create-labels.yml

name: Create Labels

on:
  workflow_dispatch:

permissions:
  issues: write

jobs:
  create-labels:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Create or update labels
        uses: actions/github-script@v7
        with:
          script: |
            const fs = require("fs");

            const content = fs.readFileSync(".github/labels.yml", "utf8");
            const labels = [];
            let current = null;

            for (const rawLine of content.split(/\r?\n/)) {
              const line = rawLine.trim();

              if (!line) {
                continue;
              }

              if (line.startsWith("- name:")) {
                if (current) {
                  labels.push(current);
                }

                current = {
                  name: line.replace("- name:", "").trim().replace(/^"|"$/g, "")
                };
                continue;
              }

              if (!current) {
                continue;
              }

              const separatorIndex = line.indexOf(":");

              if (separatorIndex === -1) {
                continue;
              }

              const key = line.slice(0, separatorIndex).trim();
              const value = line.slice(separatorIndex + 1).trim().replace(/^"|"$/g, "");
              current[key] = value;
            }

            if (current) {
              labels.push(current);
            }

            for (const label of labels) {
              const color = label.color.replace(/^#/, "");

              try {
                await github.rest.issues.createLabel({
                  owner: context.repo.owner,
                  repo: context.repo.repo,
                  name: label.name,
                  color,
                  description: label.description || ""
                });
              } catch (error) {
                if (error.status !== 422) {
                  throw error;
                }

                await github.rest.issues.updateLabel({
                  owner: context.repo.owner,
                  repo: context.repo.repo,
                  name: label.name,
                  color,
                  description: label.description || ""
                });
              }
            }