build-definition.yml

name: Build changed definitions

on:
  pull_request:
    paths:
      - 'rubies/**'

jobs:
  build:
    runs-on: ubuntu-latest
    name: Build changed definitions
    steps:
      - uses: actions/checkout@v6
        with:
          fetch-depth: 0

      - name: Detect changed definitions
        id: changed
        run: |
          files=$(git diff --name-only --diff-filter=ACMR origin/${{ github.base_ref }}...HEAD -- rubies/)
          defs=$(echo "$files" | sed 's|^rubies/||' | grep -v '^truffleruby' | grep -v '^$' || true)
          if [ -z "$defs" ]; then
            echo "No CRuby definitions changed"
            echo "has_definitions=false" >> "$GITHUB_OUTPUT"
          else
            echo "Changed definitions:"
            echo "$defs"
            echo "has_definitions=true" >> "$GITHUB_OUTPUT"
            echo "$defs" > /tmp/changed-definitions.txt
          fi

      - name: Install build dependencies
        if: steps.changed.outputs.has_definitions == 'true'
        run: |
          sudo apt-get update
          sudo apt-get install -y --no-install-recommends \
            autoconf bison build-essential \
            libssl-dev libyaml-dev libreadline-dev libffi-dev libgdbm-dev libncurses-dev zlib1g-dev

      - name: Install ruby-build
        if: steps.changed.outputs.has_definitions == 'true'
        run: |
          git clone --depth 1 https://github.com/rbenv/ruby-build.git /tmp/ruby-build
          sudo /tmp/ruby-build/install.sh

      - name: Build definitions
        if: steps.changed.outputs.has_definitions == 'true'
        run: |
          failed=0
          while IFS= read -r def; do
            echo "::group::Build $def"
            if RUBY_BUILD_DEFINITIONS=$GITHUB_WORKSPACE/rubies \
                ruby-build "$def" "/tmp/ruby-$def"; then
              "/tmp/ruby-$def/bin/ruby" --version
            else
              echo "::error::Build failed for $def"
              failed=1
            fi
            echo "::endgroup::"
          done < /tmp/changed-definitions.txt
          exit "$failed"