check-casing-changes.yml

# Validates that PRs don't introduce unintentional casing changes to type/enum names,
# members, or properties in CSDL schema files. After a PR merges, automatically
# regenerates the type-mapping baseline files to keep them current.

name: Check type and enum casing changes

on:
  push:
    branches: [ master ]
    paths:
      - 'schemas/*-Prod.csdl'
  pull_request:
    branches: [ master ]
    paths:
      - 'schemas/*-Prod.csdl'

jobs:
  # Runs on PRs: compares modified CSDL files against the committed type-mapping
  # JSON baselines. Fails if any name matches case-insensitively but differs
  # case-sensitively (e.g., "accessLevel" -> "AccessLevel"). New types are allowed.
  check-casing:
    if: github.event_name == 'pull_request'
    runs-on: ubuntu-latest

    steps:
    - uses: actions/checkout@v6
      with:
        fetch-depth: 0

    - name: Determine modified Prod CSDL files
      id: changed-files
      run: |
        FILES=$(git diff --diff-filter=ACMR --name-only origin/${{ github.base_ref }}...HEAD -- 'schemas/*-Prod.csdl' | tr '\n' ',' | sed 's/,$//')
        echo "files=$FILES" >> $GITHUB_OUTPUT
        echo "Modified CSDL files: $FILES"

    - name: Check for casing changes
      if: steps.changed-files.outputs.files != ''
      shell: pwsh
      run: |
        $files = "${{ steps.changed-files.outputs.files }}" -split ','
        ./scripts/check-casing-changes.ps1 -CsdlFiles $files

  # Runs on push to master (after PR merge): regenerates the type-mapping baseline
  # JSON files from the updated CSDL schemas and auto-commits them if changed.
  # This keeps baselines current so future PRs are checked against the latest state.
  update-baselines:
    if: github.event_name == 'push'
    runs-on: ubuntu-latest
    permissions:
      contents: write

    steps:
    - uses: actions/checkout@v6

    - name: Regenerate type mapping baselines
      shell: pwsh
      run: ./scripts/generate-type-mappings.ps1

    - name: Check for changes
      id: check-changes
      run: |
        if git diff --quiet schemas/type-mappings/; then
          echo "changed=false" >> $GITHUB_OUTPUT
          echo "No baseline changes detected."
        else
          echo "changed=true" >> $GITHUB_OUTPUT
          echo "Baseline changes detected."
        fi

    - name: Commit updated baselines
      if: steps.check-changes.outputs.changed == 'true'
      run: |
        git config user.name "github-actions[bot]"
        git config user.email "github-actions[bot]@users.noreply.github.com"
        git add schemas/type-mappings/
        git commit -m "Update type mapping baselines

        Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>"
        git push