blob: eb0f64598722b10792e957681d25bcf484bbc9f4 (
plain)
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
|
// Copyright 2015 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.skyframe;
import com.google.common.collect.ImmutableSet;
import com.google.common.io.CharStreams;
import com.google.common.io.LineProcessor;
import com.google.devtools.build.lib.actions.FileValue;
import com.google.devtools.build.lib.actions.InconsistentFilesystemException;
import com.google.devtools.build.lib.pkgcache.PathPackageLocator;
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;
import com.google.devtools.build.skyframe.SkyFunctionException;
import com.google.devtools.build.skyframe.SkyKey;
import com.google.devtools.build.skyframe.SkyValue;
import java.io.IOException;
import java.io.InputStreamReader;
import java.nio.charset.StandardCharsets;
import javax.annotation.Nullable;
/**
* A function that returns the union of a set of hardcoded blacklisted package prefixes and the
* contents of a hardcoded filepath whose contents is a blacklisted package prefix on each line.
*/
public class BlacklistedPackagePrefixesFunction implements SkyFunction {
private ImmutableSet<PathFragment> hardcodedBlacklistedPackagePrefixes;
private PathFragment additionalBlacklistedPackagePrefixesFile;
public BlacklistedPackagePrefixesFunction(
ImmutableSet<PathFragment> hardcodedBlacklistedPackagePrefixes,
PathFragment additionalBlacklistedPackagePrefixesFile) {
this.hardcodedBlacklistedPackagePrefixes = hardcodedBlacklistedPackagePrefixes;
this.additionalBlacklistedPackagePrefixesFile = additionalBlacklistedPackagePrefixesFile;
}
@Nullable
@Override
public SkyValue compute(SkyKey key, Environment env)
throws SkyFunctionException, InterruptedException {
ImmutableSet.Builder<PathFragment> blacklistedPackagePrefixesBuilder = ImmutableSet.builder();
blacklistedPackagePrefixesBuilder.addAll(hardcodedBlacklistedPackagePrefixes);
if (!additionalBlacklistedPackagePrefixesFile.equals(PathFragment.EMPTY_FRAGMENT)) {
PathPackageLocator pkgLocator = PrecomputedValue.PATH_PACKAGE_LOCATOR.get(env);
if (env.valuesMissing()) {
return null;
}
for (Root packagePathEntry : pkgLocator.getPathEntries()) {
RootedPath rootedPatternFile =
RootedPath.toRootedPath(packagePathEntry, additionalBlacklistedPackagePrefixesFile);
FileValue patternFileValue = (FileValue) env.getValue(FileValue.key(rootedPatternFile));
if (patternFileValue == null) {
return null;
}
if (patternFileValue.isFile()) {
try {
try (InputStreamReader reader =
new InputStreamReader(rootedPatternFile.asPath().getInputStream(),
StandardCharsets.UTF_8)) {
blacklistedPackagePrefixesBuilder.addAll(
CharStreams.readLines(reader, new PathFragmentLineProcessor()));
break;
}
} catch (IOException e) {
String errorMessage = e.getMessage() != null
? "error '" + e.getMessage() + "'" : "an error";
throw new BlacklistedPatternsFunctionException(
new InconsistentFilesystemException(
rootedPatternFile.asPath() + " is not readable because: " + errorMessage
+ ". Was it modified mid-build?"));
}
}
}
}
return new BlacklistedPackagePrefixesValue(blacklistedPackagePrefixesBuilder.build());
}
private static final class PathFragmentLineProcessor
implements LineProcessor<ImmutableSet<PathFragment>> {
private final ImmutableSet.Builder<PathFragment> fragments = ImmutableSet.builder();
@Override
public boolean processLine(String line) throws IOException {
if (!line.isEmpty()) {
fragments.add(PathFragment.create(line));
}
return true;
}
@Override
public ImmutableSet<PathFragment> getResult() {
return fragments.build();
}
}
@Nullable
@Override
public String extractTag(SkyKey skyKey) {
return null;
}
private static final class BlacklistedPatternsFunctionException extends SkyFunctionException {
public BlacklistedPatternsFunctionException(InconsistentFilesystemException e) {
super(e, Transience.TRANSIENT);
}
}
}
|
