| // Copyright 2014 The Bazel Authors. All rights reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| package com.google.devtools.build.lib.runtime.commands; |
| |
| import com.google.devtools.build.lib.analysis.BlazeVersionInfo; |
| import com.google.devtools.build.lib.analysis.NoBuildEvent; |
| import com.google.devtools.build.lib.events.Event; |
| import com.google.devtools.build.lib.runtime.BlazeCommand; |
| import com.google.devtools.build.lib.runtime.BlazeCommandResult; |
| import com.google.devtools.build.lib.runtime.Command; |
| import com.google.devtools.build.lib.runtime.CommandEnvironment; |
| import com.google.devtools.build.lib.util.ExitCode; |
| import com.google.devtools.common.options.OptionsParser; |
| import com.google.devtools.common.options.OptionsProvider; |
| |
| /** |
| * The 'blaze version' command, which informs users about the blaze version |
| * information. |
| */ |
| @Command(name = "version", |
| options = {}, |
| allowResidue = false, |
| mustRunInWorkspace = false, |
| help = "resource:version.txt", |
| shortDescription = "Prints version information for %{product}.") |
| public final class VersionCommand implements BlazeCommand { |
| @Override |
| public void editOptions(OptionsParser optionsParser) {} |
| |
| @Override |
| public BlazeCommandResult exec(CommandEnvironment env, OptionsProvider options) { |
| BlazeVersionInfo info = BlazeVersionInfo.instance(); |
| if (info.getSummary() == null) { |
| env.getReporter().handle(Event.error("Version information not available")); |
| return BlazeCommandResult.exitCode(ExitCode.COMMAND_LINE_ERROR); |
| } |
| env.getEventBus().post(new NoBuildEvent()); |
| env.getReporter().getOutErr().printOutLn(info.getSummary()); |
| return BlazeCommandResult.exitCode(ExitCode.SUCCESS); |
| } |
| } |