argHandle

Library to parse commandline-args and options.

Usage

Install

npm install arghandle

Implementation

Require this module into your project

var arghandle = require('arghandle'),
    handle = new arghandle();

    handle.process();

You can test this by running

node yourscript.js --help

This is a reserved keyword. This will show all the handelers that have been defined

Defining custom argument handlers

A handler object should be designed like the following:

{
    keys: ['--port', '-P'], // e.g. node script.js [--port|-P] 8080
    method: function (self) {
        console.log(self.getNext()); // 8080
    },
    description: 'Set application listning port'
}

Their are three methods to append your argument handlers.

Initially declaring the options

var handle = new arghandle({
    // This defines the start point for arguments to get processed
    startIndex: 5,
    // This defines the custom argument handlers
    definedArgs: [
        {
            keys: ['--yes-debug', '-D'],
            method: function (self) {
                appConfig.debug = true;
            },
            description: 'Set application to debug'
        },
        {
            keys: ['--port', '-P'],
            method: function (self) {
                appConfig.port = self.getNext();
            },
            description: 'Set application listning port'
        }
    ],
    // This defines arguments passed by the command line
    argv: process.argv
}); 

Concating an array of handlers

var appConfig = {
    debug: false,
    port: 8080,
    hostname: 'localhost'
};

handle.concat([
    {
        keys: ['--debug', '-D'],
        method: function (self) {
            appConfig.debug = true;
        },
        description: 'Set application to debug'
    },
    {
        keys: ['--port', '-P'],
        method: function (self) {
            appConfig.port = self.getNext();
        },
        description: 'Set application listning port'
    }
]);

Appending a single handler

handle.push({
    keys: ['--hostname', '-H'],
    method: function (self) {
        appConfig.hostname = self.getNext();
    },
    description: 'Set application listning hostname'
});

Defining the start position for arguments

This is declared in the initial method. This is done as follows...

var handle = new arghandle({
    startIndex: 2
});

Processing the arguments

This is done by calling the method as follows...

handle.process(process.argv); // if argv is not declared in the initial method
handle.process(); // if argv was included in the initial method

This will return false if an undefined argument is sent