Simplify LSP and remap a few LSP keybindings

init.lua

@@ -3,3 +3,4 @@ require('nvim_opts')	-- Basic vim options
 require('autocmd')	-- Convenient Autocommands
 require('lsp')
 require('keybindings')
+require('nvim-cmp-cfg')

lua/keybindings.lua

@@ -3,28 +3,20 @@ local map = vim.api.nvim_set_keymap
 -- Avoid infinitely recursive definitions
 options = { noremap = true }
 
--- Copy/paste
-map('n', '<leader>y', '"+y', options)
-map('v', '<leader>y', '"+y', options)
-
 -- WINDOW MANAGEMENT
 
--- Move windows TODO
-
 -- Terminal
 map('t', '<C-e>', '<C-\\><C-n>', options) -- Exit Terminal mode enter Normal
 
 -- FILE NAVIGATION
--- NerdTree
+map('n', '<leader>f', '<cmd>Telescope git_files<CR>', options)
-map('n', '<leader>nt', '<cmd>NERDTreeToggle<CR>', options)
+map('n', '<leader>af', '<cmd>Telescope find_files<CR>', options)
-map('n', '<C-p>', '<cmd>Telescope git_files<CR>', options)
-map('n', '<C-f>', '<cmd>Telescope find_files<CR>', options)
 -- Grep project file contents with live results, respecting .gitignore
-map('n', '<leader>ps',  "<cmd>lua require('telescope.builtin').live_grep()<CR>", options)
+map('n', '<leader>g',  "<cmd>lua require('telescope.builtin').live_grep()<CR>", options)
--- Grep for prompted str project wide
-map('n', '<leader>fs',  "<cmd>lua require('telescope.builtin').grep_string({ search = vim.fn.input(\"Grep For > \")})<CR>", options)
 -- Telescope fuzzy search for buffers
-map('n', '<leader>pb', "<cmd>lua require('telescope.builtin').buffers()<CR>", options)
+map('n', '<leader>b', "<cmd>lua require('telescope.builtin').buffers()<CR>", options)
+
+map('n', 'ga', '<C-^><CR>', options) -- ga to switch to last used buffer
 
 -- CODE NAVIGATOIN
 
@@ -66,17 +58,16 @@ local on_attach = function(client, bufnr)
 
 	buf_set_keymap('n', 'gD', '<cmd>lua vim.lsp.buf.declaration()<CR>', options)
 	buf_set_keymap('n', 'gd', '<cmd>lua vim.lsp.buf.definition()<CR>', options)
-	buf_set_keymap('n', '<C-k>', '<cmd>lua vim.lsp.buf.hover()<CR>', options)
+	buf_set_keymap('n', '<leader>k', '<cmd>lua vim.lsp.buf.hover()<CR>', options)
-	buf_set_keymap('n', 'gi', '<cmd>lua vim.lsp.buf.implementation()<CR>', options)
 	buf_set_keymap('n', '<leader>s', '<cmd>lua vim.lsp.buf.signature_help()<CR>', options)
-	buf_set_keymap('n', '<leader>rn', '<cmd>lua vim.lsp.buf.rename()<CR>', options)
+	buf_set_keymap('n', '<leader>r', '<cmd>lua vim.lsp.buf.rename()<CR>', options)
-	buf_set_keymap('n', 'ga', '<cmd>lua vim.lsp.buf.code_action()<CR>', { noremap = true })
+	buf_set_keymap('n', '<leader>a', '<cmd>lua vim.lsp.buf.code_action()<CR>', { noremap = true })
 	buf_set_keymap('n', 'gr', '<cmd>lua vim.lsp.buf.references()<CR>', options)
 	buf_set_keymap('n', '<leader>d', '<cmd>lua vim.lsp.diagnostic.show_line_diagnostics()<CR>', options)
 	buf_set_keymap('n', '[d', '<cmd>lua vim.lsp.diagnostic.goto_prev()<CR>', options)
 	buf_set_keymap('n', ']d', '<cmd>lua vim.lsp.diagnostic.goto_next()<CR>', options)
-	buf_set_keymap('n', '<leader>q', '<cmd>lua vim.diagnostic.set_qflist()<CR>', options)
+	buf_set_keymap('n', '<leader>Q', '<cmd>lua vim.diagnostic.set_qflist()<CR>', options)
-	buf_set_keymap('n', '<leader>f', '<cmd>lua vim.lsp.buf.formatting()<CR>', options)
+	buf_set_keymap('n', '<leader>F', '<cmd>lua vim.lsp.buf.formatting()<CR>', options)
 
 end
 

lua/lsp.lua

@@ -1,11 +1,14 @@
 local on_attach = require'keybindings'.on_attach
-local capabilities = require'cmp_nvim_lsp'.update_capabilities(vim.lsp.protocol.make_client_capabilities())
+-- Add additional capabilities supported by nvim-cmp
-local cmp = require'nvim-cmp-cfg'.cmp
+local capabilities = vim.lsp.protocol.make_client_capabilities()
+capabilities = require('cmp_nvim_lsp').update_capabilities(capabilities)
+
+local lspconfig = require('lspconfig')
 
