Get File Paths Without Directoires Using Walkdir In Rust

Code

//! ```cargo
//! [dependencies]
//! walkdir = "2"
//! ```

use std::path::PathBuf;
use walkdir::WalkDir;

fn main() {
    let source_dir = PathBuf::from("glob_test");
    let ext = "txt";
    let file_list = get_file_paths(&source_dir, ext);
    dbg!(file_list);
}

fn get_file_paths(source_dir: &PathBuf, extension: &str) -> Vec<PathBuf> {
    let walker = WalkDir::new(source_dir).into_iter();
    walker
        .filter_map(|path_result| match path_result {
            Ok(path) => match path.path().extension() {
                Some(ext) => {
                    if ext == extension {
                        Some(path.path().to_path_buf())
                    } else {
                        None
                    }
                }
                None => None,
            },
            Err(_) => None,
        })
        .collect()
}

Results

[_active_nvim_run:13] file_list = [
    "glob_test/echo.txt",
    "glob_test/BRAVO.txt",
    "glob_test/fOxtrOt.txt",
    "glob_test/hotel.txt",
    "glob_test/charlie.txt",
    "glob_test/golf.txt",
    "glob_test/delta.txt",
    "glob_test/alfa.txt",
]

Notes

The example on the walkdir page uses `filter_entry()`` but that doesn't descend into a directory if it doesn't match. So, it doesn't find all matching files.
This gets all files based off extension without that filter blocking them.
This also converts the `WalkDir`` `DirEntry``s to `PathBuf``s