| // 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()); |
| } |