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// Copyright 2017 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.analysis;
import com.google.common.collect.ImmutableSet;
import com.google.devtools.build.lib.analysis.config.BuildConfiguration;
import com.google.devtools.build.lib.analysis.config.BuildOptions;
import com.google.devtools.build.lib.analysis.config.ConfigurationEnvironment;
import com.google.devtools.build.lib.analysis.config.ConfigurationFragmentFactory;
import com.google.devtools.build.lib.analysis.config.FragmentOptions;
import com.google.devtools.build.lib.analysis.config.InvalidConfigurationException;
import com.google.devtools.build.lib.analysis.config.PatchTransition;
import com.google.devtools.build.lib.packages.Target;
/**
* Grab bag file for test configuration fragments and fragment factories.
*/
public class TestConfigFragments {
/**
* A {@link PatchTransition} that appends a given value to {@link
* BuildConfiguration.Options#hostCpu}.
*/
private static class HostCpuTransition implements PatchTransition {
private final String patchMessage;
HostCpuTransition(String patchMessage) {
this.patchMessage = patchMessage;
}
@Override
public BuildOptions apply(BuildOptions options) {
BuildOptions toOptions = options.clone();
BuildConfiguration.Options coreOptions =
toOptions.get(BuildConfiguration.Options.class);
String prefix = coreOptions.hostCpu.startsWith("$") ? coreOptions.hostCpu : "";
coreOptions.hostCpu = prefix + "$" + patchMessage;
return toOptions;
}
}
/**
* A {@link ConfigurationFragmentFactory} that trivially returns a given fragment.
*/
private static class SimpleFragmentFactory implements ConfigurationFragmentFactory {
private final BuildConfiguration.Fragment fragment;
public SimpleFragmentFactory(BuildConfiguration.Fragment fragment) {
this.fragment = fragment;
}
@Override
public BuildConfiguration.Fragment create(ConfigurationEnvironment env,
BuildOptions buildOptions) throws InvalidConfigurationException {
return fragment;
}
@Override
public Class<? extends BuildConfiguration.Fragment> creates() {
return fragment.getClass();
}
@Override
public ImmutableSet<Class<? extends FragmentOptions>> requiredOptions() {
return ImmutableSet.<Class<? extends FragmentOptions>>of();
}
}
/** Factory for a test fragment with a top-level configuration hook. */
public static SimpleFragmentFactory FragmentWithTopLevelConfigHook1Factory =
new SimpleFragmentFactory(
new BuildConfiguration.Fragment() {
@Override
public PatchTransition topLevelConfigurationHook(Target toTarget) {
return new HostCpuTransition("CONFIG HOOK 1");
}
});
/** Factory for a test fragment with a top-level configuration hook. */
public static SimpleFragmentFactory FragmentWithTopLevelConfigHook2Factory =
// The anonymous class definition for the BuildConfiguration.Fragment needs to be different
// than the one of its peer above. This is because Bazel indexes configuration fragments
// by class name. So we need to make sure all fragment definitions retain distinct class
// names (i.e. "TestConfigFragments$1", "TestConfigFragments$2", etc).
new SimpleFragmentFactory(
new BuildConfiguration.Fragment() {
@Override
public PatchTransition topLevelConfigurationHook(Target toTarget) {
return new HostCpuTransition("CONFIG HOOK 2");
}
});
}
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