more tweaking...

Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>

ADVANCED.md

@@ -35,7 +35,9 @@ For basics see [README.md](./README.md)
 				- [Automatically defined values](#automatically-defined-values)
 				- [`<parser>.doc`](#parserdoc)
 				- [`<parser>.usage`](#parserusage)
+				- [`<parser>.packageJson`](#parserpackagejson)
 				- [`<parser>.version`](#parserversion)
+				- [`<parser>.author`](#parserauthor)
 				- [`<parser>.license`](#parserlicense)
 				- [`<parser>.examples`](#parserexamples)
 				- [`<parser>.footer`](#parserfooter)
@@ -460,21 +462,47 @@ Basic usage hint.
 Default value: `"$SCRIPTNAME [OPTIONS]"`
 
 
+##### `<parser>.packageJson`
+
+The path to the metadata JSON file.
+
+    <spec>.packageJson = <string> | <function> | undefined
+
+If not set `package.json` will be searched for in the same directory as the 
+main script.
+
+Default value: `undefined`.
+
 ##### `<parser>.version`
+
 Version number.
 
     <spec>.usage = <string> | <function> | undefined
 
-If this is not defined `-version` will print `"0.0.0"`.
+If this is not defined it will be read from the project metadata, if none is 
+found `"0.0.0"` will be printed by `-version`.
 
 Default value: `undefined`
 
 
+##### `<parser>.author`
+
+Author name/contacts.
+
+    <spec>.author = <string> | <function> | undefined
+
+If not set project metadata is used, if found.
+
+Default value: `undefined`
+
 ##### `<parser>.license`
+
 Short license information.
 
     <spec>.usage = <string> | <function> | undefined
 
+If not set project metadata is used, if found.
+
 Default value: `undefined`
 
 

README.md

@@ -30,6 +30,7 @@ This code is an evolution of that parser.
 - Option/command value collection
 - Multiple option prefix support
 - Reasonable defaults:
+  - Metadata defaults to `package.json`
   - `-help` – generate and print help
   - `-version` – print version
   - `-quiet` – suppress printing
@@ -198,6 +199,11 @@ Metadata:
 	license: 'BSD-3-Clause',
 ```
 
+If not set, `.version`, `.author`, `.license` are acquired from `package.json` 
+located at the same path as the main script.  
+To explicitly set the path of the JSON file from which metadata is read set 
+`.packageJson`.
+
 These basic bits of metadata can be referenced in other `-help` sections, 
 for example:
 ```javascript

argv.js

@@ -137,7 +137,9 @@ function(attr, func){
 	return function(p){
 		try {
 			var res = require(p
-				|| this.packageJson
+				|| (typeof(this.packageJson) == 'function' ?
+					this.packageJson()
+					: this.packageJson)
 				|| path.dirname(
 						(require.main || {}).filename || '.')
 				   	+'/package.json')[attr]

package.json

@@ -1,6 +1,6 @@
 {
   "name": "ig-argv",
-  "version": "2.10.2",
+  "version": "2.10.3",
   "description": "simple argv parser",
   "main": "argv.js",
   "scripts": {