For dev extraction skip pool building, we already have a working package set

Also reduce getProviders back to just providers, and add some todos

src/Composer/DependencyResolver/Problem.php

@@ -248,7 +248,7 @@ class Problem
             return array("- Root composer.json requires $packageName, it ", 'could not be found, it looks like its name is invalid, "'.$illegalChars.'" is not allowed in package names.');
         }
 
-        if ($providers = $repositorySet->getProvidersAndReplacers($packageName)) {
+        if ($providers = $repositorySet->getProviders($packageName)) {
             $maxProviders = 20;
             $providersStr = implode(array_map(function ($p) {
                 $description = $p['description'] ? ' '.substr($p['description'], 0, 100) : '';

src/Composer/Installer.php

@@ -565,7 +565,7 @@ class Installer
             $request->requireName($link->getTarget(), $link->getConstraint());
         }
 
-        $pool = $repositorySet->createPool($request, $this->eventDispatcher);
+        $pool = $repositorySet->createPool($request, $this->eventDispatcher, true);
 
         $solver = new Solver($policy, $pool, $this->io, $repositorySet);
         try {

src/Composer/Repository/ComposerRepository.php

@@ -422,11 +422,13 @@ class ComposerRepository extends ArrayRepository implements ConfigurableReposito
     public function getProviders($packageName)
     {
         if (!$this->providersApiUrl) {
+            // TODO should this return the info based on getPackages in other cases?
             return array();
         }
 
         $result = $this->httpDownloader->get(str_replace('%package%', $packageName, $this->providersApiUrl), $this->options)->decodeJson();
 
+        // TODO filter packageName out here?
         return $result['providers'];
     }
 

src/Composer/Repository/RepositorySet.php

@@ -163,7 +163,7 @@ class RepositorySet
         return $candidates;
     }
 
-    public function getProvidersAndReplacers($packageName)
+    public function getProviders($packageName)
     {
         $providers = array();
         foreach ($this->repositories as $repository) {
@@ -173,7 +173,7 @@ class RepositorySet
                 }
             } else {
                 foreach ($repository->getPackages() as $candidate) {
-                    foreach (array_merge($candidate->getProvides(), $candidate->getReplaces()) as $link) {
+                    foreach ($candidate->getProvides() as $link) {
                         if ($packageName === $link->getTarget()) {
                             $providers[] = array(
                                 'name' => $candidate->getName(),
@@ -200,10 +200,8 @@ class RepositorySet
      *
      * @return Pool
      */
-    public function createPool(Request $request, EventDispatcher $eventDispatcher = null)
+    public function createPool(Request $request, EventDispatcher $eventDispatcher = null, $allPackages = false)
     {
-        $poolBuilder = new PoolBuilder($this->acceptableStabilities, $this->stabilityFlags, $this->rootAliases, $this->rootReferences, $eventDispatcher);
-
         foreach ($this->repositories as $repo) {
             if (($repo instanceof InstalledRepositoryInterface || $repo instanceof InstalledRepository) && !$this->allowInstalledRepositories) {
                 throw new \LogicException('The pool can not accept packages from an installed repository');
@@ -212,6 +210,16 @@ class RepositorySet
 
         $this->locked = true;
 
+        if ($allPackages) {
+            $packages = array();
+            foreach ($this->repositories as $repository) {
+                $packages = array_merge($packages, $repository->getPackages());
+            }
+            return new Pool($packages);
+        }
+
+        $poolBuilder = new PoolBuilder($this->acceptableStabilities, $this->stabilityFlags, $this->rootAliases, $this->rootReferences, $eventDispatcher);
+
         return $poolBuilder->buildPool($this->repositories, $request);
     }