Add some prerequisites

src/symbols/nginx/server.rs

@@ -6,6 +6,7 @@ use std::ops::Deref;
 use command_runner::CommandRunner;
 use symbols::Symbol;
 use symbols::file::File as FileSymbol;
+use resources::Resource;
 
 #[derive(Debug)]
 pub enum NginxServerError<E: Error> {
@@ -99,6 +100,10 @@ impl<'a, C> Symbol for NginxServer<'a, C> where C: Deref<Target=str> {
     try!(self.command_runner.run_with_args("systemctl", &["reload-or-restart", "nginx"]));
     Ok(())
   }
+
+  fn get_prerequisites(&self) -> Vec<Box<Resource>> {
+    self.file.get_prerequisites()
+  }
 }
 
 impl<'a, C> fmt::Display for NginxServer<'a, C> where C: Deref<Target=str> {