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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.rules.objc;
import com.google.common.collect.Iterables;
import com.google.devtools.build.lib.actions.Artifact;
import com.google.devtools.build.lib.analysis.RuleContext;
import com.google.devtools.build.lib.analysis.actions.CustomCommandLine;
import com.google.devtools.build.lib.analysis.actions.SymlinkAction;
import com.google.devtools.build.lib.collect.nestedset.NestedSet;
import com.google.devtools.build.lib.rules.apple.AppleConfiguration;
import com.google.devtools.build.lib.rules.apple.ApplePlatform;
/**
* Support for registering actions using the Apple tool "lipo", which combines artifacts of
* different architectures to make multi-architecture artifacts.
*/
public class LipoSupport {
private final RuleContext ruleContext;
public LipoSupport(RuleContext ruleContext) {
this.ruleContext = ruleContext;
}
/**
* Registers an action to invoke "lipo" on all artifacts in {@code inputBinaries} to create the
* {@code outputBinary} multi-architecture artifact, built for platform {@code platform}.
*
* <p>If there is only one input binary given, since "lipo" is an expensive action, this will only
* symlink the output location to the input binary.
*
* @return this object
*/
public LipoSupport registerCombineArchitecturesAction(
NestedSet<Artifact> inputBinaries, Artifact outputBinary, ApplePlatform platform) {
if (inputBinaries.toList().size() > 1) {
ruleContext.registerAction(
ObjcRuleClasses.spawnAppleEnvActionBuilder(
ruleContext.getFragment(AppleConfiguration.class), platform)
.setMnemonic("ObjcCombiningArchitectures")
.addTransitiveInputs(inputBinaries)
.addOutput(outputBinary)
.setExecutable(CompilationSupport.xcrunwrapper(ruleContext))
.setCommandLine(
CustomCommandLine.builder()
.add(ObjcRuleClasses.LIPO)
.addExecPaths("-create", inputBinaries)
.addExecPath("-o", outputBinary)
.build())
.build(ruleContext));
} else {
ruleContext.registerAction(new SymlinkAction(
ruleContext.getActionOwner(),
Iterables.getOnlyElement(inputBinaries),
outputBinary,
"Symlinking single-architecture binary"));
}
return this;
}
}
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