name: cut-release

on:
  push:
    tags:
      - "v*"

concurrency: cut-release

permissions: read-all

jobs:
  release:
    permissions:
      contents: write # needed to write releases
      id-token: write # needed for keyless signing
      packages: write # needed for pushing the images to ghcr.io
    runs-on: ubuntu-latest
    outputs:
      hashes: ${{ steps.hash.outputs.hashes }}
      tag_name: ${{ steps.tag.outputs.tag_name }}
    steps:
      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1

      - uses: actions/setup-go@0c52d547c9bc32b1aa3301fd7a9cb496313a4491 # v5.0.0
        with:
          go-version-file: './go.mod'
          check-latest: true

      - uses: sigstore/cosign-installer@e1523de7571e31dbe865fd2e80c5c7c23ae71eb4 # v3.4.0
      - uses: anchore/sbom-action/download-syft@b6a39da80722a2cb0ef5d197531764a89b5d48c3 # v0.15.8
      - uses: imjasonh/setup-ko@ace48d793556083a76f1e3e6068850c1f4a369aa # v0.6

      - name: Set LDFLAGS
        id: ldflags
        run: |
           source ./release/ldflags.sh
           goflags=$(ldflags)
           echo "GO_FLAGS="${goflags}"" >> "$GITHUB_ENV"

      - name: Run GoReleaser
        id: run-goreleaser
        uses: goreleaser/goreleaser-action@7ec5c2b0c6cdda6e8bbb49444bc797dd33d74dd8 # v5.0.0
        with:
          version: latest
          args: release --clean
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          LDFLAGS: ${{ env.GO_FLAGS }}

      - name: Generate subject
        id: hash
        env:
          ARTIFACTS: "${{ steps.run-goreleaser.outputs.artifacts }}"
        run: |
          set -euo pipefail
          checksum_file=$(echo "$ARTIFACTS" | jq -r '.[] | select (.type=="Checksum") | .path')
          echo "hashes=$(cat $checksum_file | base64 -w0)" >> "$GITHUB_OUTPUT"
      
      - name: Set tag output
        id: tag
        run: echo "tag_name=${GITHUB_REF#refs/*/}" >> "$GITHUB_OUTPUT"

  provenance:
    needs: [release]
    permissions:
      actions: read # To read the workflow path.
      id-token: write # To sign the provenance.
      contents: write # To add assets to a release.
    uses: slsa-framework/slsa-github-generator/.github/workflows/generator_generic_slsa3.yml@v1.9.0
    with:
      base64-subjects: "${{ needs.release.outputs.hashes }}"
      upload-assets: true
      upload-tag-name: "${{ needs.release.outputs.tag_name }}" # Upload to tag rather than generate a new release
      draft-release: true