Fix undue asserts in dmon_extra

Some asserts are placed in case that can effectively occur
so we remove the assertion and we return false. In turn we
adapt the logic accordingly so when false is returned to add
a watch we do not open that directory.

data/core/init.lua

@@ -224,14 +224,14 @@ end
 
 
 function core.project_subdir_set_show(dir, filename, show)
-  dir.shown_subdir[filename] = show
   if dir.files_limit and not dir.force_rescan then
     local fullpath = dir.name .. PATHSEP .. filename
-    local success = (show and system.watch_dir_add or system.watch_dir_rm)(dir.watch_id, fullpath)
+    if not (show and system.watch_dir_add or system.watch_dir_rm)(dir.watch_id, fullpath) then
-    if not success then
+      return false
-      core.log("Internal warning: error calling system.watch_dir_%s", show and "add" or "rm")
     end
   end
+  dir.shown_subdir[filename] = show
+  return true
 end
 
 

data/plugins/treeview.lua

@@ -230,12 +230,14 @@ function TreeView:on_mouse_pressed(button, x, y, clicks)
     if keymap.modkeys["ctrl"] and button == "left" then
       create_directory_in(hovered_item)
     else
-      hovered_item.expanded = not hovered_item.expanded
       local hovered_dir = core.project_dir_by_name(hovered_item.dir_name)
       if hovered_dir and hovered_dir.files_limit then
-        core.update_project_subdir(hovered_dir, hovered_item.filename, hovered_item.expanded)
+        if not core.project_subdir_set_show(hovered_dir, hovered_item.filename, not hovered_item.expanded) then
-        core.project_subdir_set_show(hovered_dir, hovered_item.filename, hovered_item.expanded)
+          return
         end
+        core.update_project_subdir(hovered_dir, hovered_item.filename, not hovered_item.expanded)
+      end
+      hovered_item.expanded = not hovered_item.expanded
     end
   else
     core.try(function()

lib/dmon/dmon_extra.h

@@ -62,7 +62,6 @@ DMON_API_IMPL bool dmon_watch_add(dmon_watch_id id, const char* watchdir)
         dmon__strcpy(fullpath, sizeof(fullpath), watch->rootdir);
         dmon__strcat(fullpath, sizeof(fullpath), watchdir);
         if (stat(fullpath, &st) != 0 || (st.st_mode & S_IFDIR) == 0) {
-            _DMON_LOG_ERRORF("Watch directory '%s' is not valid", watchdir);
             if (!skip_lock)
                 pthread_mutex_unlock(&_dmon.mutex);
             return false;
@@ -79,7 +78,6 @@ DMON_API_IMPL bool dmon_watch_add(dmon_watch_id id, const char* watchdir)
     // check that the directory is not already added
     for (int i = 0, c = stb_sb_count(watch->subdirs); i < c; i++) {
         if (strcmp(subdir.rootdir, watch->subdirs[i].rootdir) == 0) {
-            _DMON_LOG_ERRORF("Error watching directory '%s', because it is already added.", watchdir);
             if (!skip_lock) 
                 pthread_mutex_unlock(&_dmon.mutex);
             return false;
@@ -92,7 +90,6 @@ DMON_API_IMPL bool dmon_watch_add(dmon_watch_id id, const char* watchdir)
     dmon__strcat(fullpath, sizeof(fullpath), subdir.rootdir);
     int wd = inotify_add_watch(watch->fd, fullpath, inotify_mask);
     if (wd == -1) {
-        _DMON_LOG_ERRORF("Error watching directory '%s'. (inotify_add_watch:err=%d)", watchdir, errno);
         if (!skip_lock)
             pthread_mutex_unlock(&_dmon.mutex);
         return false;
@@ -137,7 +134,6 @@ DMON_API_IMPL bool dmon_watch_rm(dmon_watch_id id, const char* watchdir)
         }
     }
     if (i >= c) {
-        _DMON_LOG_ERRORF("Watch directory '%s' is not valid", watchdir);
         if (!skip_lock)
             pthread_mutex_unlock(&_dmon.mutex);
         return false;