feat: add new filesize component

README.md

@@ -186,6 +186,7 @@ sections = {lualine_a = {'mode'}}
 * `encoding` (file encoding)
 * `fileformat` (file format)
 * `filename`
+* `filesize`
 * `filetype`
 * `hostname`
 * `location` (location in file in line:column format)

doc/lualine.txt

@@ -128,6 +128,7 @@ Available components~
         *   |encoding| (file encoding)
         *   |fileformat| (file format)
         *   |filename|
+        *   |filesize|
         *   |filetype|
         *   |hostname|
         *   |location| (location in file in line:column format)

examples/evil_lualine.lua

@@ -116,22 +116,7 @@ ins_left {
 
 ins_left {
   -- filesize component
-  function()
-    local function format_file_size(file)
-      local size = vim.fn.getfsize(file)
-      if size <= 0 then return '' end
-      local sufixes = {'b', 'k', 'm', 'g'}
-      local i = 1
-      while size > 1024 do
-        size = size / 1024
-        i = i + 1
-      end
-      return string.format('%.1f%s', size, sufixes[i])
-    end
-    local file = vim.fn.expand('%:p')
-    if string.len(file) == 0 then return '' end
-    return format_file_size(file)
-  end,
+  'filesize',
   condition = conditions.buffer_not_empty
 }
 

lua/lualine/components/filesize.lua

@@ -0,0 +1,23 @@
+-- Copyright (c) 2020-2021 shadmansaleh
+-- MIT license, see LICENSE for more details.
+local M = require('lualine.component'):new()
+
+M.update_status = function()
+  local file = vim.fn.expand('%:p')
+  if file == nil or #file == 0 then return '' end
+
+  local size = vim.fn.getfsize(file)
+  if size <= 0 then return '' end
+
+  local sufixes = {'b', 'k', 'm', 'g'}
+
+  local i = 1
+  while size > 1024 and i < #sufixes do
+    size = size / 1024
+    i = i + 1
+  end
+
+  return string.format('%.1f%s', size, sufixes[i])
+end
+
+return M