand(context.Background(), opts); err != nil {
+		return "", fmt.Errorf(`task: Command "%s" in taskvars file failed: %s`, opts.Command, err)
+	}
+
+	// Trim a single trailing newline from the result to make most command
+	// output easier to use in shell commands.
+	result := strings.TrimSuffix(stdout.String(), "\n")
+
+	c.dynamicCache[v.Sh] = result
+	c.Logger.VerboseErrf(`task: dynamic variable: '%s' result: '%s'`, v.Sh, result)
+
+	return result, nil
+}

internal/compiler/v2/compiler_v2.go

@@ -0,0 +1,109 @@
+package v2
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"strings"
+	"sync"
+
+	"github.com/go-task/task/v2/internal/compiler"
+	"github.com/go-task/task/v2/internal/execext"
+	"github.com/go-task/task/v2/internal/logger"
+	"github.com/go-task/task/v2/internal/taskfile"
+	"github.com/go-task/task/v2/internal/templater"
+)
+
+var _ compiler.Compiler = &CompilerV2{}
+
+type CompilerV2 struct {
+	Dir string
+
+	Taskvars     taskfile.Vars
+	TaskfileVars taskfile.Vars
+
+	Expansions int
+
+	Logger *logger.Logger
+
+	dynamicCache   map[string]string
+	muDynamicCache sync.Mutex
+}
+
+// GetVariables returns fully resolved variables following the priority order:
+// 1. Task variables
+// 2. Call variables
+// 3. Taskfile variables
+// 4. Taskvars file variables
+// 5. Environment variables
+func (c *CompilerV2) GetVariables(t *taskfile.Task, call taskfile.Call) (taskfile.Vars, error) {
+	vr := varResolver{c: c, vars: compiler.GetEnviron()}
+	for _, vars := range []taskfile.Vars{c.Taskvars, c.TaskfileVars, call.Vars, t.Vars} {
+		for i := 0; i < c.Expansions; i++ {
+			vr.merge(vars)
+		}
+	}
+	return vr.vars, vr.err
+}
+
+type varResolver struct {
+	c    *CompilerV2
+	vars taskfile.Vars
+	err  error
+}
+
+func (vr *varResolver) merge(vars taskfile.Vars) {
+	if vr.err != nil {
+		return
+	}
+	tr := templater.Templater{Vars: vr.vars}
+	for k, v := range vars {
+		v = taskfile.Var{
+			Static: tr.Replace(v.Static),
+			Sh:     tr.Replace(v.Sh),
+		}
+		static, err := vr.c.HandleDynamicVar(v)
+		if err != nil {
+			vr.err = err
+			return
+		}
+		vr.vars[k] = taskfile.Var{Static: static}
+	}
+	vr.err = tr.Err()
+}
+
+func (c *CompilerV2) HandleDynamicVar(v taskfile.Var) (string, error) {
+	if v.Static != "" || v.Sh == "" {
+		return v.Static, nil
+	}
+
+	c.muDynamicCache.Lock()
+	defer c.muDynamicCache.Unlock()
+
+	if c.dynamicCache == nil {
+		c.dynamicCache = make(map[string]string, 30)
+	}
+	if result, ok := c.dynamicCache[v.Sh]; ok {
+		return result, nil
+	}
+
+	var stdout bytes.Buffer
+	opts := &execext.RunCommandOptions{
+		Command: v.Sh,
+		Dir:     c.Dir,
+		Stdout:  &stdout,
+		Stderr:  c.Logger.Stderr,
+	}
+	if err := execext.RunCommand(context.Background(), opts); err != nil {
+		return "", fmt.Errorf(`task: Command "%s" in taskvars file failed: %s`, opts.Command, err)
+	}
+
+	// Trim a single trailing newline from the result to make most command
+	// output easier to use in shell commands.
+	result := strings.TrimSuffix(stdout.String(), "\n")
+
+	c.dynamicCache[v.Sh] = result
+	c.Logger.VerboseErrf(`task: dynamic variable: '%s' result: '%s'`, v.Sh, result)
+
+	return result, nil
+}

internal/execext/exec.go

@@ -4,15 +4,18 @@ import (
 	"context"
 	"errors"
 	"io"
+	"os"
+	"path/filepath"
 	"strings"
 
+	"mvdan.cc/sh/expand"
 	"mvdan.cc/sh/interp"
+	"mvdan.cc/sh/shell"
 	"mvdan.cc/sh/syntax"
 )
 
 // RunCommandOptions is the options for the RunCommand func
 type RunCommandOptions struct {
-	Context context.Context
 	Command string
 	Dir     string
 	Env     []string
@@ -27,7 +30,7 @@ var (
 )
 
 // RunCommand runs a shell command
-func RunCommand(opts *RunCommandOptions) error {
+func RunCommand(ctx context.Context, opts *RunCommandOptions) error {
 	if opts == nil {
 		return ErrNilOptions
 	}
@@ -37,20 +40,47 @@ func RunCommand(opts *RunCommandOptions) error {
 		return err
 	}
 
-	r := interp.Runner{
-		Context: opts.Context,
-		Dir:     opts.Dir,
-		Env:     opts.Env,
-
-		Exec: interp.DefaultExec,
-		Open: interp.OpenDevImpls(interp.DefaultOpen),
-
-		Stdin:  opts.Stdin,
-		Stdout: opts.Stdout,
-		Stderr: opts.Stderr,
+	environ := opts.Env
+	if len(environ) == 0 {
+		environ = os.Environ()
 	}
-	if err = r.Reset(); err != nil {
+
+	r, err := interp.New(
+		interp.Dir(opts.Dir),
+		interp.Env(expand.ListEnviron(environ...)),
+
+		interp.Module(interp.DefaultExec),
+		interp.Module(interp.OpenDevImpls(interp.DefaultOpen)),
+
+		interp.StdIO(opts.Stdin, opts.Stdout, opts.Stderr),
+	)
+	if err != nil {
 		return err
 	}
-	return r.Run(p)
+	return r.Run(ctx, p)
+}
+
+// IsExitError returns true the given error is an exis status error
+func IsExitError(err error) bool {
+	switch err.(type) {
+	case interp.ExitStatus, interp.ShellExitStatus:
+		return true
+	default:
+		return false
+	}
+}
+
+// Expand is a helper to mvdan.cc/shell.Fields that returns the first field
+// if available.
+func Expand(s string) (string, error) {
+	s = filepath.ToSlash(s)
+	s = strings.Replace(s, " ", `\ `, -1)
+	fields, err := shell.Fields(s, nil)
+	if err != nil {
+		return "", err
+	}
+	if len(fields) > 0 {
+		return fields[0], nil
+	}
+	return "", nil
 }

internal/logger/logger.go

@@ -0,0 +1,38 @@
+package logger
+
+import (
+	"fmt"
+	"io"
+)
+
+type Logger struct {
+	Stdout  io.Writer
+	Stderr  io.Writer
+	Verbose bool
+}
+
+func (l *Logger) Outf(s string, args ...interface{}) {
+	if len(args) == 0 {
+		s, args = "%s", []interface{}{s}
+	}
+	fmt.Fprintf(l.Stdout, s+"\n", args...)
+}
+
+func (l *Logger) VerboseOutf(s string, args ...interface{}) {
+	if l.Verbose {
+		l.Outf(s, args...)
+	}
+}
+
+func (l *Logger) Errf(s string, args ...interface{}) {
+	if len(args) == 0 {
+		s, args = "%s", []interface{}{s}
+	}
+	fmt.Fprintf(l.Stderr, s+"\n", args...)
+}
+
+func (l *Logger) VerboseErrf(s string, args ...interface{}) {
+	if l.Verbose {
+		l.Errf(s, args...)
+	}
+}

internal/output/group.go

@@ -0,0 +1,26 @@
+package output
+
+import (
+	"bytes"
+	"io"
+)
+
+type Group struct{}
+
+func (Group) WrapWriter(w io.Writer, _ string) io.Writer {
+	return &groupWriter{writer: w}
+}
+
+type groupWriter struct {
+	writer io.Writer
+	buff   bytes.Buffer
+}
+
+func (gw *groupWriter) Write(p []byte) (int, error) {
+	return gw.buff.Write(p)
+}
+
+func (gw *groupWriter) Close() error {
+	_, err := io.Copy(gw.writer, &gw.buff)
+	return err
+}

internal/output/interleaved.go

@@ -0,0 +1,11 @@
+package output
+
+import (
+	"io"
+)
+
+type Interleaved struct{}
+
+func (Interleaved) WrapWriter(w io.Writer, _ string) io.Writer {
+	return w
+}

internal/output/output.go

@@ -0,0 +1,9 @@
+package output
+
+import (
+	"io"
+)
+
+type Output interface {
+	WrapWriter(w io.Writer, prefix string) io.Writer
+}

internal/output/output_test.go

@@ -0,0 +1,63 @@
+package output_test
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"testing"
+
+	"github.com/go-task/task/v2/internal/output"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestInterleaved(t *testing.T) {
+	var b bytes.Buffer
+	var o output.Output = output.Interleaved{}
+	var w = o.WrapWriter(&b, "")
+
+	fmt.Fprintln(w, "foo\nbar")
+	assert.Equal(t, "foo\nbar\n", b.String())
+	fmt.Fprintln(w, "baz")
+	assert.Equal(t, "foo\nbar\nbaz\n", b.String())
+}
+
+func TestGroup(t *testing.T) {
+	var b bytes.Buffer
+	var o output.Output = output.Group{}
+	var w = o.WrapWriter(&b, "").(io.WriteCloser)
+
+	fmt.Fprintln(w, "foo\nbar")
+	assert.Equal(t, "", b.String())
+	fmt.Fprintln(w, "baz")
+	assert.Equal(t, "", b.String())
+	assert.NoError(t, w.Close())
+	assert.Equal(t, "foo\nbar\nbaz\n", b.String())
+}
+
+func TestPrefixed(t *testing.T) {
+	var b bytes.Buffer
+	var o output.Output = output.Prefixed{}
+	var w = o.WrapWriter(&b, "prefix").(io.WriteCloser)
+
+	t.Run("simple use cases", func(t *testing.T) {
+		b.Reset()
+
+		fmt.Fprintln(w, "foo\nbar")
+		assert.Equal(t, "[prefix] foo\n[prefix] bar\n", b.String())
+		fmt.Fprintln(w, "baz")
+		assert.Equal(t, "[prefix] foo\n[prefix] bar\n[prefix] baz\n", b.String())
+	})
+
+	t.Run("multiple writes for a single line", func(t *testing.T) {
+		b.Reset()
+
+		for _, char := range []string{"T", "e", "s", "t", "!"} {
+			fmt.Fprint(w, char)
+			assert.Equal(t, "", b.String())
+		}
+
+		assert.NoError(t, w.Close())
+		assert.Equal(t, "[prefix] Test!\n", b.String())
+	})
+}

internal/output/prefixed.go

@@ -0,0 +1,65 @@
+package output
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"strings"
+)
+
+type Prefixed struct{}
+
+func (Prefixed) WrapWriter(w io.Writer, prefix string) io.Writer {
+	return &prefixWriter{writer: w, prefix: prefix}
+}
+
+type prefixWriter struct {
+	writer io.Writer
+	prefix string
+	buff   bytes.Buffer
+}
+
+func (pw *prefixWriter) Write(p []byte) (int, error) {
+	n, err := pw.buff.Write(p)
+	if err != nil {
+		return n, err
+	}
+
+	return n, pw.writeOutputLines(false)
+}
+
+func (pw *prefixWriter) Close() error {
+	return pw.writeOutputLines(true)
+}
+
+func (pw *prefixWriter) writeOutputLines(force bool) error {
+	for {
+		switch line, err := pw.buff.ReadString('\n'); err {
+		case nil:
+			if err = pw.writeLine(line); err != nil {
+				return err
+			}
+		case io.EOF:
+			// if this line was not a complete line, re-add to the buffer
+			if !force && !strings.HasSuffix(line, "\n") {
+				_, err = pw.buff.WriteString(line)
+				return err
+			}
+
+			return pw.writeLine(line)
+		default:
+			return err
+		}
+	}
+}
+
+func (pw *prefixWriter) writeLine(line string) error {
+	if line == "" {
+		return nil
+	}
+	if !strings.HasSuffix(line, "\n") {
+		line += "\n"
+	}
+	_, err := fmt.Fprintf(pw.writer, "[%s] %s", pw.prefix, line)
+	return err
+}

internal/status/checksum.go

@@ -17,6 +17,7 @@ type Checksum struct {
 	Dir     string
 	Task    string
 	Sources []string
+	Dry     bool
 }
 
