build_extra_args json syntax does not handle multiple args

[MaximeMYCS]

Using this Dockerfile:

FROM ubuntu:20.04 as test_image
ARG BRANCH
ARG ENV_NAME
RUN echo "${BRANCH}"
RUN echo "${ENV_NAME}"

And this workflow:

name: Test
on:
  push:
    paths:
    - ".github/workflows/test.yml"
    - "build/Dockerfile"

jobs:
  build-test:
    name: Test
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v2

      - name: Build test image
        uses: whoan/docker-build-with-cache-action@v5
        with:
          image_name: test_image
          build_extra_args: '{"--build-arg": "BRANCH=foo", "--build-arg": "ENV_NAME=haha"}'
          dockerfile: build/Dockerfile
          push_image_and_stages: false

It seems that the build arguments are not passed correctly: only the last one is kept. Below is the docker command line issued from the run of this workflow.

docker build --tag my_awesome_image --file ./build/Dockerfile --build-arg ENV_NAME=haha .

Is it because of a wrong syntax in the json description of arguments ? It seems to be working fine for a single argument but I haven't been able to make it work for more than one.

Thanks for your help.

[jschmidtnj]

I wrote something to fix the issue (see https://github.com/jschmidtnj/docker-build-with-cache-action/commit/562d9b5fb9d7816f93a3526a4aaa79859b850403). It's sort of a hack, but I couldn't figure out a way to get jq to accept duplicate keys (see https://github.com/stedolan/jq/issues/1636). to use it, just append -0, or a dash followed by any unique number, to the end of a duplicated flag. for 2 build-args, it would be --build-arg-0 and --build-arg-1, etc.

[AndreuJove]

Hi guys I'm facing the same error, Do we have any update on this?

• INPUT:

• OUTPUT:

---

Using --build-arg-0 is not either working:

• INPUT:

• OUTPUT: