name: Create SBOM for the release

run-name: Collecting SBOM for ${{ github.event.client_payload.agentSpec || 'unknown image' }} - ${{ github.event.client_payload.imageVersion || 'unknown version' }}

on:
  repository_dispatch:
    types: [generate-sbom]

defaults:
  run:
    shell: pwsh

jobs:
  sbom-check:
    outputs:
      check_status: ${{ steps.check.outputs.status }}
    runs-on: ubuntu-latest
    env:
      RELEASE_ID: ${{ github.event.client_payload.ReleaseID }}
    steps:
    - name: Check SBOM asset for release ${{ env.RELEASE_ID }}
      id: check
      shell: pwsh
      run: |
        $apiUrl = "https://api.github.com/repos/actions/runner-images/releases/$env:RELEASE_ID"
        $response = Invoke-RestMethod -Uri $apiUrl -Method Get -SkipHttpErrorCheck
        if ($response.message -ilike "Not Found") {
          echo "status=release_not_found" >> $env:GITHUB_OUTPUT
          Write-Error "Release $env:RELEASE_ID wasn't found"
          exit 1
        }
        foreach ($asset in $response.assets) {
          if ($asset.name -like '*sbom*') {
            echo "status=sbom_exists" >> $env:GITHUB_OUTPUT
            return "Release $env:RELEASE_ID already contains a SBOM"
          }
        }
        Write-Host "Release has been found, SBOM is not attached, starting generation."
        echo "status=okay" >> $env:GITHUB_OUTPUT

  building-sbom:
    needs: sbom-check
    if: ${{ needs.sbom-check.outputs.check_status == 'okay' }}
    runs-on: ${{ github.event.client_payload.agentSpec }}
    env:
      AGENT_SPEC: ${{ github.event.client_payload.agentSpec }}
      RELEASE_ID: ${{ github.event.client_payload.ReleaseID }}
      IMAGE_VERSION: ${{ github.event.client_payload.imageVersion }}
    steps:
      - name: Available image version check
        run: |
          $expectedVersion = $env:IMAGE_VERSION
          $runnerVersion = $env:ImageVersion
          
          # Split versions by dot
          $expectedParts = $expectedVersion.Split('.')
          $runnerParts = $runnerVersion.Split('.')

          # Determine what parts to compare
          $minLength = [Math]::Min($expectedParts.Length, $runnerParts.Length)
          $expectedComparable = $expectedParts[0..($minLength-1)] -join '.'
          $runnerComparable = $runnerParts[0..($minLength-1)] -join '.'
          
          # Perform the comparison
          if ($expectedComparable -ne $runnerComparable) {
            throw "Version mismatch: Expected version '$expectedVersion' doesn't match runner version '$runnerVersion'"
          }

      - name: Install SYFT tool on Windows
        if: ${{ runner.os == 'Windows' }}
        run: curl -sSfL https://raw.githubusercontent.com/anchore/syft/main/install.sh | sh -s -- -b C:/syft

      - name: Install SYFT tool on Ubuntu 
        if: ${{ runner.os == 'Linux' }}
        run: curl -sSfL https://raw.githubusercontent.com/anchore/syft/main/install.sh | sh -s -- -b /usr/local/bin

      - name: Install SYFT v1.24.0 on macOS
        if: ${{ runner.os == 'macOS' }}
        run: curl -sSfL https://raw.githubusercontent.com/anchore/syft/main/install.sh | sh -s -- -b /usr/local/bin v1.24.0
      
      - name: Run SYFT on Windows
        if: ${{ runner.os == 'Windows' }}
        run: C:/syft/syft dir:C:/ -vv -o spdx-json=sbom.json

      - name: Run SYFT on Ubuntu
        if: ${{ runner.os == 'Linux' }}
        run: syft dir:/ -vv -o spdx-json=sbom.json

      - name: Run SYFT on macOS
        if: ${{ runner.os == 'macOS' }}
        # Skip protected folders to avoid prompt privileges that block process indefinitely (https://github.com/anchore/syft/issues/1367)
        run: sudo syft dir:/ -vv -o spdx-json=sbom.json --exclude ./Users --exclude ./System/Volumes --exclude ./private
        shell: bash

      - name: Compress SBOM file
        run: Compress-Archive sbom.json sbom.json.zip

      - uses: actions/upload-artifact@v4
        with:
          name: sbom-${{ env.AGENT_SPEC }}-${{ env.IMAGE_VERSION }}
          path: sbom.json.zip
          if-no-files-found: warn

      - name: Upload release asset
        uses: actions/upload-release-asset@v1
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          upload_url: "https://uploads.github.com/repos/actions/runner-images/releases/${{ env.RELEASE_ID }}/assets{?name,label}"
          asset_path: ./sbom.json.zip
          asset_name: sbom.${{ env.AGENT_SPEC }}.json.zip
          asset_content_type: application/zip