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name: Java Codestyle

# Two Java style gates share this workflow:
#   * Checkstyle    -- whole-tree rule check (dev/checkstyle), on push and PR.
#   * Java Format   -- Eclipse formatter (dev/CodeStyle_eclipse.xml) applied to
#                      ONLY the lines a PR edits; fails if any edited line would
#                      change. The tree is not yet fully formatter-clean, so
#                      scoping to edited lines keeps it actionable and lets the
#                      codebase converge line-by-line. This gate needs the PR
#                      base commit, so it runs on pull_request only.
# They are separate jobs so each reports its own pass/fail status.

on:
  push:
    paths-ignore:
      - 'docs/**'
      - '*.md'
      - '*.html'
      - 'src/main/python/**'
    branches:
      - main
  pull_request:
    paths-ignore:
      - 'docs/**'
      - '*.md'
      - '*.html'
      - 'src/main/python/**'
    branches:
      - main

permissions:
  contents: read

concurrency:
  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
  cancel-in-progress: ${{ github.event_name == 'pull_request' }}

jobs:
  java_checkstyle:
    name: Java Checkstyle
    runs-on: ubuntu-latest
    steps:
    - name: Checkout Repository
      uses: actions/checkout@v7

    - name: Setup Java 17 adopt
      uses: actions/setup-java@v5
      with:
        distribution: adopt
        java-version: '17'
        cache: 'maven'

    - name: Run Checkstyle
      run: mvn -ntp -B -Dcheckstyle.skip=false checkstyle:check

  # java_format:
  #   name: Java Format Check
  #   # line-scoped to the PR diff -> needs the pull_request base commit
  #   if: github.event_name == 'pull_request'
  #   runs-on: ubuntu-latest
  #   steps:
  #   - name: Checkout Repository
  #     uses: actions/checkout@v7
  #     with:
  #       fetch-depth: 0

  #   - name: Setup Java 17 adopt
  #     uses: actions/setup-java@v5
  #     with:
  #       distribution: adopt
  #       java-version: '17'
  #       cache: 'maven'

  #   - name: Setup Python
  #     uses: actions/setup-python@v7
  #     with:
  #       python-version: '3.11'

  #   - name: Unit-test the format checker
  #     run: |
  #       python -m pip install --quiet pytest
  #       python -m pytest dev/tests -q

  #   - name: Check formatting of PR-edited lines
  #     env:
  #       BASE_SHA: ${{ github.event.pull_request.base.sha }}
  #     run: |
  #       # Fails only if the Eclipse formatter would change a line this PR edited.
  #       # See dev/format_changed.py for the line-scoping logic.
  #       if ! python3 dev/format_changed.py --check "$BASE_SHA"; then
  #         echo "::error::Some lines edited by this PR are not formatted per dev/CodeStyle_eclipse.xml."
  #         echo "Fix only your edited lines locally and commit the result:"
  #         echo ""
  #         echo "  dev/format-changed.sh"
  #         echo ""
  #         echo "(Do NOT run a bare 'mvn formatter:format' -- it reformats the whole tree.)"
  #         exit 1
  #       fi