//! The setup app trusts exactly what the app's updater trusts: the public
//! key in the app's tauri.conf.json. Read at build time so there is one
//! copy of it in the repository.
use std::path::{Path, PathBuf};

fn main() {
    let manifest = PathBuf::from(std::env::var("CARGO_MANIFEST_DIR").unwrap());
    let conf = manifest.join("../../src-tauri/tauri.conf.json");
    println!("cargo:rerun-if-changed={}", conf.display());
    let text = std::fs::read_to_string(&conf).expect("read src-tauri/tauri.conf.json");
    let json: serde_json::Value = serde_json::from_str(&text).expect("parse tauri.conf.json");
    let pubkey = json["plugins"]["updater"]["pubkey"]
        .as_str()
        .filter(|s| !s.is_empty())
        .expect("plugins.updater.pubkey in src-tauri/tauri.conf.json");
    let out = Path::new(&std::env::var("OUT_DIR").unwrap()).join("pubkey.rs");
    std::fs::write(&out, format!("pub const PUBKEY: &str = {pubkey:?};\n")).expect("write pubkey.rs");
    tauri_build::build();
}