1 /*
2 * Copyright (C) 2017, Google Inc.
3 * and other copyright owners as documented in the project's IP log.
4 *
5 * This program and the accompanying materials are made available
6 * under the terms of the Eclipse Distribution License v1.0 which
7 * accompanies this distribution, is reproduced below, and is
8 * available at http://www.eclipse.org/org/documents/edl-v10.php
9 *
10 * All rights reserved.
11 *
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * - Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials provided
22 * with the distribution.
23 *
24 * - Neither the name of the Eclipse Foundation, Inc. nor the
25 * names of its contributors may be used to endorse or promote
26 * products derived from this software without specific prior
27 * written permission.
28 *
29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
30 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
31 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
32 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
34 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
35 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
36 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
37 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
38 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
40 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
41 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
42 */
43
44 package org.eclipse.jgit.pgm.debug;
45
46 import java.io.FileInputStream;
47 import java.io.IOException;
48
49 import org.eclipse.jgit.internal.storage.io.BlockSource;
50 import org.eclipse.jgit.internal.storage.reftable.RefCursor;
51 import org.eclipse.jgit.internal.storage.reftable.ReftableReader;
52 import org.eclipse.jgit.lib.ObjectId;
53 import org.eclipse.jgit.lib.Ref;
54 import org.eclipse.jgit.pgm.Command;
55 import org.eclipse.jgit.pgm.TextBuiltin;
56 import org.kohsuke.args4j.Argument;
57
58 @Command
59 class ReadReftable extends TextBuiltin {
60 @Argument(index = 0)
61 private String input;
62
63 @Argument(index = 1, required = false)
64 private String ref;
65
66 /** {@inheritDoc} */
67 @Override
68 protected void run() throws Exception {
69 try (FileInputStream in = new FileInputStream(input);
70 BlockSource src = BlockSource.from(in);
71 ReftableReader reader = new ReftableReader(src)) {
72 try (RefCursor rc = ref != null
73 ? reader.seekRefsWithPrefix(ref)
74 : reader.allRefs()) {
75 while (rc.next()) {
76 write(rc.getRef());
77 }
78 }
79 }
80 }
81
82 private void write(Ref r) throws IOException {
83 if (r.isSymbolic()) {
84 outw.println(r.getTarget().getName() + '\t' + r.getName());
85 return;
86 }
87
88 ObjectId id1 = r.getObjectId();
89 if (id1 != null) {
90 outw.println(id1.name() + '\t' + r.getName());
91 }
92
93 ObjectId id2 = r.getPeeledObjectId();
94 if (id2 != null) {
95 outw.println('^' + id2.name());
96 }
97 }
98 }