sync-labels.yml

name: Sync Labels

on:
  push:
    branches:
      - main
    paths:
      - ".github/labels.json"
      - ".github/workflows/sync-labels.yml"
  workflow_dispatch:

permissions:
  contents: read
  issues: write

jobs:
  sync:
    name: Sync Repository Labels
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Sync labels from config
        uses: actions/github-script@v7
        with:
          script: |
            const fs = require("fs");
            const labels = JSON.parse(fs.readFileSync(".github/labels.json", "utf8"));
            const { owner, repo } = context.repo;
            const existing = await github.paginate(github.rest.issues.listLabelsForRepo, {
              owner,
              repo,
              per_page: 100,
            });
            const existingMap = new Map(existing.map((label) => [label.name, label]));

            for (const label of labels) {
              if (existingMap.has(label.name)) {
                await github.rest.issues.updateLabel({
                  owner,
                  repo,
                  name: label.name,
                  new_name: label.name,
                  color: label.color,
                  description: label.description,
                });
                core.info(`Updated label: ${label.name}`);
                continue;
              }

              await github.rest.issues.createLabel({
                owner,
                repo,
                name: label.name,
                color: label.color,
                description: label.description,
              });
              core.info(`Created label: ${label.name}`);
            }