ows-cli 0.3.7

CLI for the Open Wallet Standard
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use std::process::Command;

fn main() {
    let commit = Command::new("git")
        .args(["rev-parse", "--short", "HEAD"])
        .output()
        .ok()
        .filter(|o| o.status.success())
        .and_then(|o| String::from_utf8(o.stdout).ok())
        .map(|s| s.trim().to_string())
        .unwrap_or_else(|| "unknown".to_string());

    // Derive version from git tag (e.g. "v0.3.0" -> "0.3.0"), falling back to Cargo.toml version
    let version = Command::new("git")
        .args(["describe", "--tags", "--abbrev=0"])
        .output()
        .ok()
        .filter(|o| o.status.success())
        .and_then(|o| String::from_utf8(o.stdout).ok())
        .map(|s| s.trim().trim_start_matches('v').to_string())
        .unwrap_or_else(|| env!("CARGO_PKG_VERSION").to_string());

    println!("cargo:rustc-env=OWS_GIT_COMMIT={commit}");
    println!("cargo:rustc-env=OWS_VERSION={version}");
    // Rebuild if the git HEAD or tags change
    println!("cargo:rerun-if-changed=.git/HEAD");
    println!("cargo:rerun-if-changed=.git/refs/tags");
}