From 6deaa64e7130a273a97e8e5b96d288e4077db774 Mon Sep 17 00:00:00 2001
From: Daniil Tsivinsky <daniil@tsivinsky.com>
Date: Sat, 11 Dec 2021 23:22:51 +0300
Subject: [PATCH] Update neovim config for better Go development

---
 config/nvim/init.lua    |  3 ++-
 config/nvim/lua/lsp.lua | 45 ++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 46 insertions(+), 2 deletions(-)

diff --git a/config/nvim/init.lua b/config/nvim/init.lua
index ec5d3ce..a141a5a 100644
--- a/config/nvim/init.lua
+++ b/config/nvim/init.lua
@@ -103,7 +103,8 @@ vim.g.mapleader = " "
 
 vim.g.qs_highlight_on_keys = {"f", "F"}
 
-vim.cmd([[autocmd BufWritePre * undojoin | Neoformat]])
+vim.cmd(
+    [[autocmd BufWritePre *.js,*.jsx,*.ts,*.tsx,*.html,*.css,*.scss,*.json undojoin | Neoformat]])
 
 require("lsp")
 
diff --git a/config/nvim/lua/lsp.lua b/config/nvim/lua/lsp.lua
index b99c338..5a3b6a5 100644
--- a/config/nvim/lua/lsp.lua
+++ b/config/nvim/lua/lsp.lua
@@ -140,9 +140,52 @@ nvim_lsp.ls_emmet.setup({capabilities = capabilities})
 
 nvim_lsp.gopls.setup({
     capabilities = capabilities,
-    on_attach = function() setupLspSignature() end
+    on_attach = function() setupLspSignature() end,
+    settings = {
+      gopls = {
+        experimentalPostfixCompletions = true,
+        analyses = {
+          unusedparams = true,
+          shadow = true
+        },
+        staticcheck = true
+      }
+    }
 })
 
+function goimports(timeout_ms)
+  local context = { only = { "source.organizeImports" } }
+  vim.validate { context = { context, "t", true } }
+
+  local params = vim.lsp.util.make_range_params()
+  params.context = context
+
+  -- See the implementation of the textDocument/codeAction callback
+  -- (lua/vim/lsp/handler.lua) for how to do this properly.
+  local result = vim.lsp.buf_request_sync(0, "textDocument/codeAction", params, timeout_ms)
+  if not result or next(result) == nil then return end
+  local actions = result[1].result
+  if not actions then return end
+  local action = actions[1]
+
+  -- textDocument/codeAction can return either Command[] or CodeAction[]. If it
+  -- is a CodeAction, it can have either an edit, a command or both. Edits
+  -- should be executed first.
+  if action.edit or type(action.command) == "table" then
+    if action.edit then
+      vim.lsp.util.apply_workspace_edit(action.edit)
+    end
+    if type(action.command) == "table" then
+      vim.lsp.buf.execute_command(action.command)
+    end
+  else
+    vim.lsp.buf.execute_command(action)
+  end
+end
+
+vim.cmd([[autocmd BufWritePre *.go lua vim.lsp.buf.formatting_sync()]])
+vim.cmd([[autocmd BufWritePre *.go lua goimports(1000)]])
+
 require("luasnip/loaders/from_vscode").load({
     include = {"javascript", "typescript", "go", "html"}
 })