Glob Multiple File Types

Question

I want to find files for some pattern with multiple extensions. Ex:-

some/path/**.{json,jsonc}

But rust glob function is not working with these types of patterns. Here is my workaround:-

extern crate glob;

use glob::glob;

fn main() {
    for file_name_result in glob("example/**.{json,jsonc}").unwrap() {
        match file_name_result {
            Ok(file_path) => {
                println!("Found:{}", file_path.display());
            }
            Err(e) => {
                eprintln!("ERROR: {}", e);
            }
        };
    }
}

Answer 1

You're right, glob doesn't accept this kind of pattern. You need to call it once for each extension:

extern crate glob;

use glob::glob;

fn main() {
    for file_name_result in glob("example/**/*.json")
        .unwrap()
        .chain(glob("example/**/*.jsonc").unwrap())
    {
        match file_name_result {
            Ok(file_path) => {
                println!("Found:{}", file_path.display());
            }
            Err(e) => {
                eprintln!("ERROR: {}", e);
            }
        };
    }
}

Answer 2

For those looking for more advanced use cases of glob, there is also the globwalk library which handles multiple extensions and exclusions.

example/**.{json,jsonc}

Here is a code snippet from their documentation.

extern crate globwalk;

use std::fs;

let walker = globwalk::GlobWalkerBuilder::from_patterns(
        BASE_DIR,
        &["*.{png,jpg,gif}", "!Pictures/*"],
    )
    .max_depth(4)
    .follow_links(true)
    .build()?
    .into_iter()
    .filter_map(Result::ok);

for img in walker {
    fs::remove_file(img.path())?;
}