From: Peter Lemenkov <lemenkov@gmail.com>
Date: Mon, 7 Jul 2014 21:32:43 +0400
Subject: [PATCH] Add systemd notification support

Signed-off-by: Peter Lemenkov <lemenkov@gmail.com>

Load module first

Function erlang:function_exported/3 looks only for modules already
loaded. So we have to load module first. We can do it either implicitly
by calling any function from the module (and catch for possible
exceptions if no such module available) or explicitly.

Signed-off-by: Peter Lemenkov <lemenkov@gmail.com>

diff --git a/src/couchdb/couch_server_sup.erl b/src/couchdb/couch_server_sup.erl
index 39a556832..2d25220c3 100644
--- a/src/couchdb/couch_server_sup.erl
+++ b/src/couchdb/couch_server_sup.erl
@@ -108,6 +108,7 @@ start_server(IniFiles) ->
 
     Ip = couch_config:get("httpd", "bind_address"),
     io:format("Apache CouchDB has started. Time to relax.~n"),
+    {module, sd_notify} == code:load_file(sd_notify) andalso sd_notify:sd_notify(0, "READY=1"),
     Uris = [get_uri(Name, Ip) || Name <- [couch_httpd, https]],
     [begin
         case Uri of