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+# Copyright 2018 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.
+"""Constants for action names used for C++ rules."""
+
+# Name for the C compilation action.
+C_COMPILE_ACTION_NAME = "c-compile"
+
+# Name of the C++ compilation action.
+CPP_COMPILE_ACTION_NAME = "c++-compile"
+
+# Name of the linkstamp-compile action.
+LINKSTAMP_COMPILE_ACTION_NAME = "linkstamp-compile"
+
+# Name of the action used to compute CC_FLAGS make variable.
+CC_FLAGS_MAKE_VARIABLE_ACTION_NAME = "cc-flags-make-variable"
+
+# Name of the C++ module codegen action.
+CPP_MODULE_CODEGEN_ACTION_NAME = "c++-module-codegen"
+
+# Name of the C++ header parsing action.
+CPP_HEADER_PARSING_ACTION_NAME = "c++-header-parsing"
+
+# Name of the C++ module compile action.
+CPP_MODULE_COMPILE_ACTION_NAME = "c++-module-compile"
+
+# Name of the assembler action.
+ASSEMBLE_ACTION_NAME = "assemble"
+
+# Name of the assembly preprocessing action.
+PREPROCESS_ASSEMBLE_ACTION_NAME = "preprocess-assemble"
+
+# Name of the action producing ThinLto index.
+LTO_INDEXING_ACTION_NAME = "lto-indexing"
+
+# Name of the action producing ThinLto index for executable.
+LTO_INDEX_FOR_EXECUTABLE_ACTION_NAME = "lto-index-for-executable"
+
+# Name of the action producing ThinLto index for dynamic library.
+LTO_INDEX_FOR_DYNAMIC_LIBRARY_ACTION_NAME = "lto-index-for-dynamic-library"
+
+# Name of the action producing ThinLto index for nodeps dynamic library.
+LTO_INDEX_FOR_NODEPS_DYNAMIC_LIBRARY_ACTION_NAME = "lto-index-for-nodeps-dynamic-library"
+
+# Name of the action compiling lto bitcodes into native objects.
+LTO_BACKEND_ACTION_NAME = "lto-backend"
+
+# Name of the link action producing executable binary.
+CPP_LINK_EXECUTABLE_ACTION_NAME = "c++-link-executable"
+
+# Name of the link action producing dynamic library.
+CPP_LINK_DYNAMIC_LIBRARY_ACTION_NAME = "c++-link-dynamic-library"
+
+# Name of the link action producing dynamic library that doesn't include it's
+# transitive dependencies.
+CPP_LINK_NODEPS_DYNAMIC_LIBRARY_ACTION_NAME = "c++-link-nodeps-dynamic-library"
+
+# Name of the archiving action producing static library.
+CPP_LINK_STATIC_LIBRARY_ACTION_NAME = "c++-link-static-library"
+
+# Name of the action stripping the binary.
+STRIP_ACTION_NAME = "strip"
+
+# A string constant for the objc compilation action.
+OBJC_COMPILE_ACTION_NAME = "objc-compile"
+
+# A string constant for the objc++ compile action.
+OBJCPP_COMPILE_ACTION_NAME = "objc++-compile"
+
+# A string constant for the objc executable link action.
+OBJC_EXECUTABLE_ACTION_NAME = "objc-executable"
+
+# A string constant for the objc fully-link link action.
+OBJC_FULLY_LINK_ACTION_NAME = "objc-fully-link"
+
+# A string constant for the clif action.
+CLIF_MATCH_ACTION_NAME = "clif-match"
+
+ACTION_NAMES = struct(
+    c_compile = C_COMPILE_ACTION_NAME,
+    cpp_compile = CPP_COMPILE_ACTION_NAME,
+    linkstamp_compile = LINKSTAMP_COMPILE_ACTION_NAME,
+    cc_flags_make_variable = CC_FLAGS_MAKE_VARIABLE_ACTION_NAME,
+    cpp_module_codegen = CPP_MODULE_CODEGEN_ACTION_NAME,
+    cpp_header_parsing = CPP_HEADER_PARSING_ACTION_NAME,
+    cpp_module_compile = CPP_MODULE_COMPILE_ACTION_NAME,
+    assemble = ASSEMBLE_ACTION_NAME,
+    preprocess_assemble = PREPROCESS_ASSEMBLE_ACTION_NAME,
+    lto_indexing = LTO_INDEXING_ACTION_NAME,
+    lto_backend = LTO_BACKEND_ACTION_NAME,
+    lto_index_for_executable = LTO_INDEX_FOR_EXECUTABLE_ACTION_NAME,
+    lto_index_for_dynamic_library = LTO_INDEX_FOR_DYNAMIC_LIBRARY_ACTION_NAME,
+    lto_index_for_nodeps_dynamic_library = LTO_INDEX_FOR_NODEPS_DYNAMIC_LIBRARY_ACTION_NAME,
+    cpp_link_executable = CPP_LINK_EXECUTABLE_ACTION_NAME,
+    cpp_link_dynamic_library = CPP_LINK_DYNAMIC_LIBRARY_ACTION_NAME,
+    cpp_link_nodeps_dynamic_library = CPP_LINK_NODEPS_DYNAMIC_LIBRARY_ACTION_NAME,
+    cpp_link_static_library = CPP_LINK_STATIC_LIBRARY_ACTION_NAME,
+    strip = STRIP_ACTION_NAME,
+    objc_compile = OBJC_COMPILE_ACTION_NAME,
+    objc_executable = OBJC_EXECUTABLE_ACTION_NAME,
+    objc_fully_link = OBJC_FULLY_LINK_ACTION_NAME,
+    objcpp_compile = OBJCPP_COMPILE_ACTION_NAME,
+    clif_match = CLIF_MATCH_ACTION_NAME,
+)
+
+# Names of actions that parse or compile C++ code.
