ci_submodule.yml

name: CI for libsc check
on:
  pull_request:

jobs:

  linux-sub:
    if: github.event.pull_request.draft == false
    runs-on: ubuntu-latest
    env:
      TOKEN: ${{ secrets.GITHUB_TOKEN }}
      PR_NODE_ID: ${{ github.event.pull_request.node_id }}
      INPUT_PATH: sc
    steps:
    - name: Checkout source code
      uses: actions/checkout@v4
      with:
        submodules: true
        
    - name: Determine hashes to compare
      shell: bash
      run: |
        EVENT_PATH="${GITHUB_EVENT_PATH}"
        cd "${GITHUB_WORKSPACE}" \
        || error "__Line:${LINENO}__Error: Cannot change directory to Github Workspace"
        echo "PR=`jq -r ".number" "${EVENT_PATH}"`" >> $GITHUB_ENV
        PR_BRANCH=`jq -r ".pull_request.head.ref" "${EVENT_PATH}"`
        BASE_BRANCH=`jq -r ".pull_request.base.ref" "${EVENT_PATH}"`
        echo "Run for PR of ${PR_BRANCH} into ${BASE_BRANCH}"
        echo "Fetch Branch Histories"
        git fetch origin "${PR_BRANCH}" --recurse-submodules=no \
        || error "__Line:${LINENO}__Error: Could not fetch history of ${PR_BRANCH}"
        git fetch origin "${BASE_BRANCH}" --recurse-submodules=no \
        || error "__Line:${LINENO}__Error: Could not fetch history of ${BASE_BRANCH}"
        echo "TO_HASH=`git rev-parse origin/${PR_BRANCH}`" >> $GITHUB_ENV
        echo "FROM_HASH=`git rev-parse origin/${BASE_BRANCH}`" >> $GITHUB_ENV

    - name: Convert PR to draft if necessary
      shell: bash
      run: |
        CHANGED=`git diff --name-only ${{ env.FROM_HASH }}...${{ env.TO_HASH }}`
        if grep "^${INPUT_PATH}$" <<< "${CHANGED}"; then
          echo "${TOKEN}" | gh auth login --with-token
          gh pr comment ${PR} --body \
          "Submodule has been changed by this PR. \
          This is forbidden by the repository policy. \
          Your PR is turned into a draft PR."
          gh api graphql -F id="${PR_NODE_ID}"  -f query='
            mutation($id: ID!) {
              convertPullRequestToDraft(input: { pullRequestId: $id }) {
                pullRequest {
                  id
                  number
                  isDraft
                }
              }
            }
          '
          echo "PR was converted to draft successfully."
          exit 1
        fi
        echo "Success: submodule has not been changed."
        exit 0