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VersionChecker.php
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VersionChecker.php
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<?php
/**
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
*/
namespace MediaWiki\Registration;
use Composer\Semver\Constraint\Constraint;
use Composer\Semver\VersionParser;
use UnexpectedValueException;
/**
* Check whether extensions and their dependencies meet certain version requirements.
*
* @since 1.29
* @ingroup ExtensionRegistry
* @author Legoktm
* @author Florian Schmidt
*/
class VersionChecker {
/**
* @var Constraint|bool representing MediaWiki core
*/
private $coreVersion = false;
/**
* @var Constraint|bool representing the PHP engine
*/
private $phpVersion = false;
/**
* @var string[] List of installed PHP extensions
*/
private $phpExtensions;
/**
* @var bool[] List of provided abilities
*/
private $abilities;
/**
* @var string[] List of provided ability errors
*/
private $abilityErrors;
/**
* @var array Loaded extensions
*/
private $loaded = [];
/**
* @var VersionParser
*/
private $versionParser;
/**
* @param string $coreVersion Current version of core
* @param string $phpVersion Current PHP version
* @param string[] $phpExtensions List of installed PHP extensions
* @param bool[] $abilities List of provided abilities
* @param string[] $abilityErrors Error messages for the abilities
*/
public function __construct(
$coreVersion, $phpVersion, array $phpExtensions,
array $abilities = [], array $abilityErrors = []
) {
$this->versionParser = new VersionParser();
$this->setCoreVersion( $coreVersion );
$this->setPhpVersion( $phpVersion );
$this->phpExtensions = $phpExtensions;
$this->abilities = $abilities;
$this->abilityErrors = $abilityErrors;
}
/**
* Set an array with credits of all loaded extensions and skins.
*
* @param array $credits An array of installed extensions with credits of them
*
* @return VersionChecker $this
*/
public function setLoadedExtensionsAndSkins( array $credits ) {
$this->loaded = $credits;
return $this;
}
/**
* Set MediaWiki core version.
*
* @param string $coreVersion Current version of core
*/
private function setCoreVersion( $coreVersion ) {
try {
$this->coreVersion = new Constraint(
'==',
$this->versionParser->normalize( $coreVersion )
);
$this->coreVersion->setPrettyString( $coreVersion );
} catch ( UnexpectedValueException $e ) {
// Non-parsable version, don't fatal.
}
}
/**
* @param string $phpVersion Current PHP version. Must be well-formed.
*
* @throws UnexpectedValueException
*/
private function setPhpVersion( $phpVersion ) {
// normalize to make this throw an exception if the version is invalid
$this->phpVersion = new Constraint(
'==',
$this->versionParser->normalize( $phpVersion )
);
$this->phpVersion->setPrettyString( $phpVersion );
}
/**
* Check all given dependencies if they are compatible with the named
* installed extensions in the $credits array.
*
* Example $extDependencies:
* {
* 'FooBar' => {
* 'MediaWiki' => '>= 1.25.0',
* 'platform': {
* 'php': '>= 7.0.0',
* 'ext-foo': '*',
* 'ability-bar': true
* },
* 'extensions' => {
* 'FooBaz' => '>= 1.25.0'
* },
* 'skins' => {
* 'BazBar' => '>= 1.0.0'
* }
* }
* }
*
* @param array $extDependencies All extensions that depend on other ones
*
* @return array[] List of errors
*/
public function checkArray( array $extDependencies ) {
$errors = [];
foreach ( $extDependencies as $extension => $dependencies ) {
foreach ( $dependencies as $dependencyType => $values ) {
switch ( $dependencyType ) {
case ExtensionRegistry::MEDIAWIKI_CORE:
$mwError = $this->handleDependency(
$this->coreVersion,
$values
);
if ( $mwError !== false ) {
$errors[] = [
'msg' =>
"{$extension} is not compatible with the current MediaWiki "
. "core (version {$this->coreVersion->getPrettyString()}), "
. "it requires: $values.",
'type' => 'incompatible-core',
];
}
break;
case 'platform':
foreach ( $values as $dependency => $constraint ) {
if ( $dependency === 'php' ) {
// PHP version
$phpError = $this->handleDependency(
$this->phpVersion,
$constraint
);
if ( $phpError !== false ) {
$errors[] = [
'msg' =>
"{$extension} is not compatible with the current PHP "
. "version {$this->phpVersion->getPrettyString()}), "
. "it requires: $constraint.",
'type' => 'incompatible-php',
];
}
} elseif ( substr( $dependency, 0, 4 ) === 'ext-' ) {
// PHP extensions
$phpExtension = substr( $dependency, 4 );
if ( $constraint !== '*' ) {
throw new UnexpectedValueException( 'Version constraints for '
. 'PHP extensions are not supported in ' . $extension );
}
if ( !in_array( $phpExtension, $this->phpExtensions, true ) ) {
$errors[] = [
'msg' =>
"{$extension} requires {$phpExtension} PHP extension "
. "to be installed.",
'type' => 'missing-phpExtension',
'missing' => $phpExtension,
];
}
} elseif ( substr( $dependency, 0, 8 ) === 'ability-' ) {
// Other abilities the environment might provide.
