.git missing inside container?

[bastelfreak]

Troubleshooting

Before sumbitting a bug report please read the Troubleshooting doc.

Behaviour

Steps to reproduce this issue

1. Create a Dockerfile with RUN git describe --always > VERSION
2. See it working locally
3. see it failing on github actions

Expected behaviour

I expect that this works properly

Actual behaviour

I see the following in the error log:

#10 [ 7/11] RUN git describe --always > VERSION
#10 sha256:50f59aab7c36de632d818d4b6c44ba392fbde9110e40393f9834bd372996bc46
#10 0.093 fatal: not a git repository (or any of the parent directories): .git
#10 ERROR: executor failed running [/bin/sh -c git describe --always > VERSION]: exit code: 128
------
 > [ 7/11] RUN git describe --always > VERSION:
------
Dockerfile:13
--------------------
  11 |     ADD . /vpt
  12 |     
  13 | >>> RUN git describe --always > VERSION
  14 |     
  15 |     RUN gem install bundler \
--------------------
error: failed to solve: rpc error: code = Unknown desc = executor failed running [/bin/sh -c git describe --always > VERSION]: exit code: 128
Error: buildx call failed with: error: failed to solve: rpc error: code = Unknown desc = executor failed running [/bin/sh -c git describe --always > VERSION]: exit code: 128

Configuration

• Repository URL (if public): https://github.com/voxpupuli/vox-pupuli-tasks/blob/master/.github/workflows/test-build-release.yml
• Build URL (if public): https://github.com/voxpupuli/vox-pupuli-tasks/actions/runs/903156914

name: test-build-release

on:
  push:
    branches: master

jobs:
  test:

    runs-on: ubuntu-latest
    env:
      BUNDLE_WITHOUT: development

    steps:
    - uses: actions/checkout@v2
    - name: Set up Ruby
      uses: ruby/setup-ruby@v1
      with:
        ruby-version: 2.7
        bundler-cache: true
    - name: Run tests
      run: bundle exec rake rubocop
    - name: Set up Docker Buildx
      uses: docker/setup-buildx-action@v1
    - name: Login to DockerHub
      uses: docker/login-action@v1
      with:
        username: ${{ secrets.DOCKERHUB_USERNAME }}
        password: ${{ secrets.DOCKERHUB_TOKEN }}
    - name: Build and push Docker images
      uses: docker/build-push-action@v2
      with:
        push: true
        tags: latest

Logs

build.log

My guess here is that the .git directory is not available within the container. I did some digging in the code I'm not sure if my guess is correct.

[crazy-max]

@bastelfreak That's the expected behavior if you're using the Git context (default behavior for this action if no context is defined). Use path context instead:

    - name: Build and push Docker images
      uses: docker/build-push-action@v2
      with:
        context: .
        push: true
        tags: latest

or set build arg BUILDKIT_CONTEXT_KEEP_GIT_DIR=1:

    - name: Build and push Docker images
      uses: docker/build-push-action@v2
      with:
        push: true
        build-args: |
          BUILDKIT_CONTEXT_KEEP_GIT_DIR=1
        tags: latest