silverstripe-framework/core/ManifestBuilder.php
Ingo Schommer a6d019bd76 MINOR Documentation
git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/sapphire/branches/2.4@104996 467b73ca-7a2a-4603-9d3b-597d59a354a9
2011-02-02 14:19:25 +13:00

606 lines
20 KiB
PHP

<?php
/**
* Define a constant for the name of the manifest file
*/
if(!defined('MANIFEST_FILE')) define("MANIFEST_FILE", TEMP_FOLDER . "/manifest-" . str_replace('.php','',basename($_SERVER['SCRIPT_FILENAME'])));
/**
* The ManifestBuilder class generates the manifest file and keeps it fresh.
*
* The manifest file is a PHP include that contains global variables that
* represent the collected contents of the application:
* - all classes ({@link __autoload()})
* - all templates ({@link SSViewer})
* - all _config.php files
*
* Traversing the filesystem to collect this information on everypage.
* This information is cached so that it need not be regenerated on every
* pageview.
*
* @see main.php, __autoload(), SSViewer, Requirements::themedCSS()
* @package sapphire
* @subpackage core
*/
class ManifestBuilder {
static $restrict_to_modules = array();
static $extendsArray = array();
static $classArray = array();
static $implementsArray = array();
/**
* @var array $ignore_files Full filenames (without directory-path) which
* should be ignored by the manifest.
*/
public static $ignore_files = array(
'main.php',
'cli-script.php',
'install.php',
'index.php',
);
/**
* @var array $ignore_folders Foldernames (without path) which
* should be ignored by the manifest.
*/
public static $ignore_folders = array(
'mysql',
'assets',
'shortstat',
'HTML',
);
/**
* Include the manifest, regenerating it if necessary
*/
static function include_manifest() {
if(isset($_REQUEST['usetestmanifest'])) {
self::load_test_manifest();
} else {
// The dev/build reference is some coupling but it solves an annoying bug
if(!file_exists(MANIFEST_FILE) || (filemtime(MANIFEST_FILE) < filemtime(BASE_PATH))
|| isset($_GET['flush']) || (isset($_REQUEST['url']) && ($_REQUEST['url'] == 'dev/build'
|| $_REQUEST['url'] == BASE_URL . '/dev/build'))) {
self::create_manifest_file();
}
require_once(MANIFEST_FILE);
}
}
/**
* Load a copy of the manifest with tests/ folders included.
* Only loads the ClassInfo and __autoload() globals; this assumes that _config.php files are already included.
*/
static function load_test_manifest() {
$testManifestFile = MANIFEST_FILE . '-test';
// The dev/build reference is some coupling but it solves an annoying bug
if(!file_exists($testManifestFile)
|| (filemtime($testManifestFile) < filemtime(BASE_PATH))
|| isset($_GET['flush'])) {
// Build the manifest, including the tests/ folders
$manifestInfo = self::get_manifest_info(BASE_PATH);
$manifest = self::generate_php_file($manifestInfo);
if($fh = fopen($testManifestFile, 'wb')) {
fwrite($fh, $manifest);
fclose($fh);
} else {
user_error("Cannot write manifest file! Check permissions of " . MANIFEST_FILE, E_USER_ERROR);
}
}
require($testManifestFile);
}
/**
* Loads all PHP class files - actually opening them and executing them.
*/
static function load_all_classes() {
global $_CLASS_MANIFEST;
foreach($_CLASS_MANIFEST as $classFile) require_once($classFile);
}
/**
* Generates a new manifest file and saves it to {@link MANIFEST_FILE}.
*/
static function create_manifest_file() {
// Build the manifest, ignoring the tests/ folders
$manifestInfo = self::get_manifest_info(BASE_PATH, array("tests"));
$manifest = self::generate_php_file($manifestInfo);
if($fh = fopen(MANIFEST_FILE, 'wb')) {
fwrite($fh, $manifest);
fclose($fh);
} else {
user_error("Cannot write manifest file! Check permissions of " . MANIFEST_FILE, E_USER_ERROR);
}
}
/**
* Turn an array produced by get_manifest_info() into the content of the manifest PHP include
*/
static function generate_php_file($manifestInfo) {
$output = "<?php\n";
foreach($manifestInfo['globals'] as $globalName => $globalVal) {
$output .= "global \$$globalName;\n\$$globalName = " . var_export($globalVal, true) . ";\n\n";
}
foreach($manifestInfo['require_once'] as $requireItem) {
$output .= 'require_once("' . addslashes($requireItem) . "\");\n";
}
return $output;
}
/**
* Parse the $manifestInfo array, updating the appropriate globals and loading the appropriate _config files.
