Initial Commit ...

Node/x-arg.parser.js

@@ -0,0 +1,91 @@
+/**
+ * XArgs Parser Module ...
+ * a module for parsing args in node js cli apps ...
+ * 
+ * Maintainer
+ * 
+ * Hadi Khazaee Asl <https://saherelm.ir> (hadi_khazaee_asl@yahoo.com)
+ */
+
+//
+//#region Variable/Constants ...
+const ARGUMENT_SEPARATION_REGEX = /([^=\s]+)[=\ ]?\s*(.*)/;
+//#endregion
+
+//
+//#region Actions ...
+function parseArgs(argv) {
+    //
+    // Removing node/bin and called script name
+    argv = argv.slice(2);
+
+    //
+    const result = {};
+    let argName;
+    let argValue;
+
+    //
+    if (
+        argv === null 
+        || argv === undefined
+        || argv.length === 0
+    ) {
+        return result;
+    }
+
+    //
+    const argString = argv.join(" ");
+    let matches = argString
+        .match(ARGUMENT_SEPARATION_REGEX);
+    matches.splice(0, 1);
+    matches = matches
+        .filter(m => m !== undefined && m !== "");
+
+    //
+    matches.forEach(arg => {
+        //
+        // Separate argument for a key/value return
+        arg = arg.match(ARGUMENT_SEPARATION_REGEX);
+        arg.splice(0, 1);
+
+        //
+        // Retrieve the argument name
+        argName = arg[0];
+
+        //
+        // Remove "--" or "-"
+        if (argName.indexOf('-') === 0) {
+            //
+            argName = argName
+                .slice(
+                    argName
+                        .slice(0, 2)
+                        .lastIndexOf('-') + 1
+            );
+        }
+
+        //
+        // Parse argument value or set it to `true` if empty
+        argValue =
+            arg[1] !== ''
+            ? parseFloat(arg[1])
+                .toString() === arg[1]
+                ? +arg[1]
+                : arg[1]
+            : true;
+        
+        //
+        result[argName] = argValue;
+    });
+
+    //
+    return result;
+}
+//#endregion
+
+//
+//#region Exports ...
+module.exports = {
+    parseArgs
+};
+//#endregion