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<?php |
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/** |
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* This file is part of the Composer Merge plugin. |
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* |
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* Copyright (C) 2015 Bryan Davis, Wikimedia Foundation, and contributors |
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* |
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* This software may be modified and distributed under the terms of the MIT |
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* license. See the LICENSE file for details. |
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*/ |
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namespace Wikimedia\Composer\Merge; |
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use Composer\Package\BasePackage; |
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use Composer\Package\Version\VersionParser; |
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/** |
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* Adapted from Composer's RootPackageLoader::extractStabilityFlags |
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* @author Bryan Davis <[email protected]> |
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*/ |
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class StabilityFlags |
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{ |
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/** |
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* @var array Current package name => stability mappings |
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*/ |
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protected $stabilityFlags; |
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/** |
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* @var int Current default minimum stability |
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*/ |
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protected $minimumStability; |
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/** |
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* @var string Regex to extract an explict stability flag (eg '@dev') |
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*/ |
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protected $explicitStabilityRe; |
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/** |
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* @param array $stabilityFlags Current package name => stability mappings |
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* @param int $minimumStability Current default minimum stability |
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*/ |
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public function __construct( |
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array $stabilityFlags = array(), |
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$minimumStability = BasePackage::STABILITY_STABLE |
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) { |
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$this->stabilityFlags = $stabilityFlags; |
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$this->minimumStability = $this->getStabilityInt($minimumStability); |
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$this->explicitStabilityRe = '/^[^@]*?@(' . |
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implode('|', array_keys(BasePackage::$stabilities)) . |
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')$/i'; |
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} |
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/** |
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* Get the stability value for a given string. |
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* |
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* @param string $name Stability name |
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* @return int Stability value |
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*/ |
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protected function getStabilityInt($name) |
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{ |
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$name = VersionParser::normalizeStability($name); |
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return isset(BasePackage::$stabilities[$name]) ? |
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BasePackage::$stabilities[$name] : |
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BasePackage::STABILITY_STABLE; |
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} |
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/** |
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* Extract and merge stability flags from the given collection of |
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* requires with another collection of stability flags. |
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* |
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* @param array $requires New package name => link mappings |
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* @return array Unified package name => stability mappings |
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*/ |
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public function extractAll(array $requires) |
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{ |
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$flags = array(); |
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foreach ($requires as $name => $link) { |
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$name = strtolower($name); |
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$version = $link->getPrettyConstraint(); |
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$stability = $this->getExplicitStability($version); |
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if ($stability === null) { |
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$stability = $this->getParsedStability($version); |
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} |
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$flags[$name] = max($stability, $this->getCurrentStability($name)); |
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} |
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// Filter out null stability values |
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return array_filter($flags, function ($v) { |
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return $v !== null; |
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}); |
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} |
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/** |
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* Extract the most unstable explicit stability (eg '@dev') from a version |
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* specification. |
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* |
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* @param string $version |
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* @return int|null Stability or null if no explict stability found |
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*/ |
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protected function getExplicitStability($version) |
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{ |
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$found = null; |
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$constraints = $this->splitConstraints($version); |
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foreach ($constraints as $constraint) { |
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if (preg_match($this->explicitStabilityRe, $constraint, $match)) { |
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$stability = $this->getStabilityInt($match[1]); |
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$found = max($stability, $found); |
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} |
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} |
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return $found; |
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} |
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/** |
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* Split a version specification into a list of version constraints. |
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* |
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* @param string $version |
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* @return array |
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*/ |
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protected function splitConstraints($version) |
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{ |
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$found = array(); |
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$orConstraints = preg_split('/\s*\|\|?\s*/', trim($version)); |
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foreach ($orConstraints as $constraints) { |
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$andConstraints = preg_split( |
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'/(?<!^|as|[=>< ,]) *(?<!-)[, ](?!-) *(?!,|as|$)/', |
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$constraints |
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); |
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foreach ($andConstraints as $constraint) { |
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$found[] = $constraint; |
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} |
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} |
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return $found; |
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} |
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/** |
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* Get the stability of a version |
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* |
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* @param string $version |
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* @return int|null Stability or null if STABLE or less than minimum |
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*/ |
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protected function getParsedStability($version) |
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{ |
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// Drop aliasing if used |
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$version = preg_replace('/^([^,\s@]+) as .+$/', '$1', $version); |
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$stability = $this->getStabilityInt( |
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VersionParser::parseStability($version) |
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); |
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if ($stability === BasePackage::STABILITY_STABLE || |
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$this->minimumStability > $stability |
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) { |
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// Ignore if 'stable' or more stable than the global |
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// minimum |
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$stability = null; |
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} |
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return $stability; |
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} |
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/** |
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* Get the current stability of a given package. |
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* |
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* @param string $name |
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* @return int|null Stability of null if not set |
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*/ |
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protected function getCurrentStability($name) |
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{ |
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return isset($this->stabilityFlags[$name]) ? |
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$this->stabilityFlags[$name] : null; |
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} |
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} |
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// vim:sw=4:ts=4:sts=4:et: |
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wikimedia /
composer-merge-plugin
