| # Copyright 2020 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. |
| |
| """objc_library Starlark implementation replacing native""" |
| |
| load("@_builtins//:common/objc/semantics.bzl", "semantics") |
| load("@_builtins//:common/objc/compilation_support.bzl", "compilation_support") |
| load("@_builtins//:common/objc/attrs.bzl", "common_attrs") |
| load("@_builtins//:common/objc/transitions.bzl", "apple_crosstool_transition") |
| load("@_builtins//:common/cc/cc_helper.bzl", "cc_helper") |
| |
| objc_internal = _builtins.internal.objc_internal |
| CcInfo = _builtins.toplevel.CcInfo |
| cc_common = _builtins.toplevel.cc_common |
| coverage_common = _builtins.toplevel.coverage_common |
| apple_common = _builtins.toplevel.apple_common |
| |
| def _rule_error(msg): |
| fail(msg) |
| |
| def _attribute_error(attr_name, msg): |
| fail("in attribute '" + attr_name + "': " + msg) |
| |
| def _validate_attributes(ctx): |
| if ctx.label.name.find("/") != -1: |
| _attribute_error("name", "this attribute has unsupported character '/'") |
| |
| def _build_linking_context(ctx, feature_configuration, cc_toolchain, objc_provider, common_variables): |
| libraries = [] |
| if common_variables.compilation_artifacts.archive != None: |
| library_to_link = _static_library(ctx, feature_configuration, cc_toolchain, common_variables.compilation_artifacts.archive) |
| libraries.append(library_to_link) |
| |
| archives_from_objc_library = {} |
| for library in objc_provider.library.to_list(): |
| archives_from_objc_library[library.path] = library |
| |
| objc_libraries_cc_infos = [] |
| for dep in ctx.attr.deps: |
| if apple_common.Objc in dep and CcInfo in dep: |
| objc_libraries_cc_infos.append(dep[CcInfo]) |
| |
| merged_objc_library_cc_infos = cc_common.merge_cc_infos(cc_infos = objc_libraries_cc_infos) |
| |
| for linker_input in merged_objc_library_cc_infos.linking_context.linker_inputs.to_list(): |
| for lib in linker_input.libraries: |
| path = None |
| if lib.static_library != None: |
| path = lib.static_library.path |
| elif lib.pic_static_library != None: |
| path = lib.pic_static_library.path |
| if path in archives_from_objc_library and archives_from_objc_library[path]: |
| libraries.append(lib) |
| archives_from_objc_library[path] = None |
| |
| for archive in archives_from_objc_library.values(): |
| if archive: |
| library_to_link = _static_library(ctx, feature_configuration, cc_toolchain, archive) |
| libraries.append(library_to_link) |
| |
| libraries.extend(objc_provider.cc_library.to_list()) |
| |
| sdk_frameworks = objc_provider.sdk_framework.to_list() |
| user_link_flags = [] |
| for sdk_framework in sdk_frameworks: |
| user_link_flags.append(["-framework", sdk_framework]) |
| |
| direct_linker_inputs = [] |
| if len(user_link_flags) != 0 or len(libraries) != 0 or objc_provider.linkstamp: |
| linker_input = cc_common.create_linker_input( |
| owner = ctx.label, |
| libraries = depset(libraries), |
| user_link_flags = user_link_flags, |
| linkstamps = objc_provider.linkstamp, |
| ) |
| direct_linker_inputs.append(linker_input) |
| |
| return cc_common.create_linking_context( |
| linker_inputs = depset(direct = direct_linker_inputs, order = "topological"), |
| ) |
| |
| def _static_library( |
| ctx, |
| feature_configuration, |
| cc_toolchain, |
| library): |
| alwayslink = False |
| if library.extension == "lo": |
| alwayslink = True |
| return cc_common.create_library_to_link( |
| actions = ctx.actions, |
| feature_configuration = feature_configuration, |
| cc_toolchain = cc_toolchain, |
| static_library = library, |
| alwayslink = alwayslink, |
| ) |
| |
| def _objc_library_impl(ctx): |
| _validate_attributes(ctx) |
| |
| cc_toolchain = cc_helper.find_cpp_toolchain(ctx) |
| |
| common_variables = compilation_support.build_common_variables( |
| ctx = ctx, |
| toolchain = cc_toolchain, |
| use_pch = True, |
| deps = ctx.attr.deps, |
| runtime_deps = ctx.attr.runtime_deps, |
| linkopts = ctx.attr.linkopts, |
| alwayslink = ctx.attr.alwayslink, |
| ) |
| files = [] |
| if common_variables.compilation_artifacts.archive != None: |
| files.append(common_variables.compilation_artifacts.archive) |
| |
| (cc_compilation_context, compilation_outputs, output_groups) = compilation_support.register_compile_and_archive_actions( |
| common_variables, |
| ) |
| |
| compilation_support.validate_attributes(common_variables) |
| |
| j2objc_providers = objc_internal.j2objc_providers_from_deps(ctx = ctx) |
| |
| objc_provider = common_variables.objc_provider |
| feature_configuration = compilation_support.build_feature_configuration(common_variables, False, True) |
| linking_context = _build_linking_context(ctx, feature_configuration, cc_toolchain, objc_provider, common_variables) |
| cc_info = CcInfo( |
| compilation_context = cc_compilation_context, |
| linking_context = linking_context, |
| ) |
| |
| return [ |
| DefaultInfo(files = depset(files), data_runfiles = ctx.runfiles(files = files)), |
| cc_info, |
| objc_provider, |
| j2objc_providers[0], |
| j2objc_providers[1], |
| objc_internal.instrumented_files_info(ctx = ctx, object_files = compilation_outputs.objects), |
| OutputGroupInfo(**output_groups), |
| ] |
| |
| objc_library = rule( |
| implementation = _objc_library_impl, |
| attrs = common_attrs.union( |
| { |
| "data": attr.label_list(allow_files = True), |
| "_cc_toolchain": attr.label( |
| default = "@" + semantics.get_repo() + "//tools/cpp:current_cc_toolchain", |
| ), |
| }, |
| common_attrs.LICENSES, |
| common_attrs.COMPILING_RULE, |
| common_attrs.COMPILE_DEPENDENCY_RULE, |
| common_attrs.INCLUDE_SCANNING_RULE, |
| common_attrs.SDK_FRAMEWORK_DEPENDER_RULE, |
| common_attrs.COPTS_RULE, |
| common_attrs.XCRUN_RULE, |
| ), |
| fragments = ["objc", "apple", "cpp"], |
| cfg = apple_crosstool_transition, |
| toolchains = ["@" + semantics.get_repo() + "//tools/cpp:toolchain_type"], |
| incompatible_use_toolchain_transition = True, |
| ) |
