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//
// Copyright 2021 Google, Inc.
//
// 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.
extern crate protobuf_codegen;
extern crate protoc_grpcio;
extern crate protoc_rust;
use std::env;
use std::fs;
use std::io::Write;
use std::path::{Path, PathBuf};
fn paths_to_strs<P: AsRef<Path>>(paths: &[P]) -> Vec<&str> {
paths.iter().map(|p| p.as_ref().as_os_str().to_str().unwrap()).collect()
}
// Generate mod.rs files for given input files.
fn gen_mod_rs<P: AsRef<Path>>(out_dir: PathBuf, inputs: &[P], grpc: bool) {
// Will panic if file doesn't exist or it can't create it
let mut f = fs::File::create(out_dir.join("mod.rs")).unwrap();
f.write_all(b"// Generated by build.rs\n\n").unwrap();
for i in 0..inputs.len() {
let stem = inputs[i].as_ref().file_stem().unwrap();
f.write_all(format!("pub mod {}; \n", stem.to_str().unwrap()).as_bytes()).unwrap();
if grpc {
f.write_all(format!("pub mod {}_grpc;\n", stem.to_str().unwrap()).as_bytes()).unwrap();
}
}
}
fn main() {
let out_dir = PathBuf::from(env::var("OUT_DIR").unwrap());
let proto_out_dir = out_dir.join("proto_out");
let grpc_out_dir = out_dir.join("grpc_out");
// Make sure to create the output directories before using it
match fs::create_dir(proto_out_dir.as_os_str().to_str().unwrap()) {
Err(e) => println!("Proto dir failed to be created: {}", e),
_ => (),
};
match fs::create_dir(grpc_out_dir.as_os_str().to_str().unwrap()) {
Err(e) => println!("Grpc dir failed to be created: {}", e),
_ => (),
}
// Proto root is //platform2/bt/system
let proto_root = match env::var("PLATFORM_SUBDIR") {
Ok(dir) => PathBuf::from(dir).join("bt/system"),
// Currently at //platform2/bt/system/gd/rust/facade_proto
Err(_) => {
PathBuf::from(env::current_dir().unwrap()).join("../../..").canonicalize().unwrap()
}
};
//
// Generate protobuf output
//
let facade_dir = proto_root.join("blueberry/facade");
let proto_input_files = [facade_dir.join("common.proto")];
let proto_include_dirs = [facade_dir.clone()];
protoc_rust::Codegen::new()
.out_dir(proto_out_dir.as_os_str().to_str().unwrap())
.inputs(&paths_to_strs(&proto_input_files))
.includes(&paths_to_strs(&proto_include_dirs))
.customize(Default::default())
.run()
.expect("protoc");
//
// Generate grpc output
//
let grpc_proto_input_files = [
facade_dir.join("hci/hci_facade.proto"),
facade_dir.join("hci/controller_facade.proto"),
facade_dir.join("hal/hal_facade.proto"),
facade_dir.join("rootservice.proto"),
];
let grpc_proto_include_dirs =
[facade_dir.join("hci"), facade_dir.join("hal"), facade_dir, proto_root];
protoc_grpcio::compile_grpc_protos(
&grpc_proto_input_files,
&grpc_proto_include_dirs,
&grpc_out_dir,
None,
)
.expect("Failed to compile gRPC definitions");
gen_mod_rs(proto_out_dir, &proto_input_files, false);
gen_mod_rs(grpc_out_dir, &grpc_proto_input_files, true);
}
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