Add SessionRenamed hook

doc/pages/hooks.asciidoc

@@ -144,6 +144,9 @@ name. Hooks with no description will always use an empty string.
 *ClientRenamed* `<old name>:<new name>`::
     executed when a client is renamed using the `rename-client` command
 
+*SessionRenamed* `<old name>:<new name>`::
+    executed when a session is renamed using the `rename-session` command
+
 *RuntimeError* `error message`::
     an error was encountered while executing a user command
 

src/commands.cc

@@ -2577,10 +2577,12 @@ const CommandDesc rename_session_cmd = {
     CommandFlags::None,
     CommandHelper{},
     make_single_word_completer([](const Context&){ return Server::instance().session(); }),
-    [](const ParametersParser& parser, Context&, const ShellContext&)
+    [](const ParametersParser& parser, Context& ctx, const ShellContext&)
     {
+        String old_name = Server::instance().session();
         if (not Server::instance().rename_session(parser[0]))
             throw runtime_error(format("unable to rename current session: '{}' may be already in use", parser[0]));
+        ctx.hooks().run_hook(Hook::SessionRenamed, format("{}:{}", old_name, Server::instance().session()), ctx);
     }
 };
 

src/hook_manager.hh

@@ -31,6 +31,7 @@ enum class Hook
     ClientCreate,
     ClientClose,
     ClientRenamed,
+    SessionRenamed,
     InsertChar,
     InsertDelete,
     InsertIdle,
@@ -77,6 +78,7 @@ constexpr auto enum_desc(Meta::Type<Hook>)
         {Hook::ClientCreate, "ClientCreate"},
         {Hook::ClientClose, "ClientClose"},
         {Hook::ClientRenamed, "ClientRenamed"},
+        {Hook::SessionRenamed, "SessionRenamed"},
         {Hook::InsertChar, "InsertChar"},
         {Hook::InsertDelete, "InsertDelete"},
         {Hook::InsertIdle, "InsertIdle"},