Docker Extract

A GitHub Action for extracting files from a Docker Image.

- uses: shrink/actions-docker-extract@v1
  with:
    image: 'ghost:alpine'
    path: '/var/lib/ghost/current/core/built/assets/.'

Inputs

All inputs are required.

ID	Description	Examples
image	Docker Image to extract files from	alpine ghcr.io/github/super-linter:latest
path	Path (from root) to a file or directory within Image	files/example.txt files files/.

📎 To copy the contents of a directory the path must end with /. otherwise the directory itself will be copied. More information about the specific rules can be found via the docker cp documentation.

Outputs

ID	Description	Example
destination	Destination path containing the extracted file(s)	.extracted-1598717412/

Examples

Build, Extract

Using docker/build-push-action to build a Docker Image and then extract the contents of the /app directory within the newly built image to upload as a dist artifact.

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - name: Build Docker Image
        uses: docker/build-push-action@v1
        with:
          repository: my-example-image
          tags: latest
      - uses: shrink/actions-docker-extract@v1
        id: extract
        with:
          image: my-example-image
          path: /app/.
      - name: Upload Dist
        uses: actions/upload-artifact@v2
        with:
          path: ${{ steps.extract.outputs.destination }}
          name: dist

Login, Pull, Extract

Using docker/login-action to authenticate with the GitHub Container Registry to extract from a published Docker Image.

jobs:
  extract:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - name: Login to GitHub Container Registry
        uses: docker/login-action@v1
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.GHCR_PAT }}
      - uses: shrink/actions-docker-extract@v1
        id: extract
        with:
          image: ghcr.io/${{ github.repository }}:latest
          path: /app/.
      - name: Upload Dist
        uses: actions/upload-artifact@v2
        with:
          path: ${{ steps.extract.outputs.destination }}
          name: dist