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
|
// 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.rules.proto;
import static com.google.devtools.build.lib.packages.Attribute.attr;
import static com.google.devtools.build.lib.packages.BuildType.LABEL_LIST;
import com.google.devtools.build.lib.analysis.BaseRuleClasses;
import com.google.devtools.build.lib.analysis.RuleDefinition;
import com.google.devtools.build.lib.analysis.RuleDefinitionEnvironment;
import com.google.devtools.build.lib.packages.RuleClass;
import com.google.devtools.build.lib.packages.RuleClass.Builder;
import com.google.devtools.build.lib.util.FileType;
/**
* Rule definition for the proto_library rule.
*/
public final class BazelProtoLibraryRule implements RuleDefinition {
@Override
public RuleClass build(Builder builder, final RuleDefinitionEnvironment env) {
return builder
// This rule works, but does nothing, in open-source Bazel, due to the
// lack of protoc support. Users can theoretically write their own Skylark rules,
// but these are still 'experimental' according to the documentation.
.setUndocumented()
.setOutputToGenfiles()
/* <!-- #BLAZE_RULE(proto_library).ATTRIBUTE(deps) -->
The list of other <code>proto_library</code> rules that the target depends upon.
${SYNOPSIS}
A <code>proto_library</code> may only depend on other
<code>proto_library</code> targets.
It may not depend on language-specific libraries.
<!-- #END_BLAZE_RULE.ATTRIBUTE --> */
.override(attr("deps", LABEL_LIST)
.allowedRuleClasses("proto_library")
.allowedFileTypes())
/* <!-- #BLAZE_RULE(proto_library).ATTRIBUTE(srcs) -->
The list of <code>.proto</code> files that are processed to create the target.
${SYNOPSIS}
This is usually a non empty list. One usecase where <code>srcs</code> can be
empty is an <i>alias-library</i>. This is a proto_library rule having one or
more other proto_library in <code>deps</code>. This pattern can be used to
e.g. export a public api under a persistent name.
<!-- #END_BLAZE_RULE.ATTRIBUTE --> */
.add(attr("srcs", LABEL_LIST)
.direct_compile_time_input()
.allowedFileTypes(FileType.of(".proto")))
.advertiseProvider(ProtoSourcesProvider.class)
.build();
}
@Override
public Metadata getMetadata() {
return RuleDefinition.Metadata.builder()
.name("proto_library")
.ancestors(BaseRuleClasses.RuleBase.class)
.factoryClass(BazelProtoLibrary.class)
.build();
}
}
/*<!-- #BLAZE_RULE (NAME = proto_library, TYPE = LIBRARY, FAMILY = Protocol Buffer) -->
${ATTRIBUTE_SIGNATURE}
<p>Use <code>proto_library</code> to define libraries of protocol buffers
which may be used from multiple languages. A <code>proto_library</code> may be listed
in the <code>deps</code> clause of supported rules, such as <code>objc_proto_library</code>.
</p>
${ATTRIBUTE_DEFINITION}
<!-- #END_BLAZE_RULE -->*/
|
