From 14ced6b533d2ba9fef79711400eeffdb8983ff17 Mon Sep 17 00:00:00 2001
From: Cody Hiar <cody@hiar.ca>
Date: Tue, 16 Nov 2021 21:31:30 -0700
Subject: lsp tab completion

---
 init.lua | 52 ++++++++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 44 insertions(+), 8 deletions(-)

diff --git a/init.lua b/init.lua
index a3bb5ed..e7ee22f 100644
--- a/init.lua
+++ b/init.lua
@@ -194,6 +194,10 @@ return require('packer').startup(function()
     }
     use {
         "neovim/nvim-lspconfig",
+        requires = {
+            {'hrsh7th/nvim-cmp'},
+            {'hrsh7th/cmp-nvim-lsp'},
+        },
         config = function()
             nvim_lsp = require('lspconfig')
             -- Use an on_attach function to only map the following keys
@@ -223,21 +227,60 @@ return require('packer').startup(function()
                 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)
-
             end
 
             -- Use a loop to conveniently call 'setup' on multiple servers and
             -- map buffer local keybindings when the language server attaches
             -- local servers = { 'pyls', 'rust_analyzer', 'tsserver' }
             local servers = { 'pyright', 'bashls' }
+            -- Add additional capabilities supported by nvim-cmp
+            local capabilities = vim.lsp.protocol.make_client_capabilities()
+            capabilities = require('cmp_nvim_lsp').update_capabilities(capabilities)
+            -- Setup language servers
             for _, lsp in ipairs(servers) do
                 nvim_lsp[lsp].setup {
                     on_attach = on_attach,
                     flags = {
                         debounce_text_changes = 150,
                     },
+                    capabilities = capabilities,
                 }
             end
+            -- Set completeopt to have a better completion experience
+            vim.o.completeopt = 'menuone,noselect'
+            -- nvim-cmp setup
+            local cmp = require 'cmp'
+            cmp.setup {
+              mapping = {
+                ['<C-p>'] = cmp.mapping.select_prev_item(),
+                ['<C-n>'] = cmp.mapping.select_next_item(),
+                ['<C-d>'] = cmp.mapping.scroll_docs(-4),
+                ['<C-f>'] = cmp.mapping.scroll_docs(4),
+                ['<C-Space>'] = cmp.mapping.complete(),
+                ['<C-e>'] = cmp.mapping.close(),
+                ['<CR>'] = cmp.mapping.confirm {
+                  behavior = cmp.ConfirmBehavior.Replace,
+                  select = true,
+                },
+                ['<Tab>'] = function(fallback)
+                  if cmp.visible() then
+                    cmp.select_next_item()
+                  else
+                    fallback()
+                  end
+                end,
+                ['<S-Tab>'] = function(fallback)
+                  if cmp.visible() then
+                    cmp.select_prev_item()
+                  else
+                    fallback()
+                  end
+                end,
+              },
+              sources = {
+                { name = 'nvim_lsp' },
+              },
+            }
         end,
     }
     use 'nvim-treesitter/playground'
@@ -377,13 +420,6 @@ return require('packer').startup(function()
             require'hop'.setup { keys = 'etovxqpdygfblzhckisuran' }
         end
     }
-    use {
-        'ervandew/supertab',
-        config = function()
-            -- Default to scrolling down the list
-            vim.g.SuperTabDefaultCompletionType = "<c-n>"
-        end
-    }
 -- The treesitter for nix doesn't do indents
     use 'LnL7/vim-nix'
     use {
-- 
cgit v1.2.3