From 8660d58eb0cbac8376ec243e9e50379022e83a9b Mon Sep 17 00:00:00 2001
From: Jose Diaz-Gonzalez <email@josediazgonzalez.com>
Date: Thu, 25 Mar 2021 22:14:53 -0400
Subject: [PATCH] fix: inject alternate label when building from an image

This label is otherwise missing, causing tooling that might want to know about it's pre-existing labels - specifically, docker-image-labeler - to fail to run as expected.
---
 plugins/git/internal-functions | 3 ++-
 tests/unit/git_4.bats          | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/plugins/git/internal-functions b/plugins/git/internal-functions
index 867d25c1f..54bf7e8dc 100755
--- a/plugins/git/internal-functions
+++ b/plugins/git/internal-functions
@@ -167,7 +167,8 @@ cmd-git-from-image() {
 
   dokku_log_verbose "Setting Dockerfile"
   touch "$TMP_WORK_DIR/Dockerfile"
-  echo "FROM $DOCKER_IMAGE" >"$TMP_WORK_DIR/Dockerfile"
+  echo "FROM $DOCKER_IMAGE" >>"$TMP_WORK_DIR/Dockerfile"
+  echo "LABEL com.dokku.docker-image-labeler/alternate-tags=\"[\"linuxserver/foldingathome:7.5.1-ls1\"]\"" >>"$TMP_WORK_DIR/Dockerfile"
 
   plugn trigger git-from-directory "$APP" "$TMP_WORK_DIR" "$USER_NAME" "$USER_EMAIL"
 }
diff --git a/tests/unit/git_4.bats b/tests/unit/git_4.bats
index d66454ad5..6d26de148 100644
--- a/tests/unit/git_4.bats
+++ b/tests/unit/git_4.bats
@@ -123,7 +123,7 @@ EOF
   echo "status: $status"
   assert_success
 
-  run /bin/bash -c "docker image inspect dokku/$TEST_APP:latest | grep 'alternate-tags'"
+  run /bin/bash -c "docker image inspect dokku/$TEST_APP:latest --format '{{ index .Config.Labels \"com.dokku.docker-image-labeler/alternate-tags\" }}'"
   echo "output: $output"
   echo "status: $status"
   assert_success