Function validate_file_path 

pub fn validate_file_path(path: &Path) -> PatternsResult<PathBuf>

Validate and canonicalize a file path.

This function:

1. Checks that the path exists
2. Canonicalizes the path (resolves symlinks, ., ..)
3. Rejects system directories
4. Validates UTF-8 encoding

Arguments

• path - The path to validate

Returns

The canonicalized path if valid, or an error.

Errors

• PatternsError::FileNotFound if the file doesn’t exist
• PatternsError::PathTraversal if path is a system dir or has invalid encoding

Example

let valid = validate_file_path(Path::new("src/main.py"))?;
assert!(valid.is_absolute());