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| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * Base script for schema maintenance |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License along |
| 17 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 18 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 19 | * http://www.gnu.org/copyleft/gpl.html |
| 20 | * |
| 21 | * @file |
| 22 | * @ingroup Maintenance |
| 23 | */ |
| 24 | |
| 25 | use Doctrine\SqlFormatter\NullHighlighter; |
| 26 | use Doctrine\SqlFormatter\SqlFormatter; |
| 27 | use MediaWiki\DB\AbstractSchemaValidationError; |
| 28 | use MediaWiki\DB\AbstractSchemaValidator; |
| 29 | |
| 30 | require_once __DIR__ . '/../Maintenance.php'; |
| 31 | |
| 32 | abstract class SchemaMaintenance extends Maintenance { |
| 33 | public const SUPPORTED_PLATFORMS = [ |
| 34 | 'mysql', |
| 35 | 'sqlite', |
| 36 | 'postgres' |
| 37 | ]; |
| 38 | |
| 39 | /** |
| 40 | * Name of the script. |
| 41 | * @var string |
| 42 | */ |
| 43 | protected $scriptName; |
| 44 | |
| 45 | public function __construct() { |
| 46 | parent::__construct(); |
| 47 | |
| 48 | $types = implode( ', ', array_map( static function ( string $type ): string { |
| 49 | return "'$type'"; |
| 50 | }, self::SUPPORTED_PLATFORMS ) ); |
| 51 | |
| 52 | $this->addOption( |
| 53 | 'json', |
| 54 | 'Path to the json file. Default: tables.json', |
| 55 | false, |
| 56 | true |
| 57 | ); |
| 58 | $this->addOption( |
| 59 | 'sql', |
| 60 | 'Path to output. If --type=all is given, ' . |
| 61 | 'the output will be placed in a directory named after the dbms. ' . |
| 62 | 'For mysql, a directory will only be used if it already exists. Default: tables-generated.sql', |
| 63 | false, |
| 64 | true |
| 65 | ); |
| 66 | $this->addOption( |
| 67 | 'type', |
| 68 | "Can be either $types, or 'all'. Default: mysql", |
| 69 | false, |
| 70 | true |
| 71 | ); |
| 72 | $this->addOption( |
| 73 | 'validate', |
| 74 | 'Validate the schema instead of generating sql files.' |
| 75 | ); |
| 76 | } |
| 77 | |
| 78 | public function canExecuteWithoutLocalSettings(): bool { |
| 79 | return true; |
| 80 | } |
| 81 | |
| 82 | public function execute() { |
| 83 | global $IP; |
| 84 | |
| 85 | $platform = $this->getOption( 'type', 'mysql' ); |
| 86 | $jsonPath = $this->getOption( 'json', dirname( __DIR__ ) ); |
| 87 | |
| 88 | $installPath = $IP; |
| 89 | |
| 90 | // For windows |
| 91 | if ( DIRECTORY_SEPARATOR === '\\' ) { |
| 92 | $installPath = strtr( $installPath, '\\', '/' ); |
| 93 | $jsonPath = strtr( $jsonPath, '\\', '/' ); |
| 94 | } |
| 95 | |
| 96 | if ( $this->hasOption( 'validate' ) ) { |
| 97 | $this->getSchema( $jsonPath ); |
| 98 | |
| 99 | return; |
| 100 | } |
| 101 | |
| 102 | // Allow to specify a folder and use a default name |
| 103 | if ( is_dir( $jsonPath ) ) { |
| 104 | $jsonPath .= '/tables.json'; |
| 105 | } |
| 106 | |
| 107 | $relativeJsonPath = str_replace( |
| 108 | [ "$installPath/extensions/", "$installPath/" ], |
| 109 | '', |
| 110 | $jsonPath |
| 111 | ); |
| 112 | |
| 113 | if ( in_array( $platform, self::SUPPORTED_PLATFORMS, true ) ) { |
| 114 | $platforms = [ $platform ]; |
| 115 | } elseif ( $platform === 'all' ) { |
| 116 | $platforms = self::SUPPORTED_PLATFORMS; |
| 117 | } else { |
| 118 | $this->fatalError( "'$platform' is not a supported platform!" ); |
| 119 | } |
| 120 | |
| 121 | foreach ( $platforms as $platform ) { |
| 122 | $sqlPath = $this->getOption( 'sql', dirname( $jsonPath ) ); |
| 123 | |
