name: lint-checks
description: >
  Node formatting, linting, and conventional-commit checks: prettier
  (`format:check`) and eslint (`lint`) npm scripts, each `--if-present`,
  plus commitlint if the repo has a commitlint config. Run after
  actions/checkout and npm ci (e.g. after node-checks), in a job with node
  available.
runs:
  using: composite
  steps:
    - run: npm run format:check --if-present
      shell: bash
    - run: npm run lint --if-present
      shell: bash
    - shell: bash
      env:
        GITHUB_EVENT_NAME: ${{ github.event_name }}
        GITHUB_BASE_REF: ${{ github.base_ref }}
      run: |
        set -euo pipefail
        if ls commitlint.config.* .commitlintrc* >/dev/null 2>&1; then
          if [ "$GITHUB_EVENT_NAME" = "pull_request" ]; then
            git fetch origin "$GITHUB_BASE_REF" --depth=1
            npx --yes commitlint --from "origin/$GITHUB_BASE_REF" --to HEAD
          else
            npx --yes commitlint --from HEAD~1 --to HEAD
          fi
        else
          echo "no commitlint config found, skipping conventional-commit check"
        fi