file devicon uses library to fall back

lua/nvim-tree/node/file.lua

@@ -74,16 +74,9 @@ function FileNode:highlighted_icon()
 
   local str, hl
 
-  -- devicon if enabled and available
+  -- devicon if enabled and available, fallback to default
   if self.explorer.opts.renderer.icons.web_devicons.file.enable then
-    str, hl = icons.get_icon(self.name)
-    if not str then
-      local default_icon = icons.get_default_icon()
-      if default_icon then
-        str = default_icon.icon
-        hl = "DevIcon" .. default_icon.name
-      end
-    end
+    str, hl = icons.get_icon(self.name, nil, { default = true })
     if not self.explorer.opts.renderer.icons.web_devicons.file.color then
       hl = nil
     end

lua/nvim-tree/renderer/components/icons.lua

@@ -1,50 +1,33 @@
----@class DevIcon
----@field icon string
----@field color string
----@field cterm_color string
----@field name string
+---@alias devicons_get_icon fun(name: string, ext: string?, opts: table?): string?, string?
+---@alias devicons_setup fun(opts: table?)
 
----@class DevIcons
----@field get_icon fun(name: string, ext: string?): string?, string?
----@field get_default_icon fun(): DevIcon
+---@class DevIcons?
+---@field setup devicons_setup
+---@field get_icon devicons_get_icon
+local devicons
 
-local M = {
-  ---@type DevIcons?
-  devicons = nil,
-}
+local M = {}
 
 ---Wrapper around nvim-web-devicons, nils if devicons not available
----@param name string
----@return string? icon
----@return string? hl_group
-function M.get_icon(name)
-  if M.devicons then
-    return M.devicons.get_icon(name, nil)
+---@type devicons_get_icon
+function M.get_icon(name, ext, opts)
+  if devicons then
+    return devicons.get_icon(name, ext, opts)
   else
     return nil, nil
   end
 end
 
----Wrapper around nvim-web-devicons, nil if devicons not available
----@return DevIcon?
-function M.get_default_icon()
-  if M.devicons then
-    return M.devicons.get_default_icon()
-  else
-    return nil
-  end
-end
-
 ---Attempt to use nvim-web-devicons if present and enabled for file or folder
 ---@param opts table
 function M.setup(opts)
   if opts.renderer.icons.show.file or opts.renderer.icons.show.folder then
-    local devicons_ok, devicons = pcall(require, "nvim-web-devicons")
-    if devicons_ok then
-      M.devicons = devicons
+    local ok, di = pcall(require, "nvim-web-devicons")
+    if ok then
+      devicons = di
 
       -- does nothing if already called i.e. don't clobber previous user setup
-      M.devicons.setup()
+      devicons.setup()
     end
   end
 end