Worker written

TODO: Preserve file ext

Fortune for lazy-rebuild's current commit: Curse − 凶

src/ext.rs

@@ -78,3 +78,16 @@ where I: IntoIterator,
 	}
     }
 }
+
+pub trait HexStringSliceExt
+{
+    fn to_hex_string(&self) -> String;
+}
+
+impl<T> HexStringSliceExt for T
+where T: AsRef<[u8]>
+{
+    fn to_hex_string(&self) -> String {
+	self.as_ref().iter().copied().hex_string().collect()
+    }
+}

src/handle.rs

@@ -92,7 +92,7 @@ impl From<()> for Options
 ///
 /// # Returns
 /// The input stream and output stream `(tx, rx)`.
-pub fn spawn_with_cancel(opt: Options, cancel: impl Future<Output = ()> + 'static + Send + Unpin) -> (mpsc::Sender<PathBuf>, impl Stream<Item = (PathBuf, io::Result<sha256::Sha256Hash>)> + Send + Sync + 'static)
+pub fn spawn_with_cancel(opt: Options, cancel: impl Future<Output = ()> + 'static + Send) -> (mpsc::Sender<PathBuf>, impl Stream<Item = (PathBuf, io::Result<sha256::Sha256Hash>)> + Send + Sync + 'static)
 {
     let (tx, rx) = mpsc::channel(opt.forward_pressure.into());
     let rx = file_handler(rx,cancel , match opt.max_operations {
@@ -132,7 +132,7 @@ pub fn spawn(opt: Options) -> (mpsc::Sender<PathBuf>, impl Stream<Item = (PathBu
 /// # Returns
 /// A stream yielding a tuple of the input file path and the file's hash, or the IO error responsible for the failure
 fn file_handler<C>(mut recv: mpsc::Receiver<PathBuf>, cancel: C, max_ops: usize, backpressure: usize) -> impl Stream<Item = (PathBuf, io::Result<sha256::Sha256Hash>)> + Unpin + Send + Sync + 'static
-where C: Future<Output = ()> + 'static + Unpin + Send
+where C: Future<Output = ()> + 'static + Send
 {
     
     let (r_tx, r_rx) = mpsc::channel(backpressure);

src/main.rs

@@ -6,24 +6,12 @@ mod ext; use ext::*;
 mod pool;
 mod handle;
 
+mod work;
+
 #[tokio::main]
-async fn main() {
+async fn main() -> std::io::Result<()> {
     //TODO: Is one hashing handler enough? Or should we have a pool of handlers, with a capacity of the number of threads or something? If we do that, we should disable tokio's threaded scheduler by default.
-    let (tx, mut rx) = handle::spawn(Default::default());
+
-    let _res = tokio::join![
-	tokio::spawn(async move {
-	    for file in ["./src/main.rs", "./src/handle.rs", "./target", "./tet", "./"]
-	    {
-		eprintln!("Sending {}", file);
-		tx.send(std::path::Path::new(file).into()).await.unwrap();
-	    }
-	}),
-	tokio::spawn(async move {
     use futures::prelude::*;
-	    while let Some((file, hash)) = rx.next().await {
+    work::start(std::env::args().skip(1), tokio::signal::ctrl_c().map(|_| ())).await
-		println!("Got file hash for {:?}: {:?}", file, hash.map(|x| x.as_ref().iter().copied().hex_string().collect::<String>()));
-	    }
-	}),
-    ];
-    eprintln!("Done: {:?}", _res);
 }

src/work.rs

@@ -0,0 +1,107 @@
+use super::*;
+
+use futures::{
+    Future,
+    Stream, StreamExt,
+};
+use tokio::io::{
+    AsyncReadExt,
+    AsyncWriteExt,
+};
+use tokio::sync::{
+    mpsc,
+};
+use std::io;
+use std::path::{Path, PathBuf};
+use tokio::fs;
+
+#[derive(Debug, Clone)]
+struct State
+{
+    handle_file: mpsc::Sender<PathBuf>,
+}
+
+async fn handle_file(state: State, file: PathBuf) -> io::Result<()>
+{
+    debug_assert!(file.is_file());
+
+    state.handle_file.send(file).await.unwrap();
+    
+    Ok(())
+}
+
+#[inline(always)] fn handle_dir2(state: State, dir: PathBuf) -> futures::future::BoxFuture<'static, io::Result<()>>
+{
+    use futures::prelude::*;
+
+    handle_dir(state, dir).boxed()
+}
+
+async fn handle_dir(state: State, dir: impl AsRef<Path>) -> io::Result<()>
+{
+    debug_assert!(dir.as_ref().is_dir());
+    let mut read = fs::read_dir(dir).await?;
+    while let Some(item) = read.next_entry().await?
+    {
+	let path = item.path();
+	if path.is_file() {
+	    tokio::spawn(handle_file(state.clone(), path));
+	} else {
+	    tokio::spawn(handle_dir2(state.clone(), path));
+	}
+    }
+    Ok(())
+}
+
+pub async fn start<I, T>(bases: I, cancel: impl Future<Output=()> + Send + 'static) -> io::Result<()>
+where I: IntoIterator<Item = T>,
+      T: AsRef<Path>,
+{
+    let (tx, rx) = handle::spawn_with_cancel(Default::default(), cancel);
+    let renamer = tokio::spawn(async move {
+	use futures::prelude::*;
+	rx.for_each_concurrent(4, |(path, hash)| async move
+			       {
+				   match hash {
+				       Ok(hash) => {
+					   let new_name = path.parent().unwrap().join(hash.to_hex_string());
+					   if let Err(_) = tokio::spawn(async move {
+					       match fs::rename(&path, &new_name).await
+					       {
+						   Ok(_) => println!("[.] {:?} -> {:?}", path, new_name),
+						   Err(err) => println!("[!] {:?}: {}", path, err),
+					       }
+					   }).await {
+					       eprintln!("[!] panic: rename");
+					   }
+				       },
+				       Err(err) => {
+					   eprintln!("[!] {:?}: {}", path, err);
+				       },
+				   }
+			       }).await;
+    });
+
+    let res = 'result: loop {
+	let state = State { handle_file: tx};
+	let res = futures::future::join_all(bases.into_iter().map(|base| {
+	    use futures::prelude::*;
+	    if base.as_ref().is_dir() {
+		handle_dir(state.clone(), base).boxed_local()
+	    } else {
+		handle_file(state.clone(), base.as_ref().to_owned()).boxed_local()
+	    }
+	})).await;
+	for res in res {
+	    match res {
+		Ok(_) => (),
+		Err(err) => break 'result Err(err),
+	    }
+	}
+	break Ok(());
+    };
+    
+    assert!(renamer.await.is_ok(), "[!] fatal: renamer task panic");
+
+    res
+}