# Copyright 2023 The MediaPipe Authors.
#
# 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.
"""MediaPipe Task Library Helper Rules for iOS"""
MPP_TASK_MINIMUM_OS_VERSION = "12.0"
# When the static framework is built with bazel, the all header files are moved
# to the "Headers" directory with no header path prefixes. This auxiliary rule
# is used for stripping the path prefix to the C/iOS API header files included by
# other C/iOS API header files.
# In case of C header files, includes start with a keyword of "#include'.
# Imports in iOS header files start with a keyword of '#import'.
def strip_api_include_path_prefix(name, hdr_labels, prefix = ""):
"""Create modified header files with the import path stripped out.
Args:
name: The name to be used as a prefix to the generated genrules.
hdr_labels: List of header labels to strip out the include path. Each
label must end with a colon followed by the header file name.
prefix: Optional prefix path to prepend to the header inclusion path.
"""
for hdr_label in hdr_labels:
hdr_filename = hdr_label.split(":")[-1]
# The last path component of iOS header files is sources/some_file.h
# Hence it wiill contain a '/'. So the string can be split at '/' to get
# the header file name.
if "/" in hdr_filename:
hdr_filename = hdr_filename.split("/")[-1]
hdr_basename = hdr_filename.split(".")[0]
native.genrule(
name = "{}_{}".format(name, hdr_basename),
srcs = [hdr_label],
outs = [hdr_filename],
cmd = """
sed 's|#\\([a-z]*\\) ".*/\\([^/]\\{{1,\\}}\\.h\\)"|#\\1 "{}\\2"|'\
"$(location {})"\
> "$@"
""".format(prefix, hdr_label),
)
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