coverage.yaml

# Copyright 2022 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# 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: code coverage
on: [pull_request]

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Setup Go
        uses: actions/setup-go@v3
        with:
          go-version: "1.23"

      - name: Checkout base branch
        uses: actions/checkout@v3
        with:
          ref: ${{ github.base_ref }}
      - name: Calculate base code coverage
        run: |
          go test -short -coverprofile current_cover.out ./... || true
          export CUR_COVER=$(go tool cover -func current_cover.out | grep total | awk '{print substr($3, 1, length($3)-1)}')
          echo "CUR_COVER=$CUR_COVER" >> $GITHUB_ENV

      - name: Checkout PR branch
        uses: actions/checkout@v3
      - name: Calculate PR code coverage
        run: |
          go test -short -coverprofile pr_cover.out ./... || true
          export PR_COVER=$(go tool cover -func pr_cover.out | grep total | awk '{print substr($3, 1, length($3)-1)}')
          echo "PR_COVER=$PR_COVER" >> $GITHUB_ENV

      - name: Verify code coverage. If your reading this and the step has failed, please add tests to cover your changes.
        run: |
          go tool cover -func pr_cover.out
          if [ "${{ env.PR_COVER }}" -lt "${{ env.CUR_COVER }}"  ]; then
            exit 1;
          fi