*/
static function process_manifest($manifestInfo) {
foreach($manifestInfo['globals'] as $globalName => $globalVal) {
global $$globalName;
$$globalName = $globalVal;
}
foreach($manifestInfo['require_once'] as $requireItem) {
require_once("$requireItem");
}
}
/**
* Get themes from a particular directory.
*
* @param string $baseDir Optional: Absolute path to theme directory for testing e.g. "/Users/sharvey/Sites/test24/themes"
* @param boolean $includeSubThemes If set to TRUE, sub-themes such as "blackcandy_blog" are included too
* @return array Listing of theme directories
*/
public static function get_themes($baseDir = null, $includeSubThemes = false) {
// If no base directory specified, the default is the project root
if(!$baseDir) $baseDir = BASE_PATH . DIRECTORY_SEPARATOR . THEMES_DIR;
$themes = array();
if(!file_exists($baseDir)) return $themes;
$handle = opendir($baseDir);
if($handle) {
while(false !== ($file = readdir($handle))) {
$fullPath = $baseDir . DIRECTORY_SEPARATOR . $file;
if(strpos($file, '.') === false && is_dir($fullPath)) {
$include = $includeSubThemes ? true : false;
if(strpos($file, '_') === false) {
$include = true;
}
if($include) $themes[$file] = $file;
}
}
closedir($handle);
}
return $themes;
}
/**
* Return an array containing information for the manifest
* @param $baseDir The root directory to analyse
* @param $excludedFolders An array folder names to exclude. These don't care about where the
* folder appears in the hierarchy, so be careful
*/
static function get_manifest_info($baseDir, $excludedFolders = array()) {
// locate and include the exclude files
$topLevel = scandir($baseDir);
foreach($topLevel as $file) {
if($file[0] == '.') continue
$fullPath = '';
$fullPath = $baseDir . '/' . $file;
if(@is_dir($fullPath . '/') && file_exists($fullPath . '/_exclude.php')) {
require_once($fullPath . '/_exclude.php');
}
}
// Project - used to give precedence to template files
$project = null;
// Class, CSS, template manifest
$allPhpFiles = array();
$templateManifest = array();
$cssManifest = array();
if(is_array(self::$restrict_to_modules) && count(self::$restrict_to_modules)) {
// $restrict_to_modules is set, so we include only those specified
// modules
foreach(self::$restrict_to_modules as $module)
ManifestBuilder::get_all_php_files($baseDir . '/' . $module, $excludedFolders, $allPhpFiles);
} else {
// Include all directories which have an _config.php file but don't
// have an _manifest_exclude file
$topLevel = scandir($baseDir);
foreach($topLevel as $filename) {
if($filename[0] == '.') continue;
if($filename == 'themes') continue;
if($filename == 'assets') continue;
if(in_array($filename, $excludedFolders)) continue;
if(@is_dir("$baseDir/$filename") &&
file_exists("$baseDir/$filename/_config.php") &&
!file_exists("$baseDir/$filename/_manifest_exclude")) {
// Get classes, templates, and CSS files
ManifestBuilder::get_all_php_files("$baseDir/$filename", $excludedFolders, $allPhpFiles);
ManifestBuilder::getTemplateManifest($baseDir, $filename, $excludedFolders, $templateManifest, $cssManifest);
// List the _config.php files
$manifestInfo["require_once"][] = "$baseDir/$filename/_config.php";
// Find the $project variable in the relevant config file without having to execute the config file
if(preg_match("/\\\$project\s*=\s*[^\n\r]+[\n\r]/", file_get_contents("$baseDir/$filename/_config.php"), $parts)) {
eval($parts[0]);
}
}
}
}
// Get themes
if(file_exists("$baseDir/themes")) {
$themeDirs = self::get_themes("$baseDir/themes", true);
foreach($themeDirs as $themeDir) {
$themeName = strtok($themeDir, '_');
ManifestBuilder::getTemplateManifest($baseDir, "themes/$themeDir", $excludedFolders, $templateManifest, $cssManifest, $themeName);
}
}
// Build class-info array from class manifest
