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// Copyright 2015 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.cpp;
import com.google.common.collect.ImmutableList;
import com.google.devtools.build.lib.actions.Artifact;
import com.google.devtools.build.lib.collect.nestedset.NestedSet;
import com.google.devtools.build.lib.collect.nestedset.NestedSetBuilder;
import com.google.devtools.build.lib.rules.SkylarkApiProvider;
import com.google.devtools.build.lib.skylarkinterface.SkylarkCallable;
import com.google.devtools.build.lib.skylarkinterface.SkylarkModule;
import com.google.devtools.build.lib.vfs.PathFragment;
/**
* A class that exposes the C++ providers to Skylark. It is intended to provide a
* simple and stable interface for Skylark users.
*/
@SkylarkModule(
name = "CcSkylarkApiProvider", doc = "Provides access to information about C++ rules. "
+ "Every C++-related target provides this struct, accessible as a 'cc' field on "
+ "a Target struct.")
public final class CcSkylarkApiProvider extends SkylarkApiProvider {
/** The name of the field in Skylark used to access this class. */
public static final String NAME = "cc";
@SkylarkCallable(
name = "transitive_headers",
structField = true,
doc =
"Returns the immutable set of headers that have been declared in the <code>src</code> "
+ "or <code>headers</code> attribute (possibly empty but never None).")
public NestedSet<Artifact> getTransitiveHeaders() {
CppCompilationContext ccContext = getInfo().getProvider(CppCompilationContext.class);
return ccContext.getDeclaredIncludeSrcs();
}
@SkylarkCallable(
name = "libs",
structField = true,
doc =
"Returns the immutable set of libraries for either "
+ "FULLY STATIC mode (linkopts=[\"-static\"]) or MOSTLY STATIC mode (linkstatic=1) "
+ "(possibly empty but never None)")
public NestedSet<Artifact> getLibraries() {
NestedSetBuilder<Artifact> libs = NestedSetBuilder.linkOrder();
CcLinkParamsProvider ccLinkParams = getInfo().getProvider(CcLinkParamsProvider.class);
if (ccLinkParams == null) {
return libs.build();
}
for (LinkerInput lib : ccLinkParams.getCcLinkParams(true, false).getLibraries()) {
libs.add(lib.getArtifact());
}
return libs.build();
}
@SkylarkCallable(
name = "link_flags",
structField = true,
doc =
"Returns the immutable list of flags given to the C++ linker command for either "
+ "FULLY STATIC mode (linkopts=[\"-static\"]) or MOSTLY STATIC mode (linkstatic=1) "
+ "(possibly empty but never None)")
public ImmutableList<String> getLinkopts() {
CcLinkParamsProvider ccLinkParams = getInfo().getProvider(CcLinkParamsProvider.class);
if (ccLinkParams == null) {
return ImmutableList.of();
}
return ccLinkParams.getCcLinkParams(true, false).flattenedLinkopts();
}
@SkylarkCallable(
name = "compile_flags",
structField = true,
doc =
"Returns the immutable set of flags used to compile this target "
+ "(possibly empty but never None).")
public ImmutableList<String> getCcFlags() {
CppCompilationContext ccContext = getInfo().getProvider(CppCompilationContext.class);
ImmutableList.Builder<String> options = ImmutableList.builder();
for (String define : ccContext.getDefines()) {
options.add("-D" + define);
}
for (PathFragment path : ccContext.getSystemIncludeDirs()) {
options.add("-isystem " + path.getSafePathString());
}
for (PathFragment path : ccContext.getIncludeDirs()) {
options.add("-I " + path.getSafePathString());
}
for (PathFragment path : ccContext.getQuoteIncludeDirs()) {
options.add("-iquote " + path.getSafePathString());
}
return options.build();
}
}
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