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| 1 | <?php |
| 2 | /** |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License as published by |
| 5 | * the Free Software Foundation; either version 2 of the License, or |
| 6 | * (at your option) any later version. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along |
| 14 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 16 | * http://www.gnu.org/copyleft/gpl.html |
| 17 | * |
| 18 | * @file |
| 19 | */ |
| 20 | |
| 21 | use Composer\Semver\Constraint\Constraint; |
| 22 | use Composer\Semver\VersionParser; |
| 23 | |
| 24 | /** |
| 25 | * Check whether extensions and their dependencies meet certain version requirements. |
| 26 | * |
| 27 | * @since 1.29 |
| 28 | * @ingroup ExtensionRegistry |
| 29 | * @author Legoktm |
| 30 | * @author Florian Schmidt |
| 31 | */ |
| 32 | class VersionChecker { |
| 33 | /** |
| 34 | * @var Constraint|bool representing MediaWiki core |
| 35 | */ |
| 36 | private $coreVersion = false; |
| 37 | |
| 38 | /** |
| 39 | * @var Constraint|bool representing the PHP engine |
| 40 | */ |
| 41 | private $phpVersion = false; |
| 42 | |
| 43 | /** |
| 44 | * @var string[] List of installed PHP extensions |
| 45 | */ |
| 46 | private $phpExtensions; |
| 47 | |
| 48 | /** |
| 49 | * @var bool[] List of provided abilities |
| 50 | */ |
| 51 | private $abilities; |
| 52 | |
| 53 | /** |
| 54 | * @var string[] List of provided ability errors |
| 55 | */ |
| 56 | private $abilityErrors; |
| 57 | |
| 58 | /** |
| 59 | * @var array Loaded extensions |
| 60 | */ |
| 61 | private $loaded = []; |
| 62 | |
| 63 | /** |
| 64 | * @var VersionParser |
| 65 | */ |
| 66 | private $versionParser; |
| 67 | |
| 68 | /** |
| 69 | * @param string $coreVersion Current version of core |
| 70 | * @param string $phpVersion Current PHP version |
| 71 | * @param string[] $phpExtensions List of installed PHP extensions |
| 72 | * @param bool[] $abilities List of provided abilities |
| 73 | * @param string[] $abilityErrors Error messages for the abilities |
| 74 | */ |
| 75 | public function __construct( |
| 76 | $coreVersion, $phpVersion, array $phpExtensions, |
| 77 | array $abilities = [], array $abilityErrors = [] |
| 78 | ) { |
| 79 | $this->versionParser = new VersionParser(); |
| 80 | $this->setCoreVersion( $coreVersion ); |
| 81 | $this->setPhpVersion( $phpVersion ); |
| 82 | $this->phpExtensions = $phpExtensions; |
| 83 | $this->abilities = $abilities; |
| 84 | $this->abilityErrors = $abilityErrors; |
| 85 | } |
| 86 | |
| 87 | /** |
| 88 | * Set an array with credits of all loaded extensions and skins. |
| 89 | * |
| 90 | * @param array $credits An array of installed extensions with credits of them |
| 91 | * @return VersionChecker $this |
| 92 | */ |
| 93 | public function setLoadedExtensionsAndSkins( array $credits ) { |
| 94 | $this->loaded = $credits; |
| 95 | |
| 96 | return $this; |
| 97 | } |
| 98 | |
| 99 | /** |
| 100 | * Set MediaWiki core version. |
| 101 | * |
| 102 | * @param string $coreVersion Current version of core |
| 103 | */ |
| 104 | private function setCoreVersion( $coreVersion ) { |
| 105 | try { |
| 106 | $this->coreVersion = new Constraint( |
| 107 | '==', |
| 108 | $this->versionParser->normalize( $coreVersion ) |
| 109 | ); |
| 110 | $this->coreVersion->setPrettyString( $coreVersion ); |
| 111 | } catch ( UnexpectedValueException $e ) { |
| 112 | // Non-parsable version, don't fatal. |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | /** |
| 117 | * @param string $phpVersion Current PHP version. Must be well-formed. |
| 118 | * @throws UnexpectedValueException |
| 119 | */ |
| 120 | private function setPhpVersion( $phpVersion ) { |
| 121 | // normalize to make this throw an exception if the version is invalid |
| 122 | $this->phpVersion = new Constraint( |
| 123 | '==', |
| 124 | $this->versionParser->normalize( $phpVersion ) |
| 125 | ); |
| 126 | $this->phpVersion->setPrettyString( $phpVersion ); |
| 127 | } |
| 128 | |
| 129 | /** |
| 130 | * Check all given dependencies if they are compatible with the named |