 // IsUpToDate implements the Checker interface
@@ -36,9 +37,11 @@ func (c *Checksum) IsUpToDate() (bool, error) {
 		return false, nil
 	}
 
-	_ = os.MkdirAll(filepath.Join(c.Dir, ".task", "checksum"), 0755)
-	if err = ioutil.WriteFile(checksumFile, []byte(newMd5+"\n"), 0644); err != nil {
-		return false, err
+	if !c.Dry {
+		_ = os.MkdirAll(filepath.Join(c.Dir, ".task", "checksum"), 0755)
+		if err = ioutil.WriteFile(checksumFile, []byte(newMd5+"\n"), 0644); err != nil {
+			return false, err
+		}
 	}
 	return oldMd5 == newMd5, nil
 }

internal/status/glob.go

@@ -4,8 +4,9 @@ import (
 	"path/filepath"
 	"sort"
 
+	"github.com/go-task/task/v2/internal/execext"
+
 	"github.com/mattn/go-zglob"
-	"github.com/mitchellh/go-homedir"
 )
 
 func glob(dir string, globs []string) (files []string, err error) {
@@ -13,13 +14,13 @@ func glob(dir string, globs []string) (files []string, err error) {
 		if !filepath.IsAbs(g) {
 			g = filepath.Join(dir, g)
 		}
-		g, err = homedir.Expand(g)
+		g, err = execext.Expand(g)
 		if err != nil {
 			return nil, err
 		}
 		f, err := zglob.Glob(g)
 		if err != nil {
-			return nil, err
+			continue
 		}
 		files = append(files, f...)
 	}

internal/summary/summary.go

@@ -0,0 +1,103 @@
+package summary
+
+import (
+	"strings"
+
+	"github.com/go-task/task/v2/internal/logger"
+	"github.com/go-task/task/v2/internal/taskfile"
+)
+
+func PrintTasks(l *logger.Logger, t *taskfile.Taskfile, c []taskfile.Call) {
+	for i, call := range c {
+		printSpaceBetweenSummaries(l, i)
+		PrintTask(l, t.Tasks[call.Task])
+	}
+}
+
+func printSpaceBetweenSummaries(l *logger.Logger, i int) {
+	spaceRequired := i > 0
+	if !spaceRequired {
+		return
+	}
+
+	l.Outf("")
+	l.Outf("")
+}
+
+func PrintTask(l *logger.Logger, t *taskfile.Task) {
+	printTaskName(l, t)
+	printTaskDescribingText(t, l)
+	printTaskDependencies(l, t)
+	printTaskCommands(l, t)
+}
+
+func printTaskDescribingText(t *taskfile.Task, l *logger.Logger) {
+	if hasSummary(t) {
+		printTaskSummary(l, t)
+	} else if hasDescription(t) {
+		printTaskDescription(l, t)
+	} else {
+		printNoDescriptionOrSummary(l)
+	}
+}
+
+func hasSummary(t *taskfile.Task) bool {
+	return t.Summary != ""
+}
+
+func printTaskSummary(l *logger.Logger, t *taskfile.Task) {
+	lines := strings.Split(t.Summary, "\n")
+	for i, line := range lines {
+		notLastLine := i+1 < len(lines)
+		if notLastLine || line != "" {
+			l.Outf(line)
+		}
+	}
+}
+
+func printTaskName(l *logger.Logger, t *taskfile.Task) {
+	l.Outf("task: %s", t.Task)
+	l.Outf("")
+}
+
+func hasDescription(t *taskfile.Task) bool {
+	return t.Desc != ""
+}
+
+func printTaskDescription(l *logger.Logger, t *taskfile.Task) {
+	l.Outf(t.Desc)
+}
+
+func printNoDescriptionOrSummary(l *logger.Logger) {
+	l.Outf("(task does not have description or summary)")
+}
+
+func printTaskDependencies(l *logger.Logger, t *taskfile.Task) {
+	if len(t.Deps) == 0 {
+		return
+	}
+
+	l.Outf("")
+	l.Outf("dependencies:")
+
+	for _, d := range t.Deps {
+		l.Outf(" - %s", d.Task)
+	}
+}
+
+func printTaskCommands(l *logger.Logger, t *taskfile.Task) {
+	if len(t.Cmds) == 0 {
+		return
+	}
+
+	l.Outf("")
+	l.Outf("commands:")
+	for _, c := range t.Cmds {
+		isCommand := c.Cmd != ""
+		if isCommand {
+			l.Outf(" - %s", c.Cmd)
+		} else {
+			l.Outf(" - Task: %s", c.Task)
+		}
+	}
+}

internal/summary/summary_test.go

@@ -0,0 +1,173 @@
+package summary_test
+
+import (
+	"bytes"
+	"strings"
+	"testing"
+
+	"github.com/go-task/task/v2/internal/logger"
+	"github.com/go-task/task/v2/internal/summary"
+	"github.com/go-task/task/v2/internal/taskfile"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestPrintsDependenciesIfPresent(t *testing.T) {
+	buffer, l := createDummyLogger()
+	task := &taskfile.Task{
+		Deps: []*taskfile.Dep{
+			{Task: "dep1"},
+			{Task: "dep2"},
+			{Task: "dep3"},
+		},
+	}
+
+	summary.PrintTask(&l, task)
+
+	assert.Contains(t, buffer.String(), "\ndependencies:\n - dep1\n - dep2\n - dep3\n")
+}
+
+func createDummyLogger() (*bytes.Buffer, logger.Logger) {
+	buffer := &bytes.Buffer{}
+	l := logger.Logger{
+		Stderr:  buffer,
+		Stdout:  buffer,
+		Verbose: false,
+	}
+	return buffer, l
+}
+
+func TestDoesNotPrintDependenciesIfMissing(t *testing.T) {
+	buffer, l := createDummyLogger()
+	task := &taskfile.Task{
+		Deps: []*taskfile.Dep{},
+	}
+
+	summary.PrintTask(&l, task)
+
+	assert.NotContains(t, buffer.String(), "dependencies:")
+}
+
+func TestPrintTaskName(t *testing.T) {
+	buffer, l := createDummyLogger()
+	task := &taskfile.Task{
+		Task: "my-task-name",
+	}
+
+	summary.PrintTask(&l, task)
+
+	assert.Contains(t, buffer.String(), "task: my-task-name\n")
+}
+
+func TestPrintTaskCommandsIfPresent(t *testing.T) {
+	buffer, l := createDummyLogger()
+	task := &taskfile.Task{
+		Cmds: []*taskfile.Cmd{
+			{Cmd: "command-1"},
+			{Cmd: "command-2"},
+			{Task: "task-1"},
+		},
+	}
+
+	summary.PrintTask(&l, task)
+
+	assert.Contains(t, buffer.String(), "\ncommands:\n")
+	assert.Contains(t, buffer.String(), "\n - command-1\n")
+	assert.Contains(t, buffer.String(), "\n - command-2\n")
+	assert.Contains(t, buffer.String(), "\n - Task: task-1\n")
+}
+
+func TestDoesNotPrintCommandIfMissing(t *testing.T) {
+	buffer, l := createDummyLogger()
+	task := &taskfile.Task{
+		Cmds: []*taskfile.Cmd{},
+	}
+
+	summary.PrintTask(&l, task)
+
+	assert.NotContains(t, buffer.String(), "commands")
+}
+
+func TestLayout(t *testing.T) {
+	buffer, l := createDummyLogger()
+	task := &taskfile.Task{
+		Task:    "sample-task",
+		Summary: "line1\nline2\nline3\n",
+		Deps: []*taskfile.Dep{
+			{Task: "dependency"},
+		},
+		Cmds: []*taskfile.Cmd{
+			{Cmd: "command"},
+		},
+	}
+
+	summary.PrintTask(&l, task)
+
+	assert.Equal(t, expectedOutput(), buffer.String())
+}
+
+func expectedOutput() string {
+	expected := `task: sample-task
+
+line1
+line2
+line3
+
+dependencies:
+ - dependency
+
+commands:
+ - command
+`
+	return expected
+}
+
+func TestPrintDescriptionAsFallback(t *testing.T) {
+	buffer, l := createDummyLogger()
+	taskWithoutSummary := &taskfile.Task{
+		Desc: "description",
+	}
+
+	taskWithSummary := &taskfile.Task{
+		Desc:    "description",
+		Summary: "summary",
+	}
+	taskWithoutSummaryOrDescription := &taskfile.Task{}
+
+	summary.PrintTask(&l, taskWithoutSummary)
+
+	assert.Contains(t, buffer.String(), "description")
+
+	buffer.Reset()
+	summary.PrintTask(&l, taskWithSummary)
+
+	assert.NotContains(t, buffer.String(), "description")
+
+	buffer.Reset()
+	summary.PrintTask(&l, taskWithoutSummaryOrDescription)
+
+	assert.Contains(t, buffer.String(), "\n(task does not have description or summary)\n")
+
+}
+
+func TestPrintAllWithSpaces(t *testing.T) {
+	buffer, l := createDummyLogger()
+
+	t1 := &taskfile.Task{Task: "t1"}
+	t2 := &taskfile.Task{Task: "t2"}
+	t3 := &taskfile.Task{Task: "t3"}
+
+	tasks := make(taskfile.Tasks, 3)
+	tasks["t1"] = t1
+	tasks["t2"] = t2
+	tasks["t3"] = t3
+
+	summary.PrintTasks(&l,
+		&taskfile.Taskfile{Tasks: tasks},
+		[]taskfile.Call{{Task: "t1"}, {Task: "t2"}, {Task: "t3"}})
+
+	assert.True(t, strings.HasPrefix(buffer.String(), "task: t1"))
+	assert.Contains(t, buffer.String(), "\n(task does not have description or summary)\n\n\ntask: t2")
+	assert.Contains(t, buffer.String(), "\n(task does not have description or summary)\n\n\ntask: t3")
+
+}

internal/taskfile/call.go

@@ -0,0 +1,7 @@
+package taskfile
+
+// Call is the parameters to a task call
+type Call struct {
+	Task string
+	Vars Vars
+}

internal/taskfile/cmd.go

@@ -1,4 +1,4 @@
-package task
+package taskfile
 
 import (
 	"errors"
@@ -7,10 +7,11 @@ import (
 
 // Cmd is a task command
 type Cmd struct {
-	Cmd    string
-	Silent bool
-	Task   string
-	Vars   Vars
+	Cmd         string
+	Silent      bool
+	Task        string
+	Vars        Vars
+	IgnoreError bool
 }
 
