From 3791a574a242704ecec2ea7a11da74d264bbb86c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Maximilian=20B=C3=B6sing?=
 <2189546+boesing@users.noreply.github.com>
Date: Tue, 7 Jan 2020 09:14:35 +0100
Subject: [PATCH 1/2] Provide partial packages names if available, closes
 #8516, fixes #8526

---
 .../Repository/ComposerRepository.php         |  5 ++++
 .../Repository/ComposerRepositoryTest.php     | 29 +++++++++++++++++++
 2 files changed, 34 insertions(+)

diff --git a/src/Composer/Repository/ComposerRepository.php b/src/Composer/Repository/ComposerRepository.php
index c595b20c2..a58896eeb 100644
--- a/src/Composer/Repository/ComposerRepository.php
+++ b/src/Composer/Repository/ComposerRepository.php
@@ -249,6 +249,11 @@ class ComposerRepository extends ArrayRepository implements ConfigurableReposito
             $this->loadProviderListings($this->loadRootServerFile());
         }
 
+        if ($this->hasPartialPackages && null === $this->partialPackagesByName) {
+            $this->initializePartialPackages();
+            return array_keys($this->partialPackagesByName);
+        }
+
         if ($this->lazyProvidersUrl) {
             // Can not determine list of provided packages for lazy repositories
             return array();
diff --git a/tests/Composer/Test/Repository/ComposerRepositoryTest.php b/tests/Composer/Test/Repository/ComposerRepositoryTest.php
index 8e9216b35..4ec826334 100644
--- a/tests/Composer/Test/Repository/ComposerRepositoryTest.php
+++ b/tests/Composer/Test/Repository/ComposerRepositoryTest.php
@@ -271,4 +271,33 @@ class ComposerRepositoryTest extends TestCase
             ),
         );
     }
+
+    public function testGetProviderNamesWillReturnPartialPackageNames()
+    {
+        $rfs = $this->getMockBuilder('Composer\Util\RemoteFilesystem')
+            ->disableOriginalConstructor()
+            ->getMock();
+
+        $rfs->expects($this->at(0))
+            ->method('getContents')
+            ->with('example.org', 'http://example.org/packages.json', false)
+            ->willReturn(json_encode(array(
+                'providers-lazy-url' => '/foo/p/%package%.json',
+                'packages' => array('foo/bar' => array(
+                    'dev-branch' => array(),
+                    'v1.0.0' => array(),
+                ))
+            )));
+
+        $repository = new ComposerRepository(
+            array('url' => 'http://example.org/packages.json'),
+            new NullIO(),
+            FactoryMock::createConfig(),
+            null,
+            $rfs
+        );
+
+        $this->assertTrue($repository->hasProviders());
+        $this->assertEquals(array('foo/bar'), $repository->getProviderNames());
+    }
 }

From 0b767e0b83efa80005a781a8141c94016365f907 Mon Sep 17 00:00:00 2001
From: Jordi Boggiano <j.boggiano@seld.be>
Date: Tue, 14 Jan 2020 09:31:27 +0100
Subject: [PATCH 2/2] Allow calling getProviderNames multiple times, refs #8516

---
 src/Composer/Repository/ComposerRepository.php | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/Composer/Repository/ComposerRepository.php b/src/Composer/Repository/ComposerRepository.php
index a58896eeb..649c2f115 100644
--- a/src/Composer/Repository/ComposerRepository.php
+++ b/src/Composer/Repository/ComposerRepository.php
@@ -249,8 +249,11 @@ class ComposerRepository extends ArrayRepository implements ConfigurableReposito
             $this->loadProviderListings($this->loadRootServerFile());
         }
 
-        if ($this->hasPartialPackages && null === $this->partialPackagesByName) {
-            $this->initializePartialPackages();
+        if ($this->hasPartialPackages) {
+            if (null === $this->partialPackagesByName) {
+                $this->initializePartialPackages();
+            }
+
             return array_keys($this->partialPackagesByName);
         }