1 //
2 // Copyright 2022 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 use std::env;
17 use std::path::{Path, PathBuf};
18 use std::process::Command;
19
main()20 fn main() {
21 install_generated_module(
22 "lmp_packets.rs",
23 "LMP_PACKETS_PREBUILT",
24 &PathBuf::from("lmp_packets.pdl").canonicalize().unwrap(),
25 );
26 install_generated_module(
27 "hci_packets.rs",
28 "HCI_PACKETS_PREBUILT",
29 &PathBuf::from("../packets/hci/hci_packets.pdl").canonicalize().unwrap(),
30 );
31 }
32
install_generated_module(module_name: &str, prebuilt_var: &str, pdl_name: &PathBuf)33 fn install_generated_module(module_name: &str, prebuilt_var: &str, pdl_name: &PathBuf) {
34 let module_prebuilt = match env::var(prebuilt_var) {
35 Ok(dir) => PathBuf::from(dir),
36 Err(_) => PathBuf::from(module_name),
37 };
38
39 if Path::new(module_prebuilt.as_os_str()).exists() {
40 let out_dir = PathBuf::from(env::var("OUT_DIR").unwrap());
41 std::fs::copy(
42 module_prebuilt.as_os_str().to_str().unwrap(),
43 out_dir.join(module_name).as_os_str().to_str().unwrap(),
44 )
45 .unwrap();
46 } else {
47 generate_module(pdl_name);
48 }
49 }
50
generate_module(pdl_name: &PathBuf)51 fn generate_module(pdl_name: &PathBuf) {
52 let out_dir = PathBuf::from(env::var("OUT_DIR").unwrap());
53
54 // Find the packetgen tool. Expecting it at CARGO_HOME/bin
55 let packetgen = match env::var("CARGO_HOME") {
56 Ok(dir) => PathBuf::from(dir).join("bin").join("bluetooth_packetgen"),
57 Err(_) => PathBuf::from("bluetooth_packetgen"),
58 };
59
60 if !Path::new(packetgen.as_os_str()).exists() {
61 panic!(
62 "bluetooth_packetgen not found in the current environment: {:?}",
63 packetgen.as_os_str().to_str().unwrap()
64 );
65 }
66
67 println!("cargo:rerun-if-changed={}", pdl_name.display());
68 let output = Command::new(packetgen.as_os_str().to_str().unwrap())
69 .arg("--out=".to_owned() + out_dir.as_os_str().to_str().unwrap())
70 .arg("--include=".to_owned() + pdl_name.parent().unwrap().as_os_str().to_str().unwrap())
71 .arg("--rust")
72 .arg(pdl_name)
73 .output()
74 .unwrap();
75
76 println!(
77 "Status: {}, stdout: {}, stderr: {}",
78 output.status,
79 String::from_utf8_lossy(output.stdout.as_slice()),
80 String::from_utf8_lossy(output.stderr.as_slice())
81 );
82
83 assert!(output.status.success());
84 }
85