coverage.yml

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name: Coverage report

on:
  pull_request_target:
    paths:
      - 'pkg/**'

jobs:
  report:
    runs-on: ubuntu-latest

    permissions:
      pull-requests: write
      issues: write

    steps:

      - name: Setup go
        uses: actions/setup-go@v4
        with:
          go-version: '1.20'
          check-latest: true

      - name: Prepare repo configuration
        shell: bash
        env:
          CI_USER: "github-actions[bot]"
          CI_EMAIL: "41898282+github-actions[bot]@users.noreply.github.com"
        run: |
          git clone ${{ github.event.pull_request.head.repo.clone_url }}
          cd ${{ github.event.pull_request.head.repo.name }}
          git checkout ${{ github.event.pull_request.head.ref }}

          git config --local user.email "$CI_EMAIL"
          git config --local user.name "$CI_USER"
          git remote add upstream ${{ github.event.pull_request.base.repo.clone_url }}
          git fetch upstream

      - name: Rebase
        shell: bash
        working-directory: ./${{ github.event.pull_request.head.repo.name }}
        env:
          CI_USER: "github-actions[bot]"
          CI_EMAIL: "41898282+github-actions[bot]@users.noreply.github.com"
          CI_TOKEN: ${{ inputs.secretGithubToken }}
        run: |
          git pull --rebase upstream ${{ github.event.pull_request.base.ref }} && echo "rebaseAborted=0" >> $GITHUB_ENV || echo "rebaseAborted=1" >> $GITHUB_ENV

      - name: Get New Coverage
        shell: bash
        working-directory: ./${{ github.event.pull_request.head.repo.name }}
        if: env.rebaseAborted != 1
        run: |
          make build-resources
          go test ./... -covermode=count -coverprofile=coverage.out
          go tool cover -func=coverage.out -o=coverage.out

          new_coverage="$(grep -o -P '(?<=\(statements\))(.+)(?=%)' coverage.out | xargs)"
          echo "NEW_COV=$new_coverage" >> $GITHUB_ENV

      - name: Get Old Coverage
        shell: bash
        working-directory: ./${{ github.event.pull_request.head.repo.name }}
        if: env.rebaseAborted != 1
        run: |
          git checkout upstream/${{ github.event.pull_request.base.ref }}
          make build-resources
          go test ./... -covermode=count -coverprofile=coverage_old.out
          go tool cover -func=coverage_old.out -o=coverage_old.out

          old_coverage="$(grep -o -P '(?<=\(statements\))(.+)(?=%)' coverage_old.out | xargs)"
          echo "OLD_COV=$old_coverage" >> $GITHUB_ENV

      - name: Process results
        shell: bash
        working-directory: ./${{ github.event.pull_request.head.repo.name }}
        if: env.rebaseAborted != 1
        run: |
          echo "OLD - $OLD_COV"
          echo "NEW - $NEW_COV"
          coverage_difference=$(bc <<< $NEW_COV-$OLD_COV)
          if (( $(echo "$coverage_difference > 0" |bc -l) )); then
            echo "POS_DIFF=POS" >> $GITHUB_ENV
          elif (( $(echo "$coverage_difference < 0" |bc -l) )); then
            echo "POS_DIFF=NEG" >> $GITHUB_ENV
          else
            echo "POS_DIFF=ZERO" >> $GITHUB_ENV
          fi
          echo "COV_DIFF=$coverage_difference" >> $GITHUB_ENV

      - name: Comment Coverage
        if: env.rebaseAborted != 1
        uses: actions/github-script@v6
        with:
          github-token: ${{secrets.GITHUB_TOKEN}}
          script: |

            if(${{env.POS_DIFF  == 'POS'}}){
              github.rest.issues.createComment({
                issue_number: context.issue.number,
                owner: context.repo.owner,
                repo: context.repo.repo,
                body: ':camel: **Thank you for contributing!**\n\nCode Coverage Report :heavy_check_mark: - Coverage changed: ${{env.OLD_COV}}% --> ${{env.NEW_COV}}% (Coverage difference: **+${{env.COV_DIFF}}%**)'
              })
            }else if(${{env.POS_DIFF == 'NEG'}}){
              github.rest.issues.createComment({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: ':camel: **Thank you for contributing!**\n\nCode Coverage Report :warning: - Coverage changed: ${{env.OLD_COV}}% --> ${{env.NEW_COV}}% (Coverage difference: **${{env.COV_DIFF}}%**)'
              })
            }else{
              github.rest.issues.createComment({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: ':camel: **Thank you for contributing!**\n\nCode Coverage Report :heavy_check_mark: - Coverage unchanged.'
              })
            }

      - name: Comment Merge Conflicts
        if: env.rebaseAborted == 1
        uses: actions/github-script@v6
        with:
          github-token: ${{secrets.GITHUB_TOKEN}}
          script: |
            github.rest.issues.createComment({
                issue_number: context.issue.number,
                owner: context.repo.owner,
                repo: context.repo.repo,
                body: ':camel: **Thank you for contributing!** :camel: \n\n  Unable to create **Coverage Report** :warning:. \n Merge conflicts found.'
              })