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WildEgo 2025-11-23 20:19:48 +00:00
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.gitignore vendored Normal file
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/target

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Cargo.lock generated Normal file
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Cargo.toml Normal file
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[package]
name = "hash-gen"
version = "0.1.0"
edition = "2024"
[dependencies]
serde = { version = "1", features = ["derive"] }
serde_json = "1"
xxhash-rust = { version = "0.8.15", features = ["xxh3"] }
rayon = "1.10"
memmap2 = "0.9"
walkdir = "2.3"

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src/main.rs Normal file
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use memmap2::Mmap;
use rayon::prelude::*;
use serde_json::json;
use std::{
collections::BTreeMap,
env, fs,
fs::File,
path::{Path, PathBuf},
sync::Mutex,
};
use walkdir::WalkDir;
use xxhash_rust::xxh3::xxh3_64;
fn hash_file(path: &Path) -> (String, String) {
let file = File::open(path).expect("Failed to open file");
let mmap = unsafe { Mmap::map(&file).expect("Failed to mmap file") };
let hash = xxh3_64(&mmap);
let hash_str = hash.to_string();
let filename = path.file_name().unwrap().to_string_lossy().to_string();
(filename, hash_str)
}
fn collect_files(folder: &Path) -> Vec<PathBuf> {
WalkDir::new(folder)
.into_iter()
.filter_map(|e| e.ok())
.filter(|e| e.path().is_file())
.map(|e| e.path().to_path_buf())
.collect()
}
fn main() -> std::io::Result<()> {
let args: Vec<String> = env::args().collect();
if args.len() != 2 {
eprintln!("Usage: {} <folder>", args[0]);
std::process::exit(1);
}
let folder = Path::new(&args[1]);
if !folder.is_dir() {
eprintln!("Error: '{}' is not a directory", folder.display());
std::process::exit(1);
}
let files = collect_files(folder);
let results: BTreeMap<String, String> = files.par_iter().map(|f| hash_file(f)).collect();
let json_output = json!({ "checksums": results });
fs::write("checksum", serde_json::to_string_pretty(&json_output)?)?;
println!("Done! JSON saved to 'checksum'");
Ok(())
}