coverage-comment.yml

name: Coverage Report Comment

on:
  workflow_run:
    workflows:
      - test
    types:
      - completed
  workflow_dispatch:

jobs:
  comment:
    runs-on: ubuntu-latest
    if: github.event.workflow_run.event == 'pull_request' && github.event.workflow_run.conclusion == 'success'
    steps:
      - name: Download coverage report
        uses: actions/github-script@v5.0.0
        with:
          script: |
            const artifacts = await github.rest.actions.listWorkflowRunArtifacts({
               owner: context.repo.owner,
               repo: context.repo.repo,
               run_id: ${{ github.event.workflow_run.id }},
            })
            const matchArtifact = artifacts.data.artifacts.filter((artifact) => {
              return artifact.name == 'report'
            })[0]
            const download = await github.rest.actions.downloadArtifact({
               owner: context.repo.owner,
               repo: context.repo.repo,
               artifact_id: matchArtifact.id,
               archive_format: 'zip',
            })
            const fs = require('fs')
            fs.writeFileSync('${{github.workspace}}/report.zip', Buffer.from(download.data))

      - name: Unzip report
        run: unzip report.zip

      - name: Comment coverage result to Pull Requests
        uses: actions/github-script@v5.0.0
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const fs = require('fs')
            const baseReport = fs.readFileSync('report.txt', 'utf8').toString().split('\n')
            let report = ''
            for (let i = 0; i < baseReport.length; i++) {
              const line = baseReport[i].split(' ').filter(v => v)
              if (i === 1 && line.length === 1) {
                report += "|:---|---:|---:|---:|\n"
              } else if (line.length === 1) {
                continue
              } else {
                if (i !== 0 && line.length === 4) {
                  const parcent = Number(line[3].replace("%", ""))
                  let color = 'green'
                  if (parcent < 50) {
                    color = 'red'
                  } else if (parcent < 90) {
                    color = 'orange'
                  }
                  line[3] = `![coverage-${parcent}%](https://img.shields.io/badge/coverage-${parcent}%25-${color}.svg)`
                }
                report += "|" + line.join("|") + "|\n"
              }
              if (line[0] === 'TOTAL') break
            }

            const issue_number = Number(fs.readFileSync('pr_num.txt'))
            const body = `## Coverage Result\n\n<details>\n<summary>Resultを開く</summary>\n\n${report}\n</details>`

            let listComments = await github.rest.issues.listComments({
              issue_number,
              owner: context.repo.owner,
              repo: context.repo.repo,
            })
            listComments = listComments.data.filter((comment) => {
              return comment.body.includes('Coverage Result') && comment.user.login.includes('github-actions')
            })

            if (listComments.length === 0) {
              github.rest.issues.createComment({
                issue_number,
                owner: context.repo.owner,
                repo: context.repo.repo,
                body,
              })
            } else {
              github.rest.issues.updateComment({
                comment_id: listComments[0].id,
                owner: context.repo.owner,
                repo: context.repo.repo,
                body,
              })
            }