Fix OTP-27 Dialyzer errors in trust_store_http

Author: lhoguin

deps/trust_store_http/src/trust_store_http.erl

@@ -5,8 +5,8 @@
 
 main([]) ->
     io:format("~nStarting trust store server ~n", []),
-    application:ensure_all_started(trust_store_http),
+    {ok, _} = application:ensure_all_started(trust_store_http),
     io:format("~nTrust store server started on port ~tp ~n",
               [application:get_env(trust_store_http, port, undefined)]),
     user_drv:start(),
-    timer:sleep(infinity).
+    timer:sleep(infinity).

deps/trust_store_http/src/trust_store_http_app.erl

@@ -15,7 +15,7 @@ start(_Type, _Args) ->
                {"/certs/[...]", cowboy_static,
                 {dir, Directory, [{mimetypes, {<<"text">>, <<"html">>, []}}]}}]}
     ]),
-    case get_ssl_options() of
+    _ = case get_ssl_options() of
         undefined  -> start_http(Dispatch, Port);
         SslOptions -> start_https(Dispatch, Port, SslOptions)
     end,

deps/trust_store_http/src/trust_store_list_handler.erl

@@ -25,7 +25,7 @@ respond(Files, Req, State) ->
 respond_error(Reason, Req, State) ->
     Error = io_lib:format("Error listing certificates ~tp", [Reason]),
     logger:log(error, "~ts", [Error]),
-    Req2 = cowboy_req:reply(500, [], iolist_to_binary(Error), Req),
+    Req2 = cowboy_req:reply(500, #{}, iolist_to_binary(Error), Req),
     {ok, Req2, State}.
 
 json_encode(Files) ->
@@ -40,7 +40,6 @@ cert_id(FileName, FileDate, FileHash) ->
 cert_path(FileName) ->
     iolist_to_binary(["/certs/", FileName]).
 
--spec list_files(string()) -> [{string(), file:date_time(), integer()}].
 list_files(Directory) ->
     case file:list_dir(Directory) of
         {ok, FileNames} ->