$allClasses = ManifestBuilder::allClasses($allPhpFiles);
// Pull the class filenames out
$classManifest = $allClasses['file'];
unset($allClasses['file']);
// Ensure that any custom templates get favoured
if(!$project) user_error("\$project isn't set", E_USER_WARNING);
else if(!file_exists("$baseDir/$project")) user_error("\$project is set to '$project' but no such folder exists.", E_USER_WARNING);
else ManifestBuilder::getTemplateManifest($baseDir, $project, $excludedFolders, $templateManifest, $cssManifest);
$manifestInfo["globals"]["_CLASS_MANIFEST"] = $classManifest;
$manifestInfo["globals"]["_ALL_CLASSES"] = $allClasses;
$manifestInfo["globals"]["_TEMPLATE_MANIFEST"] = $templateManifest;
$manifestInfo["globals"]["_CSS_MANIFEST"] = $cssManifest;
return $manifestInfo;
}
/**
* Generates a list of all the PHP files that should be analysed by the manifest builder.
*
* @param string $folder The folder to traverse (recursively)
* @param array $classMap The already built class map
*/
private static function get_all_php_files($folder, $excludedFolders, &$allPhpFiles) {
$items = scandir($folder);
if($items) foreach($items as $item) {
// Skip some specific PHP files
if(in_array($item, self::$ignore_files)) continue;
// ignore hidden files and folders
if(substr($item,0,1) == '.') continue;
// ignore files without php-extension
if(substr($item,-4) != '.php' && !@is_dir("$folder/$item")) continue;
// ignore files and folders with underscore-prefix
if(substr($item,0,1) == '_') continue;
// ignore certain directories
if(@is_dir("$folder/$item") && in_array($item, self::$ignore_folders)) continue;
// ignore directories with _manifest_exlude file
if(@is_dir("$folder/$item") && file_exists("$folder/$item/_manifest_exclude")) continue;
// i18n: ignore language files (loaded on demand)
if($item == 'lang' && @is_dir("$folder/$item") && ereg_replace("/[^/]+/\\.\\.","",$folder.'/..') == Director::baseFolder()) continue;
if(@is_dir("$folder/$item")) {
// Folder exclusion - used to skip over tests/ folders
if(in_array($item, $excludedFolders)) continue;
// recurse into directories (if not in $ignore_folders)
ManifestBuilder::get_all_php_files("$folder/$item", $excludedFolders, $allPhpFiles);
} else {
$allPhpFiles[] = "$folder/$item";
}
}
}
/**
* Generates the template manifest - a list of all the .SS files in the
* application
*/
private static function getTemplateManifest($baseDir, $folder, $excludedFolders, &$templateManifest, &$cssManifest, $themeName = null) {
$items = scandir("$baseDir/$folder");
if($items) foreach($items as $item) {
if(substr($item,0,1) == '.') continue;
if(substr($item,-3) == '.ss') {
$templateName = substr($item, 0, -3);
$templateType = substr($folder,strrpos($folder,'/')+1);
if($templateType == "templates") $templateType = "main";
if($themeName) {
$templateManifest[$templateName]['themes'][$themeName][$templateType] = "$baseDir/$folder/$item";
} else {
$templateManifest[$templateName][$templateType] = "$baseDir/$folder/$item";
}
} else if(substr($item,-4) == '.css') {
$cssName = substr($item, 0, -4);
// Debug::message($item);
if($themeName) {
$cssManifest[$cssName]['themes'][$themeName] = "$folder/$item";
} else {
$cssManifest[$cssName]['unthemed'] = "$folder/$item";
}
} else if(@is_dir("$baseDir/$folder/$item")) {
// Folder exclusion - used to skip over tests/ folders
if(in_array($item, $excludedFolders)) continue;
ManifestBuilder::getTemplateManifest($baseDir, "$folder/$item", $excludedFolders, $templateManifest, $cssManifest, $themeName);
}
}
}
/**
* Include everything, so that actually *all* classes are available and
* build a map of classes and their subclasses
*
* @param $classManifest An array of all Sapphire classes; keys are class names and values are filenames
*
* @return array Returns an array that holds all class relevant
* information.