$ability = substr( $dependency, 8 );
if ( !isset( $this->abilities[$ability] ) ) {
throw new UnexpectedValueException( 'Dependency type '
. $dependency . ' unknown in ' . $extension );
}
if ( !is_bool( $constraint ) ) {
throw new UnexpectedValueException( 'Only booleans are '
. 'allowed to to indicate the presence of abilities '
. 'in ' . $extension );
}
if ( $constraint &&
$this->abilities[$ability] !== true
) {
// add custom error message for missing ability if specified
$customMessage = '';
if ( isset( $this->abilityErrors[$ability] ) ) {
$customMessage = ': ' . $this->abilityErrors[$ability];
}
$errors[] = [
'msg' =>
"{$extension} requires \"{$ability}\" ability"
. $customMessage,
'type' => 'missing-ability',
'missing' => $ability,
];
}
} else {
// add other platform dependencies here
throw new UnexpectedValueException( 'Dependency type ' . $dependency .
' unknown in ' . $extension );
}
}
break;
case 'extensions':
case 'skins':
foreach ( $values as $dependency => $constraint ) {
$extError = $this->handleExtensionDependency(
$dependency, $constraint, $extension, $dependencyType
);
if ( $extError !== false ) {
$errors[] = $extError;
}
}
break;
default:
throw new UnexpectedValueException( 'Dependency type ' . $dependencyType .
' unknown in ' . $extension );
}
}
}
return $errors;
}
/**
* Handle a simple dependency to MediaWiki core or PHP. See handleMediaWikiDependency and
* handlePhpDependency for details.
*
* @param Constraint|false $version The version installed
* @param string $constraint The required version constraint for this dependency
*
* @return bool false if no error, true else
*/
private function handleDependency( $version, $constraint ) {
if ( $version === false ) {
// Couldn't parse the version, so we can't check anything
return false;
}
// if the installed and required version are compatible, return an empty array
if ( $this->versionParser->parseConstraints( $constraint )
->matches( $version ) ) {
return false;
}
return true;
}
/**
* Handle a dependency to another extension.
*
* @param string $dependencyName The name of the dependency
* @param string $constraint The required version constraint for this dependency
* @param string $checkedExt The Extension, which depends on this dependency
* @param string $type Either 'extensions' or 'skins'
*
* @return bool|array false for no errors, or an array of info
*/
private function handleExtensionDependency( $dependencyName, $constraint, $checkedExt,
$type
) {
// Check if the dependency is even installed
if ( !isset( $this->loaded[$dependencyName] ) ) {
return [
'msg' => "{$checkedExt} requires {$dependencyName} to be installed.",
'type' => "missing-$type",
'missing' => $dependencyName,
];
}
if ( $constraint === '*' ) {
// short-circuit since any version is OK.
return false;
}
// Check if the dependency has specified a version
if ( !isset( $this->loaded[$dependencyName]['version'] ) ) {
$msg = "{$dependencyName} does not expose its version, but {$checkedExt}"
. " requires: {$constraint}.";
return [
'msg' => $msg,
'type' => "incompatible-$type",
'incompatible' => $checkedExt,
];
} else {
// Try to get a constraint for the dependency version
try {
$installedVersion = new Constraint(
'==',
$this->versionParser->normalize( $this->loaded[$dependencyName]['version'] )
);
} catch ( UnexpectedValueException $e ) {
// Non-parsable version, output an error message that the version
// string is invalid
return [
'msg' => "$dependencyName does not have a valid version string.",
'type' => 'invalid-version',
];
}
// Check if the constraint actually matches...
if (
!$this->versionParser->parseConstraints( $constraint )->matches( $installedVersion )
) {
$msg = "{$checkedExt} is not compatible with the current "
. "installed version of {$dependencyName} "
. "({$this->loaded[$dependencyName]['version']}), "
. "it requires: " . $constraint . '.';
return [
'msg' => $msg,
'type' => "incompatible-$type",
'incompatible' => $checkedExt,
];
}
}
return false;
}
}
/** @deprecated class alias since 1.43 */
class_alias( VersionChecker::class, 'VersionChecker' );

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