cloud-hypervisor/performance-metrics/build.rs

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Rust
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// Copyright © 2020 Intel Corporation
//
// SPDX-License-Identifier: Apache-2.0
//
use std::process::Command;
fn main() {
let mut git_human_readable = "v".to_owned() + env!("CARGO_PKG_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) {
git_human_readable = git_out_str;
}
}
}
// This println!() has a special behavior, as it will set the environment
// variable GIT_HUMAN_READABLE, so that it can be reused from the binary.
// Particularly, this is used from the main.rs to display the exact
// version information.
println!("cargo:rustc-env=GIT_HUMAN_READABLE={git_human_readable}");
}