rnystrom@google.com
139b211f7d
It doesn't do anything more than show usage and version, but the test infrastructure is there. Review URL: https://chromiumcodereview.appspot.com//9950005 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@6066 260f80e4-7a28-3924-810f-c04153c831b5
86 lines
2.1 KiB
Dart
86 lines
2.1 KiB
Dart
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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/**
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* The main entrypoint for the pub command line application.
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*/
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#library('pub');
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#import('utils.dart');
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List<String, PubCommand> commands;
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main() {
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final args = new Options().arguments;
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// TODO(rnystrom): In addition to explicit "help" and "version" commands,
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// should also add special-case support for --help and --version arguments to
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// be consistent with other Unix apps.
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commands = {
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'version': new PubCommand('print Pub version', showVersion)
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};
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if (args.length == 0) {
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showUsage();
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return;
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}
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// Select the command.
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final command = commands[args[0]];
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if (command == null) {
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print('Unknown command "${args[0]}".');
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print('Run "pub help" to see available commands.');
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exit(64); // see http://www.freebsd.org/cgi/man.cgi?query=sysexits.
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return;
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}
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args.removeRange(0, 1);
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command.function(args);
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}
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/** Displays usage information for the app. */
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void showUsage() {
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print('Pub is a package manager for Dart.');
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print('');
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print('Usage:');
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print('');
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print(' pub command [arguments]');
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print('');
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print('The commands are:');
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print('');
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// Show the commands sorted.
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// TODO(rnystrom): A sorted map would be nice.
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int length = 0;
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final names = <String>[];
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for (final command in commands.getKeys()) {
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length = Math.max(length, command.length);
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names.add(command);
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}
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names.sort((a, b) => a.compareTo(b));
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for (final name in names) {
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print(' ${padRight(name, length)} ${commands[name].description}');
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}
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print('');
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print('Use "pub help [command]" for more information about a command.');
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}
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/** Displays pub version information. */
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void showVersion(List<String> args) {
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// TODO(rnystrom): Store some place central.
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print('Pub 0.0.0');
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}
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typedef void CommandFunction(List<String> args);
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class PubCommand {
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final String description;
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final CommandFunction function;
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PubCommand(this.description, this.function);
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}
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