LunarVim/lua/core/formatter.lua

-- autoformat
if O.format_on_save then
  require("lv-utils").define_augroups {
    autoformat = {
      {
        "BufWritePost",
        "*",
        ":silent FormatWrite",
      },
    },
  }
end

-- -- check if formatter has been defined for the language or not
-- local function formatter_exists(lang_formatter)
--   if lang_formatter == nil then
--     return false
--   end
--   if lang_formatter.exe == nil or lang_formatter.args == nil then
--     return false
--   end
--   return true
-- end

-- returns default formatter for given language
-- local function formatter_return(lang_formatter)
--   return {
--     exe = lang_formatter.exe,
--     args = lang_formatter.args,
--     stdin = not (lang_formatter.stdin ~= nil),
--   }
-- end

-- fill a table like this -> {rust: {exe:"sth",args:{"a","b"},stdin=true},go: {}...}
-- local formatter_filetypes = {}
-- for k, v in pairs(O.lang) do
--   if formatter_exists(v.formatter) then
--     local keys = v.filetypes
--     if keys == nil then
--       keys = { k }
--     end
--     for _, l in pairs(keys) do
--       formatter_filetypes[l] = {
--         function()
--           return formatter_return(v.formatter)
--         end,
--       }
--     end
--   end
-- end

require("formatter").setup {}

if not O.format_on_save then
  vim.cmd [[if exists('#autoformat#BufWritePost')
	:autocmd! autoformat
	endif]]
end