 // Dep is a task dependency
@@ -38,12 +39,14 @@ func (c *Cmd) UnmarshalYAML(unmarshal func(interface{}) error) error {
 		return nil
 	}
 	var cmdStruct struct {
-		Cmd    string
-		Silent bool
+		Cmd         string
+		Silent      bool
+		IgnoreError bool `yaml:"ignore_error"`
 	}
 	if err := unmarshal(&cmdStruct); err == nil && cmdStruct.Cmd != "" {
 		c.Cmd = cmdStruct.Cmd
 		c.Silent = cmdStruct.Silent
+		c.IgnoreError = cmdStruct.IgnoreError
 		return nil
 	}
 	var taskCall struct {
@@ -76,9 +79,3 @@ func (d *Dep) UnmarshalYAML(unmarshal func(interface{}) error) error {
 	}
 	return ErrCantUnmarshalDep
 }
-
-// Call is the parameters to a task call
-type Call struct {
-	Task string
-	Vars Vars
-}

internal/taskfile/merge.go

@@ -0,0 +1,73 @@
+package taskfile
+
+import (
+	"fmt"
+	"strings"
+)
+
+// NamespaceSeparator contains the character that separates namescapes
+const NamespaceSeparator = ":"
+
+// Merge merges the second Taskfile into the first
+func Merge(t1, t2 *Taskfile, namespaces ...string) error {
+	if t1.Version != t2.Version {
+		return fmt.Errorf(`Taskfiles versions should match. First is "%s" but second is "%s"`, t1.Version, t2.Version)
+	}
+
+	if t2.Expansions != 0 && t2.Expansions != 2 {
+		t1.Expansions = t2.Expansions
+	}
+	if t2.Output != "" {
+		t1.Output = t2.Output
+	}
+
+	if t1.Includes == nil {
+		t1.Includes = make(map[string]string)
+	}
+	for k, v := range t2.Includes {
+		t1.Includes[k] = v
+	}
+
+	if t1.Vars == nil {
+		t1.Vars = make(Vars)
+	}
+	for k, v := range t2.Vars {
+		t1.Vars[k] = v
+	}
+
+	if t1.Env == nil {
+		t1.Env = make(Vars)
+	}
+	for k, v := range t2.Env {
+		t1.Env[k] = v
+	}
+
+	if t1.Tasks == nil {
+		t1.Tasks = make(Tasks)
+	}
+	for k, v := range t2.Tasks {
+		// FIXME(@andreynering): Refactor this block, otherwise we can
+		// have serious side-effects in the future, since we're editing
+		// the original references instead of deep copying them.
+
+		t1.Tasks[taskNameWithNamespace(k, namespaces...)] = v
+
+		for _, dep := range v.Deps {
+			dep.Task = taskNameWithNamespace(dep.Task, namespaces...)
+		}
+		for _, cmd := range v.Cmds {
+			if cmd.Task != "" {
+				cmd.Task = taskNameWithNamespace(cmd.Task, namespaces...)
+			}
+		}
+	}
+
+	return nil
+}
+
+func taskNameWithNamespace(taskName string, namespaces ...string) string {
+	if strings.HasPrefix(taskName, ":") {
+		return strings.TrimPrefix(taskName, ":")
+	}
+	return strings.Join(append(namespaces, taskName), NamespaceSeparator)
+}

internal/taskfile/precondition.go

@@ -0,0 +1,45 @@
+package taskfile
+
+import (
+	"errors"
+	"fmt"
+)
+
+var (
+	// ErrCantUnmarshalPrecondition is returned for invalid precond YAML.
+	ErrCantUnmarshalPrecondition = errors.New("task: Can't unmarshal precondition value")
+)
+
+// Precondition represents a precondition necessary for a task to run
+type Precondition struct {
+	Sh  string
+	Msg string
+}
+
+// UnmarshalYAML implements yaml.Unmarshaler interface.
+func (p *Precondition) UnmarshalYAML(unmarshal func(interface{}) error) error {
+	var cmd string
+
+	if err := unmarshal(&cmd); err == nil {
+		p.Sh = cmd
+		p.Msg = fmt.Sprintf("`%s` failed", cmd)
+		return nil
+	}
+
+	var sh struct {
+		Sh  string
+		Msg string
+	}
+
+	if err := unmarshal(&sh); err != nil {
+		return err
+	}
+
+	p.Sh = sh.Sh
+	p.Msg = sh.Msg
+	if p.Msg == "" {
+		p.Msg = fmt.Sprintf("%s failed", sh.Sh)
+	}
+
+	return nil
+}

internal/taskfile/precondition_test.go

@@ -0,0 +1,48 @@
+package taskfile_test
+
+import (
+	"testing"
+
+	"github.com/go-task/task/v2/internal/taskfile"
+
+	"github.com/stretchr/testify/assert"
+	"gopkg.in/yaml.v2"
+)
+
+func TestPreconditionParse(t *testing.T) {
+	tests := []struct {
+		content  string
+		v        interface{}
+		expected interface{}
+	}{
+		{
+			"test -f foo.txt",
+			&taskfile.Precondition{},
+			&taskfile.Precondition{Sh: `test -f foo.txt`, Msg: "`test -f foo.txt` failed"},
+		},
+		{
+			"sh: '[ 1 = 0 ]'",
+			&taskfile.Precondition{},
+			&taskfile.Precondition{Sh: "[ 1 = 0 ]", Msg: "[ 1 = 0 ] failed"},
+		},
+		{`
+sh: "[ 1 = 2 ]"
+msg: "1 is not 2"
+`,
+			&taskfile.Precondition{},
+			&taskfile.Precondition{Sh: "[ 1 = 2 ]", Msg: "1 is not 2"},
+		},
+		{`
+sh: "[ 1 = 2 ]"
+msg: "1 is not 2"
+`,
+			&taskfile.Precondition{},
+			&taskfile.Precondition{Sh: "[ 1 = 2 ]", Msg: "1 is not 2"},
+		},
+	}
+	for _, test := range tests {
+		err := yaml.Unmarshal([]byte(test.content), test.v)
+		assert.NoError(t, err)
+		assert.Equal(t, test.expected, test.v)
+	}
+}

internal/taskfile/read/taskfile.go

@@ -0,0 +1,77 @@
+package read
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
+	"runtime"
+
+	"github.com/go-task/task/v2/internal/taskfile"
+
+	"gopkg.in/yaml.v2"
+)
+
+var (
+	// ErrIncludedTaskfilesCantHaveIncludes is returned when a included Taskfile contains includes
+	ErrIncludedTaskfilesCantHaveIncludes = errors.New("task: Included Taskfiles can't have includes. Please, move the include to the main Taskfile")
+)
+
+// Taskfile reads a Taskfile for a given directory
+func Taskfile(dir string, entrypoint string) (*taskfile.Taskfile, error) {
+	path := filepath.Join(dir, entrypoint)
+	if _, err := os.Stat(path); err != nil {
+		return nil, fmt.Errorf(`task: No Taskfile found on "%s". Use "task --init" to create a new one`, path)
+	}
+	t, err := readTaskfile(path)
+	if err != nil {
+		return nil, err
+	}
+
+	for namespace, path := range t.Includes {
+		path = filepath.Join(dir, path)
+		info, err := os.Stat(path)
+		if err != nil {
+			return nil, err
+		}
+		if info.IsDir() {
+			path = filepath.Join(path, "Taskfile.yml")
+		}
+		includedTaskfile, err := readTaskfile(path)
+		if err != nil {
+			return nil, err
+		}
+		if len(includedTaskfile.Includes) > 0 {
+			return nil, ErrIncludedTaskfilesCantHaveIncludes
+		}
+		if err = taskfile.Merge(t, includedTaskfile, namespace); err != nil {
+			return nil, err
+		}
+	}
+
+	path = filepath.Join(dir, fmt.Sprintf("Taskfile_%s.yml", runtime.GOOS))
+	if _, err = os.Stat(path); err == nil {
+		osTaskfile, err := readTaskfile(path)
+		if err != nil {
+			return nil, err
+		}
+		if err = taskfile.Merge(t, osTaskfile); err != nil {
+			return nil, err
+		}
+	}
+
+	for name, task := range t.Tasks {
+		task.Task = name
+	}
+
+	return t, nil
+}
+
+func readTaskfile(file string) (*taskfile.Taskfile, error) {
+	f, err := os.Open(file)
+	if err != nil {
+		return nil, err
+	}
+	var t taskfile.Taskfile
+	return &t, yaml.NewDecoder(f).Decode(&t)
+}

internal/taskfile/read/taskvars.go

@@ -0,0 +1,52 @@
+package read
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"runtime"
+
+	"github.com/go-task/task/v2/internal/taskfile"
+
+	"gopkg.in/yaml.v2"
+)
+
+// Taskvars reads a Taskvars for a given directory
+func Taskvars(dir string) (taskfile.Vars, error) {
+	vars := make(taskfile.Vars)
+
+	path := filepath.Join(dir, "Taskvars.yml")
+	if _, err := os.Stat(path); err == nil {
+		vars, err = readTaskvars(path)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	path = filepath.Join(dir, fmt.Sprintf("Taskvars_%s.yml", runtime.GOOS))
+	if _, err := os.Stat(path); err == nil {
+		osVars, err := readTaskvars(path)
+		if err != nil {
+			return nil, err
+		}
+
+		if vars == nil {
+			vars = osVars
+		} else {
+			for k, v := range osVars {
+				vars[k] = v
+			}
+		}
+	}
+
+	return vars, nil
+}
+
+func readTaskvars(file string) (taskfile.Vars, error) {
+	f, err := os.Open(file)
+	if err != nil {
+		return nil, err
+	}
+	var vars taskfile.Vars
+	return vars, yaml.NewDecoder(f).Decode(&vars)
+}

internal/taskfile/task.go

@@ -0,0 +1,24 @@
+package taskfile
+
+// Tasks represents a group of tasks
+type Tasks map[string]*Task
+
+// Task represents a task
+type Task struct {
+	Task         string
+	Cmds         []*Cmd
+	Deps         []*Dep
+	Desc         string
+	Summary      string
+	Sources      []string
+	Generates    []string
+	Status       []string
+	Preconditions []*Precondition
+	Dir          string
+	Vars         Vars
+	Env          Vars
+	Silent       bool
+	Method       string
+	Prefix       string
+	IgnoreError  bool `yaml:"ignore_error"`
+}

internal/taskfile/taskfile.go

@@ -0,0 +1,44 @@
+package taskfile
+
+// Taskfile represents a Taskfile.yml
+type Taskfile struct {
+	Version    string
+	Expansions int
+	Output     string
+	Includes   map[string]string
+	Vars       Vars
+	Env        Vars
+	Tasks      Tasks
+}
+
+// UnmarshalYAML implements yaml.Unmarshaler interface
+func (tf *Taskfile) UnmarshalYAML(unmarshal func(interface{}) error) error {
+	if err := unmarshal(&tf.Tasks); err == nil {
+		tf.Version = "1"
+		return nil
+	}
+
+	var taskfile struct {
+		Version    string
+		Expansions int
+		Output     string
+		Includes   map[string]string
+		Vars       Vars
+		Env        Vars
+		Tasks      Tasks
+	}
+	if err := unmarshal(&taskfile); err != nil {
+		return err
+	}
+	tf.Version = taskfile.Version
+	tf.Expansions = taskfile.Expansions
+	tf.Output = taskfile.Output
+	tf.Includes = taskfile.Includes
+	tf.Vars = taskfile.Vars
+	tf.Env = taskfile.Env
+	tf.Tasks = taskfile.Tasks
+	if tf.Expansions <= 0 {
+		tf.Expansions = 2
+	}
+	return nil
+}

internal/taskfile/taskfile_test.go

@@ -1,9 +1,9 @@
-package task_test
+package taskfile_test
 
 import (
 	"testing"
 
-	"github.com/go-task/task"
+	"github.com/go-task/task/v2/internal/taskfile"
 
