1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
|
// Copyright (C) 2009 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.gerrit.server.patch;
import static java.nio.charset.StandardCharsets.UTF_8;
import com.google.gerrit.common.errors.NoSuchEntityException;
import com.google.gerrit.reviewdb.client.Patch;
import java.io.IOException;
import org.eclipse.jgit.errors.CorruptObjectException;
import org.eclipse.jgit.errors.IncorrectObjectTypeException;
import org.eclipse.jgit.errors.MissingObjectException;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.ObjectReader;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevObject;
import org.eclipse.jgit.revwalk.RevTree;
import org.eclipse.jgit.revwalk.RevWalk;
import org.eclipse.jgit.treewalk.TreeWalk;
/** State supporting processing of a single {@link Patch} instance. */
public class PatchFile {
private final Repository repo;
private final PatchListEntry entry;
private final RevTree aTree;
private final RevTree bTree;
private Text a;
private Text b;
public PatchFile(Repository repo, PatchList patchList, String fileName)
throws MissingObjectException, IncorrectObjectTypeException, IOException {
this.repo = repo;
this.entry = patchList.get(fileName);
try (ObjectReader reader = repo.newObjectReader();
RevWalk rw = new RevWalk(reader)) {
final RevCommit bCommit = rw.parseCommit(patchList.getNewId());
if (Patch.COMMIT_MSG.equals(fileName)) {
if (patchList.getComparisonType().isAgainstParentOrAutoMerge()) {
a = Text.EMPTY;
} else {
// For the initial commit, we have an empty tree on Side A
RevObject object = rw.parseAny(patchList.getOldId());
a = object instanceof RevCommit ? Text.forCommit(reader, object) : Text.EMPTY;
}
b = Text.forCommit(reader, bCommit);
aTree = null;
bTree = null;
} else if (Patch.MERGE_LIST.equals(fileName)) {
// For the initial commit, we have an empty tree on Side A
RevObject object = rw.parseAny(patchList.getOldId());
a =
object instanceof RevCommit
? Text.forMergeList(patchList.getComparisonType(), reader, object)
: Text.EMPTY;
b = Text.forMergeList(patchList.getComparisonType(), reader, bCommit);
aTree = null;
bTree = null;
} else {
if (patchList.getOldId() != null) {
aTree = rw.parseTree(patchList.getOldId());
} else {
final RevCommit p = bCommit.getParent(0);
rw.parseHeaders(p);
aTree = p.getTree();
}
bTree = bCommit.getTree();
}
}
}
private String getOldName() {
String name = entry.getOldName();
if (name != null) {
return name;
}
return entry.getNewName();
}
/**
* Extract a line from the file, as a string.
*
* @param file the file index to extract.
* @param line the line number to extract (1 based; 1 is the first line).
* @return the string version of the file line.
* @throws IOException the patch or complete file content cannot be read.
* @throws NoSuchEntityException
*/
public String getLine(int file, int line) throws IOException, NoSuchEntityException {
switch (file) {
case 0:
if (a == null) {
a = load(aTree, getOldName());
}
return a.getString(line - 1);
case 1:
if (b == null) {
b = load(bTree, entry.getNewName());
}
return b.getString(line - 1);
default:
throw new NoSuchEntityException();
}
}
/**
* Return number of lines in file.
*
* @param file the file index to extract.
* @return number of lines in file.
* @throws IOException the patch or complete file content cannot be read.
* @throws NoSuchEntityException the file is not exist.
*/
public int getLineCount(int file) throws IOException, NoSuchEntityException {
switch (file) {
case 0:
if (a == null) {
a = load(aTree, getOldName());
}
return a.size();
case 1:
if (b == null) {
b = load(bTree, entry.getNewName());
}
return b.size();
default:
throw new NoSuchEntityException();
}
}
private Text load(ObjectId tree, String path)
throws MissingObjectException, IncorrectObjectTypeException, CorruptObjectException,
IOException {
if (path == null) {
return Text.EMPTY;
}
final TreeWalk tw = TreeWalk.forPath(repo, path, tree);
if (tw == null) {
return Text.EMPTY;
}
if (tw.getFileMode(0).getObjectType() == Constants.OBJ_BLOB) {
return new Text(repo.open(tw.getObjectId(0), Constants.OBJ_BLOB));
} else if (tw.getFileMode(0).getObjectType() == Constants.OBJ_COMMIT) {
String str = "Subproject commit " + ObjectId.toString(tw.getObjectId(0));
return new Text(str.getBytes(UTF_8));
} else {
return Text.EMPTY;
}
}
}
|