*/
private static function allClasses($classManifest) {
self::$classArray = array();
self::$extendsArray = array();
self::$implementsArray = array();
// Include everything, so we actually have *all* classes
foreach($classManifest as $file) {
$b = basename($file);
if($b != 'cli-script.php' && $b != 'main.php')
self::parse_file($file);
}
$allClasses["parents"] = self::find_parents();
$allClasses["children"] = self::find_children();
$allClasses["implementors"] = self::$implementsArray;
foreach(self::$classArray as $class => $info) {
$allClasses['exists'][$class] = $class;
// Class names are converted to lowercase for lookup to adhere to PHP's case-insensitive
// way of dealing with them.
$allClasses['file'][strtolower($class)] = $info['file'];
}
// Build a map of classes and their subclasses
$_classes = get_declared_classes();
foreach($_classes as $class) {
$allClasses['exists'][$class] = $class;
foreach($_classes as $subclass) {
if(is_subclass_of($class, $subclass)) $allClasses['parents'][$class][$subclass] = $subclass;
if(is_subclass_of($subclass, $class)) $allClasses['children'][$class][$subclass] = $subclass;
}
}
return $allClasses;
}
/**
* Parses a php file and adds any class or interface information into self::$classArray
*
* @param string $filename
*/
private static function parse_file($filename) {
$file = file_get_contents($filename);
$implements = "";
$extends = "";
$class="";
if($file === null) user_error("ManifestBuilder::parse_file(): Couldn't open $filename", E_USER_ERROR);
if(!$file) return;
// We cache the parse results of each file, since only a few files will have changed between flushings
// And, although it's accurate, TokenisedRegularExpression isn't particularly fast.
// We use an MD5 of the file as a part of the cache key because using datetime caused problems when users
// were upgrading their sites
$fileMD5 = md5($file);
$parseCacheFile = TEMP_FOLDER . "/manifestClassParse-" . str_replace(array("/", ":", "\\", "."), "_", basename($filename)) . "-$fileMD5";
if(file_exists($parseCacheFile)) {
include($parseCacheFile);
// Check for a bad cache file
if(!isset($classes) || !isset($interfaces) || !is_array($classes) || !is_array($interfaces)) {
unset($classes);
unset($interfaces);
}
}
// Either the parseCacheFile doesn't exist, or its bad
if(!isset($classes)) {
$tokens = token_get_all($file);
$classes = (array)self::getClassDefParser()->findAll($tokens);
$interfaces = (array)self::getInterfaceDefParser()->findAll($tokens);
$cacheContent = '<?php
$classes = ' . var_export($classes,true) . ';
$interfaces = ' . var_export($interfaces,true) . ';';
if($fh = fopen($parseCacheFile, 'wb')) {
fwrite($fh, $cacheContent);
fclose($fh);
}
}
foreach($classes as $class) {
$className = $class['className'];
unset($class['className']);
$class['file'] = $filename;
if(!isset($class['extends'])) $class['extends'] = null;
if($class['extends']) self::$extendsArray[$class['extends']][$className] = $className;
if(isset($class['interfaces'])) foreach($class['interfaces'] as $interface) {
self::$implementsArray[$interface][$className] = $className;
}
if(isset(self::$classArray[$className])) {
$file1 = self::$classArray[$className]['file'];
$file2 = $class['file'];
user_error("There are two files both containing the same class: '$file1' and " .