 	"github.com/stretchr/testify/assert"
 	"gopkg.in/yaml.v2"
@@ -27,28 +27,28 @@ vars:
 	}{
 		{
 			yamlCmd,
-			&task.Cmd{},
-			&task.Cmd{Cmd: `echo "a string command"`},
+			&taskfile.Cmd{},
+			&taskfile.Cmd{Cmd: `echo "a string command"`},
 		},
 		{
 			yamlTaskCall,
-			&task.Cmd{},
-			&task.Cmd{Task: "another-task", Vars: task.Vars{
-				"PARAM1": task.Var{Static: "VALUE1"},
-				"PARAM2": task.Var{Static: "VALUE2"},
+			&taskfile.Cmd{},
+			&taskfile.Cmd{Task: "another-task", Vars: taskfile.Vars{
+				"PARAM1": taskfile.Var{Static: "VALUE1"},
+				"PARAM2": taskfile.Var{Static: "VALUE2"},
 			}},
 		},
 		{
 			yamlDep,
-			&task.Dep{},
-			&task.Dep{Task: "task-name"},
+			&taskfile.Dep{},
+			&taskfile.Dep{Task: "task-name"},
 		},
 		{
 			yamlTaskCall,
-			&task.Dep{},
-			&task.Dep{Task: "another-task", Vars: task.Vars{
-				"PARAM1": task.Var{Static: "VALUE1"},
-				"PARAM2": task.Var{Static: "VALUE2"},
+			&taskfile.Dep{},
+			&taskfile.Dep{Task: "another-task", Vars: taskfile.Vars{
+				"PARAM1": taskfile.Var{Static: "VALUE1"},
+				"PARAM2": taskfile.Var{Static: "VALUE2"},
 			}},
 		},
 	}

internal/taskfile/var.go

@@ -0,0 +1,58 @@
+package taskfile
+
+import (
+	"errors"
+	"strings"
+)
+
+var (
+	// ErrCantUnmarshalVar is returned for invalid var YAML.
+	ErrCantUnmarshalVar = errors.New("task: can't unmarshal var value")
+)
+
+// Vars is a string[string] variables map.
+type Vars map[string]Var
+
+// ToStringMap converts Vars to a string map containing only the static
+// variables
+func (vs Vars) ToStringMap() (m map[string]string) {
+	m = make(map[string]string, len(vs))
+	for k, v := range vs {
+		if v.Sh != "" {
+			// Dynamic variable is not yet resolved; trigger
+			// <no value> to be used in templates.
+			continue
+		}
+		m[k] = v.Static
+	}
+	return
+}
+
+// Var represents either a static or dynamic variable.
+type Var struct {
+	Static string
+	Sh     string
+}
+
+// UnmarshalYAML implements yaml.Unmarshaler interface.
+func (v *Var) UnmarshalYAML(unmarshal func(interface{}) error) error {
+	var str string
+	if err := unmarshal(&str); err == nil {
+		if strings.HasPrefix(str, "$") {
+			v.Sh = strings.TrimPrefix(str, "$")
+		} else {
+			v.Static = str
+		}
+		return nil
+	}
+
+	var sh struct {
+		Sh string
+	}
+	if err := unmarshal(&sh); err == nil {
+		v.Sh = sh.Sh
+		return nil
+	}
+
+	return ErrCantUnmarshalVar
+}

internal/templater/funcs.go

@@ -0,0 +1,52 @@
+package templater
+
+import (
+	"path/filepath"
+	"runtime"
+	"strings"
+	"text/template"
+
+	"github.com/Masterminds/sprig"
+)
+
+var (
+	templateFuncs template.FuncMap
+)
+
+func init() {
+	taskFuncs := template.FuncMap{
+		"OS":   func() string { return runtime.GOOS },
+		"ARCH": func() string { return runtime.GOARCH },
+		"catLines": func(s string) string {
+			s = strings.Replace(s, "\r\n", " ", -1)
+			return strings.Replace(s, "\n", " ", -1)
+		},
+		"splitLines": func(s string) []string {
+			s = strings.Replace(s, "\r\n", "\n", -1)
+			return strings.Split(s, "\n")
+		},
+		"fromSlash": func(path string) string {
+			return filepath.FromSlash(path)
+		},
+		"toSlash": func(path string) string {
+			return filepath.ToSlash(path)
+		},
+		"exeExt": func() string {
+			if runtime.GOOS == "windows" {
+				return ".exe"
+			}
+			return ""
+		},
+		// IsSH is deprecated.
+		"IsSH": func() bool { return true },
+	}
+	// Deprecated aliases for renamed functions.
+	taskFuncs["FromSlash"] = taskFuncs["fromSlash"]
+	taskFuncs["ToSlash"] = taskFuncs["toSlash"]
+	taskFuncs["ExeExt"] = taskFuncs["exeExt"]
+
+	templateFuncs = sprig.TxtFuncMap()
+	for k, v := range taskFuncs {
+		templateFuncs[k] = v
+	}
+}

internal/templater/templater.go

@@ -0,0 +1,73 @@
+package templater
+
+import (
+	"bytes"
+	"text/template"
+
+	"github.com/go-task/task/v2/internal/taskfile"
+)
+
+// Templater is a help struct that allow us to call "replaceX" funcs multiple
+// times, without having to check for error each time. The first error that
+// happen will be assigned to r.err, and consecutive calls to funcs will just
+// return the zero value.
+type Templater struct {
+	Vars taskfile.Vars
+
+	strMap map[string]string
+	err    error
+}
+
+func (r *Templater) Replace(str string) string {
+	if r.err != nil || str == "" {
+		return ""
+	}
+
+	templ, err := template.New("").Funcs(templateFuncs).Parse(str)
+	if err != nil {
+		r.err = err
+		return ""
+	}
+
+	if r.strMap == nil {
+		r.strMap = r.Vars.ToStringMap()
+	}
+
+	var b bytes.Buffer
+	if err = templ.Execute(&b, r.strMap); err != nil {
+		r.err = err
+		return ""
+	}
+	return b.String()
+}
+
+func (r *Templater) ReplaceSlice(strs []string) []string {
+	if r.err != nil || len(strs) == 0 {
+		return nil
+	}
+
+	new := make([]string, len(strs))
+	for i, str := range strs {
+		new[i] = r.Replace(str)
+	}
+	return new
+}
+
+func (r *Templater) ReplaceVars(vars taskfile.Vars) taskfile.Vars {
+	if r.err != nil || len(vars) == 0 {
+		return nil
+	}
+
+	new := make(taskfile.Vars, len(vars))
+	for k, v := range vars {
+		new[k] = taskfile.Var{
+			Static: r.Replace(v.Static),
+			Sh:     r.Replace(v.Sh),
+		}
+	}
+	return new
+}
+
+func (r *Templater) Err() error {
+	return r.err
+}

log.go

@@ -1,31 +0,0 @@
-package task
-
-import (
-	"fmt"
-)
-
-func (e *Executor) outf(s string, args ...interface{}) {
-	if len(args) == 0 {
-		s, args = "%s", []interface{}{s}
-	}
-	fmt.Fprintf(e.Stdout, s+"\n", args...)
-}
-
-func (e *Executor) verboseOutf(s string, args ...interface{}) {
-	if e.Verbose {
-		e.outf(s, args...)
-	}
-}
-
-func (e *Executor) errf(s string, args ...interface{}) {
-	if len(args) == 0 {
-		s, args = "%s", []interface{}{s}
-	}
-	fmt.Fprintf(e.Stderr, s+"\n", args...)
-}
-
-func (e *Executor) verboseErrf(s string, args ...interface{}) {
-	if e.Verbose {
-		e.errf(s, args...)
-	}
-}

precondition.go

@@ -0,0 +1,31 @@
+package task
+
+import (
+	"context"
+	"errors"
+
+	"github.com/go-task/task/v2/internal/execext"
+	"github.com/go-task/task/v2/internal/taskfile"
+)
+
+var (
+	// ErrPreconditionFailed is returned when a precondition fails
+	ErrPreconditionFailed = errors.New("task: precondition not met")
+)
+
+func (e *Executor) areTaskPreconditionsMet(ctx context.Context, t *taskfile.Task) (bool, error) {
+	for _, p := range t.Preconditions {
+		err := execext.RunCommand(ctx, &execext.RunCommandOptions{
+			Command: p.Sh,
+			Dir:     t.Dir,
+			Env:     getEnviron(t),
+		})
+
+		if err != nil {
+			e.Logger.Errf("task: %s", p.Msg)
+			return false, ErrPreconditionFailed
+		}
+	}
+
+	return true, nil
+}

status.go

@@ -4,16 +4,35 @@ import (
 	"context"
 	"fmt"
 
-	"github.com/go-task/task/internal/execext"
-	"github.com/go-task/task/internal/status"
+	"github.com/go-task/task/v2/internal/execext"
+	"github.com/go-task/task/v2/internal/status"
+	"github.com/go-task/task/v2/internal/taskfile"
 )
 
-func (t *Task) isUpToDate(ctx context.Context) (bool, error) {
+// Status returns an error if any the of given tasks is not up-to-date
+func (e *Executor) Status(ctx context.Context, calls ...taskfile.Call) error {
+	for _, call := range calls {
+		t, err := e.CompiledTask(call)
+		if err != nil {
+			return err
+		}
+		isUpToDate, err := e.isTaskUpToDate(ctx, t)
+		if err != nil {
+			return err
+		}
+		if !isUpToDate {
+			return fmt.Errorf(`task: Task "%s" is not up-to-date`, t.Task)
+		}
+	}
+	return nil
+}
+
+func (e *Executor) isTaskUpToDate(ctx context.Context, t *taskfile.Task) (bool, error) {
 	if len(t.Status) > 0 {
-		return t.isUpToDateStatus(ctx)
+		return e.isTaskUpToDateStatus(ctx, t)
 	}
 
-	checker, err := t.getStatusChecker()
+	checker, err := e.getStatusChecker(t)
 	if err != nil {
 		return false, err
 	}
@@ -21,15 +40,15 @@ func (t *Task) isUpToDate(ctx context.Context) (bool, error) {
 	return checker.IsUpToDate()
 }
 
-func (t *Task) statusOnError() error {
-	checker, err := t.getStatusChecker()
+func (e *Executor) statusOnError(t *taskfile.Task) error {
+	checker, err := e.getStatusChecker(t)
 	if err != nil {
 		return err
 	}
 	return checker.OnError()
 }
 
-func (t *Task) getStatusChecker() (status.Checker, error) {
+func (e *Executor) getStatusChecker(t *taskfile.Task) (status.Checker, error) {
 	switch t.Method {
 	case "", "timestamp":
 		return &status.Timestamp{
@@ -42,6 +61,7 @@ func (t *Task) getStatusChecker() (status.Checker, error) {
 			Dir:     t.Dir,
 			Task:    t.Task,
 			Sources: t.Sources,
+			Dry:     e.Dry,
 		}, nil
 	case "none":
 		return status.None{}, nil
@@ -50,17 +70,18 @@ func (t *Task) getStatusChecker() (status.Checker, error) {
 	}
 }
 
-func (t *Task) isUpToDateStatus(ctx context.Context) (bool, error) {
+func (e *Executor) isTaskUpToDateStatus(ctx context.Context, t *taskfile.Task) (bool, error) {
 	for _, s := range t.Status {
-		err := execext.RunCommand(&execext.RunCommandOptions{
-			Context: ctx,
+		err := execext.RunCommand(ctx, &execext.RunCommandOptions{
 			Command: s,
 			Dir:     t.Dir,
-			Env:     t.getEnviron(),
+			Env:     getEnviron(t),
 		})
 		if err != nil {
+			e.Logger.VerboseOutf("task: status command %s exited non-zero: %s", s, err)
 			return false, nil
 		}
+		e.Logger.VerboseOutf("task: status command %s exited zero", s)
 	}
 	return true, nil
 }

task.go

@@ -2,20 +2,28 @@ package task
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"io"
 	"os"
+	"strconv"
 	"sync"
 	"sync/atomic"
 
