.github/workflows/issue_bot.yml

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name: Issue Bot

on:
  issues:
    types:
      - opened

permissions:
  contents: read
  issues: write

jobs:
  label_components:
    name: Label Components
    if: github.event.issue.pull_request == null
    runs-on: ubuntu-latest
    steps:
      - uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8.0.0
        with:
          script: |
            let split_body = context.payload.issue.body.split('### Component(s)');
            if (split_body.length != 2) throw new Error('No components found!');

            let current_labels = await github.rest.issues.listLabelsOnIssue({
              "owner": context.repo.owner,
              "repo": context.repo.repo,
              "per_page": 100,
              "issue_number": context.payload.issue.number,
            });

            let current_label_names = current_labels.data.map(label => label.name);

            // keep non-component labels
            let non_component_labels = current_label_names.filter(
              label => !label.startsWith("Component: ")
            );

            let component_labels = split_body[1]
              .split(',')
              .map(component => component.trim())
              .map(component => "Component: " + component);

            let repo_labels = await github.rest.issues.listLabelsForRepo({
              "owner": context.repo.owner,
              "repo": context.repo.repo,
              "per_page": 100,
            });

            // this removes nonexistent labels
            component_labels = component_labels.filter(
              label => repo_labels.data.some(repo_label => repo_label.name === label)
            );
          
            if (component_labels.length == 0) throw new Error('No components found!');

            await github.rest.issues.setLabels({
              "owner": context.repo.owner,
              "repo": context.repo.repo,
              "issue_number": context.payload.issue.number,
              "labels": component_labels.concat(non_component_labels),
            });