name: Build ISO

# Full ISO build is ~15-20 min. Only run on push-to-main and manual
# dispatch so feature-branch iteration stays fast. See
# memory/project_ci_branching for the rationale.
on:
  push:
    branches: [main]
  workflow_dispatch:

concurrency:
  group: build-iso-${{ github.ref }}
  cancel-in-progress: true

jobs:
  build-iso:
    # Run directly on the runner host, not inside a job container.
    # `build.sh` does `docker run -v $REPO_ROOT:/work archlinux:latest`,
    # and host docker interprets the volume source as a host path — so
    # $REPO_ROOT has to be a path on the host, which it only is when
    # we skip the job-container wrapping. The runner VM has git + docker.
    runs-on: self-hosted
    timeout-minutes: 30
    steps:
      - uses: actions/checkout@v4

      - name: Build ISO
        run: ./iso/build.sh

      - name: Report ISO hash
        run: |
          iso=$(ls iso/out/*.iso | head -1)
          echo "ISO: $iso"
          sha256sum "$iso"

      - name: Upload ISO artifact
        # v4+ isn't supported on Forgejo yet (uses newer @actions/artifact
        # protocol that Forgejo's GHES-compatible API doesn't implement).
        uses: actions/upload-artifact@v3
        with:
          name: furtka-iso
          path: iso/out/*.iso
          retention-days: 14
          if-no-files-found: error