passbox 1.0.0

A password store for agents, where a fingerprint releases one secret into one process
Documentation 
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use std::path::PathBuf;
use std::process::Command;

fn main() {
    println!("cargo:rerun-if-changed=swift/passbox-se.swift");

    // Only a host talks to the Secure Enclave, so a client build needs no Swift at all
    if std::env::var_os("CARGO_FEATURE_HOST").is_none()
        || std::env::var("CARGO_CFG_TARGET_OS").as_deref() != Ok("macos")
    {
        return;
    }

    // swiftc follows the host architecture unless told, which breaks a universal build
    let arch = match std::env::var("CARGO_CFG_TARGET_ARCH").as_deref() {
        Ok("x86_64") => "x86_64",
        _ => "arm64",
    };

    let out = PathBuf::from(std::env::var("OUT_DIR").expect("OUT_DIR")).join("passbox-se");
    let status = Command::new("swiftc")
        .args(["-O", "-target", &format!("{arch}-apple-macosx13.0"), "-o"])
        .arg(&out)
        .arg("swift/passbox-se.swift")
        .status()
        .expect("swiftc is missing, install the Command Line Tools");

    assert!(
        status.success(),
        "could not build the Secure Enclave helper"
    );

    // The helper hands back the store key, so it refuses a debugger too. Ad hoc, no account needed
    let signed = Command::new("codesign")
        .args(["-s", "-", "--force", "--options", "runtime"])
        .arg(&out)
        .status()
        .expect("codesign is missing, install the Command Line Tools");
    assert!(signed.success(), "could not sign the Secure Enclave helper");
}