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.Arrays;
  43
  44 import org.spearce.jgit.awtui.AwtAuthenticator;
  45 import org.spearce.jgit.errors.TransportException;
  46 import org.spearce.jgit.lib.Repository;
  47 import org.spearce.jgit.pgm.opt.CmdLineParser;
  48 import org.spearce.jgit.pgm.opt.SubcommandHandler;
  49 import org.spearce.jgit.util.HttpSupport;
  50
  51 /** Command line entry point. */
  52 public class Main {
  53         private static boolean showStackTrace;
  54
  55         /**
  56          * Execute the command line.
  57          *
  58          * @param argv
  59          *            arguments.
  60          */
  61         public static void main(final String[] argv) {
  62                 try {
  63                         AwtAuthenticator.install();
  64                         HttpSupport.configureHttpProxy();
  65                         execute(argv);
  66                 } catch (Die err) {
  67                         System.err.println("fatal: " + err.getMessage());
  68                         if (showStackTrace)
  69                                 err.printStackTrace();
  70                         System.exit(128);
  71                 } catch (Exception err) {
  72                         if (!showStackTrace && err.getCause() != null
  73                                         && err instanceof TransportException)
  74                                 System.err.println("fatal: " + err.getCause().getMessage());
  75
  76                         if (err.getClass().getName().startsWith("org.spearce.jgit.errors.")) {
  77                                 System.err.println("fatal: " + err.getMessage());
  78                                 if (showStackTrace)
  79                                         err.printStackTrace();
  80                                 System.exit(128);
  81                         }
  82                         err.printStackTrace();
  83                         System.exit(1);
  84                 }
  85         }
  86
  87         private static void execute(final String[] argv) throws Exception {
  88                 int argi = 0;
  89
  90                 File gitdir = null;
  91                 for (; argi < argv.length; argi++) {
  92                         final String arg = argv[argi];
  93                         if (arg.startsWith("--git-dir="))
  94                                 gitdir = new File(arg.substring("--git-dir=".length()));
  95                         else if (arg.equals("--show-stack-trace"))
  96                                 showStackTrace = true;
  97                         else if (arg.startsWith("--"))
  98                                 usage();
  99                         else
 100                                 break;
 101                 }
 102
 103                 if (argi == argv.length)
 104                         usage();
 105                 if (gitdir == null)
 106                         gitdir = findGitDir();
 107                 if (gitdir == null || !gitdir.isDirectory()) {
 108                         System.err.println("error: can't find git directory");
 109                         System.exit(1);
 110                 }
 111
 112                 final TextBuiltin cmd = createCommand(argv[argi++]);
 113                 cmd.init(new Repository(gitdir));
 114                 try {
 115                         cmd.execute(subarray(argv, argi));
 116                 } finally {
 117                         if (cmd.out != null)
 118                                 cmd.out.flush();
 119                 }
 120         }
 121
 122         private static File findGitDir() {
 123                 File current = new File(".").getAbsoluteFile();
 124                 while (current != null) {
 125                         final File gitDir = new File(current, ".git");
 126                         if (gitDir.isDirectory())
 127                                 return gitDir;
 128                         current = current.getParentFile();
 129                 }
 130                 return null;
 131         }
 132
 133         private static String[] subarray(final String[] argv, final int i) {
 134                 return Arrays.asList(argv).subList(i, argv.length).toArray(
 135                                 new String[0]);
 136         }
 137
 138         private static TextBuiltin createCommand(final String name) {
 139                 final StringBuilder s = new StringBuilder();
 140                 s.append(mypackage());
 141                 s.append('.');
 142                 boolean upnext = true;
 143                 for (int i = 0; i < name.length(); i++) {
 144                         final char c = name.charAt(i);
 145                         if (c == '-') {
 146                                 upnext = true;
 147                                 continue;
 148                         }
 149                         if (upnext)
 150                                 s.append(Character.toUpperCase(c));
 151                         else
 152                                 s.append(c);
 153                         upnext = false;
 154                 }
 155                 try {
 156                         return (TextBuiltin) Class.forName(s.toString()).newInstance();
 157                 } catch (Exception e) {
 158                         System.err.println("error: " + name + " is not a jgit command.");
 159                         System.exit(1);
 160                         return null;
 161                 }
 162         }
 163
 164         private static String mypackage() {
 165                 final String p = Main.class.getName();
 166                 final int dot = p.lastIndexOf('.');
 167                 return p.substring(0, dot);
 168         }
 169
 170         private static void usage() {
 171                 System.err.println("jgit [--git-dir=path] cmd ...");
 172                 System.exit(1);
 173         }
 174 }