This script uses the `plugins/fetch.json` cordova file to batch install all the required plugins at once.

cordova-batch-install-plugins.sh

#!/usr/bin/env node

//this hook installs all your plugins

// add your plugins to this list--either 
// the identifier, the filesystem location 
// or the URL
var plugins = require('./plugins/fetch.json');
var pluginlist = [];

for( var prop in plugins) {
	if(plugins[prop].source.id){
		pluginlist.push(plugins[prop].source.id);
	}
	else {
		pluginlist.push(plugins[prop].source.url);	
	}
}

// no need to configure below

var sys = require('sys')
var exec = require('child_process').exec;

function puts(error, stdout, stderr) {
  sys.puts(stdout);
}

pluginlist.forEach(function(plug) {
   exec("cordova plugin add " + plug, puts);
});