💻 Publish a single Dev Container Feature

1️⃣ Publishes a single feature instead of a whole monorepo
🤝 Works well with Dev Container Feature polyrepos
0️⃣ Zero-config; sensible defaults

👀 Check out devcontainers-community/feature-starter for a template feature repo that uses this action.

To get started, just create a new GitHub Repository that has a valid devcontainer-feature.json manifest file and a working install.sh script. Then add this to a GitHub Workflow like .github/workflows/publish-feature.yml:

# publish-feature.yml
name: Publish feature
on:
  release:
    types: published
  workflow_dispatch:
concurrency:
  group: ${{ github.workflow }}
  cancel-in-progress: true
jobs:
  permissions:
    contents: read
    packages: write
  publish-feature:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - uses: devcontainers-community/publish-feature@v1

This will publish the Dev Container Feature to your-username/features/id-of-your-feature and can be used like this:

// devcontainer.json
{
  "features": {
    "ghcr.io/octocat/my-features/my-feature": {}
  }
}

• path: Where the devcontainer-feature.json manifest is located. The default is ..

• files: Which files to include in the OCI published image. You can specify a multiline list of glob patterns to include in the package. By default this includes everything. The README.md, LICENSE, and devcontainer-feature.json files will always be included in the generated image.

• source: What to put for the org.opencontainers.source annotation on the image. This defaults to the current GitHub repository using ${{ github.server_url }} and ${{ github.repository }}.

• image: The destination image to push to. You can use a * which will be replaced by the id field from the devcontainer-feature.json that was used. By default this is ghcr.io/${{ github.repository_owner }}/features/*

• latest: A boolean flag to indicate whether or not to push to the :latest tag of the image. By default this is true. Set this to false if you're publishing an older version.

This GitHub Action is written using Deno. At some point in the future, it may be transitioned to use plain Node.js. At present, though, we use a wrapper script to download the self-contained deno binary locally and then run the main.ts script.

To get started editing, fork this repo and make your changes. To test those changes, push them to your own main branch or open a PR! We use GitHub Actions-ception to test this Action using GitHub Actions.