Merge pull request #7 from dodizzle/master

Added build-args for the docker build

ReadMe.md

@@ -37,6 +37,9 @@ The docker build context. Default: `.`
 ### `target`
 If you use multi-stage build and want to stop builing at a certain image, you can use this field. Default value is empty.
 
+### `build_args`
+Pass a list of env vars as build-args for docker-build, separated by commas. ie: `HOST=db.default.svc.cluster.local:5432,USERNAME=db_user`
+
 ## Example usage
 Put desired yml section in the `.github/workflows/build.yml` file
 ### [`To perform build & push on every git push`](https://github.com/RafikFarhad/example/build.yml)

action.yml

@@ -11,7 +11,7 @@ inputs:
   registry:
     description: The registry where the image should be pushed
     required: false
-    default: gcr.io
+    default: 'gcr.io'
   project_id:
     description: The project id
     required: true
@@ -31,11 +31,14 @@ inputs:
   context:
     description: Docker build context
     required: false
-    default: .
+    default: '.'
   target:
     description: Mutli-staged build target
     required: false
     default: ""
+  build_args:
+    description: "Pass a list of env vars as build-args for docker-build, separated by commas"
+    required: false
 runs:
   using: docker
   image: Dockerfile

entrypoint.sh

@@ -46,9 +46,17 @@ echo "Building image ..."
 
 [ -z $INPUT_DOCKERFILE ] && FILE_ARG="" || FILE_ARG="--file $INPUT_DOCKERFILE"
 
-echo "docker build $TARGET_ARG -t $TEMP_IMAGE_NAME $INPUT_CONTEXT $FILE_ARG"
 
-if docker build $TARGET_ARG -t $TEMP_IMAGE_NAME $INPUT_CONTEXT $FILE_ARG; then
+if [ ! -z "$INPUT_BUILD_ARGS" ]; then
+  for ARG in $(echo "$INPUT_BUILD_ARGS" | tr ',' '\n'); do
+    BUILD_PARAMS="$BUILD_PARAMS --build-arg ${ARG}"
+  done
+fi
+
+echo "docker build $BUILD_PARAMS $TARGET_ARG -t $TEMP_IMAGE_NAME $FILE_ARG $INPUT_CONTEXT"
+
+
+if docker build $TARGET_ARG -t $TEMP_IMAGE_NAME $FILE_ARG $INPUT_CONTEXT; then
     echo "Image built ..."
 else
     echo "Image building failed. Exiting ..."

example/build_all_option.yml

@@ -14,3 +14,5 @@ jobs:
           dockerfile: ./docker/Dockerfile.prod
           target: prod
           context: ./docker
+          build_args: A=foo,B=bar
+