nixpkgs/ci/github-script/run.js

#!/usr/bin/env node
import { execSync } from 'node:child_process'
import { mkdtempSync, rmSync } from 'node:fs'
import { tmpdir } from 'node:os'
import { join } from 'node:path'
import { program } from 'commander'
import { getOctokit } from '@actions/github'

async function run(action, owner, repo) {
  const token = execSync('gh auth token', { encoding: 'utf-8' }).trim()

  const tmp = mkdtempSync(join(tmpdir(), 'github-script-'))
  try {
    process.env.GITHUB_WORKSPACE = tmp
    process.chdir(tmp)

    await action({
      github: getOctokit(token),
      context: {
        payload: {},
        repo: {
          owner,
          repo,
        },
      },
      core: {
        getInput() {
          return token
        },
        error: console.error,
        info: console.log,
        notice: console.log,
        setFailed(msg) {
          console.error(msg)
          process.exitCode = 1
        },
      },
      dry: true,
    })
  } finally {
    rmSync(tmp, { recursive: true })
  }
}

program
  .command('labels')
  .description('Manage labels on pull requests.')
  .argument('<owner>', 'Owner of the GitHub repository to label (Example: NixOS)')
  .argument('<repo>', 'Name of the GitHub repository to label (Example: nixpkgs)')
  .action(async (owner, repo) => {
    const labels = (await import('./labels.cjs')).default
    run(labels, owner, repo)
  })

await program.parse()