How to fix error of composer post-install-cmd script?

Question

I would like to use composer script to do some post installation such as copying files from bootstrap vendor folder to my web application public folder. I have a baby experience with PHP world and web application development.

I'm trying to learn doing this by following this tutorial

This is my directory structure*

This is my composer.json

{
    "name": "Composer Script",
    "description": "An example to demonstrate the use of Composer scripts",
    "version": "1.0.0",
    "require": {
        "twitter/bootstrap": ">=3.0"
    },

    "scripts": {
        "post-install-cmd": [
            "ComposerScript\\Installer::postInstall"
        ],
        "post-package-install": [
            "/var/www/test/composer-script/install.sh"
        ]
    }
}

This is ComposerScript\Installer.php

class Installer

    {
        public static function postInstall(Event $event)
        {
            $composer = $event->getComposer();
            // do stuff
        }

        public static function postPackageInstall(Event $event)
        {
            $installedPackage = $event->getOperation()->getPackage();
            // do stuff
        }

        public static function warmCache(Event $event)
        {
            // make cache toasty
        }
    }

After execute composer install I got this error

install.sh is empty at this moment

How to fix this error, and especially what is autoload?, I don't event know what keywords to search for please suggest me some reading.

Answer 1

Just in case someone stumbled again to this problem. Here is a spoon feed sample. :)

In a given scenario like this

We have to set on our composer.json to the ff. settings

"autoload": {
    "psr-0": {
        "ComposerScript\\Installer" : ""
    }
},

"scripts": {
    "post-package-update": [
        "ComposerScript\\Installer::postPackageUpdate"
    ]
}

Then the content of Installer.php is

namespace ComposerScript;

use Composer\Script\Event;

class Installer
{
    public static function postUpdate(Event $event)
    {
    $composer = $event->getComposer();
    // do stuff
    }

    public static function postPackageUpdate(Event $event)
    {
    $packageName = $event->getOperation()
        ->getPackage()
        ->getName();
    echo "$packageName\n";
    // do stuff
    }

    public static function warmCache(Event $event)
    {
    // make cache toasty
    }
}

Then executing php composer.phar update will work without warning.