Move mojo and mojom from mojo/public/dart to mojo/dart/packages

mojo/public/dart/mojom/lib/src/utils.dart

-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-library mojom.utils;
-
-import 'dart:async';
-import 'dart:convert';
-import 'dart:io';
-
-import 'package:crypto/crypto.dart' as crypto;
-import 'package:logging/logging.dart' as logging;
-import 'package:path/path.dart' as path;
-
-bool isMojomDart(String path) => path.endsWith('.mojom.dart');
-bool isMojom(String path) => path.endsWith('.mojom');
-bool isDotMojoms(String path) => path.endsWith(".mojoms");
-
-String makeAbsolute(String p) =>
-    path.isAbsolute(p) ? path.normalize(p) : path.normalize(path.absolute(p));
-
-String makeRelative(String p) => path.isAbsolute(p)
-    ? path.normalize(path.relative(p, from: Directory.current.path))
-    : path.normalize(p);
-
-logging.Logger log;
-
-/// An Error for problems on the command line.
-class CommandLineError {
-  final _msg;
-  CommandLineError(this._msg);
-  toString() => "Command Line Error: $_msg";
-}
-
-/// An Error for failures of the bindings generation script.
-class GenerationError {
-  final _msg;
-  GenerationError(this._msg);
-  toString() => "Generation Error: $_msg";
-}
-
-/// An Error for failing to fetch a .mojom file.
-class FetchError {
-  final _msg;
-  FetchError(this._msg);
-  toString() => "Fetch Error: $_msg";
-}
-
-Future<String> _downloadUrl(HttpClient httpClient, Uri uri) async {
-  try {
-    var request = await httpClient.getUrl(uri);
-    var response = await request.close();
-    if (response.statusCode >= 400) {
-      var msg = "Failed to download $uri\nCode ${response.statusCode}";
-      if (response.reasonPhrase != null) {
-        msg = "$msg: ${response.reasonPhrase}";
-      }
-      throw new FetchError(msg);
-    }
-    var fileString = new StringBuffer();
-    await for (String contents in response.transform(UTF8.decoder)) {
-      fileString.write(contents);
-    }
-    return fileString.toString();
-  } catch (e) {
-    throw new FetchError("$e");
-  }
-}
-
-/// Fetch file at [uri] using [httpClient] if needed. Throw a [FetchError] if
-/// the file is not successfully fetched.
-Future<String> fetchUri(HttpClient httpClient, Uri uri) async {
-  if (uri.scheme.startsWith('http')) {
-    return _downloadUrl(httpClient, uri);
-  }
-  try {
-    File f = new File.fromUri(uri);
-    return await f.readAsString();
-  } catch (e) {
-    throw new FetchError("$e");
-  }
-}
-
-markFileReadOnly(String file) async {
-  if (!Platform.isLinux && !Platform.isMacOS) {
-    String os = Platform.operatingSystem;
-    throw 'Setting file $file read-only is not supported on $os.';
-  }
-  var process = await Process.run('chmod', ['a-w', file]);
-  if (process.exitCode != 0) {
-    print('Setting file $file read-only failed: ${process.stderr}');
-  }
-}
-
-Future<DateTime> getModificationTime(File f) async {
-  var stat = await f.stat();
-  return stat.modified;
-}
-
-Future<List<int>> fileSHA1(File f) async {
-  var sha1 = new crypto.SHA1();
-  await for (var bytes in f.openRead()) {
-    sha1.add(bytes);
-  }
-  return sha1.close();
-}
-
-Future<bool> equalSHA1(File file1, File file2) async {
-  List<int> file1sha1 = await fileSHA1(file1);
-  List<int> file2sha1 = await fileSHA1(file2);
-  if (file1sha1.length != file2sha1.length) return false;
-  for (int i = 0; i < file1sha1.length; i++) {
-    if (file1sha1[i] != file2sha1[i]) return false;
-  }
-  return true;
-}
-
-/// If the files are the same, returns 0.
-/// Otherwise, returns a negative number if f1 less recently modified than f2,
-/// or a positive number if f1 is more recently modified than f2.
-Future<int> compareFiles(File f1, File f2) async {
-  FileStat f1stat = await f1.stat();
-  FileStat f2stat = await f2.stat();
-  if ((f1stat.size != f2stat.size) || !await equalSHA1(f1, f2)) {
-    return (f1stat.modified.isBefore(f2stat.modified)) ? -1 : 1;
-  }
-  return 0;
-}
-
-/// Is any element of [haystack] a prefix of [needle]?
-bool containsPrefix(String needle, List<String> haystack) {
-  if (haystack == null) return false;
-  var match =
-      haystack.firstWhere((p) => needle.startsWith(p), orElse: () => null);
-  return match != null;
-}