Function validate_file_exists 

pub fn validate_file_exists(path: &Path, arg_name: &str) -> Result<()>

Validate that a file or directory exists

This function checks if the given path exists on the file system. It works for both files and directories.

Arguments

• path - Path to validate
• arg_name - Name of the argument (for error messages)

Returns

• Ok(()) if the path exists
• Err(ValidationError::FileNotFound) if the path doesn’t exist

Example

use dynamic_cli::validator::file_validator::validate_file_exists;
use std::path::Path;

let path = Path::new("input.txt");
validate_file_exists(path, "input_file")?;

Error Messages

If the file doesn’t exist, the error message includes:

• The argument name
• The full path that was checked

Example: File not found for argument 'input_file': "/path/to/input.txt"