tsc-check.yml

name: Check for New TypeScript Errors

on:
  workflow_dispatch:
  pull_request:
    branches:
      - main
      - test-action

jobs:
  check-tsc-errors:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout the repository
        uses: actions/checkout@v3

      - name: Fetch branches
        run: git fetch origin ${{ github.base_ref }}:${{ github.base_ref }} ${{ github.head_ref }}:${{ github.head_ref }}

      - name: Extract base branch name
        run: |
          branch=${{ github.base_ref }}
          branch=${branch//\//}  # This removes all slashes from the branch name
          echo "branch=${branch}" >> $GITHUB_OUTPUT
        id: extract_branch

      # - name: Download base tsc output artifact
      #   uses: actions/download-artifact@v2
      #   with:
      #     name: ${{ steps.extract_branch.outputs.branch }}-tsc-output
      #     path: artifact-tsc-output.txt
      #   continue-on-error: true

      # - name: Check if base artifact exists
      #   id: check_tsc_output
      #   run: |
      #     if [ -d artifact-tsc-output.txt ]; then
      #       echo "base branch artifact found"
      #       cp artifact-tsc-output.txt base-tsc-output.txt
      #       echo "tsc_output_exists=true" >> $GITHUB_ENV
      #     else
      #       echo "base branch artifact not found"
      #       echo "tsc_output_exists=false" >> $GITHUB_ENV
      #     fi

      - name: Checkout base branch
        # if: env.tsc_output_exists == 'false'
        run: git checkout ${{ github.base_ref }}

      - name: Install dependencies for base branch
        # if: env.tsc_output_exists == 'false'
        uses: ./.github/actions/setup

      - name: Generate base branch tsc output
        # if: env.tsc_output_exists == 'false'
        run: |
          echo "Running tsc"
          npx tsc --noEmit --pretty false --p tsconfig.json 2> base-tsc-output.txt || true
          cat base-tsc-output.txt

      # - name: Upload base tsc output as artifact
      #   if: env.tsc_output_exists == 'false'
      #   uses: actions/upload-artifact@v2
      #   with:
      #     name: ${{ steps.extract_branch.outputs.branch }}-tsc-output
      #     path: base-tsc-output.txt

      - name: Checkout PR branch
        run: git checkout ${{ github.head_ref }}

      - name: Install dependencies for PR branch
        uses: ./.github/actions/setup

      - name: Run tsc on PR branch
        run: |
          npx tsc --noEmit --pretty false --p tsconfig.json > head-tsc-output.txt || true

      - name: Check both tsc outputs exist
        run: |
          if [ ! -f base-tsc-output.txt ]; then
            echo "Base output file not found!"
            exit 1
          fi
          if [ ! -f head-tsc-output.txt ]; then
            echo "PR output file not found!"
            exit 1
          fi

      - name: Compare base errors with PR errors
        run: |
          diff_output=$(diff -u base-tsc-output.txt head-tsc-output.txt | grep -E '^\+' | grep -vE '^\+\+\+|^---')

          if [ -n "$diff_output" ]; then
            echo "New TypeScript errors introduced:"
            echo "$diff_output"
            exit 1
          else
            echo "No new TypeScript errors introduced."
          fi