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#!/usr/bin/env python3
#
# Copyright (C) 2020 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.
#
import argparse
import collections
import os
import pathlib
import sys
class RustModule:
def __init__(self):
self.files = []
self.nested = collections.defaultdict(RustModule)
def emit(self, output_file, indent=""):
for (input_name, input_path) in self.files:
output_file.write(indent)
output_file.write("pub mod %s {\n" % input_name)
# Copy the contents of the input file into the output
with open(input_path, "r") as input_file:
for l in input_file:
output_file.write(indent)
output_file.write(" ")
output_file.write(l)
output_file.write(indent)
output_file.write("}\n")
for name, mod in self.nested.items():
output_file.write(indent)
output_file.write("pub mod %s {\n" % name)
mod.emit(output_file, indent + " ")
output_file.write(indent)
output_file.write("}\n")
def emit_mangled(self, output_file, indent="", prefix=""):
for (input_name, _) in self.files:
output_file.write(indent)
output_file.write("pub use %s::%s::mangled::*;\n" % (prefix, input_name))
for name, mod in self.nested.items():
new_prefix = prefix + "::" + name
mod.emit_mangled(output_file, indent, prefix=new_prefix)
def main(output, root, inputs, imports):
root_module = RustModule()
for inp in inputs:
in_rel = os.path.relpath(inp, root)
in_path = pathlib.PurePath(in_rel)
node = root_module
for part in in_path.parts[:-1]:
node = node.nested[part]
if os.path.isfile(inp):
in_name, in_ext = os.path.splitext(in_path.parts[-1])
node.files.append((in_name, inp))
with open(output, "w") as lib_rs_file:
# Enable custom attributes for #![rustfmt::skip]
lib_rs_file.write("#![feature(custom_inner_attributes)]\n")
lib_rs_file.write("#![allow(non_snake_case)]\n")
lib_rs_file.write("#![allow(missing_docs)]\n")
lib_rs_file.write("pub use binder;\n")
lib_rs_file.write("pub mod aidl {\n")
root_module.emit(lib_rs_file, indent=" ")
lib_rs_file.write("}\n")
lib_rs_file.write("pub mod mangled {\n")
root_module.emit_mangled(lib_rs_file, indent=" ", prefix="super::aidl")
for imp in imports:
lib_rs_file.write(" pub(crate) use %s::mangled::*;\n" % imp)
lib_rs_file.write("}\n")
if __name__ == "__main__":
parser = argparse.ArgumentParser(description='Generate the top-level lib.rs.')
parser.add_argument('output', help='Path to output .rs file')
parser.add_argument('root', help='Common ancestor of all input files')
parser.add_argument('inputs', nargs='+', help='Input .rs files')
parser.add_argument('-I', '--import', action='append', dest='imports',
default=[], help='Crates to import')
args = parser.parse_args()
if args is None:
sys.exit(1)
sys.exit(main(args.output, args.root, args.inputs, args.imports))
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