-	"github.com/go-task/task/internal/execext"
+	"github.com/go-task/task/v2/internal/compiler"
+	compilerv1 "github.com/go-task/task/v2/internal/compiler/v1"
+	compilerv2 "github.com/go-task/task/v2/internal/compiler/v2"
+	"github.com/go-task/task/v2/internal/execext"
+	"github.com/go-task/task/v2/internal/logger"
+	"github.com/go-task/task/v2/internal/output"
+	"github.com/go-task/task/v2/internal/summary"
+	"github.com/go-task/task/v2/internal/taskfile"
+	"github.com/go-task/task/v2/internal/taskfile/read"
 
 	"golang.org/x/sync/errgroup"
 )
 
 const (
-	// TaskFilePath is the default Taskfile
-	TaskFilePath = "Taskfile"
 	// MaximumTaskCall is the max number of times a task can be called.
 	// This exists to prevent infinite loops on cyclic dependencies
 	MaximumTaskCall = 100
@@ -23,51 +31,76 @@ const (
 
 // Executor executes a Taskfile
 type Executor struct {
-	Tasks   Tasks
-	Dir     string
-	Force   bool
-	Watch   bool
-	Verbose bool
-	Silent  bool
+	Taskfile *taskfile.Taskfile
 
-	Context context.Context
+	Dir        string
+	Entrypoint string
+	Force      bool
+	Watch      bool
+	Verbose    bool
+	Silent     bool
+	Dry        bool
+	Summary    bool
 
 	Stdin  io.Reader
 	Stdout io.Writer
 	Stderr io.Writer
 
-	taskvars Vars
+	Logger      *logger.Logger
+	Compiler    compiler.Compiler
+	Output      output.Output
+	OutputStyle string
+
+	taskvars taskfile.Vars
 
 	taskCallCount map[string]*int32
-
-	dynamicCache   map[string]string
-	muDynamicCache sync.Mutex
-}
-
-// Tasks representas a group of tasks
-type Tasks map[string]*Task
-
-// Task represents a task
-type Task struct {
-	Task      string
-	Cmds      []*Cmd
-	Deps      []*Dep
-	Desc      string
-	Sources   []string
-	Generates []string
-	Status    []string
-	Dir       string
-	Vars      Vars
-	Env       Vars
-	Silent    bool
-	Method    string
+	mkdirMutexMap map[string]*sync.Mutex
 }
 
 // Run runs Task
-func (e *Executor) Run(calls ...Call) error {
-	if e.Context == nil {
-		e.Context = context.Background()
+func (e *Executor) Run(ctx context.Context, calls ...taskfile.Call) error {
+	// check if given tasks exist
+	for _, c := range calls {
+		if _, ok := e.Taskfile.Tasks[c.Task]; !ok {
+			// FIXME: move to the main package
+			e.PrintTasksHelp()
+			return &taskNotFoundError{taskName: c.Task}
+		}
 	}
+
+	if e.Summary {
+		summary.PrintTasks(e.Logger, e.Taskfile, calls)
+		return nil
+	}
+
+	if e.Watch {
+		return e.watchTasks(calls...)
+	}
+
+	for _, c := range calls {
+		if err := e.RunTask(ctx, c); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// Setup setups Executor's internal state
+func (e *Executor) Setup() error {
+	if e.Entrypoint == "" {
+		e.Entrypoint = "Taskfile.yml"
+	}
+
+	var err error
+	e.Taskfile, err = read.Taskfile(e.Dir, e.Entrypoint)
+	if err != nil {
+		return err
+	}
+	e.taskvars, err = read.Taskvars(e.Dir)
+	if err != nil {
+		return err
+	}
+
 	if e.Stdin == nil {
 		e.Stdin = os.Stdin
 	}
@@ -77,39 +110,99 @@ func (e *Executor) Run(calls ...Call) error {
 	if e.Stderr == nil {
 		e.Stderr = os.Stderr
 	}
+	e.Logger = &logger.Logger{
+		Stdout:  e.Stdout,
+		Stderr:  e.Stderr,
+		Verbose: e.Verbose,
+	}
 
-	e.taskCallCount = make(map[string]*int32, len(e.Tasks))
-	for k := range e.Tasks {
+	v, err := strconv.ParseFloat(e.Taskfile.Version, 64)
+	if err != nil {
+		return fmt.Errorf(`task: Could not parse taskfile version "%s": %v`, e.Taskfile.Version, err)
+	}
+	// consider as equal to the greater version if round
+	if v == 2.0 {
+		v = 2.6
+	}
+
+	if v < 1 {
+		return fmt.Errorf(`task: Taskfile version should be greater or equal to v1`)
+	}
+	if v > 2.6 {
+		return fmt.Errorf(`task: Taskfile versions greater than v2.6 not implemented in the version of Task`)
+	}
+
+	if v < 2 {
+		e.Compiler = &compilerv1.CompilerV1{
+			Dir:    e.Dir,
+			Vars:   e.taskvars,
+			Logger: e.Logger,
+		}
+	} else { // v >= 2
+		e.Compiler = &compilerv2.CompilerV2{
+			Dir:          e.Dir,
+			Taskvars:     e.taskvars,
+			TaskfileVars: e.Taskfile.Vars,
+			Expansions:   e.Taskfile.Expansions,
+			Logger:       e.Logger,
+		}
+	}
+
+	if v < 2.1 && e.Taskfile.Output != "" {
+		return fmt.Errorf(`task: Taskfile option "output" is only available starting on Taskfile version v2.1`)
+	}
+	if v < 2.2 && len(e.Taskfile.Includes) > 0 {
+		return fmt.Errorf(`task: Including Taskfiles is only available starting on Taskfile version v2.2`)
+	}
+
+	if e.OutputStyle != "" {
+		e.Taskfile.Output = e.OutputStyle
+	}
+	switch e.Taskfile.Output {
+	case "", "interleaved":
+		e.Output = output.Interleaved{}
+	case "group":
+		e.Output = output.Group{}
+	case "prefixed":
+		e.Output = output.Prefixed{}
+	default:
+		return fmt.Errorf(`task: output option "%s" not recognized`, e.Taskfile.Output)
+	}
+
+	if v <= 2.1 {
+		err := errors.New(`task: Taskfile option "ignore_error" is only available starting on Taskfile version v2.1`)
+
+		for _, task := range e.Taskfile.Tasks {
+			if task.IgnoreError {
+				return err
+			}
+			for _, cmd := range task.Cmds {
+				if cmd.IgnoreError {
+					return err
+				}
+			}
+		}
+	}
+
+	if v < 2.6 {
+		for _, task := range e.Taskfile.Tasks {
+			if len(task.Preconditions) > 0 {
+				return errors.New(`task: Task option "preconditions" is only available starting on Taskfile version v2.6`)
+			}
+		}
+	}
+
+	e.taskCallCount = make(map[string]*int32, len(e.Taskfile.Tasks))
+	e.mkdirMutexMap = make(map[string]*sync.Mutex, len(e.Taskfile.Tasks))
+	for k := range e.Taskfile.Tasks {
 		e.taskCallCount[k] = new(int32)
-	}
-
-	if e.dynamicCache == nil {
-		e.dynamicCache = make(map[string]string, 10)
-	}
-
-	// check if given tasks exist
-	for _, c := range calls {
-		if _, ok := e.Tasks[c.Task]; !ok {
-			// FIXME: move to the main package
-			e.PrintTasksHelp()
-			return &taskNotFoundError{taskName: c.Task}
-		}
-	}
-
-	if e.Watch {
-		return e.watchTasks(calls...)
-	}
-
-	for _, c := range calls {
-		if err := e.RunTask(e.Context, c); err != nil {
-			return err
-		}
+		e.mkdirMutexMap[k] = &sync.Mutex{}
 	}
 	return nil
 }
 
 // RunTask runs a task by its name
-func (e *Executor) RunTask(ctx context.Context, call Call) error {
+func (e *Executor) RunTask(ctx context.Context, call taskfile.Call) error {
 	t, err := e.CompiledTask(call)
 	if err != nil {
 		return err
@@ -123,73 +216,140 @@ func (e *Executor) RunTask(ctx context.Context, call Call) error {
 	}
 
 	if !e.Force {
-		upToDate, err := t.isUpToDate(ctx)
+		preCondMet, err := e.areTaskPreconditionsMet(ctx, t)
 		if err != nil {
 			return err
 		}
-		if upToDate {
+
+		upToDate, err := e.isTaskUpToDate(ctx, t)
+		if err != nil {
+			return err
+		}
+
+		if upToDate && preCondMet {
 			if !e.Silent {
-				e.errf(`task: Task "%s" is up to date`, t.Task)
+				e.Logger.Errf(`task: Task "%s" is up to date`, t.Task)
 			}
 			return nil
 		}
 	}
 
+	if err := e.mkdir(t); err != nil {
+		e.Logger.Errf("task: cannot make directory %q: %v", t.Dir, err)
+	}
+
 	for i := range t.Cmds {
 		if err := e.runCommand(ctx, t, call, i); err != nil {
-			if err2 := t.statusOnError(); err2 != nil {
-				e.verboseErrf("task: error cleaning status on error: %v", err2)
+			if err2 := e.statusOnError(t); err2 != nil {
+				e.Logger.VerboseErrf("task: error cleaning status on error: %v", err2)
 			}
+
+			if execext.IsExitError(err) && t.IgnoreError {
+				e.Logger.VerboseErrf("task: task error ignored: %v", err)
+				continue
+			}
+
 			return &taskRunError{t.Task, err}
 		}
 	}
 	return nil
 }
 
-func (e *Executor) runDeps(ctx context.Context, t *Task) error {
+func (e *Executor) mkdir(t *taskfile.Task) error {
+	if t.Dir == "" {
+		return nil
+	}
+
+	mutex := e.mkdirMutexMap[t.Task]
+	mutex.Lock()
+	defer mutex.Unlock()
+
+	if _, err := os.Stat(t.Dir); os.IsNotExist(err) {
+		if err := os.MkdirAll(t.Dir, 0755); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (e *Executor) runDeps(ctx context.Context, t *taskfile.Task) error {
 	g, ctx := errgroup.WithContext(ctx)
 
 	for _, d := range t.Deps {
 		d := d
 
 		g.Go(func() error {
-			return e.RunTask(ctx, Call{Task: d.Task, Vars: d.Vars})
+			err := e.RunTask(ctx, taskfile.Call{Task: d.Task, Vars: d.Vars})
+			if err != nil {
+				return err
+			}
+			return nil
 		})
 	}
 
 	return g.Wait()
 }
 
-func (e *Executor) runCommand(ctx context.Context, t *Task, call Call, i int) error {
+func (e *Executor) runCommand(ctx context.Context, t *taskfile.Task, call taskfile.Call, i int) error {
 	cmd := t.Cmds[i]
 
-	if cmd.Cmd == "" {
-		return e.RunTask(ctx, Call{Task: cmd.Task, Vars: cmd.Vars})
-	}
+	switch {
+	case cmd.Task != "":
+		err := e.RunTask(ctx, taskfile.Call{Task: cmd.Task, Vars: cmd.Vars})
+		if err != nil {
+			return err
+		}
+		return nil
+	case cmd.Cmd != "":
+		if e.Verbose || (!cmd.Silent && !t.Silent && !e.Silent) {
+			e.Logger.Errf(cmd.Cmd)
+		}
 
