neiam /gitgud

name: build
on:
  push:
    branches: [master]
    # tags: ['v*']

jobs:
  build:
    runs-on: self-hosted
    steps:
      - uses: actions/checkout@v4

      - uses: docker/setup-buildx-action@v3

      # Forge-managed registry auth: the per-job token (github.token) is
      # accepted by /v2/token and authorized to push this repo's own
      # image — no stored creds. The username is ignored by the token
      # endpoint but login-action requires it to be non-empty.
      - uses: docker/login-action@v3
        with:
          registry: ${{ vars.CI_REGISTRY }}
          username: gitgud-actions
          password: ${{ github.token }}

      # Push to the job's OWN repo path (<registry>/<owner>/<repo>); the
      # per-job token only grants push there. metadata-action reads repo +
      # commit metadata from the forge's /api/v1 REST API (Api.V1.RepositoryController).
      - uses: docker/metadata-action@v5
        id: meta
        with:
          images: ${{ vars.CI_REGISTRY }}/${{ github.repository }}
          tags: |
            type=sha,format=long
            type=ref,event=branch
            type=raw,value=latest,enable={{is_default_branch}}

      - uses: docker/build-push-action@v6
        with:
          context: .
          file: ./Dockerfile
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=registry,ref=${{ vars.CI_REGISTRY }}/${{ github.repository }}:buildcache
          cache-to: type=registry,ref=${{ vars.CI_REGISTRY }}/${{ github.repository }}:buildcache,mode=max