adding dependencies for supported platforms

lib/private/app/dependencyanalyzer.php

@@ -48,6 +48,7 @@ class DependencyAnalyzer {
 		$this->analyzeDatabases();
 		$this->analyzeCommands();
 		$this->analyzeLibraries();
+		$this->analyzeOS();
 		return $this->missing;
 	}
 
@@ -135,6 +136,26 @@ class DependencyAnalyzer {
 		}
 	}
 
+	private function analyzeOS() {
+		if (!isset($this->dependencies['os'])) {
+			return;
+		}
+
+		$oss = $this->dependencies['os'];
+		if (empty($oss)) {
+			return;
+		}
+		$oss = array_map(function($os) {
+			return $this->getValue($os);
+		}, $oss);
+		$currentOS = $this->platform->getOS();
+		if (!in_array($currentOS, $oss)) {
+			$this->addMissing((string)$this->l->t('Following platforms are supported: %s', join(', ', $oss)));
+		}
+	}
+
+
+
 	/**
 	 * @param $element
 	 * @return mixed

tests/data/app/expected-info.json

@@ -59,6 +59,7 @@
 				"@value": "intl"
 			},
 			"curl"
-		]
+		],
+		"os": "Linux"
 	}
 }

tests/data/app/valid-info.xml

@@ -28,5 +28,6 @@
 		<lib min-version="1.2">xml</lib>
 		<lib max-version="2.0">intl</lib>
 		<lib>curl</lib>
+		<os>Linux</os>
 	</dependencies>
 </info>

tests/lib/app/dependencyanalyzer.php

@@ -141,6 +141,34 @@ class DependencyAnalyzer extends \PHPUnit_Framework_TestCase {
 		$this->assertEquals($expectedMissing, $missing);
 	}
 
+	/**
+	 * @dataProvider providesOS
+	 * @param $expectedMissing
+	 * @param $oss
+	 */
+	function testOS($expectedMissing, $oss) {
+		$app = array(
+			'dependencies' => array()
+		);
+		if (!is_null($oss)) {
+			$app['dependencies']['os'] = $oss;
+		}
+
+		$analyser = new \OC\App\DependencyAnalyzer($app, $this->platformMock, $this->l10nMock);
+		$missing = $analyser->analyze();
+
+		$this->assertTrue(is_array($missing));
+		$this->assertEquals($expectedMissing, $missing);
+	}
+
+	function providesOS() {
+		return array(
+			array(array(), null),
+			array(array(), array()),
+			array(array('Following platforms are supported: WINNT'), array('WINNT'))
+		);
+	}
+
 	function providesLibs() {
 		return array(
 			// we expect curl to exist