wr-add-issues-labels-to-pr.yml

# Name that appears on the workflow
# Note: This workflow runs once Add Linked Issue Labels to Pull Request is completed
name: WR Add Linked Issue Labels to Pull Request
on:
  workflow_run:
    workflows: ["Add Linked Issue Labels to Pull Request"]
    types: [completed]

jobs:
  Last-Workflow-Success:
    runs-on: ubuntu-latest
    if: ${{ github.event.workflow_run.conclusion == 'success' }}
    steps:
      - name: Download artifact
        uses: actions/github-script@v4
        with:
          script: |
            // Retrieve metadata about the artifacts of the last workflow
            // https://octokit.github.io/rest.js/v18#actions-list-workflow-run-artifacts
            const artifacts = await github.actions.listWorkflowRunArtifacts({
               owner: context.repo.owner,
               repo: context.repo.repo,
               run_id: context.payload.workflow_run.id,
            });
            const artifactData = artifacts.data.artifacts[0]
            
            // Download artifact with GET API
            // https://octokit.github.io/rest.js/v18#actions-download-artifact
            var download = await github.actions.downloadArtifact({
               owner: context.repo.owner,
               repo: context.repo.repo,
               artifact_id: artifactData.id,
               archive_format: 'zip',
            });
            const fs = require('fs');
            fs.writeFileSync('${{github.workspace}}/artifact.zip', Buffer.from(download.data));
      - run: unzip artifact.zip
          
    
      - name: Get Labels from Linked Issue
        uses: actions/github-script@v4
        # Variable that stores result of script
        id: labels-result
        with:
          script: |
            // Retrieve pull request and issue number from downloaded artifact
            const fs = require('fs')
            const artifact = fs.readFileSync('artifact.txt')
            const artifactJSON = JSON.parse(artifact)
            const issueNum = artifactJSON.issueNumber
            const prNumber = artifactJSON.prNumber
            
            // GET request to retrieve data from results of request
            // https://octokit.github.io/rest.js/v18#issues-list-labels-on-issue
            let data
            try {
              const results = await github.issues.listLabelsOnIssue({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: issueNum,
              });
              data = results.data
            }
            catch(err) {
              console.log('Error with GET Request to get labels')
              console.log(err)
              return false
            }
            // Gather all label names into an array of strings and return the array
            let labelNameArray = []
            for (const label of data) {
                labelNameArray.push(label.name)
            }
            console.log(`Labels found on Issue #${issueNum}: ${labelNameArray.join(', ')}`)
            return { prNumber: prNumber, labelNameArray: labelNameArray }
      
          
      - name: Put Labels to Pull Request
        uses: actions/github-script@v4
        # Variable that stores result of script
        id: final-result
        with:
          script: |
            let prNumber
            let labelNameArray
            
            // Retrieve pull request number and labels from previous step
            const labelsResult = ${{ steps.labels-result.outputs.result }}
            if (labelsResult) {
              prNumber = labelsResult.prNumber
              labelNameArray = labelsResult.labelNameArray
            } else {
              return false
            }
            
            // PUT request to apply labels to pull request
            // https://octokit.github.io/rest.js/v18#issues-add-labels
            let results;
            try {
              results = await github.issues.setLabels({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: prNumber,
                labels: labelNameArray,
              })
            }
            catch(err) {
              console.log('Error with PUT Request to edit labels')
              console.log(err)
              return false
            }
            
            // Log result of script
            console.log(results)
            if (results.status == 200) {
              return true
            } else {
              return false
            }
            
            
      # For use if there are follow-up actions following script success or failure.
      - name: Return Failure
        if: steps.final-result.outputs.result == 'false'
        run: |
          echo "Please expand above outputs for errors."
          exit 1
      - name: Return Success
        run: |
          echo "${{ steps.final-result.outputs.result }}"
          echo "Success"
          
  Last-Workflow-Failure:
    runs-on: ubuntu-latest
    if: ${{ github.event.workflow_run.conclusion == 'failure' }}
    steps:
      - name: Failed Run
        run: echo "The previous GitHub Action failed. Please check the logs for the previous action."