name: Go mod tidy check

on:
  workflow_dispatch:
  push:
    branches:
      - main
      - "release/**"
    paths:
      - "**.go"
      - "**/go.mod"
      - "**/go.sum"
      - ".github/workflows/test-tidy.yml"
  pull_request:
    paths:
      - "**.go"
      - "**/go.mod"
      - "**/go.sum"
      - ".github/workflows/test-tidy.yml"

jobs:
  gotidycheck:
    name: Go mod tidy check
    runs-on: ubuntu-22.04
    steps:
      - name: Checkout
        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # v3.3.0
        with:
          ref: ${{ !github.event.pull_request.head.repo.fork && github.head_ref || '' }}
          # No token available for forks, so we can't push changes
          token: ${{ !github.event.pull_request.head.repo.fork && secrets.CI_COMMIT_PUSH_PR || '' }}

      - name: Run Bazel tidy
        shell: bash
        run: |
          bazelisk run //bazel/ci:tidy
          bazelisk run //:gazelle-check

      - name: Check if tidy made modifications
        id: tidycheck
        shell: bash
        run: |
          diff=$(git diff)
          if [[ -z "$diff" ]]; then
            echo "Everything is tidy"
            exit 0
          fi
          cat << EOF >> "${GITHUB_STEP_SUMMARY}"
          \`\`\`diff
          ${diff}
          \`\`\`
          EOF
          echo "::error::The repo is not tidy. Please run 'bazel run bazel/ci:tidy' and commit the changes."
          exit 1

      # The following steps are only executed if the previous tidy check failed
      # and the action runs on an renovat branche. In this case, we tidy all
      # modules again and commit the changes, so the user doesn't need to do it.

      - name: Push changes
        if: |
          failure() &&
          (steps.tidycheck.conclusion == 'failure') &&
          startsWith(github.head_ref, 'renovate/') &&
          !github.event.pull_request.head.repo.fork
        shell: bash
        run: |
          git config --global user.name "edgelessci"
          git config --global user.email "edgelessci@users.noreply.github.com"
          git commit -am "deps: tidy all modules"
          git push