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<?php
/*
* This file is part of Composer.
*
* (c) Nils Adermann <naderman@naderman.de>
* Jordi Boggiano <j.boggiano@seld.be>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Composer\DependencyResolver;
use Composer\Package\CompletePackage;
use Composer\Package\Link;
use Composer\Package\PackageInterface;
/**
* @author Nils Adermann <naderman@naderman.de>
* @author Ruben Gonzalez <rubenrua@gmail.com>
*/
abstract class Rule
{
// reason constants
const RULE_INTERNAL_ALLOW_UPDATE = 1;
const RULE_JOB_INSTALL = 2;
const RULE_JOB_REMOVE = 3;
const RULE_PACKAGE_CONFLICT = 6;
const RULE_PACKAGE_REQUIRES = 7;
const RULE_PACKAGE_OBSOLETES = 8;
const RULE_INSTALLED_PACKAGE_OBSOLETES = 9;
const RULE_PACKAGE_SAME_NAME = 10;
const RULE_PACKAGE_IMPLICIT_OBSOLETES = 11;
const RULE_LEARNED = 12;
const RULE_PACKAGE_ALIAS = 13;
// bitfield defs
const BITFIELD_TYPE = 0;
const BITFIELD_REASON = 8;
const BITFIELD_DISABLED = 16;
protected $bitfield;
protected $reasonData;
/**
* @param int $reason A RULE_* constant describing the reason for generating this rule
* @param Link|PackageInterface $reasonData
* @param array $job The job this rule was created from
*/
public function __construct($reason, $reasonData, $job = null)
{
$this->reasonData = $reasonData;
if ($job) {
$this->job = $job;
}
$this->bitfield = (0 << self::BITFIELD_DISABLED) |
($reason << self::BITFIELD_REASON) |
(255 << self::BITFIELD_TYPE);
}
abstract public function getLiterals();
abstract public function getHash();
public function getJob()
{
return isset($this->job) ? $this->job : null;
}
abstract public function equals(Rule $rule);
public function getReason()
{
return ($this->bitfield & (255 << self::BITFIELD_REASON)) >> self::BITFIELD_REASON;
}
public function getReasonData()
{
return $this->reasonData;
}
public function getRequiredPackage()
{
if ($this->getReason() === self::RULE_JOB_INSTALL) {
return $this->reasonData;
}
if ($this->getReason() === self::RULE_PACKAGE_REQUIRES) {
return $this->reasonData->getTarget();
}
}
public function setType($type)
{
$this->bitfield = ($this->bitfield & ~(255 << self::BITFIELD_TYPE)) | ((255 & $type) << self::BITFIELD_TYPE);
}
public function getType()
{
return ($this->bitfield & (255 << self::BITFIELD_TYPE)) >> self::BITFIELD_TYPE;
}
public function disable()
{
$this->bitfield = ($this->bitfield & ~(255 << self::BITFIELD_DISABLED)) | (1 << self::BITFIELD_DISABLED);
}
public function enable()
{
$this->bitfield = $this->bitfield & ~(255 << self::BITFIELD_DISABLED);
}
public function isDisabled()
{
return (bool) (($this->bitfield & (255 << self::BITFIELD_DISABLED)) >> self::BITFIELD_DISABLED);
}
public function isEnabled()
{
return !(($this->bitfield & (255 << self::BITFIELD_DISABLED)) >> self::BITFIELD_DISABLED);
}
abstract public function isAssertion();
public function getPrettyString(Pool $pool, array $installedMap = array())
{
$literals = $this->getLiterals();
$ruleText = '';
foreach ($literals as $i => $literal) {
if ($i != 0) {
$ruleText .= '|';
}
$ruleText .= $pool->literalToPrettyString($literal, $installedMap);
}
switch ($this->getReason()) {
case self::RULE_INTERNAL_ALLOW_UPDATE:
return $ruleText;
case self::RULE_JOB_INSTALL:
return "Install command rule ($ruleText)";
case self::RULE_JOB_REMOVE:
return "Remove command rule ($ruleText)";
case self::RULE_PACKAGE_CONFLICT:
$package1 = $pool->literalToPackage($literals[0]);
$package2 = $pool->literalToPackage($literals[1]);
