From mboxrd@z Thu Jan 1 00:00:00 1970 From: Florian Koeberle Subject: [JGIT PATCH v2 01/24] Start of an implementation of a git like command line tool. Date: Mon, 12 May 2008 22:13:19 +0200 Message-ID: <1210623222-24908-2-git-send-email-florianskarten@web.de> References: <1210623222-24908-1-git-send-email-florianskarten@web.de> Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: Florian Koeberle To: git@vger.kernel.org X-From: git-owner@vger.kernel.org Mon May 12 22:21:54 2008 Return-path: Envelope-to: gcvg-git-2@gmane.org Received: from vger.kernel.org ([209.132.176.167]) by lo.gmane.org with esmtp (Exim 4.50) id 1JveQD-0006mx-1m for gcvg-git-2@gmane.org; Mon, 12 May 2008 22:14:57 +0200 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754800AbYELUNs (ORCPT ); Mon, 12 May 2008 16:13:48 -0400 X-Warning: Original message contained 8-bit characters, however during the SMTP transport session the receiving system did not announce capability of receiving 8-bit SMTP (RFC 1651-1653), and as this message does not have MIME headers (RFC 2045-2049) to enable encoding change, we had very little choice. 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Signed-off-by: Florian Koeberle --- .../src/org/spearce/jgit/pgm/Command.java | 44 ++++++++ .../src/org/spearce/jgit/pgm/MainProgram.java | 114 ++++++++++++= ++++++++ 2 files changed, 158 insertions(+), 0 deletions(-) create mode 100644 org.spearce.jgit/src/org/spearce/jgit/pgm/Command.j= ava create mode 100644 org.spearce.jgit/src/org/spearce/jgit/pgm/MainProgr= am.java diff --git a/org.spearce.jgit/src/org/spearce/jgit/pgm/Command.java b/o= rg.spearce.jgit/src/org/spearce/jgit/pgm/Command.java new file mode 100644 index 0000000..a05f707 --- /dev/null +++ b/org.spearce.jgit/src/org/spearce/jgit/pgm/Command.java @@ -0,0 +1,44 @@ +/* + * Copyright (C) 2008 Florian K=C3=B6berle + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public + * License, version 2, as published by the Free Software Foundation. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public + * License along with this library; if not, write to the Free Softwar= e + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 021= 10-1301 + */ +package org.spearce.jgit.pgm; + +import java.io.IOException; + +/** + * A command have tasks like the "git-add", "git-help" or "git-init" c= onsole + * commands. Instances of ${link Command} must be immutable. + *=20 + */ +public interface Command { + /** + * Executes the specified Command. + *=20 + * @param args + * the arguments which you would pass to the console equiv= alent + * of the command. + * @throws IOException + * for some undefined reasons. + */ + public void execute(String... args) throws IOException; + + /** + *=20 + * @return a short description about what the command does. Short mea= ns in + * this context 5 - 10 words. + */ + public String getShortDescription(); +} diff --git a/org.spearce.jgit/src/org/spearce/jgit/pgm/MainProgram.java= b/org.spearce.jgit/src/org/spearce/jgit/pgm/MainProgram.java new file mode 100644 index 0000000..c9af51c --- /dev/null +++ b/org.spearce.jgit/src/org/spearce/jgit/pgm/MainProgram.java @@ -0,0 +1,114 @@ +/* + * Copyright (C) 2008 Florian K=C3=B6berle + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public + * License, version 2, as published by the Free Software Foundation. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public + * License along with this library; if not, write to the Free Softwar= e + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 021= 10-1301 + */ +package org.spearce.jgit.pgm; + +import java.io.IOException; +import java.util.Collections; +import java.util.HashMap; +import java.util.Map; +import java.util.SortedMap; +import java.util.TreeMap; + +/** + * A program which works similar like the command git, except that ver= y view + * arguments are supported jet. + *=20 + */ +public class MainProgram { + private final static Map commandNameToObjectMap; + + static { + final Map commands =3D new HashMap= (); + commands.put("help", HelpCommand.INSTANCE); + commandNameToObjectMap =3D Collections.unmodifiableMap(commands); + } + + /** + * Executes a command with some arguments. There are commands for cre= ating + * git repositories, tracking files, etc. + *=20 + * @param args + * The first argument specifies the command which should b= e + * executed. The other arguments are passed to the command= =2E + * @throws IOException + * for some reasons. + */ + public static void main(String[] args) throws IOException { + try { + if (args.length =3D=3D 0) { + throw new WrongCallException("Require one argument!"); + } + final Command command =3D commandNameToObjectMap.get(args[0]); + if (command =3D=3D null) { + throw new WrongCallException("Require one argument!"); + } + + final String[] commandArguments =3D new String[args.length - 1]; + System.arraycopy(args, 1, commandArguments, 0, + commandArguments.length); + + command.execute(commandArguments); + + } catch (WrongCallException e) { + System.err.println(e.getMessage()); + System.err.println(); + HelpCommand.INSTANCE.execute(); + System.exit(1); + } + } + + private static class WrongCallException extends Exception { + private static final long serialVersionUID =3D 3643362832429311084L; + + WrongCallException(String message) { + super(message); + } + } + + private static class HelpCommand implements Command { + /** + * Use this instance instead of creating a new ${link HelpCommand}. = You + * don't need to create an instance of this class as it is immutable= and + * not configurable. + */ + public static HelpCommand INSTANCE =3D new HelpCommand(); + + public void execute(String... args) throws IOException { + System.out + .println("Call this program with the following arguments:"); + System.out + .println("commandName commandArgument0 commandArgument1 ..."); + System.out.println(); + System.out + .println("Currently the following commands are supported:"); + final SortedMap sortedCommandMap =3D new TreeMap( + MainProgram.commandNameToObjectMap); + for (Map.Entry commandEntry : sortedCommandMap + .entrySet()) { + final String commandName =3D commandEntry.getKey(); + final String commandDescription =3D commandEntry.getValue() + .getShortDescription(); + System.out.printf("%#10s - %s%n", commandName, + commandDescription); + } + } + + public String getShortDescription() { + return "Displays some text about how to use this program."; + } + } +} --=20 1.5.4.3