dioxus/packages/interpreter/build.rs
2024-03-01 23:37:46 -08:00

70 lines
2.2 KiB
Rust

use std::{
fs::read_to_string,
hash::{DefaultHasher, Hash, Hasher},
process::Command,
};
fn main() {
// If any TS changes, re-run the build script
println!("cargo:rerun-if-changed=src/ts/*.ts,*.json");
// Compute the hash of the ts files
let hash = hash_dir("src/ts");
// If the hash matches the one on disk, we're good and don't need to update bindings
if let Ok(contents) = read_to_string("src/js/hash.txt") {
if contents.trim() == hash.to_string() {
return;
}
}
// Otherwise, generate the bindings and write the new hash to disk
// Generate the bindings for both native and web
gen_bindings("interpreter_native", "native");
gen_bindings("interpreter_web", "web");
std::fs::write("src/js/hash.txt", hash.to_string()).unwrap();
}
/// Hashes the contents of a directory
fn hash_dir(dir: &str) -> u64 {
let mut hasher = DefaultHasher::new();
for entry in std::fs::read_dir(dir).unwrap() {
let entry = entry.unwrap();
let path = entry.path();
let metadata = std::fs::metadata(&path).unwrap();
if metadata.is_file() {
let contents = std::fs::read(&path).unwrap();
contents.hash(&mut hasher);
}
}
hasher.finish()
}
// okay...... so tsc might fail if the user doesn't have it installed
// we don't really want to fail if that's the case
// but if you started *editing* the .ts files, you're gonna have a bad time
// so.....
// we need to hash each of the .ts files and add that hash to the JS files
// if the hashes don't match, we need to fail the build
// that way we also don't need
fn gen_bindings(input_name: &str, output_name: &str) {
// If the file is generated, and the hash is different, we need to generate it
let status = Command::new("bun")
.arg("build")
.arg(format!("src/ts/{input_name}.ts"))
.arg("--outfile")
.arg(format!("src/js/{output_name}.js"))
// .arg("--minify")
.status()
.unwrap();
if !status.success() {
panic!(
"Failed to generate bindings for {}. Make sure you have tsc installed",
input_name
);
}
}