return $package1->getPrettyString().' conflicts with '.$this->formatPackagesUnique($pool, array($package2)).'.';
case self::RULE_PACKAGE_REQUIRES:
$sourceLiteral = array_shift($literals);
$sourcePackage = $pool->literalToPackage($sourceLiteral);
$requires = array();
foreach ($literals as $literal) {
$requires[] = $pool->literalToPackage($literal);
}
$text = $this->reasonData->getPrettyString($sourcePackage);
if ($requires) {
$text .= ' -> satisfiable by ' . $this->formatPackagesUnique($pool, $requires) . '.';
} else {
$targetName = $this->reasonData->getTarget();
if ($targetName === 'php' || $targetName === 'php-64bit' || $targetName === 'hhvm') {
// handle php/hhvm
if (defined('HHVM_VERSION')) {
return $text . ' -> your HHVM version does not satisfy that requirement.';
}
if ($targetName === 'hhvm') {
return $text . ' -> you are running this with PHP and not HHVM.';
}
$packages = $pool->whatProvides($targetName);
$package = count($packages) ? current($packages) : phpversion();
if (!($package instanceof CompletePackage)) {
return $text . ' -> your PHP version ('.phpversion().') does not satisfy that requirement.';
}
$extra = $package->getExtra();
if (!empty($extra['config.platform'])) {
$text .= ' -> your PHP version ('.phpversion().') overridden by "config.platform.php" version ('.$package->getPrettyVersion().') does not satisfy that requirement.';
} else {
$text .= ' -> your PHP version ('.$package->getPrettyVersion().') does not satisfy that requirement.';
}
return $text;
}
if (0 === strpos($targetName, 'ext-')) {
// handle php extensions
$ext = substr($targetName, 4);
$error = extension_loaded($ext) ? 'has the wrong version ('.(phpversion($ext) ?: '0').') installed' : 'is missing from your system';
return $text . ' -> the requested PHP extension '.$ext.' '.$error.'.';
}
if (0 === strpos($targetName, 'lib-')) {
// handle linked libs
$lib = substr($targetName, 4);
return $text . ' -> the requested linked library '.$lib.' has the wrong version installed or is missing from your system, make sure to have the extension providing it.';
}
if ($providers = $pool->whatProvides($targetName, $this->reasonData->getConstraint(), true, true)) {
return $text . ' -> satisfiable by ' . $this->formatPackagesUnique($pool, $providers) .' but these conflict with your requirements or minimum-stability.';
}
return $text . ' -> no matching package found.';
}
return $text;
case self::RULE_PACKAGE_OBSOLETES:
return $ruleText;
case self::RULE_INSTALLED_PACKAGE_OBSOLETES:
return $ruleText;
case self::RULE_PACKAGE_SAME_NAME:
return 'Can only install one of: ' . $this->formatPackagesUnique($pool, $literals) . '.';
case self::RULE_PACKAGE_IMPLICIT_OBSOLETES:
return $ruleText;
case self::RULE_LEARNED:
return 'Conclusion: '.$ruleText;
case self::RULE_PACKAGE_ALIAS:
return $ruleText;
default:
return '('.$ruleText.')';
}
}
/**
* @param Pool $pool
* @param array $packages
*
* @return string
*/
protected function formatPackagesUnique($pool, array $packages)
{
$prepared = array();
foreach ($packages as $package) {
if (!is_object($package)) {
$package = $pool->literalToPackage($package);
}
$prepared[$package->getName()]['name'] = $package->getPrettyName();
$prepared[$package->getName()]['versions'][$package->getVersion()] = $package->getPrettyVersion();
}
foreach ($prepared as $name => $package) {
$prepared[$name] = $package['name'].'['.implode(', ', $package['versions']).']';
}
return implode(', ', $prepared);
}
}
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