feat(go): add fine-tuned LSP options, add some null-ls sources (#1024)

lua/lazyvim/plugins/extras/lang/go.lua

@@ -23,8 +23,8 @@ return {
         },
       },
       setup = {
-        gopls = function()
-          -- workaround for gopls not supporting semantictokensprovider
+        gopls = function(_, opts)
+          -- workaround for gopls not supporting semanticTokensProvider
           -- https://github.com/golang/go/issues/54531#issuecomment-1464982242
           require("lazyvim.util").on_attach(function(client, _)
             if client.name == "gopls" then
@@ -42,10 +42,61 @@ return {
             end
           end)
           -- end workaround
+          opts.settings = {
+            gopls = {
+              gofumpt = true,
+              codelenses = {
+                gc_details = false,
+                generate = true,
+                regenerate_cgo = true,
+                run_govulncheck = true,
+                test = true,
+                tidy = true,
+                upgrade_dependency = true,
+                vendor = true,
+              },
+              hints = {
+                assignVariableTypes = true,
+                compositeLiteralFields = true,
+                compositeLiteralTypes = true,
+                constantValues = true,
+                functionTypeParameters = true,
+                parameterNames = true,
+                rangeVariableTypes = true,
+              },
+              analyses = {
+                fieldalignment = true,
+                nilness = true,
+                unusedparams = true,
+                unusedwrite = true,
+                useany = true,
+              },
+              usePlaceholders = true,
+              completeUnimported = true,
+              staticcheck = true,
+              directoryFilters = { "-.git", "-.vscode", "-.idea", "-.vscode-test", "-node_modules" },
+              semanticTokens = true,
+            },
+          }
         end,
       },
     },
   },
+  -- Ensure Go tools are installed
+  {
+    "jose-elias-alvarez/null-ls.nvim",
+    opts = function(_, opts)
+      if type(opts.sources) == "table" then
+        local nls = require("null-ls")
+        vim.list_extend(opts.sources, {
+          nls.builtins.code_actions.gomodifytags,
+          nls.builtins.code_actions.impl,
+          nls.builtins.formatting.gofumpt,
+          nls.builtins.formatting.goimports_reviser,
+        })
+      end
+    end,
+  },
   {
     "mfussenegger/nvim-dap",
     optional = true,