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// Copyright 2014 Google Inc. 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.util;
/**
* Detects the running operating system and returns a describing enum value.
*/
public enum OS {
DARWIN("osx", "Mac OS X"),
FREEBSD("freebsd", "FreeBSD"),
LINUX("linux", "Linux"),
WINDOWS("windows", "Windows"),
UNKNOWN("unknown", "");
private final String canonicalName;
private final String detectionName;
OS(String canonicalName, String detectionName) {
this.canonicalName = canonicalName;
this.detectionName = detectionName;
}
/**
* The current operating system.
*/
public static OS getCurrent() {
return HOST_SYSTEM;
}
public String getCanonicalName() {
return canonicalName;
}
@Override
public String toString() {
return getCanonicalName();
}
// We inject a the OS name through blaze.os, so we can have
// some coverage for Windows specific code on Linux.
private static OS determineCurrentOs() {
String osName = System.getProperty("blaze.os");
if (osName == null) {
osName = System.getProperty("os.name");
}
if (osName == null) {
return OS.UNKNOWN;
}
for (OS os : OS.values()) {
// Windows have many names, all starting with "Windows".
if (osName.startsWith(os.detectionName)) {
return os;
}
}
return OS.UNKNOWN;
}
private static final OS HOST_SYSTEM = determineCurrentOs();
}
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