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# Copyright (C) 2022 The Android Open Source Project
#
# 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.
"""Upon `bazel run`, updates a source file."""
load("//build/kernel/kleaf/impl:hermetic_toolchain.bzl", "hermetic_toolchain")
def _update_source_file_impl(ctx):
# --copy-links because src is a symlink inside the sandbox. We need to copy
# the referent.
# --no-perms because generated files usually have exec bit set, which
# we don't want in source files.
hermetic_tools = hermetic_toolchain.get(ctx)
script = hermetic_tools.run_setup + """
rsync --copy-links --no-perms --times {src} $(readlink -m {dst})
""".format(
src = ctx.file.src.short_path,
dst = ctx.file.dst.short_path,
)
ctx.actions.write(
content = script,
output = ctx.outputs.executable,
is_executable = True,
)
runfiles = [
ctx.file.src,
ctx.file.dst,
]
return [DefaultInfo(runfiles = ctx.runfiles(files = runfiles, transitive_files = hermetic_tools.deps))]
update_source_file = rule(
implementation = _update_source_file_impl,
attrs = {
"src": attr.label(allow_single_file = True),
"dst": attr.label(allow_single_file = True),
},
executable = True,
toolchains = [hermetic_toolchain.type],
)
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