diff --git a/src/Illuminate/Foundation/Console/PackageDiscoverCommand.php b/src/Illuminate/Foundation/Console/PackageDiscoverCommand.php
new file mode 100644
index 000000000000..be7398365692
--- /dev/null
+++ b/src/Illuminate/Foundation/Console/PackageDiscoverCommand.php
@@ -0,0 +1,36 @@
+<?php
+
+namespace Illuminate\Foundation\Console;
+
+use Illuminate\Console\Command;
+use Illuminate\Foundation\PackageManifest;
+
+class PackageDiscoverCommand extends Command
+{
+    /**
+     * The console command signature.
+     *
+     * @var string
+     */
+    protected $signature = 'package:discover';
+
+    /**
+     * The console command description.
+     *
+     * @var string
+     */
+    protected $description = 'Rebuild the cached package manifest';
+
+    /**
+     * Execute the console command.
+     *
+     * @param  \Illuminate\Foundation\PackageManifest
+     * @return void
+     */
+    public function handle(PackageManifest $manifest)
+    {
+        $manifest->build();
+
+        $this->info('Package manifest generated successfully.');
+    }
+}
diff --git a/src/Illuminate/Foundation/PackageManifest.php b/src/Illuminate/Foundation/PackageManifest.php
new file mode 100644
index 000000000000..62ed7858d39c
--- /dev/null
+++ b/src/Illuminate/Foundation/PackageManifest.php
@@ -0,0 +1,174 @@
+<?php
+
+namespace Illuminate\Foundation;
+
+use Exception;
+use Illuminate\Filesystem\Filesystem;
+
+class PackageManifest
+{
+    /**
+     * The filesystem instance.
+     *
+     * @var \Illuminate\Filesystem\Filesystem
+     */
+    public $files;
+
+    /**
+     * The base path.
+     *
+     * @var string
+     */
+    public $basePath;
+
+    /**
+     * The vendor path.
+     *
+     * @var string
+     */
+    public $vendorPath;
+
+    /**
+     * The manifest path.
+     *
+     * @var string|null
+     */
+    public $manifestPath;
+
+    /**
+     * The loaded manifest array.
+     *
+     * @var array
+     */
+    public $manifest;
+
+    /**
+     * Create a new package manifest instance.
+     *
+     * @param  \Illuminate\Foundation\Filesystem  $files
+     * @param  string  $basePath
+     * @param  string  $manifestPath
+     * @return void
+     */
+    public function __construct(Filesystem $files, $basePath, $manifestPath)
+    {
+        $this->files = $files;
+        $this->basePath = $basePath;
+        $this->manifestPath = $manifestPath;
+        $this->vendorPath = $basePath.'/vendor';
+    }
+
+    /**
+     * Get all of the service provider class names for all packages.
+     *
+     * @return array
+     */
+    public function providers()
+    {
+        $this->ensureManifestIsLoaded();
+
+        return collect($this->manifest)->flatMap(function ($configuration, $name) {
+            return (array) ($configuration['providers'] ?? []);
+        })->filter()->all();
+    }
+
+    /**
+     * Get all of the aliases for all packages.
+     *
+     * @return array
+     */
+    public function aliases()
+    {
+        $this->ensureManifestIsLoaded();
+
+        return collect($this->manifest)->flatMap(function ($configuration, $name) {
+            return (array) ($configuration['aliases'] ?? []);
+        })->filter()->all();
+    }
+
+    /**
+     * Ensure the manifest has been loaded into memory.
+     *
+     * @return void
+     */
+    protected function ensureManifestIsLoaded()
+    {
+        if (! is_null($this->manifest)) {
+            return;
+        }
+
+        if (! file_exists($this->manifestPath)) {
+            $this->build();
+        }
+
+        if (file_exists($this->manifestPath)) {
+            $this->manifest = $this->files->getRequire($this->manifestPath);
+        } else {
+            $this->manifest = [];
+        }
+    }
+
+    /**
+     * Build the manifest and write it to disk.
+     *
+     * @return void
+     */
+    public function build()
+    {
+        $vendors = $this->files->directories($this->vendorPath);
+
+        $ignore = $this->packagesToIgnore();
+
+        $this->write(collect($vendors)->flatMap(function ($vendor) {
+            return $this->files->directories($vendor);
+        })->filter(function ($package) {
+            return $this->files->exists($package.'/composer.json');
+        })->mapWithKeys(function ($package) {
+            return [$this->format($package) => json_decode(
+                $this->files->get($package.'/composer.json'), true
+            )['extra']['laravel'] ?? []];
+        })->reject(function ($configuration, $package) use ($ignore) {
+            return in_array($package, $ignore);
+        })->filter()->all());
+    }
+
+    /**
+     * Format the given package name.
+     *
+     * @param  string  $package
+     * @return string
+     */
+    protected function format($package)
+    {
+        return str_replace($this->vendorPath.'/', '', $package);
+    }
+
+    /**
+     * Get all of the package names that should be ignored.
+     *
+     * @return array
+     */
+    protected function packagesToIgnore()
+    {
+        return json_decode(file_get_contents(
+            $this->basePath.'/composer.json'
+        ), true)['extra']['laravel']['dont-discover'] ?? [];
+    }
+
+    /**
+     * Write the given manifest array to disk.
+     *
+     * @param  arary  $manifest
+     * @return void
+     */
+    protected function write(array $manifest)
+    {
+        if (! is_writable(dirname($this->manifestPath))) {
+            throw new Exception('The bootstrap/cache directory must be present and writable.');
+        }
+
+        $this->files->put(
+            $this->manifestPath, '<?php return '.var_export($manifest, true).';'
+        );
+    }
+}