Using Docker heredoc with Google Cloud

Question

It's been a while since Docker introduced the ability to use heredoc in the RUN command, and I use it quite often.

However, when I tried to use it with Cloud Run, it seems that this feature is not supported, or do I need to do something to enable it?

Example:

FROM ubuntu:jammy

RUN <<EOF
apt-get update
apt-get upgrade -y
apt-get install -y build-essential cmake git python3 python3-pip wget zip
pip install conan
conan profile detect
EOF

I get the error:

Error response from daemon: dockerfile parse error line 13: unknown instruction: APT-GET

Answer 1

Unfortunately, we can't expect much from Google, so I chose to build the image in GitHub Actions, push it to the registry, and then point the Run to the new image.

- name: Build and push
  uses: docker/build-push-action@v5
  with:
    context: .
    push: true
    tags: ${{ secrets.REGISTRY }}/${{ secrets.SERVICE_NAME }}:latest
    cache-from: type=gha
    cache-to: type=gha,mode=max