org.spearce.jgit.pgm/src/org/spearce/jgit/pgm/Main.java

   1 /*
   2  * Copyright (C) 2006, Robin Rosenberg <robin.rosenberg@dewire.com>
   3  * Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org>
   4  *
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or
   8  * without modification, are permitted provided that the following
   9  * conditions are met:
  10  *
  11  * - Redistributions of source code must retain the above copyright
  12  *   notice, this list of conditions and the following disclaimer.
  13  *
  14  * - Redistributions in binary form must reproduce the above
  15  *   copyright notice, this list of conditions and the following
  16  *   disclaimer in the documentation and/or other materials provided
  17  *   with the distribution.
  18  *
  19  * - Neither the name of the Git Development Community nor the
  20  *   names of its contributors may be used to endorse or promote
  21  *   products derived from this software without specific prior
  22  *   written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
  25  * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
  26  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  27  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  28  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  29  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  30  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  31  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  32  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  33  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  34  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  36  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  37  */
  38
  39 package org.spearce.jgit.pgm;
  40
  41 import java.io.File;
  42 import java.util.ArrayList;
  43 import java.util.List;
  44
  45 import org.kohsuke.args4j.Argument;
  46 import org.kohsuke.args4j.CmdLineException;
  47 import org.kohsuke.args4j.ExampleMode;
  48 import org.kohsuke.args4j.Option;
  49 import org.spearce.jgit.awtui.AwtAuthenticator;
  50 import org.spearce.jgit.errors.TransportException;
  51 import org.spearce.jgit.lib.Repository;
  52 import org.spearce.jgit.pgm.opt.CmdLineParser;
  53 import org.spearce.jgit.pgm.opt.SubcommandHandler;
  54 import org.spearce.jgit.util.HttpSupport;
  55
  56 /** Command line entry point. */
  57 public class Main {
  58         @Option(name = "--help", usage = "display this help text", aliases = { "-h" })
  59         private boolean help;
  60
  61         @Option(name = "--show-stack-trace", usage = "display the Java stack trace on exceptions")
  62         private boolean showStackTrace;
  63
  64         @Option(name = "--git-dir", metaVar = "GIT_DIR", usage = "set the git repository to operate on")
  65         private File gitdir;
  66
  67         @Argument(index = 0, metaVar = "command", required = true, handler = SubcommandHandler.class)
  68         private TextBuiltin subcommand;
  69
  70         @Argument(index = 1, metaVar = "ARG")
  71         private List<String> arguments = new ArrayList<String>();
  72
  73         /**
  74          * Execute the command line.
  75          *
  76          * @param argv
  77          *            arguments.
  78          */
  79         public static void main(final String[] argv) {
  80                 final Main me = new Main();
  81                 try {
  82                         AwtAuthenticator.install();
  83                         HttpSupport.configureHttpProxy();
  84                         me.execute(argv);
  85                 } catch (Die err) {
  86                         System.err.println("fatal: " + err.getMessage());
  87                         if (me.showStackTrace)
  88                                 err.printStackTrace();
  89                         System.exit(128);
  90                 } catch (Exception err) {
  91                         if (!me.showStackTrace && err.getCause() != null
  92                                         && err instanceof TransportException)
  93                                 System.err.println("fatal: " + err.getCause().getMessage());
  94
  95                         if (err.getClass().getName().startsWith("org.spearce.jgit.errors.")) {
  96                                 System.err.println("fatal: " + err.getMessage());
  97                                 if (me.showStackTrace)
  98                                         err.printStackTrace();
  99                                 System.exit(128);
 100                         }
 101                         err.printStackTrace();
 102                         System.exit(1);
 103                 }
 104         }
 105
 106         private void execute(final String[] argv) throws Exception {
 107                 final CmdLineParser clp = new CmdLineParser(this);
 108                 try {
 109                         clp.parseArgument(argv);
 110                 } catch (CmdLineException err) {
 111                         if (argv.length > 0 && !help) {
 112                                 System.err.println("fatal: " + err.getMessage());
 113                                 System.exit(1);
 114                         }
 115                 }
 116
 117                 if (argv.length == 0 || help) {
 118                         final String ex = clp.printExample(ExampleMode.ALL);
 119                         System.err.println("jgit" + ex + " command [ARG ...]");
 120                         if (help) {
 121                                 System.err.println();
 122                                 clp.printUsage(System.err);
 123                                 System.err.println();
 124                         }
 125                         System.exit(1);
 126                 }
 127
 128                 if (gitdir == null)
 129                         gitdir = findGitDir();
 130                 if (gitdir == null || !gitdir.isDirectory()) {
 131                         System.err.println("error: can't find git directory");
 132                         System.exit(1);
 133                 }
 134
 135                 final TextBuiltin cmd = subcommand;
 136                 cmd.init(new Repository(gitdir));
 137                 try {
 138                         cmd.execute(arguments.toArray(new String[arguments.size()]));
 139                 } finally {
 140                         if (cmd.out != null)
 141                                 cmd.out.flush();
 142                 }
 143         }
 144
 145         private static File findGitDir() {
 146                 File current = new File(".").getAbsoluteFile();
 147                 while (current != null) {
 148                         final File gitDir = new File(current, ".git");
 149                         if (gitDir.isDirectory())
 150                                 return gitDir;
 151                         current = current.getParentFile();
 152                 }
 153                 return null;
 154         }
 155 }