rhai/build.rs
2022-10-25 20:53:27 +08:00

28 lines
823 B
Rust

use std::{
env,
fs::File,
io::{Read, Write},
};
fn main() {
// Tell Cargo that if the given environment variable changes, to rerun this build script.
println!("cargo:rerun-if-changed=build.template");
println!("cargo:rerun-if-env-changed=RHAI_AHASH_SEED");
let mut contents = String::new();
File::open("build.template")
.expect("cannot open `build.template`")
.read_to_string(&mut contents)
.expect("cannot read from `build.template`");
let seed = env::var("RHAI_AHASH_SEED").map_or_else(|_| "None".into(), |s| format!("Some({s})"));
contents = contents.replace("{{AHASH_SEED}}", &seed);
File::create("src/config.rs")
.expect("cannot create `config.rs`")
.write(contents.as_bytes())
.expect("cannot write to `config.rs`");
}