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
|
// Copyright 2014 Google Inc. 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.bazel.repository;
import com.google.devtools.build.lib.analysis.RuleDefinition;
import com.google.devtools.build.lib.bazel.rules.workspace.LocalRepositoryRule;
import com.google.devtools.build.lib.cmdline.PackageIdentifier.RepositoryName;
import com.google.devtools.build.lib.packages.AggregatingAttributeMapper;
import com.google.devtools.build.lib.packages.Rule;
import com.google.devtools.build.lib.skyframe.FileValue;
import com.google.devtools.build.lib.skyframe.RepositoryValue;
import com.google.devtools.build.lib.syntax.EvalException;
import com.google.devtools.build.lib.syntax.Type;
import com.google.devtools.build.lib.vfs.FileSystemUtils;
import com.google.devtools.build.lib.vfs.Path;
import com.google.devtools.build.lib.vfs.PathFragment;
import com.google.devtools.build.skyframe.SkyFunctionException;
import com.google.devtools.build.skyframe.SkyFunctionException.Transience;
import com.google.devtools.build.skyframe.SkyFunctionName;
import com.google.devtools.build.skyframe.SkyKey;
import com.google.devtools.build.skyframe.SkyValue;
import java.io.IOException;
/**
* Access a repository on the local filesystem.
*/
public class LocalRepositoryFunction extends RepositoryFunction {
@Override
public SkyValue compute(SkyKey skyKey, Environment env) throws SkyFunctionException {
RepositoryName repositoryName = (RepositoryName) skyKey.argument();
Rule rule = RepositoryFunction.getRule(repositoryName, LocalRepositoryRule.NAME, env);
if (rule == null) {
return null;
}
AggregatingAttributeMapper mapper = AggregatingAttributeMapper.of(rule);
String path = mapper.get("path", Type.STRING);
PathFragment pathFragment = new PathFragment(path);
if (!pathFragment.isAbsolute()) {
throw new RepositoryFunctionException(
new EvalException(
rule.getLocation(),
"In " + rule + " the 'path' attribute must specify an absolute path"),
Transience.PERSISTENT);
}
Path repositoryPath = getExternalRepositoryDirectory().getRelative(rule.getName());
try {
FileSystemUtils.createDirectoryAndParents(repositoryPath.getParentDirectory());
if (repositoryPath.exists()) {
repositoryPath.delete();
}
repositoryPath.createSymbolicLink(pathFragment);
} catch (IOException e) {
throw new RepositoryFunctionException(
new IOException("Could not create symlink to repository " + pathFragment + ": "
+ e.getMessage()), Transience.TRANSIENT);
}
FileValue repositoryValue = getRepositoryDirectory(repositoryPath, env);
if (repositoryValue == null) {
// TODO(bazel-team): If this returns null, we unnecessarily recreate the symlink above on the
// second execution.
return null;
}
if (!repositoryValue.isDirectory()) {
throw new RepositoryFunctionException(
new IOException(rule + " must specify an existing directory"), Transience.TRANSIENT);
}
return RepositoryValue.create(repositoryPath, repositoryValue);
}
@Override
public SkyFunctionName getSkyFunctionName() {
return SkyFunctionName.create(LocalRepositoryRule.NAME.toUpperCase());
}
@Override
public Class<? extends RuleDefinition> getRuleDefinition() {
return LocalRepositoryRule.class;
}
}
|
