From 70173c466a3745535a1c198a9994b73c96ec4248 Mon Sep 17 00:00:00 2001
From: Santo Cariotti <santo@dcariotti.me>
Date: Tue, 26 Oct 2021 19:13:16 +0200
Subject: nvim: better lsp

---
 nvim/init.vim    | 14 +++++++++++---
 nvim/lua/lsp.lua | 45 ++++++++++++++++++++++++++++-----------------
 2 files changed, 39 insertions(+), 20 deletions(-)

diff --git a/nvim/init.vim b/nvim/init.vim
index a886b21..a0d4d6f 100644
--- a/nvim/init.vim
+++ b/nvim/init.vim
@@ -5,7 +5,8 @@ Plug 'rust-lang/rust.vim'
 Plug 'nvim-lua/plenary.nvim'
 Plug 'lewis6991/gitsigns.nvim'
 "Plug 'vim-airline/vim-airline'
-Plug 'shadmansaleh/lualine.nvim'
+Plug 'nvim-lualine/lualine.nvim'
+Plug 'kyazdani42/nvim-web-devicons'
 Plug 'junegunn/fzf', {'dir': '~/.fzf', 'do': './install --all'} | Plug 'junegunn/fzf.vim' " fuzzy finder
 Plug 'luochen1990/rainbow' " color parentheses
 Plug 'dense-analysis/ale' " checker syntax
@@ -27,8 +28,13 @@ Plug 'ellisonleao/gruvbox.nvim'
 " LSP
 if has('nvim')
     Plug 'neovim/nvim-lspconfig'
-    Plug 'nvim-lua/lsp_extensions.nvim'
-    Plug 'nvim-lua/completion-nvim'
+    Plug 'hrsh7th/cmp-nvim-lsp'
+    Plug 'hrsh7th/cmp-buffer'
+    Plug 'hrsh7th/nvim-cmp'
+
+    " For vsnip users.
+    Plug 'hrsh7th/cmp-vsnip'
+    Plug 'hrsh7th/vim-vsnip'
 endif
 
 
@@ -38,6 +44,8 @@ syntax on
 
 set runtimepath+=~/.vim-plugins/LanguageClient-neovim
 
+set completeopt=menu,menuone,noselect
+
 set clipboard=unnamed
 set mouse=a " click with mouse
 set wildmenu
diff --git a/nvim/lua/lsp.lua b/nvim/lua/lsp.lua
index 1a28857..f881977 100644
--- a/nvim/lua/lsp.lua
+++ b/nvim/lua/lsp.lua
@@ -1,14 +1,34 @@
 local nvim_lsp = require('lspconfig')
+local cmp = require'cmp'
+
+cmp.setup({
+  sources = {
+    {name = 'buffer'},
+    {name = 'nvim_lsp'},
+    {name = 'vsnip'},
+  },
+  snippet = {
+    expand = function(args)
+      vim.fn["vsnip#anonymous"](args.body)
+    end,
+  },
+  mapping = {
+    ['<C-Space>'] = cmp.mapping.complete(),
+    ['<C-e>'] = cmp.mapping.close(),
+    ['<CR>'] = cmp.mapping.confirm({ select = true }),
+  },
+  documentation = {
+    border = 'rounded',
+  },
+})
 
 -- Use an on_attach function to only map the following keys
 -- after the language server attaches to the current buffer
+
 local on_attach = function(client, bufnr)
   local function buf_set_keymap(...) vim.api.nvim_buf_set_keymap(bufnr, ...) end
   local function buf_set_option(...) vim.api.nvim_buf_set_option(bufnr, ...) end
 
-  -- Enable completion triggered by <c-x><c-o>
-  buf_set_option('omnifunc', 'v:lua.vim.lsp.omnifunc')
-
   -- Mappings.
   local opts = { noremap=true, silent=true }
 
@@ -17,29 +37,20 @@ local on_attach = function(client, bufnr)
   buf_set_keymap('n', 'gd', '<cmd>lua vim.lsp.buf.definition()<CR>', opts)
   buf_set_keymap('n', 'K', '<cmd>lua vim.lsp.buf.hover()<CR>', opts)
   buf_set_keymap('n', 'gi', '<cmd>lua vim.lsp.buf.implementation()<CR>', opts)
-  buf_set_keymap('n', '<C-k>', '<cmd>lua vim.lsp.buf.signature_help()<CR>', opts)
-  buf_set_keymap('n', '<space>wa', '<cmd>lua vim.lsp.buf.add_workspace_folder()<CR>', opts)
-  buf_set_keymap('n', '<space>wr', '<cmd>lua vim.lsp.buf.remove_workspace_folder()<CR>', opts)
-  buf_set_keymap('n', '<space>wl', '<cmd>lua print(vim.inspect(vim.lsp.buf.list_workspace_folders()))<CR>', opts)
-  buf_set_keymap('n', '<space>D', '<cmd>lua vim.lsp.buf.type_definition()<CR>', opts)
-  buf_set_keymap('n', '<space>rn', '<cmd>lua vim.lsp.buf.rename()<CR>', opts)
-  buf_set_keymap('n', '<space>ca', '<cmd>lua vim.lsp.buf.code_action()<CR>', opts)
   buf_set_keymap('n', 'gr', '<cmd>lua vim.lsp.buf.references()<CR>', opts)
   buf_set_keymap('n', '<space>e', '<cmd>lua vim.lsp.diagnostic.show_line_diagnostics()<CR>', opts)
   buf_set_keymap('n', '[d', '<cmd>lua vim.lsp.diagnostic.goto_prev()<CR>', opts)
   buf_set_keymap('n', ']d', '<cmd>lua vim.lsp.diagnostic.goto_next()<CR>', opts)
-  buf_set_keymap('n', '<space>q', '<cmd>lua vim.lsp.diagnostic.set_loclist()<CR>', opts)
-  buf_set_keymap('n', '<space>f', '<cmd>lua vim.lsp.buf.formatting()<CR>', opts)
-
-  -- Forward to other plugins
-  require'completion'.on_attach(client)
 end
 
--- Use a loop to conveniently call 'setup' on multiple servers and
+-- Setup lspconfig. 
+ 
+--- Use a loop to conveniently call 'setup' on multiple servers and
 -- map buffer local keybindings when the language server attaches
-local servers = { 'pyright', 'rust_analyzer' }
+local servers = { 'jedi_language_server', 'rust_analyzer', 'tsserver', 'clangd' }
 for _, lsp in ipairs(servers) do
   nvim_lsp[lsp].setup {
+    capabilities = capabilities,
     on_attach = on_attach,
     flags = {
       debounce_text_changes = 150,
-- 
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