-	if e.Verbose || (!cmd.Silent && !t.Silent && !e.Silent) {
-		e.errf(cmd.Cmd)
-	}
+		if e.Dry {
+			return nil
+		}
 
-	return execext.RunCommand(&execext.RunCommandOptions{
-		Context: ctx,
-		Command: cmd.Cmd,
-		Dir:     t.Dir,
-		Env:     t.getEnviron(),
-		Stdin:   e.Stdin,
-		Stdout:  e.Stdout,
-		Stderr:  e.Stderr,
-	})
+		stdOut := e.Output.WrapWriter(e.Stdout, t.Prefix)
+		stdErr := e.Output.WrapWriter(e.Stderr, t.Prefix)
+		defer func() {
+			if _, ok := stdOut.(*os.File); !ok {
+				if closer, ok := stdOut.(io.Closer); ok {
+					closer.Close()
+				}
+			}
+			if _, ok := stdErr.(*os.File); !ok {
+				if closer, ok := stdErr.(io.Closer); ok {
+					closer.Close()
+				}
+			}
+		}()
+
+		err := execext.RunCommand(ctx, &execext.RunCommandOptions{
+			Command: cmd.Cmd,
+			Dir:     t.Dir,
+			Env:     getEnviron(t),
+			Stdin:   e.Stdin,
+			Stdout:  stdOut,
+			Stderr:  stdErr,
+		})
+		if execext.IsExitError(err) && cmd.IgnoreError {
+			e.Logger.VerboseErrf("task: command error ignored: %v", err)
+			return nil
+		}
+		return err
+	default:
+		return nil
+	}
 }
 
-func (t *Task) getEnviron() []string {
+func getEnviron(t *taskfile.Task) []string {
 	if t.Env == nil {
 		return nil
 	}
 
-	envs := os.Environ()
-	for k, v := range t.Env.toStringMap() {
-		envs = append(envs, fmt.Sprintf("%s=%s", k, v))
+	environ := os.Environ()
+	for k, v := range t.Env.ToStringMap() {
+		environ = append(environ, fmt.Sprintf("%s=%s", k, v))
 	}
-	return envs
+	return environ
 }

task_test.go

@@ -2,6 +2,7 @@ package task_test
 
 import (
 	"bytes"
+	"context"
 	"fmt"
 	"io/ioutil"
 	"os"
@@ -9,8 +10,10 @@ import (
 	"strings"
 	"testing"
 
-	"github.com/go-task/task"
+	"github.com/go-task/task/v2"
+	"github.com/go-task/task/v2/internal/taskfile"
 
+	"github.com/mitchellh/go-homedir"
 	"github.com/stretchr/testify/assert"
 )
 
@@ -37,8 +40,8 @@ func (fct fileContentTest) Run(t *testing.T) {
 		Stdout: ioutil.Discard,
 		Stderr: ioutil.Discard,
 	}
-	assert.NoError(t, e.ReadTaskfile(), "e.ReadTaskfile()")
-	assert.NoError(t, e.Run(task.Call{Task: fct.Target}), "e.Run(target)")
+	assert.NoError(t, e.Setup(), "e.Setup()")
+	assert.NoError(t, e.Run(context.Background(), taskfile.Call{Task: fct.Target}), "e.Run(target)")
 
 	for name, expectContent := range fct.Files {
 		t.Run(fct.name(name), func(t *testing.T) {
@@ -51,7 +54,6 @@ func (fct fileContentTest) Run(t *testing.T) {
 			assert.Equal(t, expectContent, s, "unexpected file content")
 		})
 	}
-
 }
 
 func TestEnv(t *testing.T) {
@@ -60,15 +62,16 @@ func TestEnv(t *testing.T) {
 		Target:    "default",
 		TrimSpace: false,
 		Files: map[string]string{
-			"env.txt": "GOOS='linux' GOARCH='amd64' CGO_ENABLED='0'\n",
+			"local.txt":  "GOOS='linux' GOARCH='amd64' CGO_ENABLED='0'\n",
+			"global.txt": "FOO='foo' BAR='overriden' BAZ='baz'\n",
 		},
 	}
 	tt.Run(t)
 }
 
-func TestVars(t *testing.T) {
+func TestVarsV1(t *testing.T) {
 	tt := fileContentTest{
-		Dir:       "testdata/vars",
+		Dir:       "testdata/vars/v1",
 		Target:    "default",
 		TrimSpace: true,
 		Files: map[string]string{
@@ -102,30 +105,70 @@ func TestVars(t *testing.T) {
 	tt.Target = "hello"
 	tt.Run(t)
 }
-func TestMultilineVars(t *testing.T) {
+
+func TestVarsV2(t *testing.T) {
 	tt := fileContentTest{
-		Dir:       "testdata/vars/multiline",
+		Dir:       "testdata/vars/v2",
 		Target:    "default",
-		TrimSpace: false,
+		TrimSpace: true,
 		Files: map[string]string{
-			// Note:
-			// - task does not strip a trailing newline from var entries
-			// - task strips one trailing newline from shell output
-			// - the cat command adds a trailing newline
-			"echo_foobar.txt":      "foo\nbar\n",
-			"echo_n_foobar.txt":    "foo\nbar\n",
-			"echo_n_multiline.txt": "\n\nfoo\n  bar\nfoobar\n\nbaz\n\n",
-			"var_multiline.txt":    "\n\nfoo\n  bar\nfoobar\n\nbaz\n\n\n",
-			"var_catlines.txt":     "  foo   bar foobar  baz  \n",
-			"var_enumfile.txt":     "0:\n1:\n2:foo\n3:  bar\n4:foobar\n5:\n6:baz\n7:\n8:\n",
+			"foo.txt":              "foo",
+			"bar.txt":              "bar",
+			"baz.txt":              "baz",
+			"tmpl_foo.txt":         "foo",
+			"tmpl_bar.txt":         "bar",
+			"tmpl_foo2.txt":        "foo2",
+			"tmpl_bar2.txt":        "bar2",
+			"shtmpl_foo.txt":       "foo",
+			"shtmpl_foo2.txt":      "foo2",
+			"nestedtmpl_foo.txt":   "<no value>",
+			"nestedtmpl_foo2.txt":  "foo2",
+			"foo2.txt":             "foo2",
+			"bar2.txt":             "bar2",
+			"baz2.txt":             "baz2",
+			"tmpl2_foo.txt":        "<no value>",
+			"tmpl2_foo2.txt":       "foo2",
+			"tmpl2_bar.txt":        "<no value>",
+			"tmpl2_bar2.txt":       "bar2",
+			"shtmpl2_foo.txt":      "<no value>",
+			"shtmpl2_foo2.txt":     "foo2",
+			"nestedtmpl2_foo2.txt": "<no value>",
+			"override.txt":         "bar",
+			"nested.txt":           "Taskvars-TaskfileVars-TaskVars",
 		},
 	}
 	tt.Run(t)
+	// Ensure identical results when running hello task directly.
+	tt.Target = "hello"
+	tt.Run(t)
+}
+
+func TestMultilineVars(t *testing.T) {
+	for _, dir := range []string{"testdata/vars/v1/multiline", "testdata/vars/v2/multiline"} {
+		tt := fileContentTest{
+			Dir:       dir,
+			Target:    "default",
+			TrimSpace: false,
+			Files: map[string]string{
+				// Note:
+				// - task does not strip a trailing newline from var entries
+				// - task strips one trailing newline from shell output
+				// - the cat command adds a trailing newline
+				"echo_foobar.txt":      "foo\nbar\n",
+				"echo_n_foobar.txt":    "foo\nbar\n",
+				"echo_n_multiline.txt": "\n\nfoo\n  bar\nfoobar\n\nbaz\n\n",
+				"var_multiline.txt":    "\n\nfoo\n  bar\nfoobar\n\nbaz\n\n\n",
+				"var_catlines.txt":     "  foo   bar foobar  baz  \n",
+				"var_enumfile.txt":     "0:\n1:\n2:foo\n3:  bar\n4:foobar\n5:\n6:baz\n7:\n8:\n",
+			},
+		}
+		tt.Run(t)
+	}
 }
 
 func TestVarsInvalidTmpl(t *testing.T) {
 	const (
-		dir         = "testdata/vars"
+		dir         = "testdata/vars/v1"
 		target      = "invalid-var-tmpl"
 		expectError = "template: :1: unexpected EOF"
 	)
@@ -135,8 +178,8 @@ func TestVarsInvalidTmpl(t *testing.T) {
 		Stdout: ioutil.Discard,
 		Stderr: ioutil.Discard,
 	}
-	assert.NoError(t, e.ReadTaskfile(), "e.ReadTaskfile()")
-	assert.EqualError(t, e.Run(task.Call{Task: target}), expectError, "e.Run(target)")
+	assert.NoError(t, e.Setup(), "e.Setup()")
+	assert.EqualError(t, e.Run(context.Background(), taskfile.Call{Task: target}), expectError, "e.Run(target)")
 }
 
 func TestParams(t *testing.T) {
@@ -187,13 +230,13 @@ func TestDeps(t *testing.T) {
 		Stdout: ioutil.Discard,
 		Stderr: ioutil.Discard,
 	}
-	assert.NoError(t, e.ReadTaskfile())
-	assert.NoError(t, e.Run(task.Call{Task: "default"}))
+	assert.NoError(t, e.Setup())
+	assert.NoError(t, e.Run(context.Background(), taskfile.Call{Task: "default"}))
 
 	for _, f := range files {
 		f = filepath.Join(dir, f)
 		if _, err := os.Stat(f); err != nil {
-			t.Errorf("File %s should exists", f)
+			t.Errorf("File %s should exist", f)
 		}
 	}
 }
@@ -205,45 +248,90 @@ func TestStatus(t *testing.T) {
 	_ = os.Remove(file)
 
 	if _, err := os.Stat(file); err == nil {
-		t.Errorf("File should not exists: %v", err)
+		t.Errorf("File should not exist: %v", err)
 	}
 
+	var buff bytes.Buffer
 	e := &task.Executor{
 		Dir:    dir,
-		Stdout: ioutil.Discard,
-		Stderr: ioutil.Discard,
+		Stdout: &buff,
+		Stderr: &buff,
+		Silent: true,
 	}
-	assert.NoError(t, e.ReadTaskfile())
-	assert.NoError(t, e.Run(task.Call{Task: "gen-foo"}))
+	assert.NoError(t, e.Setup())
+	assert.NoError(t, e.Run(context.Background(), taskfile.Call{Task: "gen-foo"}))
 
 	if _, err := os.Stat(file); err != nil {
-		t.Errorf("File should exists: %v", err)
+		t.Errorf("File should exist: %v", err)
 	}
 
-	buff := bytes.NewBuffer(nil)
-	e.Stdout, e.Stderr = buff, buff
-	assert.NoError(t, e.Run(task.Call{Task: "gen-foo"}))
+	e.Silent = false
+	assert.NoError(t, e.Run(context.Background(), taskfile.Call{Task: "gen-foo"}))
 
 	if buff.String() != `task: Task "gen-foo" is up to date`+"\n" {
 		t.Errorf("Wrong output message: %s", buff.String())
 	}
 }
 