| 131 | * installed extensions in the $credits array. |
| 132 | * |
| 133 | * Example $extDependencies: |
| 134 | * { |
| 135 | * 'FooBar' => { |
| 136 | * 'MediaWiki' => '>= 1.25.0', |
| 137 | * 'platform': { |
| 138 | * 'php': '>= 7.0.0', |
| 139 | * 'ext-foo': '*', |
| 140 | * 'ability-bar': true |
| 141 | * }, |
| 142 | * 'extensions' => { |
| 143 | * 'FooBaz' => '>= 1.25.0' |
| 144 | * }, |
| 145 | * 'skins' => { |
| 146 | * 'BazBar' => '>= 1.0.0' |
| 147 | * } |
| 148 | * } |
| 149 | * } |
| 150 | * |
| 151 | * @param array $extDependencies All extensions that depend on other ones |
| 152 | * @return array[] List of errors |
| 153 | */ |
| 154 | public function checkArray( array $extDependencies ) { |
| 155 | $errors = []; |
| 156 | foreach ( $extDependencies as $extension => $dependencies ) { |
| 157 | foreach ( $dependencies as $dependencyType => $values ) { |
| 158 | switch ( $dependencyType ) { |
| 159 | case ExtensionRegistry::MEDIAWIKI_CORE: |
| 160 | $mwError = $this->handleDependency( |
| 161 | $this->coreVersion, |
| 162 | $values |
| 163 | ); |
| 164 | if ( $mwError !== false ) { |
| 165 | $errors[] = [ |
| 166 | 'msg' => |
| 167 | "{$extension} is not compatible with the current MediaWiki " |
| 168 | . "core (version {$this->coreVersion->getPrettyString()}), " |
| 169 | . "it requires: $values.", |
| 170 | 'type' => 'incompatible-core', |
| 171 | ]; |
| 172 | } |
| 173 | break; |
| 174 | case 'platform': |
| 175 | foreach ( $values as $dependency => $constraint ) { |
| 176 | if ( $dependency === 'php' ) { |
| 177 | // PHP version |
| 178 | $phpError = $this->handleDependency( |
| 179 | $this->phpVersion, |
| 180 | $constraint |
| 181 | ); |
| 182 | if ( $phpError !== false ) { |
| 183 | $errors[] = [ |
| 184 | 'msg' => |
| 185 | "{$extension} is not compatible with the current PHP " |
| 186 | . "version {$this->phpVersion->getPrettyString()}), " |
| 187 | . "it requires: $constraint.", |
| 188 | 'type' => 'incompatible-php', |
| 189 | ]; |
| 190 | } |
| 191 | } elseif ( substr( $dependency, 0, 4 ) === 'ext-' ) { |
| 192 | // PHP extensions |
| 193 | $phpExtension = substr( $dependency, 4 ); |
| 194 | if ( $constraint !== '*' ) { |
| 195 | throw new UnexpectedValueException( 'Version constraints for ' |
| 196 | . 'PHP extensions are not supported in ' . $extension ); |
| 197 | } |
| 198 | if ( !in_array( $phpExtension, $this->phpExtensions, true ) ) { |
| 199 | $errors[] = [ |
| 200 | 'msg' => |
| 201 | "{$extension} requires {$phpExtension} PHP extension " |
| 202 | . "to be installed.", |
| 203 | 'type' => 'missing-phpExtension', |
| 204 | 'missing' => $phpExtension, |
| 205 | ]; |
| 206 | } |
| 207 | } elseif ( substr( $dependency, 0, 8 ) === 'ability-' ) { |
| 208 | // Other abilities the environment might provide. |
| 209 | $ability = substr( $dependency, 8 ); |
| 210 | if ( !isset( $this->abilities[$ability] ) ) { |
| 211 | throw new UnexpectedValueException( 'Dependency type ' |
| 212 | . $dependency . ' unknown in ' . $extension ); |
| 213 | } |
| 214 | if ( !is_bool( $constraint ) ) { |
| 215 | throw new UnexpectedValueException( 'Only booleans are ' |
| 216 | . 'allowed to to indicate the presence of abilities ' |
| 217 | . 'in ' . $extension ); |
| 218 | } |
| 219 | |
| 220 | if ( $constraint && |
| 221 | $this->abilities[$ability] !== true |
| 222 | ) { |
| 223 | // add custom error message for missing ability if specified |
| 224 | $customMessage = ''; |
| 225 | if ( isset( $this->abilityErrors[$ability] ) ) { |
| 226 | $customMessage = ': ' . $this->abilityErrors[$ability]; |
| 227 | } |
| 228 | |
| 229 | $errors[] = [ |
| 230 | 'msg' => |
| 231 | "{$extension} requires \"{$ability}\" ability" |
| 232 | . $customMessage, |
| 233 | 'type' => 'missing-ability', |
| 234 | 'missing' => $ability, |
| 235 | ]; |
| 236 | } |
| 237 | } else { |
| 238 | // add other platform dependencies here |
| 239 | throw new UnexpectedValueException( 'Dependency type ' . $dependency . |
| 240 | ' unknown in ' . $extension ); |
| 241 | } |
| 242 | } |
| 243 | break; |
| 244 | case 'extensions': |
| 245 | case 'skins': |
