| // 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.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.packages.BuildType; |
| import com.google.devtools.build.lib.util.FileType; |
| |
| /** |
| * A helper class that filters a given list of source files into different buckets - shared |
| * libraries, static libraries, pic object files, and non-pic object files. |
| */ |
| public final class PrecompiledFiles { |
| /** The Artifacts from srcs. */ |
| private final ImmutableList<Artifact> files; |
| |
| /** |
| * Initializes this object with the artifacts obtained from the "srcs" attribute of the given rule |
| * (this is the most common usage for this class). |
| */ |
| public PrecompiledFiles(RuleContext ruleContext) { |
| if (ruleContext.attributes().has("srcs", BuildType.LABEL_LIST)) { |
| this.files = ruleContext.getPrerequisiteArtifacts("srcs").list(); |
| } else { |
| this.files = ImmutableList.<Artifact>of(); |
| } |
| } |
| |
| public Iterable<Artifact> getLibraries() { |
| return FileType.filter(files, CppFileTypes.ARCHIVE, CppFileTypes.PIC_ARCHIVE, |
| CppFileTypes.ALWAYS_LINK_LIBRARY, CppFileTypes.ALWAYS_LINK_PIC_LIBRARY, |
| CppFileTypes.SHARED_LIBRARY, |
| CppFileTypes.VERSIONED_SHARED_LIBRARY); |
| } |
| |
| public Iterable<Artifact> getSharedLibraries() { |
| return getSharedLibrariesFrom(files); |
| } |
| |
| static Iterable<Artifact> getSharedLibrariesFrom(Iterable<Artifact> collection) { |
| return FileType.filter(collection, CppFileTypes.SHARED_LIBRARY, |
| CppFileTypes.VERSIONED_SHARED_LIBRARY); |
| } |
| |
| public Iterable<Artifact> getStaticLibraries() { |
| return FileType.filter(files, CppFileTypes.ARCHIVE); |
| } |
| |
| public Iterable<Artifact> getAlwayslinkStaticLibraries() { |
| return FileType.filter(files, CppFileTypes.ALWAYS_LINK_LIBRARY); |
| } |
| |
| public Iterable<Artifact> getPicStaticLibraries() { |
| return FileType.filter(files, CppFileTypes.PIC_ARCHIVE); |
| } |
| |
| public Iterable<Artifact> getPicAlwayslinkLibraries() { |
| return FileType.filter(files, CppFileTypes.ALWAYS_LINK_PIC_LIBRARY); |
| } |
| |
| public Iterable<Artifact> getObjectFiles(final boolean usePic) { |
| if (usePic) { |
| return Iterables.filter( |
| files, |
| artifact -> { |
| String filename = artifact.getExecPathString(); |
| |
| // For compatibility with existing BUILD files, any ".o" files listed |
| // in srcs are assumed to be position-independent code, or |
| // at least suitable for inclusion in shared libraries, unless they |
| // end with ".nopic.o". (The ".nopic.o" extension is an undocumented |
| // feature to give users at least some control over this.) Note that |
| // some target platforms do not require shared library code to be PIC. |
| return CppFileTypes.PIC_OBJECT_FILE.matches(filename) |
| || (CppFileTypes.OBJECT_FILE.matches(filename) && !filename.endsWith(".nopic.o")); |
| }); |
| } else { |
| return FileType.filter(files, CppFileTypes.OBJECT_FILE); |
| } |
| } |
| } |
| |