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      1 /*
      2  * Copyright (C) 2017 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.tools.appbundle.bundletool;
     18 
     19 import com.android.tools.appbundle.bundletool.utils.FlagParser;
     20 import java.io.IOException;
     21 import java.util.List;
     22 
     23 /**
     24  * Main entry point of the bundle tool.
     25  *
     26  * <p>Consider running with -Dsun.zip.disableMemoryMapping when dealing with large bundles.
     27  */
     28 public class BundleToolMain {
     29 
     30   public static final String LINK_CMD = "link";
     31   public static final String HELP_CMD = "help";
     32 
     33   /** Parses the flags and routes to the appropriate command handler */
     34   public static void main(String[] args) throws IOException {
     35 
     36     FlagParser flagParser = new FlagParser();
     37     try {
     38       flagParser.parse(args);
     39     } catch (FlagParser.ParseException e) {
     40       System.out.println(String.format("Error while parsing the flags: %s", e.getMessage()));
     41       return;
     42     }
     43     List<String> commands = flagParser.getCommands();
     44 
     45     if (commands.isEmpty()) {
     46       System.out.println("Error: you have to specify a command");
     47       help();
     48       return;
     49     }
     50 
     51     try {
     52       switch (commands.get(0)) {
     53         case BuildModuleCommand.COMMAND_NAME:
     54           BuildModuleCommand.fromFlags(flagParser).execute();
     55           break;
     56         case SplitModuleCommand.COMMAND_NAME:
     57           new SplitModuleCommand(flagParser).execute();
     58           break;
     59         case LINK_CMD:
     60           throw new UnsupportedOperationException("Not implemented.");
     61         case HELP_CMD:
     62           if (commands.size() > 1) {
     63             help(commands.get(1));
     64           } else {
     65             help();
     66           }
     67           return;
     68         default:
     69           System.out.println("Error: unrecognized command.");
     70           help();
     71       }
     72     } catch (Exception e) {
     73       System.out.println("Error: " + e.getMessage());
     74     }
     75   }
     76 
     77   /** Displays a general help. */
     78   public static void help() {
     79     System.out.println(
     80         String.format(
     81             "bundletool [%s|%s|%s|%s] ...",
     82             BuildModuleCommand.COMMAND_NAME, SplitModuleCommand.COMMAND_NAME, LINK_CMD, HELP_CMD));
     83     System.out.println("Type: bundletool help [command] to learn more about a given command.");
     84   }
     85 
     86   /** Displays help about a given command. */
     87   public static void help(String commandName) {
     88     switch (commandName) {
     89       case BuildModuleCommand.COMMAND_NAME:
     90         BuildModuleCommand.help();
     91         break;
     92       case SplitModuleCommand.COMMAND_NAME:
     93         SplitModuleCommand.help();
     94         break;
     95       case LINK_CMD:
     96         System.out.println("Help is not yet available.");
     97         break;
     98       default:
     99         System.out.println("Unrecognized command.");
    100         help();
    101         break;
    102     }
    103   }
    104 }
    105