ci_manager.yml

on:
  pull_request:

name: CI manager

# cancel current runs when a new commit is pushed
concurrency:
    group: ${{ github.workflow }}-${{ github.ref }}
    cancel-in-progress: true

jobs:
    check-changes:
        runs-on: ubuntu-22.04
        outputs:
            run_tests: ${{ steps.filecheck.outputs.run_tests }}
        steps:
            - name: Checkout
              uses: actions/checkout@v4

            - name: Check if only css, html or md files changed
              id: check_ignored_files
              run: |
                git fetch origin ${{ github.base_ref }}
                if git diff --name-only origin/${{ github.base_ref }} HEAD | grep -qvE '(\.md$|\.css$|\.html$|^AUTHORS$)'; then
                    echo "should_run_tests=y" >> $GITHUB_OUTPUT
                else
                    echo "should_run_tests=n" >> $GITHUB_OUTPUT
                fi

            - name: Check if only comments changed in rust files
              id: check_rs_comments
              run: |
                git fetch origin ${{ github.base_ref }}
                if git diff --name-only origin/${{ github.base_ref }} HEAD | grep -qvE '(\.md$|\.css$|\.html$|^AUTHORS$|\.rs|\.roc)'; then
                    echo "should_run_tests=y" >> $GITHUB_OUTPUT
                else
                  if git diff --unified=0 origin/${{ github.base_ref }} HEAD '*.rs' | grep -E --color=never '^[+-]' | grep -qvE '^(\+\+\+|\-\-\-|[+-]\s*($|\/\/|\/\*.*\*\/\s*$))'; then
                      echo "should_run_tests=y" >> $GITHUB_OUTPUT
                  else
                      echo "should_run_tests=n" >> $GITHUB_OUTPUT
                  fi
                fi

            - name: Check if only comments changed in roc files
              id: check_roc_comments
              run: |
                git fetch origin ${{ github.base_ref }}
                if git diff --name-only origin/${{ github.base_ref }} HEAD | grep -qvE '(\.md$|\.css$|\.html$|^AUTHORS$|\.rs|\.roc)'; then
                    echo "should_run_tests=y" >> $GITHUB_OUTPUT
                else
                  if git diff --unified=0 origin/${{ github.base_ref }} HEAD '*.roc' | grep -E --color=never '^[+-]' | grep -qvE '^(\+\+\+|\-\-\-|[+-]\s*($|#))'; then
                      echo "should_run_tests=y" >> $GITHUB_OUTPUT
                  else
                      echo "should_run_tests=n" >> $GITHUB_OUTPUT
                  fi
                fi

            - name: Check if tests need to run based on earlier checks
              id: filecheck
              run: |
                if [ ${{ steps.check_ignored_files.outputs.should_run_tests }} = "y" ]; then
                  if [ ${{ steps.check_rs_comments.outputs.should_run_tests }} = "y" ]; then
                      echo "run_tests=full" >> $GITHUB_OUTPUT
                  else
                    if [ ${{ steps.check_roc_comments.outputs.should_run_tests }} = "y" ]; then
                      echo "run_tests=full" >> $GITHUB_OUTPUT
                    else
                      echo "run_tests=none" >> $GITHUB_OUTPUT
                    fi
                  fi
                else
                  echo "run_tests=none" >> $GITHUB_OUTPUT
                fi

            - run: echo "debug output ${{ steps.filecheck.outputs.run_tests }}"

    start-nix-linux-x86-64-tests:
        needs: check-changes
        if: needs.check-changes.outputs.run_tests == 'full'
        uses: ./.github/workflows/nix_linux_x86_64.yml

    start-nix-linux-aarch64-build-default-test:
        needs: check-changes
        if: needs.check-changes.outputs.run_tests == 'full'
        uses: ./.github/workflows/nix_linux_arm64_default.yml

    start-nix-linux-aarch64-cargo-build-test:
        needs: check-changes
        if: needs.check-changes.outputs.run_tests == 'full'
        uses: ./.github/workflows/nix_linux_arm64_cargo.yml

    start-nix-macos-apple-silicon-tests:
        needs: check-changes
        if: needs.check-changes.outputs.run_tests == 'full'
        uses: ./.github/workflows/nix_macos_apple_silicon.yml

    start-macos-x86-64-tests:
        needs: check-changes
        if: needs.check-changes.outputs.run_tests == 'full'
        uses: ./.github/workflows/macos_x86_64.yml

    start-ubuntu-x86-64-tests:
        needs: check-changes
        if: needs.check-changes.outputs.run_tests == 'full'
        uses: ./.github/workflows/ubuntu_x86_64.yml

    start-windows-release-build-test:
        needs: check-changes
        if: needs.check-changes.outputs.run_tests == 'full'
        uses: ./.github/workflows/windows_release_build.yml

    start-windows-tests:
        needs: check-changes
        if: needs.check-changes.outputs.run_tests == 'full'
        uses: ./.github/workflows/windows_tests.yml

    start-roc-benchmarks:
        needs: check-changes
        if: needs.check-changes.outputs.run_tests == 'full'
        uses: ./.github/workflows/benchmarks.yml

    ran-full:
        runs-on: ubuntu-22.04
        needs: [
                start-nix-linux-x86-64-tests,
                start-nix-linux-aarch64-build-default-test,
                start-nix-linux-aarch64-cargo-build-test,
                start-nix-macos-apple-silicon-tests,
                start-macos-x86-64-tests,
                start-ubuntu-x86-64-tests,
                start-windows-release-build-test,
                start-windows-tests,
                start-roc-benchmarks
            ]
        steps:
            - run: echo "all workflows succeeded!"

    ran-none:
        runs-on: ubuntu-22.04
        needs: [check-changes]
        if: needs.check-changes.outputs.run_tests == 'none'
        steps:
            - run: echo "Only non-code files changed and/or rs and/or roc comment lines changed. CI manager did not run any workflows."

    # we need a single end job for the required checks under branch protection rules
    finish:
      runs-on: ubuntu-22.04
      needs: [ran-full, ran-none]
      if: |
        always()
      steps:
        - name: Check previous job results
          run: |
            if [ "${{ needs.ran-full.result }}" != "success" ] && [ "${{ needs.ran-none.result }}" != "success" ]; then
              echo "One or more jobs failed."
              exit 1
            fi

        - run: echo "Workflow succeeded :)"