Function findCompiledModule

src/nbind.ts:153–209

(
	basePath: string,
	specList: FindModuleSpec[],
	callback: FindCallback
)

export type FindCallback = (err: any, result?: ModuleSpec) => any;

function findCompiledModule<ResultType>(
	basePath: string,
	specList: FindModuleSpec[],
	callback: FindCallback
) {
	const resolvedList: string[] = [];
	const ext = path.extname(basePath);

	/** If basePath has a known extension, check if it's a loadable module. */

	for(let spec of specList) {
		if(ext == spec.ext) {
			try {
				spec.path = require.resolve(basePath);

				// Stop if a module was found.
				callback(null, spec as ModuleSpec);
				return(spec);
			} catch(err) {
				resolvedList.push(basePath);
			}
		}
	}

	/** Try all possible subdirectories of basePath. */

	for(let spec of specList) {
		// Check if any possible path contains a loadable module,
		// and store unsuccessful attempts.

		for(let pathParts of makeModulePathList(basePath, spec.name)) {
			const resolvedPath = path.resolve.apply(path, pathParts);

			try {
				spec.path = require.resolve(resolvedPath);
			} catch(err) {
				resolvedList.push(resolvedPath);
				continue;
			}

			// Stop if a module was found.

			callback(null, spec as ModuleSpec);
			return(spec);
		}
	}

	const err = new Error(
		'Could not locate the bindings file. Tried:\n' +
		resolvedList.join('\n')
	);

	(err as any).tries = resolvedList;

	callback(err);
	return(null);
}