add check if uncompresseddir is valid

I removed the deletion of $tempdir content. I needed a clean directory to unpack the plugin to avoid finding the wrong version.php file. I instead create a subdirectory for this purpose.

I thought clearing the $tempdir wouldn't be a problem since the downloaded content was removed after being unpacked anyway.

the check for the validity of uncompresseddir is added

Moosh/Command/Generic/Plugin/PluginInstall.php

@@ -67,8 +67,6 @@ public function execute()
 
         if (!file_exists($tempdir)) {
             mkdir($tempdir);
-        } else {
-            run_external_command("rm -rf $tempdir/*");
         }
 
         if (!fopen($downloadedfile, 'w')) {
@@ -98,12 +96,22 @@ public function execute()
             }
         }
 
-        run_external_command("unzip $downloadedfile -d $tempdir");
+        $unzipdir = $tempdir . $component;
+        if (!file_exists($unzipdir)) {
+            mkdir($unzipdir);
+        }
+
+        run_external_command("unzip $downloadedfile -d $unzipdir");
         run_external_command("rm $downloadedfile");
 
         //Get the path of uncompressed plugin dir (in case the .zip decompresses into multiple directories / non standard directory)
-        $uncompresseddir = exec("find $tempdir -name 'version.php' | rev | cut -d'/' -f 2- | rev");
-        run_external_command("mv $uncompresseddir $targetpath");
+        $uncompresseddir = exec("find $unzipdir -name 'version.php' | rev | cut -d'/' -f 2- | rev");
+        if (file_exists($uncompresseddir)){
+            run_external_command("mv $uncompresseddir $targetpath");
+        } else {
+            die("The zipfile does not seem to be a valid plugin (no version.php found)\n");
+        }
+        run_external_command("rm -rf $unzipdir");
 
         echo "Installing\n";
         echo "\tname:    $pluginname\n";