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
|
// Copyright 2014 The Bazel Authors. All rights reserved.
//
// 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.devtools.build.lib.rules.repository;
import com.google.devtools.build.lib.actions.FileValue;
import com.google.devtools.build.lib.actions.InconsistentFilesystemException;
import com.google.devtools.build.lib.analysis.BlazeDirectories;
import com.google.devtools.build.lib.analysis.RuleDefinition;
import com.google.devtools.build.lib.packages.Rule;
import com.google.devtools.build.lib.skyframe.DirectoryListingValue;
import com.google.devtools.build.lib.vfs.FileSystem;
import com.google.devtools.build.lib.vfs.Path;
import com.google.devtools.build.lib.vfs.PathFragment;
import com.google.devtools.build.lib.vfs.Root;
import com.google.devtools.build.lib.vfs.RootedPath;
import com.google.devtools.build.skyframe.SkyFunction.Environment;
import com.google.devtools.build.skyframe.SkyFunctionException;
import com.google.devtools.build.skyframe.SkyFunctionException.Transience;
import com.google.devtools.build.skyframe.SkyKey;
import java.io.IOException;
import java.util.Map;
/**
* Create a repository from a directory on the local filesystem.
*/
public class NewLocalRepositoryFunction extends RepositoryFunction {
@Override
public boolean isLocal(Rule rule) {
return true;
}
@Override
public RepositoryDirectoryValue.Builder fetch(Rule rule, Path outputDirectory,
BlazeDirectories directories, Environment env, Map<String, String> markerData)
throws SkyFunctionException, InterruptedException {
NewRepositoryFileHandler fileHandler = new NewRepositoryFileHandler(directories.getWorkspace());
if (!fileHandler.prepareFile(rule, env)) {
return null;
}
PathFragment pathFragment = getTargetPath(rule, directories.getWorkspace());
FileSystem fs = directories.getOutputBase().getFileSystem();
Path path = fs.getPath(pathFragment);
RootedPath dirPath = RootedPath.toRootedPath(Root.absoluteRoot(fs), path);
try {
FileValue dirFileValue =
(FileValue) env.getValueOrThrow(FileValue.key(dirPath), IOException.class);
if (dirFileValue == null) {
return null;
}
if (!dirFileValue.exists()) {
throw new RepositoryFunctionException(
new IOException(
"Expected directory at "
+ dirPath.asPath().getPathString()
+ " but it does not exist."),
Transience.PERSISTENT);
}
if (!dirFileValue.isDirectory()) {
// Someone tried to create a local repository from a file.
throw new RepositoryFunctionException(
new IOException(
"Expected directory at "
+ dirPath.asPath().getPathString()
+ " but it is not a directory."),
Transience.PERSISTENT);
}
} catch (IOException e) {
throw new RepositoryFunctionException(e, Transience.PERSISTENT);
}
// fetch() creates symlinks to each child under 'path' and DiffAwareness handles checking all
// of these files and directories for changes. However, if a new file/directory is added
// directly under 'path', Bazel doesn't know that this has to be symlinked in. Thus, this
// creates a dependency on the contents of the 'path' directory.
SkyKey dirKey = DirectoryListingValue.key(dirPath);
DirectoryListingValue directoryValue;
try {
directoryValue = (DirectoryListingValue) env.getValueOrThrow(
dirKey, InconsistentFilesystemException.class);
} catch (InconsistentFilesystemException e) {
throw new RepositoryFunctionException(new IOException(e), Transience.PERSISTENT);
}
if (directoryValue == null) {
return null;
}
// Link x/y/z to /some/path/to/y/z.
if (!symlinkLocalRepositoryContents(outputDirectory, path)) {
return null;
}
fileHandler.finishFile(rule, outputDirectory, markerData);
return RepositoryDirectoryValue.builder().setPath(outputDirectory).setSourceDir(directoryValue);
}
@Override
public Class<? extends RuleDefinition> getRuleDefinition() {
return NewLocalRepositoryRule.class;
}
}
|
