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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 static com.google.devtools.build.lib.rules.objc.ObjcProvider.IMPORTED_LIBRARY;
import com.google.common.collect.ImmutableList;
import com.google.devtools.build.lib.actions.Artifact;
import com.google.devtools.build.lib.analysis.RuleConfiguredTarget.Mode;
import com.google.devtools.build.lib.analysis.RuleContext;
import com.google.devtools.build.lib.analysis.config.BuildConfiguration;
import com.google.devtools.build.lib.rules.apple.AppleConfiguration;
import com.google.devtools.build.lib.rules.apple.Platform;
import com.google.devtools.build.lib.rules.cpp.CcToolchainFeatures;
import com.google.devtools.build.lib.rules.cpp.CcToolchainFeatures.Variables.StringSequence;
import com.google.devtools.build.lib.rules.cpp.CcToolchainFeatures.Variables.VariablesExtension;
/** Build variable extensions for templating a toolchain for objc builds. */
class ObjcVariablesExtension implements VariablesExtension {
static final String PCH_FILE_VARIABLE_NAME = "pch_file";
static final String FRAMEWORKS_VARIABLE_NAME = "framework_paths";
static final String VERSION_MIN_VARIABLE_NAME = "version_min";
static final String MODULES_MAPS_DIR_NAME = "module_maps_dir";
static final String OBJC_MODULE_CACHE_DIR_NAME = "_objc_module_cache";
static final String OBJC_MODULE_CACHE_KEY = "modules_cache_path";
static final String OBJ_LIST_PATH_VARIABLE_NAME = "obj_list_path";
static final String ARCHIVE_PATH_VARIABLE_NAME = "archive_path";
static final String FULLY_LINKED_ARCHIVE_PATH_VARIABLE_NAME = "fully_linked_archive_path";
static final String OBJC_LIBRARY_EXEC_PATHS_VARIABLE_NAME = "objc_library_exec_paths";
static final String CC_LIBRARY_EXEC_PATHS_VARIABLE_NAME = "cc_library_exec_paths";
static final String IMPORTED_LIBRARY_EXEC_PATHS_VARIABLE_NAME = "imported_library_exec_paths";
private final RuleContext ruleContext;
private final ObjcProvider objcProvider;
private final CompilationArtifacts compilationArtifacts;
private final Artifact fullyLinkArchive;
private final IntermediateArtifacts intermediateArtifacts;
private final BuildConfiguration buildConfiguration;
private final AppleConfiguration appleConfiguration;
public ObjcVariablesExtension(
RuleContext ruleContext,
ObjcProvider objcProvider,
CompilationArtifacts compilationArtifacts,
Artifact fullyLinkArchive,
IntermediateArtifacts intermediateArtifacts,
BuildConfiguration buildConfiguration) {
this.ruleContext = ruleContext;
this.objcProvider = objcProvider;
this.compilationArtifacts = compilationArtifacts;
this.fullyLinkArchive = fullyLinkArchive;
this.intermediateArtifacts = intermediateArtifacts;
this.buildConfiguration = buildConfiguration;
this.appleConfiguration = buildConfiguration.getFragment(AppleConfiguration.class);
}
@Override
public void addVariables(CcToolchainFeatures.Variables.Builder builder) {
addPchVariables(builder);
addFrameworkVariables(builder);
addArchVariables(builder);
addModuleMapVariables(builder);
if (compilationArtifacts.getArchive().isPresent()) {
addArchiveVariables(builder);
}
addFullyLinkArchiveVariables(builder);
}
private void addPchVariables(CcToolchainFeatures.Variables.Builder builder) {
if (ruleContext.getPrerequisiteArtifact("pch", Mode.TARGET) != null) {
builder.addVariable(
PCH_FILE_VARIABLE_NAME,
ruleContext.getPrerequisiteArtifact("pch", Mode.TARGET).getExecPathString());
}
}
private void addFrameworkVariables(CcToolchainFeatures.Variables.Builder builder) {
StringSequence.Builder frameworkSequence = new StringSequence.Builder();
for (String framework :
CompilationSupport.commonFrameworkNames(objcProvider, appleConfiguration)) {
frameworkSequence.addValue(framework);
}
builder.addSequence(FRAMEWORKS_VARIABLE_NAME, frameworkSequence.build());
}
private void addModuleMapVariables(CcToolchainFeatures.Variables.Builder builder) {
builder.addVariable(
MODULES_MAPS_DIR_NAME,
intermediateArtifacts
.moduleMap()
.getArtifact()
.getExecPath()
.getParentDirectory()
.toString());
builder.addVariable(
OBJC_MODULE_CACHE_KEY,
buildConfiguration.getGenfilesFragment() + "/" + OBJC_MODULE_CACHE_DIR_NAME);
}
private void addArchVariables(CcToolchainFeatures.Variables.Builder builder) {
Platform platform = appleConfiguration.getSingleArchPlatform();
builder.addVariable(VERSION_MIN_VARIABLE_NAME,
appleConfiguration.getMinimumOsForPlatformType(platform.getType()).toString());
}
private void addArchiveVariables(CcToolchainFeatures.Variables.Builder builder) {
builder.addVariable(
OBJ_LIST_PATH_VARIABLE_NAME,
ObjcRuleClasses.intermediateArtifacts(ruleContext).archiveObjList().getExecPathString());
builder.addVariable(
ARCHIVE_PATH_VARIABLE_NAME, compilationArtifacts.getArchive().get().getExecPathString());
}
private void addFullyLinkArchiveVariables(CcToolchainFeatures.Variables.Builder builder) {
builder.addVariable(
FULLY_LINKED_ARCHIVE_PATH_VARIABLE_NAME, fullyLinkArchive.getExecPathString());
builder.addSequenceVariable(
OBJC_LIBRARY_EXEC_PATHS_VARIABLE_NAME,
ImmutableList.copyOf(Artifact.toExecPaths(objcProvider.getObjcLibraries())));
builder.addSequenceVariable(
CC_LIBRARY_EXEC_PATHS_VARIABLE_NAME,
ImmutableList.copyOf(Artifact.toExecPaths(objcProvider.getCcLibraries())));
builder.addSequenceVariable(
IMPORTED_LIBRARY_EXEC_PATHS_VARIABLE_NAME,
ImmutableList.copyOf(Artifact.toExecPaths(objcProvider.get(IMPORTED_LIBRARY))));
}
}
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