Function resolve

src/node.ts:138–146

(specifier: string | AstNode)

function importResolve(input: string, cacheRoot: string, packageRoot: string): Plugin {
  async function resolve(specifier: string | AstNode): Promise<ResolveIdResult> {
    return typeof specifier !== "string" || // AST node?
      isNodeBuiltin(specifier) || // node built-in, e.g., "node:fs" or "fs"
      isPathImport(specifier) || // relative path, e.g., ./foo.js
      /^\0?[\w-]+:/.test(specifier) || // windows file path, https: URL, \x00node-resolve:, etc.
      specifier === input // entry point
      ? null // don’t do any additional resolution
      : {id: await resolveNodeImportInternal(cacheRoot, packageRoot, specifier), external: true}; // resolve bare import
  }
  return {
    name: "resolve-import",
    resolveId: resolve,