kythe.io@v0.0.68-0.20240422202219-7225dbc01741/tools/build_rules/extra_aspects/cxx/rules.bzl (about)

     1  # Copyright 2023 The Kythe Authors. All rights reserved.
     2  #
     3  # Licensed under the Apache License, Version 2.0 (the "License");
     4  # you may not use this file except in compliance with the License.
     5  # You may obtain a copy of the License at
     6  #
     7  #   http://www.apache.org/licenses/LICENSE-2.0
     8  #
     9  # Unless required by applicable law or agreed to in writing, software
    10  # distributed under the License is distributed on an "AS IS" BASIS,
    11  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  # See the License for the specific language governing permissions and
    13  # limitations under the License.
    14  
    15  """C++ extraction rules."""
    16  
    17  load(":aspect.bzl", "KytheCxxCompilationInfo", "extract_cxx_aspect")
    18  
    19  _EXTRACTION_SETTINGS = {
    20      # We don't want and can't use module maps for extraction/indexing.
    21      "//command_line_option:features": ["-use_module_maps", "-module_maps"],
    22  }
    23  
    24  def _cc_extract_kzip_impl(ctx):
    25      return [
    26          DefaultInfo(files = depset(transitive = [
    27              d[KytheCxxCompilationInfo].kzips
    28              for d in ctx.attr.deps
    29              if KytheCxxCompilationInfo in d and d[KytheCxxCompilationInfo].kzips
    30          ])),
    31      ]
    32  
    33  def _transition_impl(settings, attr):
    34      if not attr.disable_modules:
    35          return None
    36      return _EXTRACTION_SETTINGS
    37  
    38  _transition = transition(
    39      implementation = _transition_impl,
    40      inputs = [],
    41      outputs = _EXTRACTION_SETTINGS.keys(),
    42  )
    43  
    44  cc_extract_kzip = rule(
    45      implementation = _cc_extract_kzip_impl,
    46      attrs = {
    47          "deps": attr.label_list(
    48              mandatory = True,
    49              aspects = [extract_cxx_aspect],
    50          ),
    51          "disable_modules": attr.bool(
    52              default = True,
    53          ),
    54          "_allowlist_function_transition": attr.label(
    55              default = "@bazel_tools//tools/allowlists/function_transition_allowlist",
    56          ),
    57      },
    58      cfg = _transition,
    59  )