1 //
2 // Copyright 2021 Google, Inc.
3 //
4 // Licensed under the Apache License, Version 2.0 (the "License");
5 // you may not use this file except in compliance with the License.
6 // You may obtain a copy of the License at:
7 //
8 // http://www.apache.org/licenses/LICENSE-2.0
9 //
10 // Unless required by applicable law or agreed to in writing, software
11 // distributed under the License is distributed on an "AS IS" BASIS,
12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 // See the License for the specific language governing permissions and
14 // limitations under the License.
15
16 extern crate protoc_grpcio;
17 extern crate protoc_rust;
18
19 use std::env;
20 use std::fs;
21 use std::io::Write;
22 use std::path::{Path, PathBuf};
23
paths_to_strs<P: AsRef<Path>>(paths: &[P]) -> Vec<&str>24 fn paths_to_strs<P: AsRef<Path>>(paths: &[P]) -> Vec<&str> {
25 paths.iter().map(|p| p.as_ref().as_os_str().to_str().unwrap()).collect()
26 }
27
28 // Generate mod.rs files for given input files.
gen_mod_rs<P: AsRef<Path>>(out_dir: PathBuf, inputs: &[P], grpc: bool)29 fn gen_mod_rs<P: AsRef<Path>>(out_dir: PathBuf, inputs: &[P], grpc: bool) {
30 // Will panic if file doesn't exist or it can't create it
31 let mut f = fs::File::create(out_dir.join("mod.rs")).unwrap();
32
33 f.write_all(b"// Generated by build.rs\n\n").unwrap();
34
35 for i in 0..inputs.len() {
36 let stem = inputs[i].as_ref().file_stem().unwrap();
37 f.write_all(format!("pub mod {}; \n", stem.to_str().unwrap()).as_bytes()).unwrap();
38 if grpc {
39 f.write_all(format!("pub mod {}_grpc;\n", stem.to_str().unwrap()).as_bytes()).unwrap();
40 }
41 }
42 }
43
main()44 fn main() {
45 let out_dir = PathBuf::from(env::var("OUT_DIR").unwrap());
46 let proto_out_dir = out_dir.join("proto_out");
47 let grpc_out_dir = out_dir.join("grpc_out");
48
49 // Make sure to create the output directories before using it
50 match fs::create_dir(proto_out_dir.as_os_str().to_str().unwrap()) {
51 Err(e) => println!("Proto dir failed to be created: {}", e),
52 _ => (),
53 };
54
55 match fs::create_dir(grpc_out_dir.as_os_str().to_str().unwrap()) {
56 Err(e) => println!("Grpc dir failed to be created: {}", e),
57 _ => (),
58 }
59
60 // Proto root is //platform2/bt/system
61 let proto_root = match env::var("PLATFORM_SUBDIR") {
62 Ok(dir) => PathBuf::from(dir).join("bt/system"),
63 // Currently at //platform2/bt/system/gd/rust/facade_proto
64 Err(_) => {
65 PathBuf::from(env::current_dir().unwrap()).join("../../..").canonicalize().unwrap()
66 }
67 };
68
69 //
70 // Generate protobuf output
71 //
72 let facade_dir = proto_root.join("blueberry/facade");
73 let proto_input_files = [facade_dir.join("common.proto")];
74 let proto_include_dirs = [facade_dir.clone()];
75
76 protoc_rust::Codegen::new()
77 .out_dir(proto_out_dir.as_os_str().to_str().unwrap())
78 .inputs(&paths_to_strs(&proto_input_files))
79 .includes(&paths_to_strs(&proto_include_dirs))
80 .customize(Default::default())
81 .run()
82 .expect("protoc");
83
84 //
85 // Generate grpc output
86 //
87 let grpc_proto_input_files = [
88 facade_dir.join("hci/hci_facade.proto"),
89 facade_dir.join("hci/controller_facade.proto"),
90 facade_dir.join("hal/hal_facade.proto"),
91 facade_dir.join("rootservice.proto"),
92 ];
93 let grpc_proto_include_dirs =
94 [facade_dir.join("hci"), facade_dir.join("hal"), facade_dir, proto_root];
95
96 protoc_grpcio::compile_grpc_protos(
97 &grpc_proto_input_files,
98 &grpc_proto_include_dirs,
99 &grpc_out_dir,
100 None,
101 )
102 .expect("Failed to compile gRPC definitions");
103
104 gen_mod_rs(proto_out_dir, &proto_input_files, false);
105 gen_mod_rs(grpc_out_dir, &grpc_proto_input_files, true);
106 }
107