Function require_path 

pub fn require_path<P>(
    path: Option<P>,
    component: &str,
    description: &str,
) -> Result<P, OCRError>
where
    P: AsRef<Path> + Clone,

Validates that a required path option is present and returns the path.

This is a helper for builder patterns where a path is required but stored as an Option<PathBuf>.

Arguments

• path - Optional path to validate
• component - Component name for error message (e.g., “text_recognition”)
• description - Human-readable description of what the path is for

Returns

The path if present.

Errors

Returns an OCRError::ConfigError if the path is None.

Example

use oar_ocr_core::utils::require_path;
use std::path::PathBuf;

let path: Option<PathBuf> = Some(PathBuf::from("/path/to/dict.txt"));
let validated = require_path(path, "text_recognition", "character dictionary path")?;