update

README.md

@@ -6,7 +6,7 @@ autosave.nvim is a Neovim and Vim plugin that provides automatic saving function
 
 # Installation
 
-This plugin requires Neovim or Vim >=8.2 compiled with Lua support. You can check if your version of Vim supports Lua by running `:echo has("lua")` in the editor.
+This plugin requires Neovim >=0.9 or Vim >=8.2 compiled with Lua support. You can check if your version of Vim supports Lua by running `:echo has("lua")` in the editor.
 
 <details>
 <summary>Using lazy.nvim (recommended) 💤</summary>

lua/autosave/health.lua

@@ -0,0 +1,20 @@
+if vim.fn.has('nvim') == 0 then
+	print("`:checkhealth` is only supported in Neovim")
+	return
+end
+
+local M = {}
+
+local health = vim.health
+
+M.check = function()
+	health.start('Check requirements')
+	local vimver = string.format('%s.%s.%s', vim.version().major, vim.version().minor, vim.version().patch)
+	if vim.fn.has('nvim-0.9') == 0 then
+		health.warn('Neovim version is too old', 'Update to Neovim 0.9 or later')
+	else
+		health.ok('Neovim version is up to date', vimver)
+	end
+end
+
+return M

plugin/autosave.vim

@@ -1,13 +1,15 @@
 let compatible = v:false
-if has('nvim')
+let min_nvim = '0.9'
+let min_vim = '8.2.0'
+if has('nvim-' .. min_nvim)
 	let compatible = v:true
 endif
-if has("patch-8.2.1066") && has("lua")
+if has("patch-" .. min_vim) && has("lua")
 	let compatible = v:true
 endif
 
 if !compatible
-	echoerr "autosave.vim requires Neovim or Vim >= 8.2.1066 with Lua support"
+	echoerr printf("autosave.vim requires Neovim %s or Vim %s with +lua feature", min_nvim, min_vim)
 	finish
 endif