#[cfg(feature = "serialization-protobuf")]
extern crate protoc_rust;
#[cfg(feature = "serialization-protobuf")]
fn has_right_protoc_version(version: &str) -> bool {
use std::process::{Command, Stdio};
let protoc = Command::new("protoc")
.stdin(Stdio::null())
.stdout(Stdio::piped())
.stderr(Stdio::piped())
.args(&["--version"])
.spawn()
.unwrap();
let version_output = protoc.wait_with_output().unwrap();
assert!(version_output.status.success());
String::from_utf8(version_output.stdout).unwrap().trim() == version.trim()
}
#[cfg(feature = "serialization-protobuf")]
fn build_protobuf(out_dir: &str, input: &[&str], includes: &[&str]) {
use self::protoc_rust::{run, Args};
run(Args {
out_dir,
input,
includes,
customize: Default::default(),
}).expect("protoc");
}
#[cfg(feature = "serialization-protobuf")]
fn build_protobuf_schemata() {
use std::fs::File;
use std::io::Read;
let mut version_string = String::new();
let mut version_pin =
File::open("PROTOC_VERSION").expect("protoc version pin `PROTOC_VERSION` file is missing");
version_pin
.read_to_string(&mut version_string)
.expect("cannot read protoc pin file");
if !has_right_protoc_version(&version_string) {
eprintln!(
"Build failed because merkle.rs could not find: {}",
version_string
);
std::process::exit(1);
}
build_protobuf("src/proto", &["protobuf/proof.proto"], &[]);
}
fn main() {
#[cfg(feature = "serialization-protobuf")]
build_protobuf_schemata();
}