add ignore-platform-package-requirements for update/install commands.

src/Composer/Command/InstallCommand.php

@@ -45,6 +45,7 @@ class InstallCommand extends Command
                 new InputOption('no-progress', null, InputOption::VALUE_NONE, 'Do not output download progress.'),
                 new InputOption('verbose', 'v|vv|vvv', InputOption::VALUE_NONE, 'Shows more details including new commits pulled in when updating packages.'),
                 new InputOption('optimize-autoloader', 'o', InputOption::VALUE_NONE, 'Optimize autoloader during autoloader dump'),
+                new InputOption('ignore-platform-package-requirements', null, InputOption::VALUE_NONE, 'Ignore PHP Extention requirements.'),
                 new InputArgument('packages', InputArgument::IS_ARRAY | InputArgument::OPTIONAL, 'Should not be provided, use composer require instead to add a given package to composer.json.'),
             ))
             ->setHelp(<<<EOT
@@ -114,6 +115,7 @@ EOT
             ->setDevMode(!$input->getOption('no-dev'))
             ->setRunScripts(!$input->getOption('no-scripts'))
             ->setOptimizeAutoloader($optimize)
+            ->setIgnorePlatformPackage($input->getOption('ignore-platform-package-requirements'));
         ;
 
         if ($input->getOption('no-plugins')) {

src/Composer/Command/UpdateCommand.php

@@ -45,7 +45,8 @@ class UpdateCommand extends Command
                 new InputOption('no-progress', null, InputOption::VALUE_NONE, 'Do not output download progress.'),
                 new InputOption('with-dependencies', null, InputOption::VALUE_NONE, 'Add also all dependencies of whitelisted packages to the whitelist.'),
                 new InputOption('verbose', 'v|vv|vvv', InputOption::VALUE_NONE, 'Shows more details including new commits pulled in when updating packages.'),
-                new InputOption('optimize-autoloader', 'o', InputOption::VALUE_NONE, 'Optimize autoloader during autoloader dump.')
+                new InputOption('optimize-autoloader', 'o', InputOption::VALUE_NONE, 'Optimize autoloader during autoloader dump.'),
+                new InputOption('ignore-platform-package-requirements', null, InputOption::VALUE_NONE, 'Ignore PHP Extention requirements.'),
             ))
             ->setHelp(<<<EOT
 The <info>update</info> command reads the composer.json file from the
@@ -119,6 +120,7 @@ EOT
             ->setUpdate(true)
             ->setUpdateWhitelist($input->getOption('lock') ? array('lock') : $input->getArgument('packages'))
             ->setWhitelistDependencies($input->getOption('with-dependencies'))
+            ->setIgnorePlatformPackage($input->getOption('ignore-platform-package-requirements'));
         ;
 
         if ($input->getOption('no-plugins')) {

src/Composer/DependencyResolver/Solver.php

@@ -13,6 +13,7 @@
 namespace Composer\DependencyResolver;
 
 use Composer\Repository\RepositoryInterface;
+use Composer\Repository\PlatformRepository;
 
 /**
  * @author Nils Adermann <naderman@naderman.de>
@@ -129,7 +130,7 @@ class Solver
         }
     }
 
-    protected function checkForRootRequireProblems()
+    protected function checkForRootRequireProblems($ignorePlatformPackageRequirements)
     {
         foreach ($this->jobs as $job) {
             switch ($job['cmd']) {
@@ -149,6 +150,10 @@ class Solver
                     break;
 
                 case 'install':
+                    if ($ignorePlatformPackageRequirements && preg_match(PlatformRepository::PLATFORM_PACKAGE_REGEX, $job['packageName'])) {
+                        break;
+                    }
+
                     if (!$this->pool->whatProvides($job['packageName'], $job['constraint'])) {
                         $problem = new Problem($this->pool);
                         $problem->addRule(new Rule($this->pool, array(), null, null, $job));
@@ -159,16 +164,24 @@ class Solver
         }
     }
 
-    public function solve(Request $request)
+    public function solve(Request $request, $ignorePlatformPackage = false)
     {
         $this->jobs = $request->getJobs();
 
         $this->setupInstalledMap();
         $this->rules = $this->ruleSetGenerator->getRulesFor($this->jobs, $this->installedMap);
-        $this->checkForRootRequireProblems();
+        $this->checkForRootRequireProblems($ignorePlatformPackage);
         $this->decisions = new Decisions($this->pool);
         $this->watchGraph = new RuleWatchGraph;
 
