Function main

nodedb/build.rs:6–58

()

use std::time::{SystemTime, UNIX_EPOCH};

fn main() {
    // Invalidate when the current commit changes.
    println!("cargo:rerun-if-changed=.git/HEAD");

    // --- git commit ---
    let git_commit = Command::new("git")
        .args(["rev-parse", "--short", "HEAD"])
        .output()
        .ok()
        .and_then(|o| {
            if o.status.success() {
                String::from_utf8(o.stdout).ok()
            } else {
                None
            }
        })
        .map(|s| s.trim().to_owned())
        .filter(|s| !s.is_empty())
        .unwrap_or_else(|| "unknown".to_owned());

    println!("cargo:rustc-env=NODEDB_GIT_COMMIT={git_commit}");

    // --- build date ---
    let secs = SystemTime::now()
        .duration_since(UNIX_EPOCH)
        .expect("system clock is before Unix epoch")
        .as_secs();

    let date = civil_from_days(secs / 86400);
    println!("cargo:rustc-env=NODEDB_BUILD_DATE={date}");

    // --- build profile ---
    let profile = std::env::var("PROFILE").unwrap_or_else(|_| "unknown".to_owned());
    println!("cargo:rustc-env=NODEDB_BUILD_PROFILE={profile}");

    // --- rust version ---
    let rust_version = Command::new("rustc")
        .arg("--version")
        .output()
        .ok()
        .and_then(|o| {
            if o.status.success() {
                String::from_utf8(o.stdout).ok()
            } else {
                None
            }
        })
        .map(|s| s.trim().to_owned())
        .filter(|s| !s.is_empty())
        .unwrap_or_else(|| "unknown".to_owned());

    println!("cargo:rustc-env=NODEDB_RUST_VERSION={rust_version}");
}

/// Howard Hinnant's civil_from_days algorithm.
/// Converts a day count since the Unix epoch (1970-01-01) to a `YYYY-MM-DD` string.