mirror of
https://github.com/danog/dart-sass.git
synced 2024-12-03 18:17:45 +01:00
91 lines
2.7 KiB
Dart
91 lines
2.7 KiB
Dart
// Copyright 2016 Google Inc. Use of this source code is governed by an
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// MIT-style license that can be found in the LICENSE file or at
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// https://opensource.org/licenses/MIT.
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import 'dart:async';
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import 'dart:isolate';
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import 'package:args/args.dart';
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import 'package:stack_trace/stack_trace.dart';
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import 'package:path/path.dart' as p;
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import '../sass.dart';
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import 'exception.dart';
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import 'io.dart';
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void main(List<String> args) {
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var argParser = new ArgParser(allowTrailingOptions: true)
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..addOption('precision', hide: true)
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..addOption('style',
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abbr: 's',
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help: 'Output style.',
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allowed: ['expanded'],
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defaultsTo: 'expanded')
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..addFlag('color',
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abbr: 'c', help: 'Whether to emit terminal colors.', defaultsTo: true)
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..addFlag('trace', help: 'Print full Dart stack traces for exceptions.')
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..addFlag('help',
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abbr: 'h', help: 'Print this usage information.', negatable: false)
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..addFlag('version',
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help: 'Print the version of Dart Sass.', negatable: false);
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var options = argParser.parse(args);
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if (options['version'] as bool) {
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_loadVersion().then((version) {
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print(version);
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exit(0);
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});
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return;
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}
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if (options['help'] as bool || options.rest.isEmpty) {
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print("Compile Sass to CSS.\n");
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print("Usage: sass <input>\n");
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print(argParser.usage);
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exit(64);
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}
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var color = options['color'] as bool;
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try {
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var css = render(options.rest.first, color: color);
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if (css.isNotEmpty) print(css);
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} on SassException catch (error, stackTrace) {
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stderr.writeln(error.toString(color: color));
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if (options['trace'] as bool) {
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stderr.writeln();
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stderr.write(new Trace.from(stackTrace).terse.toString());
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stderr.flush();
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}
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// Exit code 65 indicates invalid data per
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// http://www.freebsd.org/cgi/man.cgi?query=sysexits.
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exit(65);
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} catch (error, stackTrace) {
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if (color) stderr.write('\u001b[31m\u001b[1m');
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stderr.write('Unexpected exception:');
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if (color) stderr.write('\u001b[0m');
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stderr.writeln();
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stderr.writeln(error);
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stderr.writeln();
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stderr.write(new Trace.from(stackTrace).terse.toString());
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stderr.flush();
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}
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}
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/// Loads and returns the current version of Sass.
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Future<String> _loadVersion() async {
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var version = const String.fromEnvironment('version');
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if (version != null) return version;
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var libDir =
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p.fromUri(await Isolate.resolvePackageUri(Uri.parse('package:sass/')));
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var pubspec = readFile(p.join(libDir, '..', 'pubspec.yaml'));
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return pubspec
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.split("\n")
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.firstWhere((line) => line.startsWith('version: '))
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.split(" ")
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.last;
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}
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