feat: add mfussenegger/nvim-lint

- Add and configure mfussenegger/nvim-lint.
- Remove the golangci-lint-langserver from the LSP configuration.

nvim/lua/autocommands.lua

@@ -4,3 +4,15 @@ vim.api.nvim_create_autocmd('BufWritePre', {
     vim.lsp.buf.code_action({ context = { only = { 'source.organizeImports' } }, apply = true })
   end
 })
+
+vim.api.nvim_create_autocmd('BufWritePost', {
+  callback = function()
+    local ok, lint = pcall(require, "lint")
+
+    if not ok then
+      return
+    end
+
+    lint.try_lint()
+  end
+})

nvim/lua/plugins/config/lint.lua

@@ -0,0 +1,11 @@
+local ok, lint = pcall(require, "lint")
+
+if not ok then
+  return
+end
+
+lint.linters_by_ft = {
+  go = {'golangcilint'},
+  sh = {'shellcheck'},
+  python = {'pylint'},
+}

nvim/lua/plugins/config/lsp.lua

@@ -63,12 +63,6 @@ lspconfig.gopls.setup{
   flags = lsp_flags,
 }
 
--- Golangci-lint language server
--- requires golangci-lint and golangci-lint-langserver
-lspconfig.golangci_lint_ls.setup{
-  flags = lsp_flags,
-}
-
 -- Jsonnet
 lspconfig.jsonnet_ls.setup{
   on_attach = custom_attach,

nvim/lua/plugins/init.lua

@@ -54,6 +54,13 @@ local plugins = {
       require("plugins.config.tui_nvim")
     end,
   },
+  {
+    "mfussenegger/nvim-lint",
+    commit = "67f74e630a84ecfa73a82783c487bdedd8cecdc3",  -- 2023.09.21
+    config = function()
+      require("plugins.config.lint")
+    end,
+  },
 }
 
 require("lazy").setup(plugins, {