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// Copyright 2014 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.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.devtools.build.lib.analysis.MakeVariableExpander.ExpansionException;
import com.google.devtools.build.lib.analysis.config.BuildConfiguration;
import com.google.devtools.build.lib.packages.Package;
import com.google.devtools.build.lib.syntax.SkylarkDict;
import java.util.LinkedHashMap;
import java.util.Map;
/**
* Implements make variable expansion for make variables that depend on the
* configuration and the target (not on behavior of the
* {@link ConfiguredTarget} implementation)
*/
public class ConfigurationMakeVariableContext implements MakeVariableExpander.Context {
private final Package pkg;
private final ImmutableMap<String, String> ruleEnv;
private final ImmutableMap<String, String> commandLineEnv;
private final ImmutableMap<String, String> globalEnv;
private final String platform;
// TODO(b/37567440): Remove when Skylark callers can be updated to get this from
// CcToolchainProvider. We should use CcCommon.CC_TOOLCHAIN_ATTRIBUTE_NAME, but we didn't want to
// pollute core with C++ specific constant.
private static final ImmutableList<String> defaultMakeVariableAttributes =
ImmutableList.of(":cc_toolchain");
public ConfigurationMakeVariableContext(
RuleContext ruleContext, Package pkg, BuildConfiguration configuration) {
this(ruleContext.getMakeVariables(defaultMakeVariableAttributes), pkg, configuration);
}
public ConfigurationMakeVariableContext(
ImmutableMap<String, String> ruleMakeVariables,
Package pkg,
BuildConfiguration configuration) {
this.pkg = pkg;
this.ruleEnv = ruleMakeVariables;
this.commandLineEnv = ImmutableMap.copyOf(configuration.getCommandLineBuildVariables());
this.globalEnv = ImmutableMap.copyOf(configuration.getGlobalMakeEnvironment());
this.platform = configuration.getPlatformName();
}
@Override
public String lookupMakeVariable(String var) throws ExpansionException {
String value = ruleEnv.get(var);
if (value == null) {
value = commandLineEnv.get(var);
}
if (value == null) {
value = pkg.lookupMakeVariable(var, platform);
}
if (value == null) {
value = globalEnv.get(var);
}
if (value == null) {
throw new MakeVariableExpander.ExpansionException("$(" + var + ") not defined");
}
return value;
}
public SkylarkDict<String, String> collectMakeVariables() {
Map<String, String> map = new LinkedHashMap<>();
// Collect variables in the reverse order as in lookupMakeVariable
// because each update is overwriting.
map.putAll(pkg.getAllMakeVariables(platform));
map.putAll(globalEnv);
map.putAll(commandLineEnv);
map.putAll(ruleEnv);
return SkylarkDict.<String, String>copyOf(null, map);
}
}
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