change_impact.yml

name: ReqFlow Impact on PR Comment

on:
  issue_comment:
    types: [created]

jobs:
  run-change-impact:
    if: |
      github.event.issue.pull_request != null &&
      contains(github.event.comment.body, '/reqflow impact')
    runs-on: ubuntu-latest

    permissions:
      pull-requests: write
      issues: write
      contents: read

    steps:
      - name: React to trigger comment with
        uses: peter-evans/create-or-update-comment@v3
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          comment-id: ${{ github.event.comment.id }}
          reactions: '+1'
          
      - name: Checkout PR source branch
        uses: actions/checkout@v4
        with:
          ref: ${{ github.event.issue.pull_request.head.ref }}
          fetch-depth: 0  # needed for full commit history
              

      - name: Install Rust toolchain
        uses: actions-rs/toolchain@v1
        with:
          toolchain: stable
          override: true

      - name: Get Base Branch from PR using gh
        id: get_pr_base
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          BASE_BRANCH=$(gh pr view ${{ github.event.issue.number }} --json baseRefName --jq '.baseRefName')
          echo "Using base branch: $BASE_BRANCH"
          echo "BASE_BRANCH=$BASE_BRANCH" >> $GITHUB_ENV
          
      - name: Compute merge base commit
        id: base_commit
        run: |
          git fetch origin "$BASE_BRANCH"
          BASE_COMMIT=$(git merge-base origin/"$BASE_BRANCH" HEAD)
          echo "Base commit: $BASE_COMMIT"
          echo "BASE_COMMIT=$BASE_COMMIT" >> $GITHUB_ENV



      - name: Build reqflowcli from source
        run: |
          cargo build --release
          cp target/release/reqflow ./reqflow


      - name: Run ReqFlow Change Impact against PR base
        id: run_reqflow
        run: |
          mkdir output
          OUTPUT=$(./reqflow --change-impact --git-commit "$BASE_COMMIT" 2>&1 || echo "⚠️ reqflow failed.")
          echo "REQFLOW_OUTPUT<<EOF" >> $GITHUB_ENV
          echo "$OUTPUT" >> $GITHUB_ENV
          echo "EOF" >> $GITHUB_ENV
           
      - name: Comment on PR with result
        uses: peter-evans/create-or-update-comment@v3
        with:
          issue-number: ${{ github.event.issue.number }}
          body: |
            ${{ env.REQFLOW_OUTPUT }}