Move org.spearce.jgit.pgm to its own Java project
[egit/graphgui.git] / org.spearce.jgit.pgm / src / org / spearce / jgit / pgm / TextBuiltin.java
blobb3d8f3981b4d38645c5169afec58db639dd6ddff
1 /*
2 * Copyright (C) 2007, Robin Rosenberg <robin.rosenberg@dewire.com>
3 * Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org>
5 * All rights reserved.
7 * Redistribution and use in source and binary forms, with or
8 * without modification, are permitted provided that the following
9 * conditions are met:
11 * - Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
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.
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.
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.
39 package org.spearce.jgit.pgm;
41 import java.io.BufferedWriter;
42 import java.io.IOException;
43 import java.io.OutputStreamWriter;
44 import java.io.PrintWriter;
46 import org.spearce.jgit.lib.Constants;
47 import org.spearce.jgit.lib.ObjectId;
48 import org.spearce.jgit.lib.Repository;
50 abstract class TextBuiltin {
51 protected static final String REFS_HEADS = Constants.HEADS_PREFIX + "/";
53 protected static final String REFS_REMOTES = Constants.REMOTES_PREFIX + "/";
55 protected static final String REFS_TAGS = Constants.TAGS_PREFIX + "/";
57 protected PrintWriter out;
59 protected Repository db;
61 TextBuiltin() {
62 try {
63 out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(
64 System.out, "UTF-8")));
65 } catch (IOException e) {
66 throw die("cannot create output stream");
70 abstract void execute(String[] args) throws Exception;
72 protected ObjectId resolve(final String s) throws IOException {
73 final ObjectId r = db.resolve(s);
74 if (r == null)
75 throw die("Not a revision: " + s);
76 return r;
79 protected static Die die(final String why) {
80 return new Die(why);
83 protected static String abbreviateObject(final ObjectId id) {
84 return id.toString().substring(0, 7);
87 protected String abbreviateRef(String dst, boolean abbreviateRemote) {
88 if (dst.startsWith(REFS_HEADS))
89 dst = dst.substring(REFS_HEADS.length());
90 else if (dst.startsWith(REFS_TAGS))
91 dst = dst.substring(REFS_TAGS.length());
92 else if (abbreviateRemote && dst.startsWith(REFS_REMOTES))
93 dst = dst.substring(REFS_REMOTES.length());
94 return dst;