Silex Skeleton installation

Silex Skeleton installation

#!/usr/bin/env php
<?php

define('ARG_NAME', 1);
define('ARG_VERSION', 2);
define('ARG_DESTINATION', 3);

installSkeleton($argv);


function installSkeleton($argv) {
    checkRequirements();
    checkOptions($argv);
    downloadFiles($argv);
}

function checkRequirements() {
    $extensionRequirements = array('zip');

    $missing = array();
    foreach ($extensionRequirements as $ext) {
        if (false === phpversion($ext)) {
            $missing[] = $ext;
        }
    }

    if (count($missing) > 0) {
        echo sprintf('This extensions are required : %s', implode(', ', $missing)), PHP_EOL;
        die;
    }
}

function checkOptions($argv) {
    if (count($argv) < 4) {
       usageHelp($argv);
        exit;
    }

    $version = $argv[ARG_VERSION];
    $destination = $argv[ARG_DESTINATION];

    if (file_exists($destination) && !is_dir($destination)) {
        echo 'Destination is not a folder', PHP_EOL;
        exit;
    }

    if (!file_exists($destination) && !mkdir($destination, 0777, true)) {
        echo 'Unable to create destination folder', PHP_EOL;
        exit;
    }
}

function downloadFiles($argv) {
    $version = $argv[ARG_VERSION];
    $destination = $argv[ARG_DESTINATION];

    $tmpFilename = sprintf('/tmp/skeleton-%s.zip', md5(time()));
    $url = sprintf('https://github.com/jdecool/SilexSkeleton/archive/%s.zip', $version);
    if (false === copy($url, $tmpFilename)) {
        echo sprintf('Unable to download project'), PHP_EOL;
        exit;
    }

    $archive = new ZipArchive();
    if (false === ($code = $archive->open($tmpFilename))) {
        echo sprintf('Unable to extract skeleton [%s]', $code), PHP_EOL;
        exit;
    }

    if (false === $archive->extractTo($destination)) {
        echo sprintf('Unable to extract archive to destination folder'), PHP_EOL;
        exit;
    }

    $archive->close();
}

function usageHelp($argv) {
    echo sprintf('%s [name] [version] [destination]', $argv[0]), PHP_EOL;
}