+func TestPrecondition(t *testing.T) {
+	const dir = "testdata/precondition"
+
+	var buff bytes.Buffer
+	e := &task.Executor{
+		Dir:    dir,
+		Stdout: &buff,
+		Stderr: &buff,
+	}
+
+	// A precondition that has been met
+	assert.NoError(t, e.Setup())
+	assert.NoError(t, e.Run(context.Background(), taskfile.Call{Task: "foo"}))
+	if buff.String() != "" {
+		t.Errorf("Got Output when none was expected: %s", buff.String())
+	}
+
+	// A precondition that was not met
+	assert.Error(t, e.Run(context.Background(), taskfile.Call{Task: "impossible"}))
+
+	if buff.String() != "task: 1 != 0 obviously!\n" {
+		t.Errorf("Wrong output message: %s", buff.String())
+	}
+	buff.Reset()
+
+	// Calling a task with a precondition in a dependency fails the task
+	assert.Error(t, e.Run(context.Background(), taskfile.Call{Task: "depends_on_impossible"}))
+
+	if buff.String() != "task: 1 != 0 obviously!\n" {
+		t.Errorf("Wrong output message: %s", buff.String())
+	}
+	buff.Reset()
+
+	// Calling a task with a precondition in a cmd fails the task
+	assert.Error(t, e.Run(context.Background(), taskfile.Call{Task: "executes_failing_task_as_cmd"}))
+	if buff.String() != "task: 1 != 0 obviously!\n" {
+		t.Errorf("Wrong output message: %s", buff.String())
+	}
+	buff.Reset()
+}
+
 func TestGenerates(t *testing.T) {
-	var srcTask = "sub/src.txt"
-	var relTask = "rel.txt"
-	var absTask = "abs.txt"
+	const (
+		srcTask        = "sub/src.txt"
+		relTask        = "rel.txt"
+		absTask        = "abs.txt"
+		fileWithSpaces = "my text file.txt"
+	)
 
 	// This test does not work with a relative dir.
 	dir, err := filepath.Abs("testdata/generates")
 	assert.NoError(t, err)
 	var srcFile = filepath.Join(dir, srcTask)
 
-	for _, task := range []string{srcTask, relTask, absTask} {
+	for _, task := range []string{srcTask, relTask, absTask, fileWithSpaces} {
 		path := filepath.Join(dir, task)
 		_ = os.Remove(path)
 		if _, err := os.Stat(path); err == nil {
-			t.Errorf("File should not exists: %v", err)
+			t.Errorf("File should not exist: %v", err)
 		}
 	}
 
@@ -253,21 +341,21 @@ func TestGenerates(t *testing.T) {
 		Stdout: buff,
 		Stderr: buff,
 	}
-	assert.NoError(t, e.ReadTaskfile())
+	assert.NoError(t, e.Setup())
 
-	for _, theTask := range []string{relTask, absTask} {
+	for _, theTask := range []string{relTask, absTask, fileWithSpaces} {
 		var destFile = filepath.Join(dir, theTask)
 		var upToDate = fmt.Sprintf("task: Task \"%s\" is up to date\n", srcTask) +
 			fmt.Sprintf("task: Task \"%s\" is up to date\n", theTask)
 
 		// Run task for the first time.
-		assert.NoError(t, e.Run(task.Call{Task: theTask}))
+		assert.NoError(t, e.Run(context.Background(), taskfile.Call{Task: theTask}))
 
 		if _, err := os.Stat(srcFile); err != nil {
-			t.Errorf("File should exists: %v", err)
+			t.Errorf("File should exist: %v", err)
 		}
 		if _, err := os.Stat(destFile); err != nil {
-			t.Errorf("File should exists: %v", err)
+			t.Errorf("File should exist: %v", err)
 		}
 		// Ensure task was not incorrectly found to be up-to-date on first run.
 		if buff.String() == upToDate {
@@ -276,7 +364,7 @@ func TestGenerates(t *testing.T) {
 		buff.Reset()
 
 		// Re-run task to ensure it's now found to be up-to-date.
-		assert.NoError(t, e.Run(task.Call{Task: theTask}))
+		assert.NoError(t, e.Run(context.Background(), taskfile.Call{Task: theTask}))
 		if buff.String() != upToDate {
 			t.Errorf("Wrong output message: %s", buff.String())
 		}
@@ -305,16 +393,16 @@ func TestStatusChecksum(t *testing.T) {
 		Stdout: &buff,
 		Stderr: &buff,
 	}
-	assert.NoError(t, e.ReadTaskfile())
+	assert.NoError(t, e.Setup())
 
-	assert.NoError(t, e.Run(task.Call{Task: "build"}))
+	assert.NoError(t, e.Run(context.Background(), taskfile.Call{Task: "build"}))
 	for _, f := range files {
 		_, err := os.Stat(filepath.Join(dir, f))
 		assert.NoError(t, err)
 	}
 
 	buff.Reset()
-	assert.NoError(t, e.Run(task.Call{Task: "build"}))
+	assert.NoError(t, e.Run(context.Background(), taskfile.Call{Task: "build"}))
 	assert.Equal(t, `task: Task "build" is up to date`+"\n", buff.String())
 }
 
@@ -324,7 +412,7 @@ func TestInit(t *testing.T) {
 
 	_ = os.Remove(file)
 	if _, err := os.Stat(file); err == nil {
-		t.Errorf("Taskfile.yml should not exists")
+		t.Errorf("Taskfile.yml should not exist")
 	}
 
 	if err := task.InitTaskfile(ioutil.Discard, dir); err != nil {
@@ -332,7 +420,7 @@ func TestInit(t *testing.T) {
 	}
 
 	if _, err := os.Stat(file); err != nil {
-		t.Errorf("Taskfile.yml should exists")
+		t.Errorf("Taskfile.yml should exist")
 	}
 }
 
@@ -344,6 +432,249 @@ func TestCyclicDep(t *testing.T) {
 		Stdout: ioutil.Discard,
 		Stderr: ioutil.Discard,
 	}
-	assert.NoError(t, e.ReadTaskfile())
-	assert.IsType(t, &task.MaximumTaskCallExceededError{}, e.Run(task.Call{Task: "task-1"}))
+	assert.NoError(t, e.Setup())
+	assert.IsType(t, &task.MaximumTaskCallExceededError{}, e.Run(context.Background(), taskfile.Call{Task: "task-1"}))
+}
+
+func TestTaskVersion(t *testing.T) {
+	tests := []struct {
+		Dir     string
+		Version string
+	}{
+		{"testdata/version/v1", "1"},
+		{"testdata/version/v2", "2"},
+	}
+
+	for _, test := range tests {
+		t.Run(test.Dir, func(t *testing.T) {
+			e := task.Executor{
+				Dir:    test.Dir,
+				Stdout: ioutil.Discard,
+				Stderr: ioutil.Discard,
+			}
+			assert.NoError(t, e.Setup())
+			assert.Equal(t, test.Version, e.Taskfile.Version)
+			assert.Equal(t, 2, len(e.Taskfile.Tasks))
+		})
+	}
+}
+
+func TestTaskIgnoreErrors(t *testing.T) {
+	const dir = "testdata/ignore_errors"
+
+	e := task.Executor{
+		Dir:    dir,
+		Stdout: ioutil.Discard,
+		Stderr: ioutil.Discard,
+	}
+	assert.NoError(t, e.Setup())
+
+	assert.NoError(t, e.Run(context.Background(), taskfile.Call{Task: "task-should-pass"}))
+	assert.Error(t, e.Run(context.Background(), taskfile.Call{Task: "task-should-fail"}))
+	assert.NoError(t, e.Run(context.Background(), taskfile.Call{Task: "cmd-should-pass"}))
+	assert.Error(t, e.Run(context.Background(), taskfile.Call{Task: "cmd-should-fail"}))
+}
+
+func TestExpand(t *testing.T) {
+	const dir = "testdata/expand"
+
+	home, err := homedir.Dir()
+	if err != nil {
+		t.Errorf("Couldn't get $HOME: %v", err)
+	}
+	var buff bytes.Buffer
+
+	e := task.Executor{
+		Dir:    dir,
+		Stdout: &buff,
+		Stderr: &buff,
+	}
+	assert.NoError(t, e.Setup())
+	assert.NoError(t, e.Run(context.Background(), taskfile.Call{Task: "pwd"}))
+	assert.Equal(t, home, strings.TrimSpace(buff.String()))
+}
+
+func TestDry(t *testing.T) {
+	const dir = "testdata/dry"
+
+	file := filepath.Join(dir, "file.txt")
+	_ = os.Remove(file)
+
+	var buff bytes.Buffer
+
+	e := task.Executor{
+		Dir:    dir,
+		Stdout: &buff,
+		Stderr: &buff,
+		Dry:    true,
+	}
+	assert.NoError(t, e.Setup())
+	assert.NoError(t, e.Run(context.Background(), taskfile.Call{Task: "build"}))
+
+	assert.Equal(t, "touch file.txt", strings.TrimSpace(buff.String()))
+	if _, err := os.Stat(file); err == nil {
+		t.Errorf("File should not exist %s", file)
+	}
+}
+
+// TestDryChecksum tests if the checksum file is not being written to disk
+// if the dry mode is enabled.
+func TestDryChecksum(t *testing.T) {
+	const dir = "testdata/dry_checksum"
+
+	checksumFile := filepath.Join(dir, ".task/checksum/default")
+	_ = os.Remove(checksumFile)
+
+	e := task.Executor{
+		Dir:    dir,
+		Stdout: ioutil.Discard,
+		Stderr: ioutil.Discard,
+		Dry:    true,
+	}
+	assert.NoError(t, e.Setup())
+	assert.NoError(t, e.Run(context.Background(), taskfile.Call{Task: "default"}))
+
+	_, err := os.Stat(checksumFile)
+	assert.Error(t, err, "checksum file should not exist")
+
+	e.Dry = false
+	assert.NoError(t, e.Run(context.Background(), taskfile.Call{Task: "default"}))
+	_, err = os.Stat(checksumFile)
+	assert.NoError(t, err, "checksum file should exist")
+}
+
+func TestIncludes(t *testing.T) {
+	tt := fileContentTest{
+		Dir:       "testdata/includes",
+		Target:    "default",
+		TrimSpace: true,
+		Files: map[string]string{
+			"main.txt":               "main",
+			"included_directory.txt": "included_directory",
+			"included_taskfile.txt":  "included_taskfile",
+		},
+	}
+	tt.Run(t)
+}
+
+func TestIncludesEmptyMain(t *testing.T) {
+	tt := fileContentTest{
+		Dir:       "testdata/includes_empty",
+		Target:    "included:default",
+		TrimSpace: true,
+		Files: map[string]string{
+			"file.txt": "default",
+		},
+	}
+	tt.Run(t)
+}
+
+func TestIncludesDependencies(t *testing.T) {
+	tt := fileContentTest{
+		Dir:       "testdata/includes_deps",
+		Target:    "default",
+		TrimSpace: true,
+		Files: map[string]string{
+			"default.txt":     "default",
+			"called_dep.txt":  "called_dep",
+			"called_task.txt": "called_task",
+		},
+	}
+	tt.Run(t)
+}
+
+func TestIncludesCallingRoot(t *testing.T) {
+	tt := fileContentTest{
+		Dir:       "testdata/includes_call_root_task",
+		Target:    "included:call-root",
+		TrimSpace: true,
+		Files: map[string]string{
+			"root_task.txt": "root task",
+		},
+	}
+	tt.Run(t)
+}
+
+func TestSummary(t *testing.T) {
+	const dir = "testdata/summary"
+
+	var buff bytes.Buffer
+	e := task.Executor{
+		Dir:     dir,
+		Stdout:  &buff,
+		Stderr:  &buff,
+		Summary: true,
+		Silent:  true,
+	}
+	assert.NoError(t, e.Setup())
+	assert.NoError(t, e.Run(context.Background(), taskfile.Call{Task: "task-with-summary"}, taskfile.Call{Task: "other-task-with-summary"}))
+	assert.Equal(t, readTestFixture(t, dir, "task-with-summary.txt"), buff.String())
+}
+
+func readTestFixture(t *testing.T, dir string, file string) string {
+	b, err := ioutil.ReadFile(dir + "/" + file)
+	assert.NoError(t, err, "error reading text fixture")
+	return string(b)
+}
+
+func TestWhenNoDirAttributeItRunsInSameDirAsTaskfile(t *testing.T) {
+	const expected = "dir"
+	const dir = "testdata/" + expected
+	var out bytes.Buffer
+	e := &task.Executor{
+		Dir:    dir,
+		Stdout: &out,
+		Stderr: &out,
+	}
+
+	assert.NoError(t, e.Setup())
+	assert.NoError(t, e.Run(context.Background(), taskfile.Call{Task: "whereami"}))
+
+	// got should be the "dir" part of "testdata/dir"
+	got := strings.TrimSuffix(filepath.Base(out.String()), "\n")
+	assert.Equal(t, expected, got, "Mismatch in the working directory")
+}
+
+func TestWhenDirAttributeAndDirExistsItRunsInThatDir(t *testing.T) {
+	const expected = "exists"
+	const dir = "testdata/dir/explicit_exists"
+	var out bytes.Buffer
+	e := &task.Executor{
+		Dir:    dir,
+		Stdout: &out,
+		Stderr: &out,
+	}
+
+	assert.NoError(t, e.Setup())
+	assert.NoError(t, e.Run(context.Background(), taskfile.Call{Task: "whereami"}))
+
+	got := strings.TrimSuffix(filepath.Base(out.String()), "\n")
+	assert.Equal(t, expected, got, "Mismatch in the working directory")
+}
+
+func TestWhenDirAttributeItCreatesMissingAndRunsInThatDir(t *testing.T) {
+	const expected = "createme"
+	const dir = "testdata/dir/explicit_doesnt_exist/"
+	const toBeCreated = dir + expected
+	const target = "whereami"
+	var out bytes.Buffer
+	e := &task.Executor{
+		Dir:    dir,
+		Stdout: &out,
+		Stderr: &out,
+	}
+
+	// Ensure that the directory to be created doesn't actually exist.
+	_ = os.Remove(toBeCreated)
+	if _, err := os.Stat(toBeCreated); err == nil {
+		t.Errorf("Directory should not exist: %v", err)
+	}
+	assert.NoError(t, e.Setup())
+	assert.NoError(t, e.Run(context.Background(), taskfile.Call{Task: target}))
+
+	got := strings.TrimSuffix(filepath.Base(out.String()), "\n")
+	assert.Equal(t, expected, got, "Mismatch in the working directory")
+
+	// Clean-up after ourselves only if no error.
+	_ = os.Remove(toBeCreated)
 }