| 124 | // MediaWiki, and some extensions place mysql .sql files in the directory root, instead of a dedicated |
| 125 | // sub directory. If mysql/ doesn't exist, assume that the .sql files should be in the directory root. |
| 126 | if ( $platform === 'mysql' && !is_dir( $sqlPath . '/mysql' ) ) { |
| 127 | // Allow to specify a folder and build the name from the json filename |
| 128 | if ( is_dir( $sqlPath ) ) { |
| 129 | $sqlPath = $this->getSqlPathWithFileName( $relativeJsonPath, $sqlPath ); |
| 130 | } |
| 131 | } else { |
| 132 | // Allow to specify a folder and build the name from the json filename |
| 133 | if ( is_dir( $sqlPath ) ) { |
| 134 | $sqlPath .= '/' . $platform; |
| 135 | $directory = $sqlPath; |
| 136 | $sqlPath = $this->getSqlPathWithFileName( $relativeJsonPath, $sqlPath ); |
| 137 | } elseif ( count( $platforms ) > 1 ) { |
| 138 | $directory = dirname( $sqlPath ) . '/' . $platform; |
| 139 | $sqlPath = $directory . '/' . pathinfo( $sqlPath, PATHINFO_FILENAME ) . '.sql'; |
| 140 | } else { |
| 141 | $directory = false; |
| 142 | } |
| 143 | |
| 144 | // The directory for the platform might not exist. |
| 145 | if ( $directory !== false && !is_dir( $directory ) |
| 146 | && !mkdir( $directory ) && !is_dir( $directory ) |
| 147 | ) { |
| 148 | $this->error( "Cannot create $directory for $platform" ); |
| 149 | |
| 150 | continue; |
| 151 | } |
| 152 | } |
| 153 | |
| 154 | $this->writeSchema( $platform, $jsonPath, $relativeJsonPath, $sqlPath ); |
| 155 | } |
| 156 | } |
| 157 | |
| 158 | /** |
| 159 | * Determine the name of the generated SQL file when only a directory has been provided to --sql. |
| 160 | * When --json is given tables.json, tables-generates.sql will be the name, otherwise it will be the name of the |
| 161 | * .json file, minus the extension. |
| 162 | * |
| 163 | * @param string $relativeJsonPath |
| 164 | * @param string $sqlPath |
| 165 | * @return string |
| 166 | */ |
| 167 | private function getSqlPathWithFileName( string $relativeJsonPath, string $sqlPath ): string { |
| 168 | $jsonFilename = pathinfo( $relativeJsonPath, PATHINFO_FILENAME ); |
| 169 | if ( str_starts_with( $jsonFilename, 'tables' ) ) { |
| 170 | $sqlFileName = $jsonFilename . '-generated.sql'; |
| 171 | } else { |
| 172 | $sqlFileName = $jsonFilename . '.sql'; |
| 173 | } |
| 174 | |
| 175 | return $sqlPath . '/' . $sqlFileName; |
| 176 | } |
| 177 | |
| 178 | private function writeSchema( |
| 179 | string $platform, |
| 180 | string $jsonPath, |
| 181 | string $relativeJsonPath, |
| 182 | string $sqlPath |
| 183 | ): void { |
| 184 | $abstractSchemaChange = $this->getSchema( $jsonPath ); |
| 185 | |
| 186 | $sql = |
| 187 | "-- This file is automatically generated using maintenance/$this->scriptName.\n" . |
| 188 | "-- Source: $relativeJsonPath\n" . |
| 189 | "-- Do not modify this file directly.\n" . |
| 190 | "-- See https://www.mediawiki.org/wiki/Manual:Schema_changes\n"; |
| 191 | |
| 192 | $sql .= $this->generateSchema( $platform, $abstractSchemaChange ); |
| 193 | |
| 194 | // Give a hint, if nothing changed |
| 195 | if ( is_readable( $sqlPath ) ) { |
| 196 | $oldSql = file_get_contents( $sqlPath ); |
| 197 | if ( $oldSql === $sql ) { |
| 198 | $this->output( "Schema change is unchanged.\n" ); |
| 199 | } |
| 200 | } |
| 201 | |
| 202 | file_put_contents( $sqlPath, $sql ); |
| 203 | $this->output( 'Schema change generated and written to ' . $sqlPath . "\n" ); |
| 204 | } |
| 205 | |
| 206 | abstract protected function generateSchema( string $platform, array $schema ): string; |
