Add REPL function to resolve an alias to its corresponding package

kgryte · kgryte · commit 647f62925f0a · 2017-07-18T13:24:50.000-07:00
diff --git a/lib/node_modules/@stdlib/repl/server/lib/context.js b/lib/node_modules/@stdlib/repl/server/lib/context.js
@@ -9,6 +9,7 @@ var deepGet = require( '@stdlib/utils/deep-get' );
 var help = require( './functions/help.js' );
 var example = require( './functions/example.js' );
 var namespace = require( './functions/namespace.js' );
+var alias2pkg = require( './functions/alias2pkg.js' );
 var NAMESPACE = require( './namespace.js' );
 
 
@@ -36,7 +37,8 @@ function extend( repl ) {
 	tmp = {
 		'help': help,
 		'example': example( repl ),
-		'namespace': namespace
+		'namespace': namespace,
+		'alias2pkg': alias2pkg
 	};
 	paths = [];
 	for ( i = 0; i < NAMESPACE.length; i++ ) {
diff --git a/lib/node_modules/@stdlib/repl/server/lib/functions/alias2pkg.js b/lib/node_modules/@stdlib/repl/server/lib/functions/alias2pkg.js
@@ -0,0 +1,45 @@
+'use strict';
+
+// MODULES //
+
+var NAMESPACE = require( './../namespace.js' );
+var logger = require( './../console.js' );
+
+
+// VARIABLES //
+
+var NO_PKG_TEXT = 'Unrecognized alias.';
+
+
+// MAIN //
+
+/**
+* Prints the package name corresponding to a provided alias.
+*
+* @private
+* @param {*} alias - variable alias or value
+*/
+function alias2pkg( alias ) {
+	var txt;
+	var i;
+
+	// Check if provided an alias or a known value reference...
+	for ( i = 0; i < NAMESPACE.length; i++ ) {
+		if (
+			alias === NAMESPACE[ i ].alias ||
+			alias === NAMESPACE[ i ].value
+		) {
+			txt = NAMESPACE[ i ].path;
+			break;
+		}
+	}
+	if ( txt === void 0 ) {
+		txt = NO_PKG_TEXT;
+	}
+	logger.log( txt );
+} // end FUNCTION alias2pkg()
+
+
+// EXPORTS //
+
+module.exports = alias2pkg;
