dokku/dokku

#!/usr/bin/env bash
set -eo pipefail
export DOKKU_ROOT=${DOKKU_ROOT:="/home/dokku"}
export PLUGIN_PATH=${PLUGIN_PATH:="/var/lib/dokku/plugins"}

[[ -f $DOKKU_ROOT/dokkurc ]] && source $DOKKU_ROOT/dokkurc

[[ $DOKKU_TRACE ]] && set -x

if [[ $(id -un) != "dokku" && $1 != plugins-install* ]]; then
  sudo -u dokku -H $0 "$@"
  exit
fi

case "$1" in
  receive)
    APP="$2"; IMAGE="dokku/$APP"
    echo "-----> Cleaning up ..."
    dokku cleanup
    echo "-----> Building $APP ..."
    cat | dokku build $APP
    echo "-----> Releasing $APP ..."
    dokku release $APP
    echo "-----> Deploying $APP ..."
    dokku deploy $APP
    echo "=====> Application deployed:"
    echo "       $(dokku url $APP)"
    echo
    ;;

  build)
    APP="$2"; IMAGE="dokku/$APP"; CACHE_DIR="$DOKKU_ROOT/$APP/cache"
    id=$(cat | docker run -i -a stdin progrium/buildstep /bin/bash -c "mkdir -p /app && tar -xC /app")
    test $(docker wait $id) -eq 0
    docker commit $id $IMAGE > /dev/null
    [[ -d $CACHE_DIR ]] || mkdir $CACHE_DIR
    pluginhook pre-build $APP
    id=$(docker run -d -v $CACHE_DIR:/cache $IMAGE /build/builder)
    docker attach $id
    test $(docker wait $id) -eq 0
    docker commit $id $IMAGE > /dev/null
    pluginhook post-build $APP
    ;;

  release)
    APP="$2"; IMAGE="dokku/$APP"
    pluginhook pre-release $APP
    if [[ -f "$DOKKU_ROOT/$APP/ENV" ]]; then
      id=$(cat "$DOKKU_ROOT/$APP/ENV" | docker run -i -a stdin $IMAGE /bin/bash -c "mkdir -p /app/.profile.d && cat > /app/.profile.d/app-env.sh")
      test $(docker wait $id) -eq 0
      docker commit $id $IMAGE > /dev/null
    fi
    pluginhook post-release $APP
    ;;

  deploy)
    APP="$2"; IMAGE="dokku/$APP"
    pluginhook pre-deploy $APP

    if [[ -f "$DOKKU_ROOT/$APP/CONTAINER" ]]; then
      oldid=$(< "$DOKKU_ROOT/$APP/CONTAINER")
    fi

    # start the app
    DOCKER_ARGS=$(: | pluginhook docker-args $APP)
    id=$(docker run -d -p 5000 -e PORT=5000 $DOCKER_ARGS $IMAGE /bin/bash -c "/start web")
    port=$(docker port $id 5000 | sed 's/[0-9.]*://')

    # if we can't post-deploy successfully, kill new container
    function kill_new {
      docker inspect $id &> /dev/null && docker kill $id > /dev/null
      trap - INT TERM EXIT
      kill -9 $$
    }

    # run checks first, then post-deploy hooks, which switches Nginx traffic
    trap kill_new INT TERM EXIT
    echo "-----> Running pre-flight checks"
    pluginhook check-deploy $id $APP $port

    # now using the new container
    echo $id > "$DOKKU_ROOT/$APP/CONTAINER"
    echo $port > "$DOKKU_ROOT/$APP/PORT"
    echo "http://$(< "$DOKKU_ROOT/HOSTNAME"):$port" > "$DOKKU_ROOT/$APP/URL"

    echo "-----> Running post-deploy"
    pluginhook post-deploy  $APP $port
    trap -        INT TERM EXIT

    # kill the old container
    if [[ -n "$oldid" ]]; then
      docker inspect $oldid &> /dev/null && docker kill $oldid > /dev/null
    fi

    ;;

  cleanup)
    # delete all non-running container
    docker ps -a | grep 'Exit' | awk '{print $1}' | xargs docker rm &> /dev/null &
    # delete unused images
    docker images | grep '<none>' | awk '{print $3}' | xargs docker rmi &> /dev/null &
    ;;

  plugins)
    ls -1 -d $PLUGIN_PATH/*/
    ;;

  plugins-install)
    pluginhook install
    ;;

  plugins-install-dependencies)
    pluginhook dependencies
    ;;

  # temporary hack for https://github.com/progrium/dokku/issues/82
  deploy:all)
    for app in $(ls -d $DOKKU_ROOT/*/); do
      APP=$(basename $app);
      dokku deploy $APP
    done
    ;;

  help|'')
    cat<<EOF | pluginhook commands help | sort
    help                                            Print the list of commands
    plugins                                         Print active plugins
    plugins-install                                 Install active plugins
EOF
    ;;

  *)
    for script in $(ls -d /var/lib/dokku/plugins/*/commands); do
      $script "$@"
    done
    ;;

esac