add support for whitespaces in folder names and key alias

fastlane actions/sign_apk.rb

@@ -12,9 +12,9 @@ def self.run(params)
       UI.user_error("Need keystore in order to sign apk") unless params[:keystore_path]
 
       sign_cmd = ["jarsigner -verbose -sigalg SHA1withRSA -digestalg SHA1"]
-      sign_cmd << ["-keystore #{params[:keystore_path]}" ] if params[:keystore_path]
-      sign_cmd << ["#{params[:apk_path]}"] if params[:apk_path]
-      sign_cmd << ["#{params[:alias]}"] if params[:alias]
+      sign_cmd << ["-keystore #{params[:keystore_path].shellescape}" ] if params[:keystore_path]
+      sign_cmd << ["#{params[:apk_path].shellescape}"] if params[:apk_path]
+      sign_cmd << ["'#{params[:alias]}'"] if params[:alias]
       sign_cmd << ["-keypass #{params[:keypass] ? params[:keypass] : params[:storepass]}"] if params[:keypass] || params[:storepass]
       sign_cmd << ["-storepass #{params[:storepass]}"] if params[:storepass]
       sign_cmd << ["-tsa #{params[:tsa]}"] if params[:tsa]
@@ -91,4 +91,4 @@ def self.is_supported?(platform)
       end
     end
   end
-end
+end