Enable inotify specific api only on linux

data/core/init.lua

@@ -155,13 +155,15 @@ function core.project_subdir_set_show(dir, filename, show)
   dir.shown_subdir[filename] = show
   if dir.files_limit then
     local fullpath = dir.name .. PATHSEP .. filename
-    if show then
-      local success = system.watch_dir_add(dir.watch_id, fullpath)
-      print("DEBUG: watch_dir_add", fullpath, "success:", success)
-    else
-      print("DEBUG dir", dir.name, "filename", filename, "watch_id:", dir.watch_id)
-      local success = system.watch_dir_rm(dir.watch_id, fullpath)
-      print("DEBUG: watch_dir_rm", fullpath, "success:", success)
+    if PLATFORM == "Linux" then
+      if show then
+        local success = system.watch_dir_add(dir.watch_id, fullpath)
+        print("DEBUG: watch_dir_add", fullpath, "success:", success)
+      else
+        print("DEBUG dir", dir.name, "filename", filename, "watch_id:", dir.watch_id)
+        local success = system.watch_dir_rm(dir.watch_id, fullpath)
+        print("DEBUG: watch_dir_rm", fullpath, "success:", success)
+      end
     end
   end
 end
@@ -187,8 +189,10 @@ local function scan_project_folder(index)
   if entries_count > config.max_project_files then
     print("DEBUG setting files limit FLAG for", dir.name)
     dir.files_limit = true
-    -- Watch non-recursively
-    dir.watch_id = system.watch_dir(dir.name, false)
+    -- Watch non-recursively on Linux only.
+    -- The reason is recursively watching with dmon on linux
+    -- doesn't work on very large directories.
+    dir.watch_id = system.watch_dir(dir.name, PLATFORM ~= "Linux")
     if core.status_view then -- May be not yet initialized.
       show_max_files_warning()
     end

src/api/system.c

@@ -656,6 +656,7 @@ static int f_watch_dir(lua_State *L) {
   return 1;
 }
 
+#if __linux__
 static int f_watch_dir_add(lua_State *L) {
   dmon_watch_id watch_id;
   watch_id.id = luaL_checkinteger(L, 1);
@@ -672,6 +673,7 @@ static int f_watch_dir_rm(lua_State *L) {
   lua_pushboolean(L, dmon_watch_rm(watch_id, subdir));
   return 1;
 }
+#endif
 
 #ifdef _WIN32
 #define PATHSEP '\\'
@@ -758,9 +760,11 @@ static const luaL_Reg lib[] = {
   { "fuzzy_match",         f_fuzzy_match         },
   { "set_window_opacity",  f_set_window_opacity  },
   { "watch_dir",           f_watch_dir           },
+  { "path_compare",        f_path_compare        },
+#if __linux__
   { "watch_dir_add",       f_watch_dir_add       },
   { "watch_dir_rm",        f_watch_dir_rm        },
-  { "path_compare",        f_path_compare        },
+#endif
   { NULL, NULL }
 };