+        if ($ignorePlatformPackage) {
+            foreach ($this->rules as $rule) {
+                if ($rule->getReason() === Rule::RULE_PACKAGE_REQUIRES && preg_match(PlatformRepository::PLATFORM_PACKAGE_REGEX, $rule->getRequiredPackage())) {
+                    $rule->disable();
+                }
+            }
+        }
+
         foreach ($this->rules as $rule) {
             $this->watchGraph->insert(new RuleWatchNode($rule));
         }

src/Composer/Installer.php

@@ -105,6 +105,7 @@ class Installer
     protected $verbose = false;
     protected $update = false;
     protected $runScripts = true;
+    protected $ignorePlatformPackage = false;
     /**
      * Array of package names/globs flagged for update
      *
@@ -263,7 +264,7 @@ class Installer
 
                     $this->eventDispatcher->dispatchInstallerEvent(InstallerEvents::PRE_DEPENDENCIES_SOLVING, $policy, $pool, $installedRepo, $request);
                     $solver = new Solver($policy, $pool, $installedRepo);
-                    $ops = $solver->solve($request);
+                    $ops = $solver->solve($request, $this->ignorePlatformPackage);
                     $this->eventDispatcher->dispatchInstallerEvent(InstallerEvents::POST_DEPENDENCIES_SOLVING, $policy, $pool, $installedRepo, $request, $ops);
                     foreach ($ops as $op) {
                         if ($op->getJobType() === 'uninstall') {
@@ -470,7 +471,7 @@ class Installer
         $this->eventDispatcher->dispatchInstallerEvent(InstallerEvents::PRE_DEPENDENCIES_SOLVING, $policy, $pool, $installedRepo, $request);
         $solver = new Solver($policy, $pool, $installedRepo);
         try {
-            $operations = $solver->solve($request);
+            $operations = $solver->solve($request, $this->ignorePlatformPackage);
             $this->eventDispatcher->dispatchInstallerEvent(InstallerEvents::POST_DEPENDENCIES_SOLVING, $policy, $pool, $installedRepo, $request, $operations);
         } catch (SolverProblemsException $e) {
             $this->io->write('<error>Your requirements could not be resolved to an installable set of packages.</error>');
@@ -1156,6 +1157,18 @@ class Installer
         return $this;
     }
 
+    /**
+     * set ignore Platform Package requirements
+     *
+     * @param  boolean   $ignorePlatformPackage
+     * @return Installer
+     */
+    public function setIgnorePlatformPackage($ignorePlatformPackage = false) {
+        $this->ignorePlatformPackage = (boolean) $ignorePlatformPackage;
+
+        return $this;
+    }
+
     /**
      * restrict the update operation to a few packages, all other packages
      * that are already installed will be kept at their current version

tests/Composer/Test/Fixtures/installer/install-ignore-platform-package-requirements.test

@@ -0,0 +1,20 @@
+--TEST--
+Install in ignore-platform-package-requirements mode
+--COMPOSER--
+{
+    "repositories": [
+        {
+            "type": "package",
+            "package": [
+                { "name": "a/a", "version": "1.0.0", "require": { "ext-testdummy": "*" } }
+            ]
+        }
+    ],
+    "require": {
+        "a/a": "1.0.0"
+    }
+}
+--RUN--
+install --ignore-platform-package-requirements
+--EXPECT--
+Installing a/a (1.0.0)

tests/Composer/Test/Fixtures/installer/update-ignore-platform-package-requirements.test

@@ -0,0 +1,24 @@
+--TEST--
+Update in ignore-platform-package-requirements mode
+--COMPOSER--
+{
+    "repositories": [
+        {
+            "type": "package",
+            "package": [
+                { "name": "a/a", "version": "1.0.1", "require": { "ext-testdummy": "*" } }
+            ]
+        }
+    ],
+    "require": {
+        "a/a": "1.0.*"
+    }
+}
+--INSTALLED--
+[
+    { "name": "a/a", "version": "1.0.0" }
+]
+--RUN--
+update --ignore-platform-package-requirements
+--EXPECT--
+Updating a/a (1.0.0) to a/a (1.0.1)

tests/Composer/Test/InstallerTest.php

@@ -204,7 +204,8 @@ class InstallerTest extends TestCase
         $application->get('install')->setCode(function ($input, $output) use ($installer) {
             $installer
                 ->setDevMode(!$input->getOption('no-dev'))
-                ->setDryRun($input->getOption('dry-run'));
+                ->setDryRun($input->getOption('dry-run'))
+                ->setIgnorePlatformPackage($input->getOption('ignore-platform-package-requirements'));
 
             return $installer->run();
         });
@@ -215,7 +216,8 @@ class InstallerTest extends TestCase
                 ->setUpdate(true)
                 ->setDryRun($input->getOption('dry-run'))
                 ->setUpdateWhitelist($input->getArgument('packages'))
-                ->setWhitelistDependencies($input->getOption('with-dependencies'));
+                ->setWhitelistDependencies($input->getOption('with-dependencies'))
+                ->setIgnorePlatformPackage($input->getOption('ignore-platform-package-requirements'));
 
             return $installer->run();
         });