Added install callback to check the PHP version

.travis.yml

@@ -6,9 +6,10 @@ before_script:
   - echo "zend.enable_gc=off" >> ~/.phpenv/versions/$TRAVIS_PHP_VERSION/etc/php.ini
   - mkdir releases tests/.cache
   - sh -c "if [ '$TRAVIS_PHP_VERSION' = '5.5' ]; then composer install --dev --no-interaction; fi"
+  - sh -c "if [ '$TRAVIS_PHP_VERSION' = '5.5' ]; then scripts/installRunkit.sh; fi"
   - sh -c "if [ '$TRAVIS_PHP_VERSION' = '5.3' ]; then phpenv config-rm xdebug.ini; fi"
   - php -i
 script:
   - phpunit -c phpunit-$TRAVIS_PHP_VERSION.xml
 after_script:
-  - sh -c "if [ $TRAVIS_PHP_VERSION = '5.5' ]; then php vendor/bin/coveralls -v; fi"
+  - sh -c "if [ '$TRAVIS_PHP_VERSION' = '5.5' ]; then php vendor/bin/coveralls -v; fi"

build/addon.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<addon addon_id="s9e" title="s9e Media Pack" url="https://github.com/s9e/XenForoMediaBBCodes" version_id="20131030" version_string="20131030">
+<addon addon_id="s9e" title="s9e Media Pack" url="https://github.com/s9e/XenForoMediaBBCodes" version_id="20131030" version_string="20131030" install_callback_class="s9e_MediaBBCodes" install_callback_method="install">
   <bb_code_media_sites>
     <site media_site_id="bandcamp" site_title="Bandcamp" site_url="http://bandcamp.com/" match_is_regex="1" embed_html_callback_class="s9e_MediaBBCodes" embed_html_callback_method="embed" match_callback_class="s9e_MediaBBCodes" match_callback_method="matchBandcamp">
       <match_urls>!bandcamp\.com/album/.!

build/upload/library/s9e/MediaBBCodes.php

@@ -12,6 +12,14 @@ class s9e_MediaBBCodes
 	*/
 	public static $cacheDir;
 
+	public static function install()
+	{
+		if (version_compare(phpversion(), '5.3', '<'))
+		{
+			throw new RuntimeException('Requires PHP 5.3 or later');
+		}
+	}
+
 	public static function match($url, $regexps, $scrapes)
 	{
 		$vars = array();

scripts/build.php

@@ -30,6 +30,14 @@ class s9e_MediaBBCodes
 	*/
 	public static $cacheDir;
 
+	public static function install()
+	{
+		if (version_compare(phpversion(), '5.3', '<'))
+		{
+			throw new RuntimeException('Requires PHP 5.3 or later');
+		}
+	}
+
 	public static function match($url, $regexps, $scrapes)
 	{
 		$vars = array();
@@ -232,18 +240,28 @@ protected static function getNamedCaptures($string, $regexps)
 $dom = new DOMDocument('1.0', 'utf-8');
 $addon = $dom->appendChild($dom->createElement('addon'));
 
+// The version is simply the current UTC day, optionally followed by the first argument given to
+// this script
 $versionId = gmdate('Ymd');
-
 if (isset($_SERVER['argv'][1]))
 {
 	$versionId .= $_SERVER['argv'][1];
 }
 
-$addon->setAttribute('addon_id',       's9e');
-$addon->setAttribute('title',          's9e Media Pack');
-$addon->setAttribute('url',            'https://github.com/s9e/XenForoMediaBBCodes');
-$addon->setAttribute('version_id',     $versionId);
-$addon->setAttribute('version_string', $versionId);
+// Set the add-on informations
+$attributes = [
+	'addon_id'                => 's9e',
+	'title'                   => 's9e Media Pack',
+	'url'                     => 'https://github.com/s9e/XenForoMediaBBCodes',
+	'version_id'              => $versionId,
+	'version_string'          => $versionId,
+	'install_callback_class'  => 's9e_MediaBBCodes',
+	'install_callback_method' => 'install'
+];
+foreach ($attributes as $attrName => $attrValue)
+{
+	$addon->setAttribute($attrName, $attrValue);
+}
 
 $rows = [];
 $rows[] = '<tr>';

scripts/installRunkit.sh

@@ -0,0 +1,10 @@
+#!/bin/bash
+
+wget -O - https://codeload.github.com/php/pecl-php-runkit/tar.gz/master | tar xzf - -C/tmp && \
+cd /tmp/pecl-php-runkit-master                                                             && \
+phpize                                                                                     && \
+./configure --enable-runkit-modify --disable-runkit-super --disable-runkit-sandbox         && \
+make                                                                                       && \
+sudo make install                                                                          && \
+echo "extension=runkit.so"        >> ~/.phpenv/versions/$TRAVIS_PHP_VERSION/etc/php.ini    && \
+echo "runkit.internal_override=1" >> ~/.phpenv/versions/$TRAVIS_PHP_VERSION/etc/php.ini

tests/Test.php

@@ -18,7 +18,35 @@ public function testBuild()
 
 	public function testLint()
 	{
-		include __DIR__ . '/../build/upload/library/s9e/MediaBBCodes.php';
+		include_once __DIR__ . '/../build/upload/library/s9e/MediaBBCodes.php';
+	}
+
+	public function testInstall()
+	{
+		if (!class_exists('s9e_MediaBBCodes'))
+		{
+			include __DIR__ . '/../build/upload/library/s9e/MediaBBCodes.php';
+		}
+
+		s9e_MediaBBCodes::install();
+	}
+
+	/**
+	* @runInSeparateProcess
+	* @requires extension runkit
+	* @expectedException RuntimeException
+	* @expectedException RuntimeExceptionMessage Requires PHP 5.3 or later
+	*/
+	public function testInstallFailure()
+	{
+		if (!class_exists('s9e_MediaBBCodes'))
+		{
+			include __DIR__ . '/../build/upload/library/s9e/MediaBBCodes.php';
+		}
+
+		runkit_function_redefine('phpversion', '', "return '5.2.5';");
+
+		s9e_MediaBBCodes::install();
 	}
 
 	/**