image.yaml

name: image

on:
  push:
    branches:
      - 'main'
  workflow_dispatch:

permissions:
  contents: read
  packages: write
  id-token: write

jobs:
  image:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
      - uses: actions/setup-go@41dfa10bad2bb2ae585af6ee5bb4d7d973ad74ed # v5.1.0
        with:
          go-version-file: 'go.mod'
          check-latest: true
      - uses: sigstore/cosign-installer@dc72c7d5c4d10cd6bcb8cf6e3fd625a9e5e537da # v3.7.0

      # Build ko from HEAD, build and push an image tagged with the commit SHA,
      # then keylessly sign it with cosign.
      - name: Publish and sign image
        env:
          KO_DOCKER_REPO: ghcr.io/${{ github.repository }}
        run: |
          go build ./
          echo "${{ github.token }}" | ./ko login ghcr.io --username "${{ github.actor }}" --password-stdin
          img=$(./ko build --bare --platform=all -t latest -t ${{ github.sha }} ./)
          echo "built ${img}"
          cosign sign ${img} --yes \
              -a sha=${{ github.sha }} \
              -a run_id=${{ github.run_id }} \
              -a run_attempt=${{ github.run_attempt }}