polen/src/lib/helpers.ts

A framework for delightful GraphQL developer portals

import { Err, Manifest } from '@wollybeard/kit'

/**
 * Check if a project has a package installed by examining its package.json
 */
export async function checkIsProjectHasPackageInstalled(
  projectRoot: string,
  packageName: string,
): Promise<boolean> {
  const packageJson = await Manifest.resource.read(projectRoot)

  if (Err.is(packageJson)) {
    if (packageJson._tag === `ResourceErrorNotFound`) return false
    throw packageJson
  }

  // Check if React is in dependencies or devDependencies
  return !!(packageJson.dependencies?.[packageName]
    ?? packageJson.devDependencies?.[packageName])
}