 -- SERVERS
 -- rust_analyzer
 vim.g.rustfmt_autosave = 1
-require'lspconfig'.rust_analyzer.setup{
+lspconfig.rust_analyzer.setup{
 	on_attach = on_attach,
 	capabilities = capabilities,
 	settings = {
@@ -20,3 +23,9 @@ require'lspconfig'.rust_analyzer.setup{
 		}
 	}
 }
+
+-- clangd
+lspconfig.clangd.setup{
+	on_attach = on_attach,
+	capabilities = capabilities,
+}

lua/nvim-cmp-cfg.lua

@@ -1,56 +1,47 @@
--- TODO: Improve docs
+-- luasnip setup
--- Setup nvim-cmp.
+local luasnip = require 'luasnip'
-local cmp = require'cmp'
 
--- Ensure vsnip is installed
+-- nvim-cmp setup
-require'cmp_vsnip'
+local cmp = require 'cmp'
-
+cmp.setup {
-cmp.setup({
 	snippet = {
 		expand = function(args)
-      vim.fn["vsnip#anonymous"](args.body)
+			luasnip.lsp_expand(args.body)
 		end,
 	},
-  mapping = {
+	window = {
-    ['<C-Space>'] = cmp.mapping(cmp.mapping.complete(), { 'i', 'c' }),
+		completion = cmp.config.window.bordered(),
-    ['<CR>'] = cmp.mapping.confirm({ select = true }),
+		documentation = cmp.config.window.bordered(),
-	['<Tab>'] = function(fallback)
+	},
+	mapping = cmp.mapping.preset.insert({
+		['<C-j>'] = cmp.mapping.scroll_docs(4),
+		['<C-k>'] = cmp.mapping.scroll_docs(-4),
+		['<C-Space>'] = cmp.mapping.complete(),
+		['<CR>'] = cmp.mapping.confirm {
+			behavior = cmp.ConfirmBehavior.Replace,
+			select = true,
+		},
+		['<C-n>'] = cmp.mapping(function(fallback)
 			if cmp.visible() then
 				cmp.select_next_item()
+			elseif luasnip.expand_or_jumpable() then
+				luasnip.expand_or_jump()
 			else
 				fallback()
 			end
-    end,
+		end, { 'i', 's' }),
-    ['<S-Tab>'] = function(fallback)
+		['<C-p>'] = cmp.mapping(function(fallback)
 			if cmp.visible() then
 				cmp.select_prev_item()
+			elseif luasnip.jumpable(-1) then
+				luasnip.jump(-1)
 			else
 				fallback()
 			end
-    end,
+		end, { 'i', 's' }),
-  },
-  sources = cmp.config.sources({
-    { name = 'nvim_lsp' },
-    { name = 'vsnip' },
-  }, {
-    { name = 'buffer' },
 	}),
-})
-
--- Use buffer source for `/` (if you enabled `native_menu`, this won't work anymore).
-cmp.setup.cmdline('/', {
 	sources = {
-    { name = 'buffer' }
+		{ name = 'nvim_lsp' },
-  }
+		--{ name = 'luasnip' },
-})
+	},
-
+}
--- Use cmdline & path source for ':' (if you enabled `native_menu`, this won't work anymore).
-cmp.setup.cmdline(':', {
-  sources = cmp.config.sources({
-    { name = 'path' }
-  }, {
-    { name = 'cmdline' }
-  })
-})
-
-return { cmp = cmp }

lua/plugins.lua

@@ -14,28 +14,24 @@ local plugins = require('packer').startup(function(use)
 			commit = '80cdb00b221f69348afc4fb4b701f51eb8dd3120', -- for neovim 0.5.0 compatibility
 	    requires = { {'nvim-lua/plenary.nvim'} }
     }
-	use 'preservim/nerdtree'
 
 	-- git
 	use 'tpope/vim-fugitive'
 
 	-- LSP
 	use 'neovim/nvim-lspconfig' -- Common lsp server configurations
-	use 'tjdevries/lsp_extensions.nvim' -- Provides type inlay hint support
+	use 'hrsh7th/nvim-cmp' -- Autocompletion plugin
-	use 'hrsh7th/cmp-nvim-lsp'	-- Completion LSP integeration
+	use 'hrsh7th/cmp-nvim-lsp' -- LSP source for nvim-cmp
-	use 'hrsh7th/cmp-buffer'
-	use 'hrsh7th/cmp-path'
-	use 'hrsh7th/cmp-cmdline'
-	use 'hrsh7th/nvim-cmp'		-- Autocompletion
 
-	-- Snippets (Required for nvim-cmp)
+	-- LSP Extensions
-	use 'hrsh7th/cmp-vsnip'
+	use 'nvim-lua/lsp_extensions.nvim'
-	use 'hrsh7th/vim-vsnip'
+
+	-- Snippets (required for nvim-cmp)
+	use 'L3MON4D3/LuaSnip'
+	use 'saadparwaiz1/cmp_luasnip'
 
 	-- Language Specfic
 	use 'rust-lang/rust.vim'
-	use 'cespare/vim-toml'
-	use 'stephpy/vim-yaml'
 
   if packer_bootstrap then
     require('packer').sync()

lua/ts-context.lua

@@ -0,0 +1,22 @@
+require('treesitter-context').setup{
+    enable = true, -- Enable this plugin (Can be enabled/disabled later via commands)
+    throttle = true, -- Throttles plugin updates (may improve performance)
+    max_lines = 0, -- How many lines the window should span. Values <= 0 mean no limit.
+    patterns = { -- Match patterns for TS nodes. These get wrapped to match at word boundaries.
+        -- For all filetypes
+        default = {
+            'class',
+            'function',
+            'method',
+            'for',
+            'while',
+            -- 'if',
+            -- 'switch',
+            -- 'case',
+        },
+        rust = {
+			'loop_expression',
+			'impl_item',
+        },
+    },
+}