Function expand_args 

pub fn expand_args(args: &[String]) -> Vec<String>

Expand glob patterns in arguments.

This function expands shell-style glob patterns like *.txt or **/*.rs into a list of matching file paths. Arguments that don’t contain glob patterns or don’t match any files are returned as-is.

Glob Patterns

• * matches any sequence of characters except path separators
• ? matches any single character except path separators
• ** matches any sequence of characters including path separators
• [...] matches any character in the brackets
• [!...] matches any character not in the brackets

Example

use click::utils::expand_args;

// Assuming *.txt files exist in the current directory
let args = vec!["file.rs".to_string(), "*.txt".to_string()];
let expanded = expand_args(&args);
// Returns ["file.rs", "a.txt", "b.txt", ...] if those files exist

Reference

Based on Python Click’s utils.py:_expand_args.