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use std::io;
use walkdir;
use walkdir::WalkDir;
use std::fs::File;
use std::io::prelude::*;
use seahash::hash as hashvec;
fn noice_err(e: walkdir::Error) -> io::Error {
match e.into_io_error() {
Some(e) => e,
None => io::Error::new(io::ErrorKind::Other, "Unknown Error"),
}
}
pub fn hash<P: AsRef<std::path::Path>>(dir: P) -> Result<u64, io::Error> {
let mut buffer: Vec<u8> = vec![];
let mut hashes: Vec<u64> = vec![];
for entry in WalkDir::new(dir).into_iter() {
let entry = entry.map_err(noice_err)?.into_path();
if entry.is_file(){
File::open(entry)?.read_to_end(&mut buffer)?;
hashes.push(hashvec(&buffer));
}
}
let mut final_hash: Vec<u8> = vec![];
hashes.sort_unstable();
for elem in hashes{
let bys: [u8; 8] = unsafe{std::mem::transmute::<u64, [u8;8]>(elem)};
final_hash.extend(&bys)
}
Ok(hashvec(&final_hash))
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn it_works() {
assert_eq!(2 + 2, 4);
}
}