fixed lsp keybindings.

They now work on more than just the first buffer you open of a given
filetype.

neovim/.config/nvim/lua/LSPconfig.lua

@@ -2,33 +2,33 @@ local nvim_lsp = require('lspconfig')
 
 -- 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
+local on_attach = function()
+	local function set_keymap(...) vim.api.nvim_set_keymap(...) end
+	local function set_option(...) vim.api.nvim_set_option(...) end
 
 	-- Enable completion triggered by <c-x><c-o>
-	buf_set_option('omnifunc', 'v:lua.vim.lsp.omnifunc')
+	set_option('omnifunc', 'v:lua.vim.lsp.omnifunc')
 
 	-- Mappings.
 	local opts = { noremap=true, silent=true }
 
 	-- See `:help vim.lsp.*` for documentation on any of the below functions
-	buf_set_keymap('', ';lc', '<cmd>lua vim.lsp.buf.declaration()<CR>', opts)
-	buf_set_keymap('', ';lf', '<cmd>lua vim.lsp.buf.definition()<CR>', opts)
-	buf_set_keymap('', ';lh', '<cmd>lua vim.lsp.buf.hover()<CR>', opts)
-	buf_set_keymap('', ';li', '<cmd>lua vim.lsp.buf.implementation()<CR>', opts)
-	buf_set_keymap('', ';ls', '<cmd>lua vim.lsp.buf.signature_help()<CR>', opts)
-	buf_set_keymap('', ';lwa', '<cmd>lua vim.lsp.buf.add_workspace_folder()<CR>', opts)
-	buf_set_keymap('', ';lwr', '<cmd>lua vim.lsp.buf.remove_workspace_folder()<CR>', opts)
-	buf_set_keymap('', ';lw', '<cmd>lua print(vim.inspect(vim.lsp.buf.list_workspace_folders()))<CR>', opts)
-	buf_set_keymap('', ';lt', '<cmd>lua vim.lsp.buf.type_definition()<CR>', opts)
-	buf_set_keymap('', ';lr', '<cmd>lua vim.lsp.buf.rename()<CR>', opts)
-	buf_set_keymap('', ';la', '<cmd>lua vim.lsp.buf.code_action()<CR>', opts)
-	buf_set_keymap('', ';lc', '<cmd>lua vim.lsp.buf.references()<CR>', opts)
-	buf_set_keymap('', ';lo', '<cmd>lua vim.diagnostic.open_float()<CR>', opts)
-	buf_set_keymap('', ';ln', '<cmd>lua vim.diagnostic.goto_prev()<CR>', opts)
-	buf_set_keymap('', ';lp', '<cmd>lua vim.diagnostic.goto_next()<CR>', opts)
-	buf_set_keymap('', ';lm', '<cmd>lua vim.lsp.buf.formatting()<CR>', opts)
+	set_keymap('', ';lc', '<cmd>lua vim.lsp.buf.declaration()<CR>', opts)
+	set_keymap('', ';lf', '<cmd>lua vim.lsp.buf.definition()<CR>', opts)
+	set_keymap('', ';lh', '<cmd>lua vim.lsp.buf.hover()<CR>', opts)
+	set_keymap('', ';li', '<cmd>lua vim.lsp.buf.implementation()<CR>', opts)
+	set_keymap('', ';ls', '<cmd>lua vim.lsp.buf.signature_help()<CR>', opts)
+	set_keymap('', ';lwa', '<cmd>lua vim.lsp.buf.add_workspace_folder()<CR>', opts)
+	set_keymap('', ';lwr', '<cmd>lua vim.lsp.buf.remove_workspace_folder()<CR>', opts)
+	set_keymap('', ';lw', '<cmd>lua print(vim.inspect(vim.lsp.buf.list_workspace_folders()))<CR>', opts)
+	set_keymap('', ';lt', '<cmd>lua vim.lsp.buf.type_definition()<CR>', opts)
+	set_keymap('', ';lr', '<cmd>lua vim.lsp.buf.rename()<CR>', opts)
+	set_keymap('', ';la', '<cmd>lua vim.lsp.buf.code_action()<CR>', opts)
+	set_keymap('', ';lc', '<cmd>lua vim.lsp.buf.references()<CR>', opts)
+	set_keymap('', ';lo', '<cmd>lua vim.diagnostic.open_float()<CR>', opts)
+	set_keymap('', ';ln', '<cmd>lua vim.diagnostic.goto_prev()<CR>', opts)
+	set_keymap('', ';lp', '<cmd>lua vim.diagnostic.goto_next()<CR>', opts)
+	set_keymap('', ';lm', '<cmd>lua vim.lsp.buf.formatting()<CR>', opts)
 
 end
 
@@ -36,7 +36,6 @@ end
 -- map buffer local keybindings when the language server attaches
 local servers = { 'pyright', 'rust_analyzer', 'texlab'}
 for _, lsp in ipairs(servers) do
-	on_attach()
 	nvim_lsp[lsp].setup {
 		flags = {
 			debounce_text_changes = 150,
@@ -48,7 +47,6 @@ end
 local runtime_path = vim.split(package.path, ';')
 table.insert(runtime_path, "lua/?.lua")
 table.insert(runtime_path, "lua/?/init.lua")
-on_attach()
 require'lspconfig'.sumneko_lua.setup {
 	settings = {
 		Lua = {
@@ -73,3 +71,4 @@ require'lspconfig'.sumneko_lua.setup {
 		},
 	},
 }
+on_attach()

neovim/.config/nvim/lua/cmp-lsp.lua

@@ -5,6 +5,7 @@
 local capabilities = vim.lsp.protocol.make_client_capabilities()
 capabilities = require('cmp_nvim_lsp').update_capabilities(capabilities)
 
+local luasnip = require 'luasnip'
 
 local lspconfig = require('lspconfig')
 
@@ -23,6 +24,11 @@ vim.o.completeopt = 'menuone,noselect'
 -- nvim-cmp setup
 local cmp = require 'cmp'
 cmp.setup {
+	snippet = {
+		expand = function(args)
+			require('luasnip').lsp_expand(args.body)
+		end,
+	},
 	mapping = {
 		['<C-p>'] = cmp.mapping.select_prev_item(),
 		['<C-n>'] = cmp.mapping.select_next_item(),
@@ -37,6 +43,8 @@ cmp.setup {
 		['<Tab>'] = function(fallback)
 			if cmp.visible() then
 				cmp.select_next_item()
+			elseif luasnip.expand_or_jumpable() then
+				luasnip.expand_or_jump()
 			else
 				fallback()
 			end
@@ -44,6 +52,8 @@ cmp.setup {
 		['<S-Tab>'] = function(fallback)
 			if cmp.visible() then
 				cmp.select_prev_item()
+			elseif luasnip.jumpable(-1) then
+				luasnip.jump(-1)
 			else
 				fallback()
 			end
@@ -51,5 +61,7 @@ cmp.setup {
 	},
 	sources = {
 		{ name = 'nvim_lsp' },
+		{ name = 'luasnip' },
+		{ name = 'buffer' }
 	},
 }

neovim/.config/nvim/lua/packages.lua

@@ -90,6 +90,8 @@ return require('packer').startup(function(use)
 		requires = {
 			'neovim/nvim-lspconfig',
 			'hrsh7th/cmp-nvim-lsp',
+			'saadparwaiz1/cmp_luasnip',
+			'L3MON4D3/LuaSnip'
 		}
 	}