protobuf_gen/
main.rs
1use clap::{App, Arg};
6use serde_derive::Deserialize;
7use std::{collections::HashMap, fs, path::PathBuf};
8
9#[derive(Deserialize, Debug)]
10struct ProtobufOpts {
11 dir: String,
12 out_dir: Option<String>,
13}
14
15fn main() {
16 let matches = App::new("Protobuf files generator")
17 .about("Generates Rust structs from protobuf files in the repository.")
18 .arg(
19 Arg::with_name("PROTOBUF_CONFIG")
20 .help("Absolute path to the protobuf configuration file.")
21 .required(true),
22 )
23 .get_matches();
24 let config_path = matches.value_of("PROTOBUF_CONFIG").unwrap();
25 let config_path = PathBuf::from(config_path);
26 let files_config = fs::read_to_string(&config_path).expect("unable to read protobuf_files");
27 let files: HashMap<String, ProtobufOpts> = toml::from_str(&files_config).unwrap();
28 let config_dir = config_path.parent().unwrap();
29
30 for (proto_file, opts) in files {
31 let mut config = prost_build::Config::new();
33 let out_dir = opts.out_dir.clone().unwrap_or_else(|| opts.dir.clone());
34 let out_dir_absolute = config_dir.join(out_dir).canonicalize().unwrap();
35 let out_dir_absolute = out_dir_absolute.to_str().unwrap();
36 let proto_path_absolute = config_dir
37 .join(&opts.dir)
38 .join(proto_file)
39 .canonicalize()
40 .unwrap();
41 let proto_path_absolute = proto_path_absolute.to_str().unwrap();
42 let include_dir_absolute = config_dir.join(&opts.dir).canonicalize().unwrap();
43 let include_dir_absolute = include_dir_absolute.to_str().unwrap();
44 config.out_dir(out_dir_absolute);
45 config
46 .compile_protos(&[proto_path_absolute], &[&include_dir_absolute])
47 .unwrap();
48 }
49}