Merge pull request #201 from buildkite-plugins/add-build-aliases

Add build aliases

README.md

@@ -335,6 +335,10 @@ This option can also be configured on the agent machine using the environment va
 
 The name to use when tagging pre-built images. If multiple images are built in the build phase, you must provide an array of image names.
 
+### `build-alias` (optional, build only)
+
+Other docker-compose services that should be aliased to the main service that was built. This is for when different docker-compose services share the same prebuilt image.
+
 ### `args` (optional, build only)
 
 A list of KEY=VALUE that are passed through as build arguments when image is being built.

commands/build.sh

@@ -87,8 +87,16 @@ if [[ -n "$image_repository" ]] ; then
   echo "~~~ :docker: Pushing built images to $image_repository"
   retry "$push_retries" run_docker_compose -f "$override_file" push "${services[@]}"
 
+  # iterate over build images
   while [[ ${#build_images[@]} -gt 0 ]] ; do
     set_prebuilt_image "${build_images[0]}" "${build_images[1]}"
+
+    # set aliases
+    for service_alias in $(plugin_read_list BUILD_ALIAS) ; do
+      set_prebuilt_image "$service_alias" "${build_images[1]}"
+    done
+
+    # pop-off the last build image
     build_images=("${build_images[@]:3}")
   done
 fi

plugin.yml

@@ -29,6 +29,9 @@ configuration:
     args:
       type: [ string, array ]
       minimum: 1
+    build-alias:
+      type: [ string, array ]
+      minimum: 1
     image-repository:
       type: string
     image-name:

tests/build.bats

@@ -82,6 +82,36 @@ load '../lib/shared'
   unstub buildkite-agent
 }
 
+@test "Build with a repository and multiple build aliases" {
+  export BUILDKITE_JOB_ID=1111
+  export BUILDKITE_PLUGIN_DOCKER_COMPOSE_BUILD=myservice
+  export BUILDKITE_PLUGIN_DOCKER_COMPOSE_IMAGE_REPOSITORY=my.repository/llamas
+  export BUILDKITE_PLUGIN_DOCKER_COMPOSE_BUILD_ALIAS_0=myservice-1
+  export BUILDKITE_PLUGIN_DOCKER_COMPOSE_BUILD_ALIAS_1=myservice-2
+  export BUILDKITE_PIPELINE_SLUG=test
+  export BUILDKITE_BUILD_NUMBER=1
+
+  stub docker-compose \
+    "-f docker-compose.yml -p buildkite1111 -f docker-compose.buildkite-1-override.yml build --pull myservice : echo built myservice" \
+    "-f docker-compose.yml -p buildkite1111 -f docker-compose.buildkite-1-override.yml push myservice : echo pushed myservice" \
+
+  stub buildkite-agent \
+    "meta-data set docker-compose-plugin-built-image-tag-myservice my.repository/llamas:test-myservice-build-1 : echo set image metadata for myservice" \
+    "meta-data set docker-compose-plugin-built-image-tag-myservice-1 my.repository/llamas:test-myservice-build-1 : echo set image metadata for myservice-1" \
+    "meta-data set docker-compose-plugin-built-image-tag-myservice-2 my.repository/llamas:test-myservice-build-1 : echo set image metadata for myservice-2"
+
+  run $PWD/hooks/command
+
+  assert_success
+  assert_output --partial "built myservice"
+  assert_output --partial "pushed myservice"
+  assert_output --partial "set image metadata for myservice"
+  assert_output --partial "set image metadata for myservice-1"
+  assert_output --partial "set image metadata for myservice-2"
+  unstub docker-compose
+  unstub buildkite-agent
+}
+
 @test "Build with a repository and push retries" {
   export BUILDKITE_JOB_ID=1111
   export BUILDKITE_PLUGIN_DOCKER_COMPOSE_BUILD=myservice