| 246 | foreach ( $values as $dependency => $constraint ) { |
| 247 | $extError = $this->handleExtensionDependency( |
| 248 | $dependency, $constraint, $extension, $dependencyType |
| 249 | ); |
| 250 | if ( $extError !== false ) { |
| 251 | $errors[] = $extError; |
| 252 | } |
| 253 | } |
| 254 | break; |
| 255 | default: |
| 256 | throw new UnexpectedValueException( 'Dependency type ' . $dependencyType . |
| 257 | ' unknown in ' . $extension ); |
| 258 | } |
| 259 | } |
| 260 | } |
| 261 | |
| 262 | return $errors; |
| 263 | } |
| 264 | |
| 265 | /** |
| 266 | * Handle a simple dependency to MediaWiki core or PHP. See handleMediaWikiDependency and |
| 267 | * handlePhpDependency for details. |
| 268 | * |
| 269 | * @param Constraint|false $version The version installed |
| 270 | * @param string $constraint The required version constraint for this dependency |
| 271 | * @return bool false if no error, true else |
| 272 | */ |
| 273 | private function handleDependency( $version, $constraint ) { |
| 274 | if ( $version === false ) { |
| 275 | // Couldn't parse the version, so we can't check anything |
| 276 | return false; |
| 277 | } |
| 278 | |
| 279 | // if the installed and required version are compatible, return an empty array |
| 280 | if ( $this->versionParser->parseConstraints( $constraint ) |
| 281 | ->matches( $version ) ) { |
| 282 | return false; |
| 283 | } |
| 284 | |
| 285 | return true; |
| 286 | } |
| 287 | |
| 288 | /** |
| 289 | * Handle a dependency to another extension. |
| 290 | * |
| 291 | * @param string $dependencyName The name of the dependency |
| 292 | * @param string $constraint The required version constraint for this dependency |
| 293 | * @param string $checkedExt The Extension, which depends on this dependency |
| 294 | * @param string $type Either 'extensions' or 'skins' |
| 295 | * @return bool|array false for no errors, or an array of info |
| 296 | */ |
| 297 | private function handleExtensionDependency( $dependencyName, $constraint, $checkedExt, |
| 298 | $type |
| 299 | ) { |
| 300 | // Check if the dependency is even installed |
| 301 | if ( !isset( $this->loaded[$dependencyName] ) ) { |
| 302 | return [ |
| 303 | 'msg' => "{$checkedExt} requires {$dependencyName} to be installed.", |
| 304 | 'type' => "missing-$type", |
| 305 | 'missing' => $dependencyName, |
| 306 | ]; |
| 307 | } |
| 308 | if ( $constraint === '*' ) { |
| 309 | // short-circuit since any version is OK. |
| 310 | return false; |
| 311 | } |
| 312 | // Check if the dependency has specified a version |
| 313 | if ( !isset( $this->loaded[$dependencyName]['version'] ) ) { |
| 314 | $msg = "{$dependencyName} does not expose its version, but {$checkedExt}" |
| 315 | . " requires: {$constraint}."; |
| 316 | return [ |
| 317 | 'msg' => $msg, |
| 318 | 'type' => "incompatible-$type", |
| 319 | 'incompatible' => $checkedExt, |
| 320 | ]; |
| 321 | } else { |
| 322 | // Try to get a constraint for the dependency version |
| 323 | try { |
| 324 | $installedVersion = new Constraint( |
| 325 | '==', |
| 326 | $this->versionParser->normalize( $this->loaded[$dependencyName]['version'] ) |
| 327 | ); |
| 328 | } catch ( UnexpectedValueException $e ) { |
| 329 | // Non-parsable version, output an error message that the version |
| 330 | // string is invalid |
| 331 | return [ |
| 332 | 'msg' => "$dependencyName does not have a valid version string.", |
| 333 | 'type' => 'invalid-version', |
| 334 | ]; |
| 335 | } |
| 336 | // Check if the constraint actually matches... |
| 337 | if ( |
| 338 | !$this->versionParser->parseConstraints( $constraint )->matches( $installedVersion ) |
| 339 | ) { |
| 340 | $msg = "{$checkedExt} is not compatible with the current " |
| 341 | . "installed version of {$dependencyName} " |
| 342 | . "({$this->loaded[$dependencyName]['version']}), " |
| 343 | . "it requires: " . $constraint . '.'; |
| 344 | return [ |
| 345 | 'msg' => $msg, |
| 346 | 'type' => "incompatible-$type", |
| 347 | 'incompatible' => $checkedExt, |
| 348 | ]; |
| 349 | } |
| 350 | } |
| 351 | |
| 352 | return false; |
| 353 | } |
| 354 | } |