check-rebase.yml

# Copyright 2022 The Magma Authors.
#
# This source code is licensed under the BSD-style license found in the
# LICENSE file in the root directory of this source tree.
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

name: "Check Rebase"

on:
  pull_request:
    branches:
      - master
      - 'v1.*'

jobs:
  checkRebase:
    runs-on: ubuntu-latest
    env:
      HEAD_FULL_NAME: "${{github.event.pull_request.head.repo.full_name}}"
      BASE_FULL_NAME: "${{github.event.pull_request.base.repo.full_name}}"
      HEAD_SHA: "${{ github.event.pull_request.head.sha }}"
      BASE_SHA: "${{ github.event.pull_request.base.sha }}"
    steps:
      - name: Checkout Head
        uses: actions/checkout@7884fcad6b5d53d10323aee724dc68d8b9096a2e # pin@v2
        with:
          repository: "${{env.HEAD_FULL_NAME}}"
          fetch-depth: 0
      - name: Checkout Base
        uses: actions/checkout@7884fcad6b5d53d10323aee724dc68d8b9096a2e # pin@v2
        with:
          repository: "${{env.BASE_FULL_NAME}}"
          fetch-depth: 0
      - name: Check Commits Hash
        run: |
          COMMON_SHA="$(git merge-base $BASE_SHA $HEAD_SHA)"
          if [ "${COMMON_SHA}" = "$BASE_SHA" ]; then
            echo "Merge Succeeded : It is rebased"
            exit 0
          else
            echo "Merge Failed : It is not rebased"
            exit 1
          fi