Remove many things that depend on frog.

utils/import_mapper/import_mapper.dart

Index: utils/import_mapper/import_mapper.dart
===================================================================
--- utils/import_mapper/import_mapper.dart	(revision 6866)
+++ utils/import_mapper/import_mapper.dart	(working copy)
@@ -1,128 +0,0 @@
-// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-#library('import_mapper');
-
-#import('dart:io');
-// TODO(rnystrom): This should be dart:json.
-#import('../../lib/json/json.dart');
-#import('../../frog/lang.dart');
-#import('../../frog/file_system.dart');
-#import('../../frog/file_system_vm.dart');
-
-typedef String ImportHook(ImportContext context, String name);
-
-/**
- * Provides contextual information about the current import and environment
- * that the import hook can use to resolve an import.
- */
-class ImportContext {
-  // TODO(rnystrom): Fill in context here as we figure out what we want.
-}
-
-/** The generated import map. */
-Map<String, String> _importMap;
-
-ImportHook _hook;
-
-/**
- * Uses the given import hook to generate an import map for all of the
- * libraries used by a [entrypoint]. Returns the generated map object.
- */
-Map<String, String> generateImportMap(String entrypoint, ImportHook hook) {
-  _importMap = <String>{};
-  _hook = hook;
-
-  // Initialize frog.
-  final files = new VMFileSystem();
-  parseOptions('../../frog', ['', '', '--libdir=../../frog/lib'], files);
-  initializeWorld(files);
-  _importMap = {};
-
-  _walkLibrary(entrypoint);
-
-  return _importMap;
-}
-
-/**
- * Uses the given import hook to generate an import map for all of the
- * libraries used by a given entrypoint. The entrypoint is assumed to be
- * provided as the first VM command line argument.
- *
- * Prints the import map data (a JSON object) to stdout.
- */
-void printImportMap(ImportHook hook) {
-  // The entrypoint of the library to generate an import map for.
-  final argv = (new Options()).arguments;
-  final entrypoint = argv[argv.length - 1];
-
-  final map = generateImportMap(entrypoint, hook);
-  print(JSON.stringify(map));
-}
-
-/**
- * Recursively traverses all of the `#import()` directives in the given library
- * entrypoint and runs the import hook on them. [entrypoint] should be a path
- * to a library file.
- */
-void _walkLibrary(String entrypoint) {
-  // TODO(rnystrom): Do more here when there's context we care about.
-  final context = new ImportContext();
-
-  final text = _readFile(entrypoint);
-  final source = new SourceFile(entrypoint, text);
-  final parser = new Parser(source, diet: true);
-
-  final definitions = parser.compilationUnit();
-
-  for (final definition in definitions) {
-    // Only look at #import directives.
-    if (definition is! DirectiveDefinition) continue;
-    DirectiveDefinition directive = definition;
-    if (directive.name.name != 'import') continue;
-
-    // The first argument is expected to be a string literal.
-    final name = directive.arguments[0].value.value.actualValue;
-
-    // Only map a given import once.
-    // TODO(rnystrom): Should invoke the hook again and ensure that it gets
-    // the same result. It should be an error if the hook isn't
-    // referentially transparent.
-    if (!_importMap.containsKey(name)) {
-      final uri = _hook(context, name);
-      _importMap[name] = uri;
-
-      // Recurse into this library.
-      // TODO(rnystrom): Hackish. How should we handle corelib stuff?
-      if (!uri.startsWith('dart:')) {
-        _walkLibrary(_getFullPath(entrypoint, uri));
-      }
-    }
-  }
-}
-
-// TODO(rnystrom): Copied from frog/library.dart (makeFullPath).
-/**
- * Given the path to a library containing an #import() and the resolved URI for
- * that import, gives the full path to that library.
- */
-String _getFullPath(String importingLibrary, String filename) {
-  if (filename.startsWith('dart:')) return filename;
-  // TODO(jmesserly): replace with node.js path.resolve
-  if (filename.startsWith('/')) return filename;
-  if (filename.startsWith('file:///')) return filename;
-  if (filename.startsWith('http://')) return filename;
-  if (const RegExp('^[a-zA-Z]:/').hasMatch(filename)) return filename;
-  return joinPaths(dirname(importingLibrary), filename);
-}
-
-String _readFile(String filename) {
-  // TODO(rnystrom): There must be an easier way than this.
-  var file = (new File(filename)).openSync();
-  var length = file.lengthSync();
-  var buffer = new List<int>(length);
-  var bytes = file.readListSync(buffer, 0, length);
-  file.closeSync();
-  return new String.fromCharCodes(buffer);
-}