cloud-hypervisor/build.rs

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Rust
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// Copyright © 2020 Intel Corporation
//
// SPDX-License-Identifier: Apache-2.0
//
#[macro_use(crate_version)]
extern crate clap;
use std::process::Command;
fn main() {
let mut version = "v".to_owned() + crate_version!();
if let Ok(git_out) = Command::new("git").args(&["describe", "--dirty"]).output() {
if git_out.status.success() {
if let Ok(git_out_str) = String::from_utf8(git_out.stdout) {
version = git_out_str;
}
}
}
// This println!() has a special behavior, as it will set the environment
// variable BUILT_VERSION, so that it can be reused from the binary.
// Particularly, this is used from src/main.rs to display the exact
// version.
println!("cargo:rustc-env=BUILT_VERSION={}", version);
}