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
|
// Copyright 2016 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;
import com.google.common.collect.ImmutableCollection;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.devtools.build.lib.actions.Artifact;
import com.google.devtools.build.lib.analysis.ConfiguredTarget;
import com.google.devtools.build.lib.analysis.FileProvider;
import com.google.devtools.build.lib.analysis.TransitiveInfoProvider;
import com.google.devtools.build.lib.analysis.config.BuildConfiguration;
import com.google.devtools.build.lib.cmdline.Label;
import com.google.devtools.build.lib.collect.nestedset.NestedSetBuilder;
import com.google.devtools.build.lib.collect.nestedset.Order;
import com.google.devtools.build.lib.concurrent.ThreadSafety.Immutable;
import com.google.devtools.build.lib.events.Location;
import com.google.devtools.build.lib.packages.ClassObjectConstructor;
import com.google.devtools.build.lib.packages.SkylarkClassObject;
import com.google.devtools.build.lib.packages.Target;
import com.google.devtools.build.lib.syntax.ClassObject;
import com.google.devtools.build.lib.syntax.EvalException;
import com.google.devtools.build.lib.syntax.SkylarkNestedSet;
import com.google.devtools.build.lib.util.Preconditions;
import javax.annotation.Nullable;
/**
* This configured target pretends to be whatever type of target "actual" is, returning its
* transitive info providers and target, but returning its own label.
*
* <p>Transitive info providers can also be overridden.
*/
@Immutable
public final class AliasConfiguredTarget implements ConfiguredTarget, ClassObject {
private final BuildConfiguration configuration;
private final ConfiguredTarget actual;
private final ImmutableMap<Class<? extends TransitiveInfoProvider>, TransitiveInfoProvider>
overrides;
public AliasConfiguredTarget(
BuildConfiguration configuration,
@Nullable ConfiguredTarget actual,
ImmutableMap<Class<? extends TransitiveInfoProvider>, TransitiveInfoProvider> overrides) {
this.configuration = Preconditions.checkNotNull(configuration);
this.actual = actual;
this.overrides = Preconditions.checkNotNull(overrides);
}
@Override
public <P extends TransitiveInfoProvider> P getProvider(Class<P> provider) {
if (overrides.containsKey(provider)) {
return provider.cast(overrides.get(provider));
}
return actual == null ? null : actual.getProvider(provider);
}
@Override
public Label getLabel() {
return actual.getLabel();
}
@Override
public Object get(String providerKey) {
return actual == null ? null : actual.get(providerKey);
}
@Nullable
@Override
public SkylarkClassObject get(ClassObjectConstructor.Key providerKey) {
return actual == null ? null : actual.get(providerKey);
}
@Override
public Object getIndex(Object key, Location loc) throws EvalException {
return actual == null ? null : actual.getIndex(key, loc);
}
@Override
public boolean containsKey(Object key, Location loc) throws EvalException {
return actual != null && actual.containsKey(key, loc);
}
@Override
public Target getTarget() {
return actual == null ? null : actual.getTarget();
}
@Override
public BuildConfiguration getConfiguration() {
// This does not return actual.getConfiguration() because actual might be an input file, in
// which case its configuration is null and we don't want to have rules that have a null
// configuration.
return configuration;
}
/* ClassObject methods */
@Override
public Object getValue(String name) {
if (name.equals(LABEL_FIELD)) {
return getLabel();
} else if (name.equals(FILES_FIELD)) {
// A shortcut for files to build in Skylark. FileConfiguredTarget and RuleConfiguredTarget
// always has FileProvider and Error- and PackageGroupConfiguredTarget-s shouldn't be
// accessible in Skylark.
return SkylarkNestedSet.of(Artifact.class, actual == null
? NestedSetBuilder.<Artifact>emptySet(Order.STABLE_ORDER)
: getProvider(FileProvider.class).getFilesToBuild());
}
return actual == null ? null : actual.getValue(name);
}
@Override
public ImmutableCollection<String> getKeys() {
if (actual != null) {
return actual.getKeys();
}
return ImmutableList.of();
}
@Override
public String errorMessage(String name) {
// Use the default error message.
return null;
}
/**
* Returns a target this target aliases.
*/
@Nullable
public ConfiguredTarget getActual() {
return actual;
}
}
|
