gitcompare.yml

name: GitCompare

on:
  issue_comment:
    types: [created]

jobs:
  parse-comment:
    if: startsWith(github.event.comment.body, '.ch_gitcompare')
    runs-on: ubuntu-latest
    permissions:
      contents: read
      issues: write
      pull-requests: write
    outputs:
      good_build: ${{ steps.parse.outputs.good_build }}
      bad_build: ${{ steps.parse.outputs.bad_build }}
    steps:
      - name: Parse comment
        id: parse
        env:
          COMMENT_BODY: ${{ github.event.comment.body }}
        run: |
          echo "Comment body: $COMMENT_BODY"
          COMMENT=${COMMENT_BODY#.ch_gitcompare}

          if [[ $COMMENT =~ --good_build[[:space:]]+(.*)[[:space:]]+--bad_build[[:space:]]+(.*) ]]; then
            GOOD_BUILD="${BASH_REMATCH[1]}"
            BAD_BUILD="${BASH_REMATCH[2]}"
          else
            echo "Error: Invalid format. Please use: .ch_gitcompare --good_build <good_build> --bad_build <bad_build>"
            exit 1
          fi

          GOOD_BUILD=$(echo "$GOOD_BUILD" | sed 's/^[[:space:]]*//;s/[[:space:]]*$//' | sed 's/^"//;s/"$//')
          BAD_BUILD=$(echo "$BAD_BUILD" | sed 's/^[[:space:]]*//;s/[[:space:]]*$//' | sed 's/^"//;s/"$//')

          echo "Good build: '$GOOD_BUILD'"
          echo "Bad build: '$BAD_BUILD'"

          if [ -z "$GOOD_BUILD" ] || [ -z "$BAD_BUILD" ]; then
            echo "Error: Invalid format. Please use: .ch_gitcompare --good_build <good_build> --bad_build <bad_build>"
            exit 1
          fi

          {
            echo "good_build<<EOF"
            echo "$GOOD_BUILD"
            echo "EOF"
          } >> $GITHUB_OUTPUT

          {
            echo "bad_build<<EOF"
            echo "$BAD_BUILD"
            echo "EOF"
          } >> $GITHUB_OUTPUT

  compare:
    needs: parse-comment
    runs-on: ubuntu-latest
    permissions:
      contents: read
      issues: write
      pull-requests: write
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Run CommitHunter (Python)
        id: run_commit_hunter
        env:
          GOOD_BUILD: ${{ needs.parse-comment.outputs.good_build }}
          BAD_BUILD: ${{ needs.parse-comment.outputs.bad_build }}
        run: |
          cd CommitHunter
          echo "$GOOD_BUILD" > good.txt
          echo "$BAD_BUILD" > bad.txt
          echo "Running commit_hunter.py..."
          python3 commit_hunter.py "$(cat good.txt)" "$(cat bad.txt)" > output.txt
          echo "CommitHunter output:"
          cat output.txt

      - name: Parse URLs from output
        id: parse_urls
        run: |
          if [ -f "./CommitHunter/output.txt" ]; then
            echo "Found output file, parsing URLs..."
            cat ./CommitHunter/output.txt

            url_openj9=$(grep "OpenJ9:" ./CommitHunter/output.txt | awk '{print $2}')
            url_omr=$(grep "OMR:" ./CommitHunter/output.txt | awk '{print $2}')
            url_jcl=$(grep "JCL:" ./CommitHunter/output.txt | awk '{print $2}')

            echo "Parsed URLs:"
            echo "OpenJ9: $url_openj9"
            echo "OMR: $url_omr"
            echo "JCL: $url_jcl"

            echo "url_openj9=$url_openj9" >> $GITHUB_OUTPUT
            echo "url_omr=$url_omr" >> $GITHUB_OUTPUT
            echo "url_jcl=$url_jcl" >> $GITHUB_OUTPUT
          else
            echo "Error: output.txt not found in CommitHunter directory"
            ls -la ./CommitHunter/
            exit 1
          fi

      - name: Prepare comment
        run: |
          echo "## 🔍 GitCompare Results" > comment.md
          echo "" >> comment.md
          echo "### OpenJ9 Changes" >> comment.md
          echo "${{ steps.parse_urls.outputs.url_openj9 }}" >> comment.md
          echo "" >> comment.md
          echo "### OMR Changes" >> comment.md
          echo "${{ steps.parse_urls.outputs.url_omr }}" >> comment.md
          echo "" >> comment.md
          echo "### JCL Changes" >> comment.md
          echo "${{ steps.parse_urls.outputs.url_jcl }}" >> comment.md
          echo "" >> comment.md
          echo "> 💡 **Note:** These links show the differences between the specified builds."
          cat comment.md

      - name: Comment on PR
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          GITHUB_REPOSITORY: ${{ github.repository }}
          ISSUE_NUMBER: ${{ github.event.issue.number }}
        run: |
          pip install PyGithub
          python3 <<EOF
          import os
          import sys
          from github import Github

          try:
              with open("comment.md", "r", encoding="utf-8") as f:
                  comment_body = f.read()

              token = os.environ["GITHUB_TOKEN"]
              repo_name = os.environ["GITHUB_REPOSITORY"]
              issue_number = int(os.environ["ISSUE_NUMBER"])

              g = Github(token)
              repo = g.get_repo(repo_name)
              issue = repo.get_issue(number=issue_number)

              comment = issue.create_comment(comment_body)
              print(f"✅ Comment created successfully: {comment.html_url}")

          except Exception as e:
              print(f"❌ Error creating comment: {e}")
              print(f"Error type: {type(e).__name__}")
              sys.exit(1)
          EOF