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<?php |
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declare(strict_types=1); |
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namespace Doctrine\Migrations\Version; |
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use Doctrine\Migrations\Exception\NoMigrationsFoundWithCriteria; |
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use Doctrine\Migrations\Exception\NoMigrationsToExecute; |
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use Doctrine\Migrations\Exception\UnknownMigrationVersion; |
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use Doctrine\Migrations\Metadata\Storage\MetadataStorage; |
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use function substr; |
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/** |
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* The DefaultAliasResolver class is responsible for resolving aliases like first, current, etc. to the actual version number. |
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* |
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* @internal |
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*/ |
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final class DefaultAliasResolver implements AliasResolver |
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{ |
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private const ALIAS_FIRST = 'first'; |
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private const ALIAS_CURRENT = 'current'; |
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private const ALIAS_PREV = 'prev'; |
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private const ALIAS_NEXT = 'next'; |
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private const ALIAS_LATEST = 'latest'; |
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/** @var MigrationPlanCalculator */ |
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private $migrationPlanCalculator; |
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/** @var MetadataStorage */ |
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private $metadataStorage; |
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/** @var MigrationStatusCalculator */ |
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private $migrationStatusCalculator; |
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public function __construct( |
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MigrationPlanCalculator $migrationPlanCalculator, |
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MetadataStorage $metadataStorage, |
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MigrationStatusCalculator $migrationStatusCalculator |
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) { |
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$this->migrationPlanCalculator = $migrationPlanCalculator; |
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$this->metadataStorage = $metadataStorage; |
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$this->migrationStatusCalculator = $migrationStatusCalculator; |
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} |
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/** |
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* Returns the version number from an alias. |
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* |
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* Supported aliases are: |
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* |
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* - first: The very first version before any migrations have been run. |
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* - current: The current version. |
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* - prev: The version prior to the current version. |
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* - next: The version following the current version. |
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* - latest: The latest available version. |
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* |
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* If an existing version number is specified, it is returned verbatimly. |
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* |
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* @throws NoMigrationsToExecute |
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* @throws UnknownMigrationVersion |
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* @throws NoMigrationsFoundWithCriteria |
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*/ |
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public function resolveVersionAlias(string $alias) : Version |
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{ |
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$availableMigrations = $this->migrationPlanCalculator->getMigrations(); |
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$executedMigrations = $this->metadataStorage->getExecutedMigrations(); |
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switch ($alias) { |
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case self::ALIAS_FIRST: |
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case '0': |
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return new Version('0'); |
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case self::ALIAS_CURRENT: |
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try { |
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return $executedMigrations->getLast()->getVersion(); |
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} catch (NoMigrationsFoundWithCriteria $e) { |
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return new Version('0'); |
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} |
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// no break because of return |
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case self::ALIAS_PREV: |
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try { |
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return $executedMigrations->getLast(-1)->getVersion(); |
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1 |
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} catch (NoMigrationsFoundWithCriteria $e) { |
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return new Version('0'); |
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} |
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// no break because of return |
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case self::ALIAS_NEXT: |
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$newMigrations = $this->migrationStatusCalculator->getNewMigrations(); |
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try { |
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return $newMigrations->getFirst()->getVersion(); |
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} catch (NoMigrationsFoundWithCriteria $e) { |
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throw NoMigrationsToExecute::new($e); |
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} |
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// no break because of return |
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case self::ALIAS_LATEST: |
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try { |
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return $availableMigrations->getLast()->getVersion(); |
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1 |
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} catch (NoMigrationsFoundWithCriteria $e) { |
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return $this->resolveVersionAlias(self::ALIAS_CURRENT); |
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} |
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// no break because of return |
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default: |
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if ($availableMigrations->hasMigration(new Version($alias))) { |
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return $availableMigrations->getMigration(new Version($alias))->getVersion(); |
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} |
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if (substr($alias, 0, 7) === self::ALIAS_CURRENT) { |
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$val = (int) substr($alias, 7); |
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$targetMigration = null; |
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if ($val > 0) { |
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$newMigrations = $this->migrationStatusCalculator->getNewMigrations(); |
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return $newMigrations->getFirst($val - 1)->getVersion(); |
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} |
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return $executedMigrations->getLast($val)->getVersion(); |
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} |
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} |
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throw UnknownMigrationVersion::new($alias); |
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} |
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} |
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doctrine /
migrations
This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently.
Both the
$myVarassignment in line 1 and the$higherassignment in line 2 are dead. The first because$myVaris never used and the second because$higheris always overwritten for every possible time line.