lix/nix-rust/src/lib.rs

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#![feature(await_macro, async_await)]
mod binary_cache_store;
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mod error;
mod foreign;
mod store;
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mod tarfile;
mod path_info;
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pub use error::Error;
pub struct CBox<T> {
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pub ptr: *mut libc::c_void,
phantom: std::marker::PhantomData<T>,
}
impl<T> CBox<T> {
fn new(t: T) -> Self {
unsafe {
let size = std::mem::size_of::<T>();
let ptr = libc::malloc(size);
*(ptr as *mut T) = t; // FIXME: probably UB
Self {
ptr,
phantom: std::marker::PhantomData,
}
}
}
}
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#[no_mangle]
pub extern "C" fn unpack_tarfile(
source: foreign::Source,
dest_dir: &str,
) -> CBox<Result<(), error::CppException>> {
CBox::new(tarfile::unpack_tarfile(source, dest_dir).map_err(|err| err.into()))
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}
#[no_mangle]
pub extern "C" fn rust_test() {
use crate::store::Store;
use futures::future::{FutureExt, TryFutureExt};
use std::path::Path;
let fut = async move {
let store: Box<dyn Store> = Box::new(binary_cache_store::BinaryCacheStore::new(
"https://cache.nixos.org".to_string(),
));
let path = store
.parse_store_path(&Path::new(
"/nix/store/7h7qgvs4kgzsn8a6rb273saxyqh4jxlz-konsole-18.12.3",
))
.unwrap();
/*
let info = store.query_path_info(&path).await.unwrap();
eprintln!("INFO = {:?}", info);
*/
let closure = store.compute_path_closure(vec![path].into_iter().collect()).await.unwrap();
eprintln!("CLOSURE = {:?}", closure.len());
Ok(())
};
tokio::run(fut.boxed().compat());
}