Fix deletion of corrupt 0-bytes zip archives from the cache

src/Composer/Downloader/ArchiveDownloader.php

@@ -120,7 +120,9 @@ public function install(PackageInterface $package, $path, $output = true)
         }
 
         return $promise->then(function () use ($self, $package, $filesystem, $fileName, $temporaryDir, $path) {
-            $filesystem->unlink($fileName);
+            if (file_exists($fileName)) {
+                $filesystem->unlink($fileName);
+            }
 
             /**
              * Returns the folder content, excluding .DS_Store

src/Composer/Downloader/ZipDownloader.php

@@ -184,7 +184,12 @@ public function extractWithZipArchive(PackageInterface $package, $file, $path)
         $zipArchive = $this->zipArchiveObject ?: new ZipArchive();
 
         try {
-            if (true === ($retval = $zipArchive->open($file))) {
+            if (!file_exists($file) || ($filesize = filesize($file)) === false || $filesize === 0) {
+                $retval = -1;
+            } else {
+                $retval = $zipArchive->open($file);
+            }
+            if (true === $retval) {
                 $extractResult = $zipArchive->extractTo($path);
 
                 if (true === $extractResult) {
@@ -251,6 +256,8 @@ protected function getErrorMessage($retval, $file)
                 return sprintf("Zip read error (%s)", $file);
             case ZipArchive::ER_SEEK:
                 return sprintf("Zip seek error (%s)", $file);
+            case -1:
+                return sprintf("'%s' is a corrupted zip archive (0 bytes), try again.", $file);
             default:
                 return sprintf("'%s' is not a valid zip archive, got error code: %s", $file, $retval);
         }

tests/Composer/Test/Downloader/ZipDownloaderTest.php

@@ -31,6 +31,8 @@ class ZipDownloaderTest extends TestCase
     private $config;
     /** @var \Composer\Package\PackageInterface&\PHPUnit\Framework\MockObject\MockObject */
     private $package;
+    /** @var string */
+    private $filename;
 
     public function setUp()
     {
@@ -40,6 +42,9 @@ public function setUp()
         $dlConfig = $this->getMockBuilder('Composer\Config')->getMock();
         $this->httpDownloader = new HttpDownloader($this->io, $dlConfig);
         $this->package = $this->getMockBuilder('Composer\Package\PackageInterface')->getMock();
+
+        $this->filename = $this->testDir.'/composer-test.zip';
+        file_put_contents($this->filename, 'zip');
     }
 
     public function tearDown()
@@ -123,7 +128,7 @@ public function testZipArchiveOnlyFailed()
             ->will($this->returnValue(false));
 
         $this->setPrivateProperty('zipArchiveObject', $zipArchive, $downloader);
-        $promise = $downloader->extract($this->package, 'testfile.zip', 'vendor/dir');
+        $promise = $downloader->extract($this->package, $this->filename, 'vendor/dir');
         $this->wait($promise);
     }
 
@@ -145,7 +150,7 @@ public function testZipArchiveExtractOnlyFailed()
             ->will($this->throwException(new \ErrorException('Not a directory')));
 
         $this->setPrivateProperty('zipArchiveObject', $zipArchive, $downloader);
-        $promise = $downloader->extract($this->package, 'testfile.zip', 'vendor/dir');
+        $promise = $downloader->extract($this->package, $this->filename, 'vendor/dir');
         $this->wait($promise);
     }
 
@@ -166,7 +171,7 @@ public function testZipArchiveOnlyGood()
             ->will($this->returnValue(true));
 
         $this->setPrivateProperty('zipArchiveObject', $zipArchive, $downloader);
-        $promise = $downloader->extract($this->package, 'testfile.zip', 'vendor/dir');
+        $promise = $downloader->extract($this->package, $this->filename, 'vendor/dir');
         $this->wait($promise);
     }
 
@@ -194,7 +199,7 @@ public function testSystemUnzipOnlyFailed()
             ->will($this->returnValue(\React\Promise\resolve($procMock)));
 
         $downloader = new MockedZipDownloader($this->io, $this->config, $this->httpDownloader, null, null, null, $processExecutor);
-        $promise = $downloader->extract($this->package, 'testfile.zip', 'vendor/dir');
+        $promise = $downloader->extract($this->package, $this->filename, 'vendor/dir');
         $this->wait($promise);
     }
 
@@ -221,7 +226,7 @@ public function testSystemUnzipOnlyGood()
             ->will($this->returnValue(\React\Promise\resolve($procMock)));
 
         $downloader = new MockedZipDownloader($this->io, $this->config, $this->httpDownloader, null, null, null, $processExecutor);
-        $promise = $downloader->extract($this->package, 'testfile.zip', 'vendor/dir');
+        $promise = $downloader->extract($this->package, $this->filename, 'vendor/dir');
         $this->wait($promise);
     }
 
@@ -260,7 +265,7 @@ public function testNonWindowsFallbackGood()
 
         $downloader = new MockedZipDownloader($this->io, $this->config, $this->httpDownloader, null, null, null, $processExecutor);
         $this->setPrivateProperty('zipArchiveObject', $zipArchive, $downloader);
-        $promise = $downloader->extract($this->package, 'testfile.zip', 'vendor/dir');
+        $promise = $downloader->extract($this->package, $this->filename, 'vendor/dir');
         $this->wait($promise);
     }
 
@@ -300,7 +305,7 @@ public function testNonWindowsFallbackFailed()
 
         $downloader = new MockedZipDownloader($this->io, $this->config, $this->httpDownloader, null, null, null, $processExecutor);
         $this->setPrivateProperty('zipArchiveObject', $zipArchive, $downloader);
-        $promise = $downloader->extract($this->package, 'testfile.zip', 'vendor/dir');
+        $promise = $downloader->extract($this->package, $this->filename, 'vendor/dir');
         $this->wait($promise);
     }