Pull args, intl, logging, shelf, and source_maps out of the SDK.

pkg/csslib/lib/css.dart

-// Copyright (c) 2013, 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 css;
-
-import 'dart:io';
-
-import 'package:path/path.dart' as path;
-import 'package:source_span/source_span.dart';
-
-import 'parser.dart';
-import 'visitor.dart';
-import 'src/messages.dart';
-import 'src/options.dart';
-
-void main(List<String> arguments) {
-  // TODO(jmesserly): fix this to return a proper exit code
-  var options = PreprocessorOptions.parse(arguments);
-  if (options == null) return;
-
-  messages = new Messages(options: options);
-
-  _time('Total time spent on ${options.inputFile}', () {
-    _compile(options.inputFile, options.verbose);
-  }, true);
-}
-
-void _compile(String inputPath, bool verbose) {
-  var ext = path.extension(inputPath);
-  if (ext != '.css' && ext != '.scss') {
-    messages.error("Please provide a CSS/Sass file", null);
-    return;
-  }
-  try {
-    // Read the file.
-    var filename = path.basename(inputPath);
-    var contents = new File(inputPath).readAsStringSync();
-    var file = new SourceFile(contents, url: path.toUri(inputPath));
-
-    // Parse the CSS.
-    var tree = _time('Parse $filename',
-        () => new Parser(file, contents).parse(), verbose);
-
-    _time('Analyzer $filename',
-        () => new Analyzer([tree], messages), verbose).run();
-
-    // Emit the processed CSS.
-    var emitter = new CssPrinter();
-    _time('Codegen $filename',
-        () => emitter.visitTree(tree, pretty: true), verbose);
-
-    // Write the contents to a file.
-    var outPath = path.join(path.dirname(inputPath), '_$filename');
-    new File(outPath).writeAsStringSync(emitter.toString());
-  } catch (e) {
-    messages.error('error processing $inputPath. Original message:\n $e', null);
-  }
-}
-
-_time(String message, callback(), bool printTime) {
-  if (!printTime) return callback();
-  final watch = new Stopwatch();
-  watch.start();
-  var result = callback();
-  watch.stop();
-  final duration = watch.elapsedMilliseconds;
-  _printMessage(message, duration);
-  return result;
-}
-
-void _printMessage(String message, int duration) {
-  var buf = new StringBuffer();
-  buf.write(message);
-  for (int i = message.length; i < 60; i++) buf.write(' ');
-  buf.write(' -- ');
-  if (duration < 10) buf.write(' ');
-  if (duration < 100) buf.write(' ');
-  buf..write(duration)..write(' ms');
-  print(buf.toString());
-}