report-coverage.yml

name: Report Elixir Coverage

on:
  workflow_run:
    workflows:
      - CI
    types:
      - completed

permissions:
  actions: read
  contents: read
  pull-requests: write

jobs:
  report-coverage:
    if: ${{ github.event.workflow_run.event == 'pull_request' && github.event.workflow_run.conclusion == 'success' }}
    runs-on: ubuntu-latest

    steps:
      - run: mkdir -p ${{ runner.temp }}/cover
      - run: echo Fetching artifacts for ${{ github.event.workflow_run.id }}, event name ${{ github.event_name }}, triggered by ${{ github.event.workflow_run.event }}
      - name: Download artifact
        uses: actions/github-script@v3.1.0
        with:
          script: |
            var artifacts = await github.actions.listWorkflowRunArtifacts({
              owner: context.repo.owner,
              repo: context.repo.repo,
              run_id: ${{github.event.workflow_run.id }},
            });
            var matchArtifact = artifacts.data.artifacts.filter((artifact) => {
              return artifact.name == "elixir-lcov"
            })[0];
            var download = await github.actions.downloadArtifact({
              owner: context.repo.owner,
              repo: context.repo.repo,
              artifact_id: matchArtifact.id,
              archive_format: 'zip',
            });
            var fs = require('fs');
            fs.writeFileSync('${{ runner.temp }}/cover/elixir-lcov.zip', Buffer.from(download.data));
      - working-directory: ${{ runner.temp }}/cover
        run: |
          unzip elixir-lcov.zip
          echo "PR_SHA=$(cat PR_SHA)" >> $GITHUB_ENV
          echo "PR_NUMBER=$(cat PR_NUMBER)" >> $GITHUB_ENV
      - uses: actions/checkout@v2 # UNTRUSTED CODE - do not run scripts from it
        with:
          ref: ${{ env.PR_SHA }}
      - name: Upload coverage artifact and post comment
        uses: mbta/github-actions-report-lcov@v1
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          coverage-files: ${{ runner.temp }}/cover/lcov*.info
          artifact-name: elixir-code-coverage