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      1 /*
      2  * Copyright (C) 2010 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 
     17 package com.android.ant;
     18 
     19 import com.android.sdklib.SdkConstants;
     20 import com.android.sdklib.internal.project.ProjectProperties;
     21 
     22 import org.apache.tools.ant.BuildException;
     23 import org.apache.tools.ant.Project;
     24 import org.apache.tools.ant.types.Path;
     25 
     26 import java.io.File;
     27 import java.io.FileInputStream;
     28 import java.io.FileNotFoundException;
     29 import java.io.IOException;
     30 import java.util.Properties;
     31 
     32 final class TaskHelper {
     33 
     34     static File getSdkLocation(Project antProject) {
     35         // get the SDK location
     36         String sdkOsPath = antProject.getProperty(ProjectProperties.PROPERTY_SDK);
     37 
     38         // check if it's valid and exists
     39         if (sdkOsPath == null || sdkOsPath.length() == 0) {
     40             throw new BuildException("SDK Location is not set.");
     41         }
     42 
     43         File sdk = new File(sdkOsPath);
     44         if (sdk.isDirectory() == false) {
     45             throw new BuildException(String.format("SDK Location '%s' is not valid.", sdkOsPath));
     46         }
     47 
     48         return sdk;
     49     }
     50 
     51     /**
     52      * Returns the revision of the tools for a given SDK.
     53      * @param sdkFile the {@link File} for the root folder of the SDK
     54      * @return the tools revision or -1 if not found.
     55      */
     56     static int getToolsRevision(File sdkFile) {
     57         Properties p = new Properties();
     58         try{
     59             // tools folder must exist, or this custom task wouldn't run!
     60             File toolsFolder= new File(sdkFile, SdkConstants.FD_TOOLS);
     61             File sourceProp = new File(toolsFolder, SdkConstants.FN_SOURCE_PROP);
     62 
     63             FileInputStream fis = null;
     64             try {
     65                 fis = new FileInputStream(sourceProp);
     66                 p.load(fis);
     67             } finally {
     68                 if (fis != null) {
     69                     try {
     70                         fis.close();
     71                     } catch (IOException ignore) {
     72                     }
     73                 }
     74             }
     75 
     76             String value = p.getProperty("Pkg.Revision"); //$NON-NLS-1$
     77             if (value != null) {
     78                 return Integer.parseInt(value);
     79             }
     80         } catch (FileNotFoundException e) {
     81             // couldn't find the file? return -1 below.
     82         } catch (IOException e) {
     83             // couldn't find the file? return -1 below.
     84         }
     85 
     86         return -1;
     87     }
     88 
     89     static String checkSinglePath(String attribute, Path path) {
     90         String[] paths = path.list();
     91         if (paths.length != 1) {
     92             throw new BuildException(String.format(
     93                     "Value for '%1$s' is not valid. It must resolve to a single path", attribute));
     94         }
     95 
     96         return paths[0];
     97     }
     98 }
     99