84 lines
2.4 KiB
Python
84 lines
2.4 KiB
Python
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"""
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Copyright (C) 2021 The Android Open Source Project
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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"""
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load("//build/bazel/rules/cc:cc_constants.bzl", "constants")
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def extension(f):
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return f.split(".")[-1]
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def group_files_by_ext(files):
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cpp = []
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c = []
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asm = []
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# This for-loop iterator works because filegroups in Android don't use
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# configurable selects.
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for f in files:
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if extension(f) in constants.c_src_exts:
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c += [f]
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elif extension(f) in constants.cpp_src_exts:
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cpp += [f]
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elif extension(f) in constants.as_src_exts:
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asm += [f]
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else:
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# not C based
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continue
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return cpp, c, asm
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# Filegroup is a macro because it needs to expand to language specific source
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# files for cc_library's srcs_as, srcs_c and srcs attributes.
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def filegroup(name, srcs = [], **kwargs):
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native.filegroup(
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name = name,
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srcs = srcs,
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**kwargs
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)
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# These genrule prevent empty filegroups being used as deps to cc libraries,
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# avoiding the error:
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#
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# in srcs attribute of cc_library rule //foo/bar:baz:
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# '//foo/bar/some_other:baz2' does not produce any cc_library srcs files.
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native.genrule(
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name = name + "_null_cc",
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outs = [name + "_null.cc"],
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cmd = "touch $@",
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)
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native.genrule(
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name = name + "_null_c",
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outs = [name + "_null.c"],
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cmd = "touch $@",
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)
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native.genrule(
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name = name + "_null_s",
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outs = [name + "_null.S"],
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cmd = "touch $@",
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)
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cpp_srcs, c_srcs, as_srcs = group_files_by_ext(srcs)
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native.filegroup(
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name = name + "_cpp_srcs",
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srcs = [name + "_null.cc"] + cpp_srcs,
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)
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native.filegroup(
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name = name + "_c_srcs",
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srcs = [name + "_null.c"] + c_srcs,
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)
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native.filegroup(
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name = name + "_as_srcs",
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srcs = [name + "_null.S"] + as_srcs,
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)
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