| 207 | |
| 208 | /** |
| 209 | * Takes the output of DoctrineSchemaBuilder::getSql() or |
| 210 | * DoctrineSchemaChangeBuilder::getSchemaChangeSql() and applies presentational changes. |
| 211 | * |
| 212 | * @param string $platform DB engine identifier |
| 213 | * @param array $sqlArray Array of SQL statements |
| 214 | * @return string |
| 215 | */ |
| 216 | protected function cleanupSqlArray( string $platform, array $sqlArray ): string { |
| 217 | if ( !$sqlArray ) { |
| 218 | return ''; |
| 219 | } |
| 220 | |
| 221 | // Temporary |
| 222 | $sql = implode( ";\n\n", $sqlArray ) . ';'; |
| 223 | $sql = ( new SqlFormatter( new NullHighlighter() ) )->format( $sql ); |
| 224 | |
| 225 | // Postgres hacks |
| 226 | if ( $platform === 'postgres' ) { |
| 227 | // FIXME: Fix a lot of weird formatting issues caused by |
| 228 | // presence of partial index's WHERE clause, this should probably |
| 229 | // be done in some better way, but for now this can work temporarily |
| 230 | $sql = str_replace( |
| 231 | [ "WHERE\n ", "\n /*_*/\n ", " ", " );", "KEY(\n " ], |
| 232 | [ "WHERE", ' ', " ", ');', "KEY(\n " ], |
| 233 | $sql |
| 234 | ); |
| 235 | } |
| 236 | |
| 237 | // Temporary fixes until the linting issues are resolved upstream. |
| 238 | // https://github.com/doctrine/sql-formatter/issues/53 |
| 239 | |
| 240 | $sql = preg_replace( "!\s+/\*_\*/\s+!", " /*_*/", $sql ); |
| 241 | $sql = preg_replace( |
| 242 | '!\s+/\*\$wgDBTableOptions\*/\s+;!', |
| 243 | ' /*$wgDBTableOptions*/;', |
| 244 | $sql |
| 245 | ); |
| 246 | |
| 247 | $sql = str_replace( "; CREATE ", ";\n\nCREATE ", $sql ); |
| 248 | $sql = str_replace( ";\n\nCREATE TABLE ", ";\n\n\nCREATE TABLE ", $sql ); |
| 249 | $sql = preg_replace( '/^(CREATE|DROP|ALTER)\s+(TABLE|VIEW|INDEX)\s+/m', '$1 $2 ', $sql ); |
| 250 | $sql = preg_replace( '/(?<!\s|;)\s+(ADD|DROP|ALTER|MODIFY|CHANGE|RENAME)\s+/', "\n \$1 ", $sql ); |
| 251 | |
| 252 | $sql = str_replace( "; ", ";\n", $sql ); |
| 253 | |
| 254 | if ( !str_ends_with( $sql, "\n" ) ) { |
| 255 | $sql .= "\n"; |
| 256 | } |
| 257 | |
| 258 | // Sqlite hacks |
| 259 | if ( $platform === 'sqlite' ) { |
| 260 | // Doctrine prepends __temp__ to the table name and we set the table with the schema prefix causing invalid |
| 261 | // sqlite. |
| 262 | $sql = preg_replace( '/__temp__\s*\/\*_\*\//', '/*_*/__temp__', $sql ); |
| 263 | } |
| 264 | |
| 265 | return $sql; |
| 266 | } |
| 267 | |
| 268 | /** |
| 269 | * Fetches the abstract schema. |
| 270 | * |
| 271 | * @param string $jsonPath |
| 272 | * @return array |
| 273 | */ |
| 274 | private function getSchema( string $jsonPath ): array { |
| 275 | $json = file_get_contents( $jsonPath ); |
| 276 | |
| 277 | if ( !$json ) { |
| 278 | $this->fatalError( |
| 279 | "'$jsonPath' does not exist!\n" |
| 280 | ); |
| 281 | } |
| 282 | |
| 283 | $abstractSchema = json_decode( $json, true ); |
| 284 | |
| 285 | if ( json_last_error() !== JSON_ERROR_NONE ) { |
| 286 | $this->fatalError( |
| 287 | "'$jsonPath' seems to be invalid json. Check the syntax and try again!\n" . json_last_error_msg() |
| 288 | ); |
| 289 | } |
| 290 | |
| 291 | $validator = new AbstractSchemaValidator( function ( string $msg ): void { |
| 292 | $this->fatalError( $msg ); |
| 293 | } ); |
| 294 | try { |
| 295 | $validator->validate( $jsonPath ); |
| 296 | } catch ( AbstractSchemaValidationError $e ) { |
| 297 | $this->fatalError( $e->getMessage() ); |
| 298 | } |
| 299 | |
| 300 | return $abstractSchema; |
| 301 | } |
| 302 | } |