taskfile.go

@@ -1,70 +0,0 @@
-package task
-
-import (
-	"fmt"
-	"io/ioutil"
-	"path/filepath"
-	"runtime"
-
-	"github.com/imdario/mergo"
-	"gopkg.in/yaml.v2"
-)
-
-// ReadTaskfile parses Taskfile from the disk
-func (e *Executor) ReadTaskfile() error {
-	path := filepath.Join(e.Dir, TaskFilePath)
-
-	var err error
-	e.Tasks, err = e.readTaskfileData(path)
-	if err != nil {
-		return err
-	}
-
-	osTasks, err := e.readTaskfileData(fmt.Sprintf("%s_%s", path, runtime.GOOS))
-	if err != nil {
-		switch err.(type) {
-		case taskFileNotFound:
-		default:
-			return err
-		}
-	}
-	if err := mergo.MapWithOverwrite(&e.Tasks, osTasks); err != nil {
-		return err
-	}
-	for name, task := range e.Tasks {
-		task.Task = name
-	}
-
-	return e.readTaskvars()
-}
-
-func (e *Executor) readTaskfileData(path string) (tasks map[string]*Task, err error) {
-	if b, err := ioutil.ReadFile(path + ".yml"); err == nil {
-		return tasks, yaml.UnmarshalStrict(b, &tasks)
-	}
-	return nil, taskFileNotFound{path}
-}
-
-func (e *Executor) readTaskvars() error {
-	var (
-		file           = filepath.Join(e.Dir, TaskvarsFilePath)
-		osSpecificFile = fmt.Sprintf("%s_%s", file, runtime.GOOS)
-	)
-
-	if b, err := ioutil.ReadFile(file + ".yml"); err == nil {
-		if err := yaml.UnmarshalStrict(b, &e.taskvars); err != nil {
-			return err
-		}
-	}
-
-	if b, err := ioutil.ReadFile(osSpecificFile + ".yml"); err == nil {
-		osTaskvars := make(Vars, 10)
-		if err := yaml.UnmarshalStrict(b, &osTaskvars); err != nil {
-			return err
-		}
-		for k, v := range osTaskvars {
-			e.taskvars[k] = v
-		}
-	}
-	return nil
-}

testdata/checksum/Taskfile.yml

@@ -2,6 +2,7 @@ build:
   cmds:
     - cp ./source.txt ./generated.txt
   sources:
+    - ./**/glob-with-inexistent-file.txt
     - ./source.txt
   generates:
     - ./generated.txt

testdata/dir/Taskfile.yml

@@ -0,0 +1,7 @@
+version: '2'
+
+tasks:
+  whereami:
+    cmds:
+      - pwd
+    silent: true

testdata/dir/explicit_doesnt_exist/Taskfile.yml

@@ -0,0 +1,8 @@
+version: '2'
+
+tasks:
+  whereami:
+    dir: createme
+    cmds:
+      - pwd
+    silent: true

testdata/dir/explicit_exists/Taskfile.yml

@@ -0,0 +1,8 @@
+version: '2'
+
+tasks:
+  whereami:
+    dir: exists
+    cmds:
+      - pwd
+    silent: true

testdata/dry/Taskfile.yml

@@ -0,0 +1,6 @@
+version: '2'
+
+tasks:
+  build:
+    cmds:
+      - touch file.txt

testdata/dry_checksum/Taskfile.yml

@@ -0,0 +1,9 @@
+version: '2'
+
+tasks:
+  default:
+    cmds:
+      - echo "Working..."
+    sources:
+      - source.txt
+    method: checksum

testdata/dry_checksum/source.txt

@@ -0,0 +1 @@
+Something...

testdata/env/.gitignore

@@ -1 +1 @@
-env.txt
+*.txt

testdata/env/Taskfile.yml

@@ -1,10 +1,33 @@
-default:
-  vars:
-    AMD64: amd64
-  env:
-    GOOS: linux
-    GOARCH: "{{.AMD64}}"
-    CGO_ENABLED:
-      sh: echo '0'
-  cmds:
-    - echo "GOOS='$GOOS' GOARCH='$GOARCH' CGO_ENABLED='$CGO_ENABLED'" > env.txt
+version: '2'
+
+vars:
+  BAZ:
+    sh: echo baz
+
+env:
+  FOO: foo
+  BAR: bar
+  BAZ: "{{.BAZ}}"
+
+tasks:
+  default:
+    cmds:
+      - task: local
+      - task: global
+
+  local:
+    vars:
+      AMD64: amd64
+    env:
+      GOOS: linux
+      GOARCH: "{{.AMD64}}"
+      CGO_ENABLED:
+        sh: echo '0'
+    cmds:
+      - echo "GOOS='$GOOS' GOARCH='$GOARCH' CGO_ENABLED='$CGO_ENABLED'" > local.txt
+
+  global:
+    env:
+      BAR: overriden
+    cmds:
+      - echo "FOO='$FOO' BAR='$BAR' BAZ='$BAZ'" > global.txt

testdata/expand/Taskfile.yml

@@ -0,0 +1,8 @@
+version: '2'
+
+tasks:
+  pwd:
+    cmds:
+      - pwd
+    dir: '~'
+    silent: true

testdata/generates/Taskfile.yml

@@ -29,3 +29,13 @@ sub/src.txt:
     - echo "hello world" > sub/src.txt
   status:
     - test -f sub/src.txt
+
+'my text file.txt':
+  desc: generate file with spaces in the name
+  deps: [sub/src.txt]
+  cmds:
+    - cat sub/src.txt > 'my text file.txt'
+  sources:
+    - sub/src.txt
+  generates:
+    - 'my text file.txt'

testdata/ignore_errors/Taskfile.yml

@@ -0,0 +1,20 @@
+version: '2'
+
+tasks:
+  task-should-pass:
+    cmds:
+      - exit 1
+    ignore_error: true
+
+  task-should-fail:
+    cmds:
+      - exit 1
+
+  cmd-should-pass:
+    cmds:
+      - cmd: exit 1
+        ignore_error: true
+
+  cmd-should-fail:
+    cmds:
+      - cmd: exit 1

testdata/includes/Taskfile.yml

@@ -0,0 +1,16 @@
+version: '2'
+
+includes:
+  included: ./included
+  included_taskfile: ./Taskfile2.yml
+
+tasks:
+  default:
+    cmds:
+      - task: gen
+      - task: included:gen
+      - task: included_taskfile:gen
+
+  gen:
+    cmds:
+      - echo main > main.txt

testdata/includes/Taskfile2.yml

@@ -0,0 +1,6 @@
+version: '2'
+
+tasks:
+  gen:
+    cmds:
+      - echo included_taskfile > included_taskfile.txt

testdata/includes/included/Taskfile.yml

@@ -0,0 +1,6 @@
+version: '2'
+
+tasks:
+  gen:
+    cmds:
+      - echo included_directory > included_directory.txt

testdata/includes_call_root_task/.gitignore

@@ -0,0 +1 @@
+*.txt

testdata/includes_call_root_task/Taskfile.yml

@@ -0,0 +1,9 @@
+version: '2'
+
+includes:
+  included: Taskfile2.yml
+
+tasks:
+  root-task:
+    cmds:
+      - echo "root task" > root_task.txt

testdata/includes_call_root_task/Taskfile2.yml

@@ -0,0 +1,6 @@
+version: '2'
+
+tasks:
+  call-root:
+    cmds:
+      - task: :root-task

testdata/includes_deps/.gitignore

@@ -0,0 +1 @@
+*.txt

testdata/includes_deps/Taskfile.yml

@@ -0,0 +1,9 @@
+version: '2'
+
+includes:
+  included: Taskfile2.yml
+
+tasks:
+  default:
+    cmds:
+      - task: included:default

testdata/includes_deps/Taskfile2.yml

@@ -0,0 +1,16 @@
+version: '2'
+
+tasks:
+  default:
+    deps: [called_dep]
+    cmds:
+      - echo "default" > default.txt
+      - task: called_task
+
+  called_dep:
+    cmds:
+      - echo "called_dep" > called_dep.txt
+
+  called_task:
+    cmds:
+      - echo "called_task" > called_task.txt

testdata/includes_empty/.gitignore

@@ -0,0 +1 @@
+file.txt

testdata/includes_empty/Taskfile.yml

@@ -0,0 +1,4 @@
+version: '2'
+
+includes:
+  included: Taskfile2.yml

testdata/includes_empty/Taskfile2.yml

@@ -0,0 +1,10 @@
+version: '2'
+
+vars:
+  FILE: file.txt
+  CONTENT: default
+
+tasks:
+  default:
+    cmds:
+      - echo "{{.CONTENT}}" > {{.FILE}}

testdata/precondition/Taskfile.yml

@@ -0,0 +1,19 @@
+version: '2'
+
+tasks:
+  foo:
+    preconditions:
+      - test -f foo.txt
+
+  impossible:
+    preconditions:
+      - sh: "[ 1 = 0 ]"
+        msg: "1 != 0 obviously!"
+
+  depends_on_impossible:
+    deps:
+      - impossible
+
+  executes_failing_task_as_cmd:
+    cmds:
+      - task: impossible