commit f06da146a74cb8c1a0e06d5c55c279159a88e63e
Author: Bryson Steck <me@brysonsteck.xyz>
Date:   Tue Jul 15 21:06:35 2025 -0600

    init; working prototype

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ea8c4bf
--- /dev/null
+++ b/.gitignore
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diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..b52e14a
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+++ b/Cargo.lock
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..3e61c93
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "psha"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+sha2 = "0.10.9"
+clap = { version = "4.5.29", features = ["derive"] }
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..20b9e36
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,82 @@
+use sha2::{Sha256, Digest};
+use std::ops::Deref;
+use std::path::PathBuf;
+use std::thread;
+use std::thread::available_parallelism;
+use std::fs::File;
+use std::io;
+use clap::Parser;
+use std::sync::Arc;
+use std::sync::Mutex;
+use std::collections::VecDeque;
+use std::fs;
+
+#[derive(Parser)]
+#[command(name = "psha")]
+#[command(version = option_env!("CARGO_PKG_VERSION"))]
+#[command(long_about = None)]
+struct Args {
+  #[arg(
+    trailing_var_arg = true,
+  )]
+  files: Vec<PathBuf>,
+}
+
+fn checksum(thread_id: usize, filenames: Arc<Mutex<VecDeque<PathBuf>>>) -> Result<(), String> {
+  let running = true;
+  while running {
+    let filename = match filenames.lock().unwrap().pop_front() {
+      Some(f) => f,
+      None => return Ok(())
+    };
+    let mut hasher = Sha256::new();
+    let mut file = File::open(&filename).unwrap();
+
+    io::copy(&mut file, &mut hasher);
+    let hash = hasher.finalize();
+    // println!("thread {} result: {:x}\t{}", thread_id, hash, filename.as_path().display());
+    println!("{:x}\t{}", hash, filename.as_path().display());
+  }
+
+  println!("thread {} has ran out of work", thread_id);
+
+  Ok(())
+}
+
+fn main() {
+  let args = Args::parse();
+  let cpus = available_parallelism().unwrap().get();
+  let mut buffer = VecDeque::new();
+  let mut handles = vec![];
+  for file in args.files {
+    // match fs::canonicalize(file.as_path()) {
+    //   Ok(p) => buffer.push_back(p),
+    //   Err(e) => panic!("unable to canonicalize {}: {}", file.as_path().display(), e)
+    // };
+    buffer.push_back(file);
+  }
+  let arc_buf = Arc::new(Mutex::new(buffer));
+  // let mut handles = vec![];
+  // let chunks = Arc::new(Mutex::new(args.files.chunks(args.files.len()/ cpus).clone()));
+/*   let threads = chunks.into_iter().map(|chunk| {
+    thread::spawn(move || checksum(0, chunk.to_vec()))
+  }).collect::<Vec<_>>(); */
+
+/*   threads.into_iter().for_each(|i| { i.join().unwrap(); });
+  // for file in args.files {
+  //   if let Err(e) = checksum(0, file) { */
+  //     println!("{}", e);
+  //     break;
+  //   };
+  // }
+  for i in 0..cpus {
+    let safe = Arc::clone(&arc_buf);
+    handles.push(thread::spawn(move || checksum(i, safe)))
+  }
+
+  for handle in handles {
+    handle.join().unwrap();
+  }
+
+  // println!("{}", available_parallelism().unwrap().get());
+}