+ALL_CPP_COMPILE_ACTION_NAMES = [
+    ACTION_NAMES.linkstamp_compile,
+    ACTION_NAMES.cpp_compile,
+    ACTION_NAMES.cpp_header_parsing,
+    ACTION_NAMES.cpp_module_compile,
+    ACTION_NAMES.cpp_module_codegen,
+    ACTION_NAMES.lto_backend,
+    ACTION_NAMES.clif_match,
+]
+
+# Names of actions that parse or compile C, C++ and assembly code.
+ALL_CC_COMPILE_ACTION_NAMES = ALL_CPP_COMPILE_ACTION_NAMES + [
+    ACTION_NAMES.c_compile,
+    ACTION_NAMES.preprocess_assemble,
+    ACTION_NAMES.assemble,
+]
+
+# Names of actions that link C, C++ and assembly code.
+ALL_CC_LINK_ACTION_NAMES = [
+    ACTION_NAMES.cpp_link_executable,
+    ACTION_NAMES.cpp_link_dynamic_library,
+    ACTION_NAMES.cpp_link_nodeps_dynamic_library,
+    ACTION_NAMES.lto_index_for_executable,
+    ACTION_NAMES.lto_index_for_dynamic_library,
+    ACTION_NAMES.lto_index_for_nodeps_dynamic_library,
+]
+
+# Names of actions that link entire programs.
+CC_LINK_EXECUTABLE_ACTION_NAMES = [
+    ACTION_NAMES.cpp_link_executable,
+    ACTION_NAMES.lto_index_for_executable,
+]
+
+# Names of actions that link dynamic libraries.
+DYNAMIC_LIBRARY_LINK_ACTION_NAMES = [
+    ACTION_NAMES.cpp_link_dynamic_library,
+    ACTION_NAMES.cpp_link_nodeps_dynamic_library,
+    ACTION_NAMES.lto_index_for_dynamic_library,
+    ACTION_NAMES.lto_index_for_nodeps_dynamic_library,
+]
+
+# Names of actions that link nodeps dynamic libraries.
+NODEPS_DYNAMIC_LIBRARY_LINK_ACTION_NAMES = [
+    ACTION_NAMES.cpp_link_nodeps_dynamic_library,
+    ACTION_NAMES.lto_index_for_nodeps_dynamic_library,
+]
+
+# Names of actions that link transitive dependencies.
+TRANSITIVE_LINK_ACTION_NAMES = [
+    ACTION_NAMES.cpp_link_executable,
+    ACTION_NAMES.cpp_link_dynamic_library,
+    ACTION_NAMES.lto_index_for_executable,
+    ACTION_NAMES.lto_index_for_dynamic_library,
+]
+
+ACTION_NAME_GROUPS = struct(
+    all_cc_compile_actions = ALL_CC_COMPILE_ACTION_NAMES,
+    all_cc_link_actions = ALL_CC_LINK_ACTION_NAMES,
+    all_cpp_compile_actions = ALL_CPP_COMPILE_ACTION_NAMES,
+    cc_link_executable_actions = CC_LINK_EXECUTABLE_ACTION_NAMES,
+    dynamic_library_link_actions = DYNAMIC_LIBRARY_LINK_ACTION_NAMES,
+    nodeps_dynamic_library_link_actions = NODEPS_DYNAMIC_LIBRARY_LINK_ACTION_NAMES,
+    transitive_link_actions = TRANSITIVE_LINK_ACTION_NAMES,
+)