feat: add file size in popup (#1049)

lua/nvim-tree/utils.lua

@@ -245,4 +245,19 @@ function M.table_create_missing(tbl, sub)
   return t
 end
 
+function M.format_bytes(bytes)
+  local units = {'B', 'K', 'M', 'G', 'T'}
+
+  bytes = math.max(bytes, 0)
+  local pow = math.floor((bytes and math.log(bytes) or 0) / math.log(1024))
+  pow = math.min(pow, #units)
+
+  local value = bytes / (1024 ^ pow)
+  value = math.floor((value * 10) + 0.5) / 10
+
+  pow = pow + 1
+
+  return (units[pow] == nil) and (bytes .. 'B') or (value .. units[pow])
+end
+
 return M