build.rs

use anyhow::Result;
use std::env;
use std::process::Command;

fn main() -> Result<()> {
    let _ = vergen::EmitBuilder::builder().git_sha(true).emit();

    println!("cargo:rerun-if-changed=package.json");
    println!("cargo:rerun-if-changed=package-lock.json");
    match Command::new("npm").arg("install").spawn() {
        Err(_proc) => {
            println!("Build requires npm, but it was not found. Please install Node >= 16.16.0.");
            std::process::exit(1);
        }
        Ok(mut child) => {
            let status = child.wait()?;
            if !status.success() {
                println!("Command \"npm install\" failed.");
                std::process::exit(1);
            }
        }
    }

    let jsdir = format!("{}/js", env::var("OUT_DIR").unwrap());
    println!("cargo:rustc-env=JS_DIR={}", jsdir);
    println!("cargo:rerun-if-changed=src/html_files/");
    let status = Command::new("npm")
        .arg("exec")
        .arg("--")
        .arg("tsc")
        .arg("-p")
        .arg("src/html_files/")
        .arg("--outDir")
        .arg(jsdir)
        .spawn()?
        .wait()?;
    if !status.success() {
        println!("Failed to compile typescript.");
        std::process::exit(1);
    }
    Ok(())
}