use std::{
env,
error::Error,
fs,
path::{Path, PathBuf},
process::Command,
};
fn main() -> Result<(), Box<dyn Error>> {
let out = &PathBuf::from(env::var("OUT_DIR")?);
let hash = Command::new("git")
.args(&["describe"])
.output()
.ok()
.and_then(|output| {
if output.status.success() {
String::from_utf8(output.stdout).ok()
} else {
None
}
});
let version = if let Some(hash) = hash {
hash
} else {
assert!(!Path::new(".git").exists(), "you need to install the `git` command line tool to install the git version of `probe-run`");
std::env::var("CARGO_PKG_VERSION")?
};
fs::write(
out.join("version.rs"),
format!(
r#"
/// Supported `postform` version
pub const POSTFORM_VERSION: &str = "{}";
"#,
version.trim(),
),
)?;
Ok(())
}