在 Buck 中,人们可能会这样写:
exported_headers = subdir_glob([
("lib/source", "video/**/*.h"),
("lib/source", "audio/**/*.h"),
],
excludes = [
"lib/source/video/codecs/*.h",
],
prefix = "MediaLib/")
此行将使这些标头在 MediaLib/ 下可用。Bazel 中的等价物是什么?
我最终写了一个规则来做到这一点。它提供类似于文件组输出的东西,并且可以在宏中与 cc_library 结合使用。
def _impl_flat_hdr_dir(ctx):
path = ctx.attr.include_path
d = ctx.actions.declare_directory(path)
dests = [ctx.actions.declare_file(path + "/" + h.basename)
for h in ctx.files.hdrs]
cmd = """
mkdir -p {path};
cp {hdrs} {path}/.
""".format(path=d.path, hdrs=" ".join([h.path for h in ctx.files.hdrs]))
ctx.actions.run_shell(
command = cmd,
inputs = ctx.files.hdrs,
outputs = dests + [d],
progress_message = "doing stuff!!!"
)
return struct(
files = depset(dests)
)
flat_hdr_dir = rule(
_impl_flat_hdr_dir,
attrs = {
"hdrs": attr.label_list(allow_files = True),
"include_path": attr.string(mandatory = True),
},
output_to_genfiles = True,
)
因此,我没有对其进行测试,但来自文档,它应该类似于:
cc_library(
name = "foo",
srcs = glob([
"video/**/*.h",
"audio/**/*.h",
],
excludes = [ "lib/source/video/codecs/*.h" ]
),
include_prefix = "MediaLib/"
)
https://docs.bazel.build/versions/master/be/c-cpp.html#cc_library.include_prefix https://docs.bazel.build/versions/master/be/functions.html#glob