Function flattenFileTree

server/utils/import-resolver.ts:10–25

(tree: PackageFileTree[])

 * Flatten a nested file tree into a set of file paths for quick lookups.
 */
export function flattenFileTree(tree: PackageFileTree[]): FileSet {
  const files = new Set<string>()

  function traverse(nodes: PackageFileTree[]) {
    for (const node of nodes) {
      if (node.type === 'file') {
        files.add(node.path)
      } else if (node.children) {
        traverse(node.children)
      }
    }
  }

  traverse(tree)
  return files
}

/**
 * Normalize a path by resolving . and .. segments