1 /* 2 * Copyright (C) 2013 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.android.tradefed.util; 17 18 import com.android.tradefed.log.LogUtil.CLog; 19 20 import java.io.File; 21 import java.io.IOException; 22 23 /** Fetch the version of the running tradefed artifacts. */ 24 public class VersionParser { 25 26 public static final String DEFAULT_IMPLEMENTATION_VERSION = "default"; 27 private static final String VERSION_FILE = "version.txt"; 28 fetchVersion()29 public static String fetchVersion() { 30 return getPackageVersion(); 31 } 32 33 /** 34 * Version fetcher on the implementation version of the jar files from this class to ensure 35 * a match in the classloader. 36 */ getPackageVersion()37 private static String getPackageVersion() { 38 Package p = VersionParser.class.getPackage(); 39 if (p != null) { 40 String packageVersion = p.getImplementationVersion(); 41 if (packageVersion != null && !DEFAULT_IMPLEMENTATION_VERSION.equals(packageVersion)) { 42 return packageVersion; 43 } 44 } 45 File dir = getTradefedJarDir(); 46 if (dir != null) { 47 File versionFile = new File(dir, VERSION_FILE); 48 if (versionFile.exists()) { 49 try { 50 String version = FileUtil.readStringFromFile(versionFile); 51 return version.trim(); 52 } catch (IOException e) { 53 // Failed to fetch version. 54 CLog.e(e); 55 } 56 } 57 CLog.e("Did not find Version file in directory: %s", dir.getAbsolutePath()); 58 } 59 return null; 60 } 61 getTradefedJarDir()62 private static File getTradefedJarDir() { 63 try { 64 File f = 65 new File( 66 VersionParser.class 67 .getProtectionDomain() 68 .getCodeSource() 69 .getLocation() 70 .getPath()); 71 return f.getParentFile(); 72 } catch (Exception e) { 73 CLog.e("Failed to find TF JAR dir:"); 74 CLog.e(e); 75 } 76 return null; 77 } 78 } 79