Function getNodeModulesBinDirectory

packages/cli-exec/src/lookup.ts:543–567

* Detects whether `filePath` is located inside a `node_modules/.bin` directory.

(
  filePath: string
)

 * Detects whether `filePath` is located inside a `node_modules/.bin` directory.
 */
async function getNodeModulesBinDirectory(
  filePath: string
): Promise<string | null> {
  const candidateDirectory = path.resolve(path.dirname(filePath));
  const directories = [candidateDirectory];

  try {
    const canonicalDirectory = await realpath(candidateDirectory);

    if (!directories.includes(canonicalDirectory)) {
      directories.push(canonicalDirectory);
    }
  } catch {}

  for (const directory of directories) {
    if (
      path.basename(directory) === '.bin' &&
      path.basename(path.dirname(directory)) === 'node_modules'
    ) {
      return directory;
    }
  }

  return null;
}

/**
 * Classifies a concrete PATH hit after command lookup. This catches local