Feat: code formating with null-ls

nvim/.config/nvim/lua/config/null-ls.lua

@@ -0,0 +1,21 @@
+local null_ls_status_ok, null_ls = pcall(require, "null-ls")
+if not null_ls_status_ok then
+  return
+end
+
+-- https://github.com/jose-elias-alvarez/null-ls.nvim/tree/main/lua/null-ls/builtins/formatting
+local formatting = null_ls.builtins.formatting
+-- https://github.com/jose-elias-alvarez/null-ls.nvim/tree/main/lua/null-ls/builtins/diagnostics
+local diagnostics = null_ls.builtins.diagnostics
+
+null_ls.setup {
+  debug = false,
+  sources = {
+    formatting.prettier.with { extra_args = { "--no-semi", "--single-quote", "--jsx-single-quote" } },
+    formatting.black.with { extra_args = { "--fast" } },
+    diagnostics.flake8,
+  },
+}
+
+local map = vim.api.nvim_set_keymap
+map('n', '<leader>f', '<cmd>lua vim.lsp.buf.formatting_sync()<cr>', {})

nvim/.config/nvim/lua/plugins.lua

@@ -78,6 +78,12 @@ return packer.startup(function(use)
     use {'hrsh7th/cmp-nvim-lsp', after = 'nvim-cmp'}
     -- use {'f3fora/cmp-spell', after = 'nvim-cmp'}
 
+    -- for formatters and linters
+    use {
+        "jose-elias-alvarez/null-ls.nvim",
+        config = [[require('config.null-ls')]]
+    }
+
 
     use 'nvim-lua/popup.nvim'
     use {