"'$file2'. This might mean that the wrong code is being used.", E_USER_WARNING);
}
self::$classArray[$className] = $class;
}
foreach($interfaces as $interface) {
$className = $interface['interfaceName'];
unset($interface['interfaceName']);
$interface['file'] = $filename;
if(!isset($interface['extends'])) $interface['extends'] = null;
if(isset(self::$classArray[$className])) {
$file1 = self::$classArray[$className]['file'];
$file2 = $interface[$className];
user_error("There are two files both containing the same class: '$file1' and " .
"'$file2'. This might mean that the wrong code is being used.", E_USER_WARNING);
}
self::$classArray[$className] = $interface;
}
}
/**
* Returns a {@link TokenisedRegularExpression} object that will parse class definitions
* @return TokenisedRegularExpression
*/
public static function getClassDefParser() {
require_once('core/TokenisedRegularExpression.php');
return new TokenisedRegularExpression(array(
0 => T_CLASS,
1 => T_WHITESPACE,
2 => array(T_STRING, 'can_jump_to' => array(7, 14), 'save_to' => 'className'),
3 => T_WHITESPACE,
4 => T_EXTENDS,
5 => T_WHITESPACE,
6 => array(T_STRING, 'save_to' => 'extends', 'can_jump_to' => 14),
7 => T_WHITESPACE,
8 => T_IMPLEMENTS,
9 => T_WHITESPACE,
10 => array(T_STRING, 'can_jump_to' => 14, 'save_to' => 'interfaces[]'),
11 => array(T_WHITESPACE, 'optional' => true),
12 => array(',', 'can_jump_to' => 10),
13 => array(T_WHITESPACE, 'can_jump_to' => 10),
14 => array(T_WHITESPACE, 'optional' => true),
15 => '{',
));
}
/**
* Returns a {@link TokenisedRegularExpression} object that will parse class definitions
* @return TokenisedRegularExpression
*/
public static function getInterfaceDefParser() {
require_once('core/TokenisedRegularExpression.php');
return new TokenisedRegularExpression(array(
0 => T_INTERFACE,
1 => T_WHITESPACE,
2 => array(T_STRING, 'can_jump_to' => 7, 'save_to' => 'interfaceName'),
3 => T_WHITESPACE,
4 => T_EXTENDS,
5 => T_WHITESPACE,
6 => array(T_STRING, 'save_to' => 'extends'),
7 => array(T_WHITESPACE, 'optional' => true),
8 => '{',
));
}
/**
* Moves through self::$classArray and creates an array containing parent data
*
* @return array
*/
private static function find_parents() {
$parentArray = array();
foreach(self::$classArray as $class => $info) {
$extendArray = array();
$parent = $info["extends"];
while($parent) {
$extendArray[$parent] = $parent;
$parent = isset(self::$classArray[$parent]["extends"]) ? self::$classArray[$parent]["extends"] : null;
}
$parentArray[$class] = array_reverse($extendArray);
}
return $parentArray;
}
/**
* Iterates through self::$classArray and returns an array with any descendant data
*
* @return array
*/
private static function find_children() {
$childrenArray = array();
foreach(self::$extendsArray as $class => $children) {
$allChildren = $children;
foreach($children as $childName) {
$allChildren = array_merge($allChildren, self::up_children($childName));
}
$childrenArray[$class] = $allChildren;
}
return $childrenArray;
}
/**
* Helper function to find all children of give class
*
* @param string $class
* @return array
*/
private static function get_children($class) {
return isset(self::$extendsArray[$class]) ? self::$extendsArray[$class] : array();
}
/**
* Returns if the Manifest has been included
*
* @return Boolean
*/
static function has_been_included() {
global $_CLASS_MANIFEST, $_TEMPLATE_MANIFEST, $_CSS_MANIFEST, $_ALL_CLASSES;
return (bool)!(empty($_CLASS_MANIFEST) && empty($_TEMPLATE_MANIFEST) && empty($_CSS_MANIFEST) && empty($_ALL_CLASSES));
}
/**
* Returns a flat array with all children of a given class
*
* @param string $class
* @param array $results
*/
static function up_children($class) {
$children = self::get_Children($class);
$results = $children;
foreach($children as $className) {
$results = array_merge($results, self::up_children($className));
}
return $results;;
}
}