paths_matching.rs

use std::ffi::OsStr;
use std::io;
use std::fs::{self};
use std::path::{Path, PathBuf};

// Find all files in the given directory with the given extension
fn paths_matching(extension: &str, dir: &Path) -> io::Result<Vec<PathBuf>> {
    let mut paths: Vec<PathBuf> = Vec::new();
    for entry in fs::read_dir(dir)? {
        let entry = entry?;
        let path = entry.path();
        if path.extension() == Some(OsStr::new(extension)) {
            paths.push(path);
        }
    }
    Ok(paths)
}