fix(configs,sources.path): concat nil when icons disabled (#190)

README.md

@@ -301,19 +301,19 @@ vim.ui.select = require('dropbar.utils.menu').select
     icons = {
       enable = true,
       kinds = {
-        ---Directory icon and highlighting getter, set to `false` to disable
+        ---Directory icon and highlighting getter, set to empty string to disable
         ---@param path string path to the directory
         ---@return string: icon for the directory
         ---@return string?: highlight group for the icon
-        ---@type fun(path: string): string, string?|false
+        ---@type fun(path: string): string, string?|string?
         dir_icon = function(_)
           return M.opts.icons.kinds.symbols.Folder, 'DropBarIconKindFolder'
         end,
-        ---File icon and highlighting getter, set to `false` to disable
+        ---File icon and highlighting getter, set to empty string to disable
         ---@param path string path to the file
         ---@return string: icon for the file
         ---@return string?: highlight group for the icon
-        ---@type fun(path: string): string, string?|false
+        ---@type fun(path: string): string, string?|string?
         file_icon = function(path)
           local icon_kind_opts = M.opts.icons.kinds
           local file_icon = icon_kind_opts.symbols.File
@@ -1443,16 +1443,16 @@ used by the plugin:
 - `opts.icons.enable`: `boolean`
   - Whether to enable icons
   - Default: `true`
-- `opts.icons.kinds.dir_icon`: `fun(path: string): string, string?|false`
-  - Directory icon and highlighting getter, set to `false` to disable
+- `opts.icons.kinds.dir_icon`: `fun(path: string): string, string?|string?`
+  - Directory icon and highlighting getter, set to empty string to disable
   - Default:
     ```lua
     function(_)
       return M.opts.icons.kinds.symbols.Folder, 'DropBarIconKindFolder'
     end
     ```
-- `opts.icons.kinds.file_icon`: `fun(path: string): string, string?|false`
-  - File icon and highlighting getter, set to `false` to disable
+- `opts.icons.kinds.file_icon`: `fun(path: string): string, string?|string?`
+  - File icon and highlighting getter, set to empty string to disable
   - Default:
     ```lua
     function(path)

doc/dropbar.txt

@@ -684,16 +684,16 @@ by the plugin:
 - `opts.icons.enable`: `boolean`
     - Whether to enable icons
     - Default: `true`
-- `opts.icons.kinds.dir_icon`: `fun(path: string): string, string?|false`
-  - Directory icon and highlighting getter, set to `false` to disable
+- `opts.icons.kinds.dir_icon`: `fun(path: string): string, string?|string?`
+  - Directory icon and highlighting getter, set to empty string to disable
   - Default: >lua
 
 	  function(_)
 	    return M.opts.icons.kinds.symbols.Folder, 'DropBarIconKindFolder'
 	  end
 <
-- `opts.icons.kinds.file_icon`: `fun(path: string): string, string?|false`
-  - File icon and highlighting getter, set to `false` to disable
+- `opts.icons.kinds.file_icon`: `fun(path: string): string, string?|string?`
+  - File icon and highlighting getter, set to empty string to disable
   - Default: >lua
 
 	  function(path)

lua/dropbar/configs.lua

@@ -7,19 +7,19 @@ M.opts = {
   icons = {
     enable = true,
     kinds = {
-      ---Directory icon and highlighting getter, set to `false` to disable
+      ---Directory icon and highlighting getter, set to empty string to disable
       ---@param path string path to the directory
       ---@return string: icon for the directory
       ---@return string?: highlight group for the icon
-      ---@type fun(path: string): string, string?|false
+      ---@type fun(path: string): string, string?|string?
       dir_icon = function(_)
         return M.opts.icons.kinds.symbols.Folder, 'DropBarIconKindFolder'
       end,
-      ---File icon and highlighting getter, set to `false` to disable
+      ---File icon and highlighting getter, set to empty string to disable
       ---@param path string path to the file
       ---@return string: icon for the file
       ---@return string?: highlight group for the icon
-      ---@type fun(path: string): string, string?|false
+      ---@type fun(path: string): string, string?|string?
       file_icon = function(path)
         local icon_kind_opts = M.opts.icons.kinds
         local file_icon = icon_kind_opts.symbols.File
@@ -771,8 +771,8 @@ function M.set(new_opts)
         return ' '
       end,
     })
-    M.opts.icons.kinds.dir_icon = false
-    M.opts.icons.kinds.file_icon = false
+    M.opts.icons.kinds.dir_icon = ''
+    M.opts.icons.kinds.file_icon = ''
     M.opts.icons.kinds.symbols = blank_icons
     M.opts.icons.ui.bar = blank_icons
     M.opts.icons.ui.menu = blank_icons