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// 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.bazel.rules.objc;
import static com.google.devtools.build.lib.packages.ImplicitOutputsFunction.fromTemplates;
import com.google.devtools.build.lib.analysis.RuleDefinition;
import com.google.devtools.build.lib.analysis.RuleDefinitionEnvironment;
import com.google.devtools.build.lib.analysis.config.transitions.ComposingTransitionFactory;
import com.google.devtools.build.lib.analysis.config.transitions.TransitionFactory;
import com.google.devtools.build.lib.packages.ImplicitOutputsFunction;
import com.google.devtools.build.lib.packages.ImplicitOutputsFunction.SafeImplicitOutputsFunction;
import com.google.devtools.build.lib.packages.RuleClass;
import com.google.devtools.build.lib.packages.RuleTransitionData;
import com.google.devtools.build.lib.rules.config.ConfigFeatureFlagTransitionFactory;
import com.google.devtools.build.lib.rules.objc.AppleCrosstoolTransition;
import com.google.devtools.build.lib.rules.objc.AppleStaticLibraryBaseRule;
/** Rule definition for apple_static_library. */
public class BazelAppleStaticLibraryRule implements RuleDefinition {
/**
* Template for the fat archive output (using Apple's "lipo" tool to combine .a archive files of
* multiple architectures).
*/
static final SafeImplicitOutputsFunction LIPO_ARCHIVE = fromTemplates("%{name}_lipo.a");
@Override
public RuleClass build(RuleClass.Builder builder, RuleDefinitionEnvironment env) {
return builder
/*<!-- #BLAZE_RULE(apple_static_library).IMPLICIT_OUTPUTS -->
<ul>
<li><code><var>name</var>_lipo.a</code>: a 'lipo'ed archive file. All transitive
dependencies and <code>srcs</code> are linked, minus all transitive dependencies
specified in <code>avoid_deps</code>.</li>
</ul>
<!-- #END_BLAZE_RULE.IMPLICIT_OUTPUTS -->*/
.setImplicitOutputsFunction(ImplicitOutputsFunction.fromFunctions(LIPO_ARCHIVE))
.cfg(
ComposingTransitionFactory.of(
(TransitionFactory<RuleTransitionData>)
(unused) -> AppleCrosstoolTransition.APPLE_CROSSTOOL_TRANSITION,
new ConfigFeatureFlagTransitionFactory("feature_flags")))
.build();
}
@Override
public Metadata getMetadata() {
return RuleDefinition.Metadata.builder()
.name("apple_static_library")
.factoryClass(BazelAppleStaticLibrary.class)
.ancestors(AppleStaticLibraryBaseRule.class)
.build();
}
}
/*<!-- #BLAZE_RULE (NAME = apple_static_library, TYPE = BINARY, FAMILY = Objective-C) -->
<p>This rule produces single- or multi-architecture ("fat") Objective-C statically-linked libraries,
typically used in creating static Apple Frameworks for distribution and re-use in
multiple extensions or applications.</p>
<p>The <code>lipo</code> tool is used to combine files of multiple architectures; a build flag
controls which architectures are targeted. The build flag examined depends on the
<code>platform_type</code> attribute for this rule (and is described in its documentation).</p>
${IMPLICIT_OUTPUTS}
<!-- #END_BLAZE_RULE -->*/