label-linked-issues.yml

# Label Linked Issues
#
# Add the `status:merged`, `status:prereleased`, or `status:released` label to a pull request's
# linked issues when a pull request is merged into `main` or on workflow dispatch.
#
# References:
#
# - https://docs.github.com/actions/learn-github-actions/contexts
# - https://docs.github.com/actions/learn-github-actions/expressions
# - https://docs.github.com/actions/using-workflows/events-that-trigger-workflows#pull_request
# - https://docs.github.com/actions/using-workflows/events-that-trigger-workflows#workflow_dispatch
# - https://docs.github.com/actions/using-workflows/workflow-commands-for-github-actions
# - https://docs.github.com/graphql/reference/objects#pullrequest
# - https://docs.github.com/webhooks-and-events/webhooks/webhook-events-and-payloads#pull_request
# - https://docs.github.com/webhooks-and-events/webhooks/webhook-events-and-payloads#workflow_dispatch
# - https://github.com/actions/github-script
# - https://github.com/hmarr/debug-action
# - https://github.com/octokit/graphql-action

---
name: label-linked-issues
on:
  pull_request:
    branches:
      - main
    types:
      - closed
  workflow_dispatch:
    inputs:
      pr:
        description: pull request number
        required: true
        type: number
permissions:
  issues: write
jobs:
  label-linked-issues:
    if: github.event_name == 'workflow_dispatch' || github.event.pull_request.merged
    runs-on: ubuntu-latest
    steps:
      - id: debug
        name: Print environment variables and event payload
        uses: hmarr/debug-action@v2.1.0
      - id: checkout
        name: Checkout main
        uses: actions/checkout@v4.1.0
        with:
          persist-credentials: false
          ref: main
      - id: version
        name: Get project version
        run: echo "result=$(jq .version package.json -r)" >>$GITHUB_OUTPUT
      - id: query
        name: Query linked issues
        uses: octokit/graphql-action@v2.2.25
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          query: |
            query ($limit: Int = 20, $owner: String!, $pr: Int!, $repo: String!) {
              repository(name: $repo, owner: $owner) {
                pullRequest(number: $pr) {
                  closingIssuesReferences(
                    first: $limit
                    orderBy: { direction: ASC, field: CREATED_AT }
                  ) {
                    edges {
                      node {
                        number
                      }
                    }
                  }
                }
              }
            }
          owner: ${{ github.repository_owner }}
          pr: ${{ inputs.pr || github.event.number }}
          repo: ${{ github.event.repository.name }}
      - id: label
        name: Label linked issues
        uses: actions/github-script@v6.4.1
        env:
          DATA: ${{ steps.query.outputs.data }}
          PRERELEASE: ${{ contains(steps.version.outputs.result, '-') }}
          RELEASE_BRANCH: ${{ contains(github.head_ref || github.ref_name, 'release/') }}
        with:
          script: |
            const { closingIssuesReferences } = JSON.parse(process.env.DATA).repository.pullRequest

            const issues = closingIssuesReferences.edges.map(edge => edge.node.number)

            const release = JSON.parse(process.env.RELEASE_BRANCH || 'false')
            const prerelease = JSON.parse(process.env.PRERELEASE || 'false')

            for (const issue_number of issues) {
              await github.rest.issues.addLabels({
                ...context.repo,
                issue_number,
                labels: [release ? `status:${prerelease ? 'pre' : ''}released` : 'status:merged']
              })
            }