Merge pull request #336 from naderman/solver-only-error-reporting

Errors are now reported solely by the solver without any workarounds

src/Composer/Command/InstallCommand.php

@@ -156,34 +156,6 @@ EOT
         // solve dependencies
         $operations = $solver->solve($request);
 
-        // check for missing deps
-        // TODO this belongs in the solver, but this will do for now to report top-level deps missing at least
-        foreach ($request->getJobs() as $job) {
-            if ('install' === $job['cmd']) {
-                foreach ($installedRepo->getPackages() as $package ) {
-                    if ($installedRepo->hasPackage($package) && !$package->isPlatform() && !$installationManager->isPackageInstalled($package)) {
-                        $operations[$job['packageName']] = new InstallOperation($package, Solver::RULE_PACKAGE_NOT_EXIST);
-                    }
-                    if (in_array($job['packageName'], $package->getNames())) {
-                        continue 2;
-                    }
-                }
-                foreach ($operations as $operation) {
-                    if ('install' === $operation->getJobType() && in_array($job['packageName'], $operation->getPackage()->getNames())) {
-                        continue 2;
-                    }
-                    if ('update' === $operation->getJobType() && in_array($job['packageName'], $operation->getTargetPackage()->getNames())) {
-                        continue 2;
-                    }
-                }
-
-                if ($pool->whatProvides($job['packageName'])) {
-                    throw new \UnexpectedValueException('Package '.$job['packageName'].' can not be installed, either because its version constraint is incorrect, or because one of its dependencies was not found.');
-                }
-                throw new \UnexpectedValueException('Package '.$job['packageName'].' was not found in the package pool, check the name for typos.');
-            }
-        }
-
         // execute operations
         if (!$operations) {
             $io->write('<info>Nothing to install/update</info>');

src/Composer/DependencyResolver/Solver.php

@@ -147,10 +147,6 @@ class Solver
      */
     protected function createInstallOneOfRule(array $packages, $reason, $reasonData = null)
     {
-        if (empty($packages)) {
-            return $this->createImpossibleRule($reason, $reasonData);
-        }
-
         $literals = array();
         foreach ($packages as $package) {
             $literals[] = new Literal($package, true);
@@ -200,22 +196,6 @@ class Solver
         return new Rule(array(new Literal($issuer, false), new Literal($provider, false)), $reason, $reasonData);
     }
 
-    /**
-     * Intentionally creates a rule impossible to solve
-     *
-     * The rule is an empty one so it can never be satisfied.
-     *
-     * @param int     $reason     A RULE_* constant describing the reason for
-     *                            generating this rule
-     * @param mixed   $reasonData Any data, e.g. the package name, that goes with
-     *                            the reason
-     * @return Rule               An empty rule
-     */
-    protected function createImpossibleRule($reason, $reasonData = null)
-    {
-        return new Rule(array(), $reason, $reasonData);
-    }
-
     /**
      * Adds a rule unless it duplicates an existing one of any type
      *
@@ -972,12 +952,6 @@ class Solver
 
 
         foreach ($this->jobs as $job) {
-            if (empty($job['packages']) && $job['cmd'] == 'install') {
-                $this->addRule(
-                    RuleSet::TYPE_JOB,
-                    $this->createImpossibleRule(static::RULE_JOB_INSTALL, $job)
-                );
-            }
             foreach ($job['packages'] as $package) {
                 switch ($job['cmd']) {
                     case 'install':
@@ -1002,9 +976,13 @@ class Solver
         foreach ($this->jobs as $job) {
             switch ($job['cmd']) {
                 case 'install':
+                    if (empty($job['packages'])) {
+                        $this->problems[] = array($job);
+                    } else {
                         $rule = $this->createInstallOneOfRule($job['packages'], self::RULE_JOB_INSTALL, $job['packageName']);
                         $this->addRule(RuleSet::TYPE_JOB, $rule);
                         $this->ruleToJob[$rule->getId()] = $job;
+                    }
                     break;
                 case 'remove':
                     // remove all packages with this name including uninstalled

tests/Composer/Test/DependencyResolver/SolverTest.php

@@ -57,8 +57,6 @@ class SolverTest extends TestCase
 
     public function testInstallNonExistingPackageFails()
     {
-        $this->markTestIncomplete('Reporting this failure is not implemented/working yet');
-
         $this->repo->addPackage($this->getPackage('A', '1.0'));
         $this->reposComplete();