make post-init Xlog.logs work

README.md

@@ -46,3 +46,23 @@ else
   Xlog.init_pretty_writer stdout
     ~min_level:Xlog.DEBUG
 ```
+
+## usage with ppx
+
+```ocaml
+[%%xlog_import]
+
+[%xlog info "log message %d" 1337]
+
+try
+  fallible_task ()
+with
+| e -> [%xlog exn e "oop's"]
+
+module Submodule = struct
+  [%%xlog_import]
+
+  let do_stuff () =
+    [%xlog warn "meow"]
+end
+```

lib/xlog.ml

@@ -12,7 +12,7 @@ type logger = {
 let rec root_logger = {
   namespace = "";
   pnamespace = [];
-  min_level = 0;
+  min_level = Int.max_int;
   child = root_logger;
   sibling = root_logger;
   writers = None;
@@ -31,10 +31,10 @@ let make_logger parent_logger ns =
   let rec logger = {
     namespace = String.concat "." (List.rev pnamespace);
     pnamespace = pnamespace;
-    min_level = Int.max_int;
+    min_level = parent_logger.min_level;
     child = logger;
     sibling = parent_logger.child;
-    writers = None;
+    writers = parent_logger.writers;
   } in
   parent_logger.child <- logger;
   logger

test/test_xlog.ml

@@ -1,13 +1,28 @@
 [%%xlog_import]
 
-let () =
-  Xlog.init_pretty_writer stdout ~min_level:Xlog.DEBUG
+module Submodule = struct
+  [%%xlog_import]
+
+  let do_stuff () =
+    [%xlog warn "meow"]
+end
 
 let () =
-  [%xlog info "meow meow %s %d" "test string" 1337]
-
-let () =
-  try
+  Xlog.init_pretty_writer stdout ~min_level:Xlog.DEBUG;
+  [%xlog info "meow meow %s %d" "test string" 1337];
+  begin try
     failwith "meow2"
   with
   | e -> [%xlog exn e "oop's %d" 42069]
+  end;
+  [%xlog info "awa"];
+  Submodule.do_stuff ()
+
+module Submodule2 = struct
+  [%%xlog_import]
+
+  let do_stuff () =
+    [%xlog warn "meow"]
+end
+
+let () = Submodule2.do_stuff ()