Add lspinstall, fix completion

home/.config/nvim/lua/keybinds.lua

@@ -15,8 +15,6 @@ map('n', '<C-g>', '<cmd>Rg<CR>')
 -- Navigate completions with tab and shift tab
 map('i', '<S-Tab>', 'pumvisible() ? "\\<C-p>" : "\\<Tab>"', {expr = true})
 map('i', '<Tab>', 'pumvisible() ? "\\<C-n>" : "\\<Tab>"', {expr = true})
--- Trigger completion
-map('i', '<C-SPACE>', '<Plug>(completion_trigger)', {silent = true, expr = true})
 
 -- Navigate between buffers
 map('n', '<C-N>', ':bn<CR>', {silent = true})

home/.config/nvim/lua/pluginconf/completion.lua

@@ -1,3 +1,4 @@
-local o = vim.o
+vim.o.completeopt = 'menuone,noinsert,noselect'
 
-o.completeopt = 'menuone,noinsert,noselect'
+-- Enable for all buffers (for now)
+vim.api.nvim_command('autocmd BufEnter * lua require\'completion\'.on_attach()')

home/.config/nvim/lua/pluginconf/lsp.lua

@@ -1,37 +1,108 @@
--- Rust
-require'lspconfig'.rust_analyzer.setup {
-    on_attach = require'completion'.on_attach
+-- keymaps
+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
+
+  buf_set_option('omnifunc', 'v:lua.vim.lsp.omnifunc')
+
+  -- Mappings.
+  local opts = { noremap=true, silent=true }
+  buf_set_keymap('n', 'gD', '<Cmd>lua vim.lsp.buf.declaration()<CR>', opts)
+  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', '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)
+
+  -- Set some keybinds conditional on server capabilities
+  if client.resolved_capabilities.document_formatting then
+    buf_set_keymap("n", "<space>f", "<cmd>lua vim.lsp.buf.formatting()<CR>", opts)
+  elseif client.resolved_capabilities.document_range_formatting then
+    buf_set_keymap("n", "<space>f", "<cmd>lua vim.lsp.buf.range_formatting()<CR>", opts)
+  end
+
+  -- Set autocommands conditional on server_capabilities
+  if client.resolved_capabilities.document_highlight then
+    vim.api.nvim_exec([[
+    augroup lsp_document_highlight
+    autocmd! * <buffer>
+    autocmd CursorHold <buffer> lua vim.lsp.buf.document_highlight()
+    autocmd CursorMoved <buffer> lua vim.lsp.buf.clear_references()
+    augroup END
+    ]], false)
+  end
+end
+--
+-- Configure lua language server for neovim development
+local lua_settings = {
+  Lua = {
+    runtime = {
+      -- LuaJIT in the case of Neovim
+      version = 'LuaJIT',
+      path = vim.split(package.path, ';'),
+    },
+    diagnostics = {
+      -- Get the language server to recognize the `vim` global
+      globals = {'vim'},
+    },
+    workspace = {
+      -- Make the server aware of Neovim runtime files
+      library = {
+        [vim.fn.expand('$VIMRUNTIME/lua')] = true,
+        [vim.fn.expand('$VIMRUNTIME/lua/vim/lsp')] = true,
+      },
+    },
+  }
 }
 
--- Lua
-require'lspconfig'.sumneko_lua.setup {
-    on_attach = require'completion'.on_attach,
-    cmd = {'/usr/bin/lua-language-server'},
-    settings = {
-        Lua = {
-            runtime = {
-                -- Tell the language server which version of Lua you're using (most likely LuaJIT in the case of Neovim)
-                version = 'LuaJIT',
-                -- Setup your lua path
-                path = vim.split(package.path, ';')
-            },
-            diagnostics = {
-                -- Get the language server to recognize the `vim` global
-                globals = {'vim'}
-            },
-            workspace = {
-                -- Make the server aware of Neovim runtime files
-                library = {
-                    [vim.fn.expand('$VIMRUNTIME/lua')] = true,
-                    [vim.fn.expand('$VIMRUNTIME/lua/vim/lsp')] = true
-                }
-            }
-        }
-    }
+-- config that activates keymaps and enables snippet support
+local function make_config()
+	local capabilities = vim .lsp.protocol.make_client_capabilities()
+	capabilities.textDocument.completion.completionItem.snippetSupport = true
+	return {
+		-- enable snippet support
+		capabilities = capabilities,
+		-- map buffer local keybindings when the language server attaches
+		on_attach = on_attach,
 }
+end
 
--- YAML
-require'lspconfig'.yamlls.setup {on_attach = require'completion'.on_attach}
+-- lsp-install
+local function setup_servers()
+	require'lspinstall'.setup()
 
--- JavaScript / TypeScript
-require'lspconfig'.tsserver.setup {on_attach = require'completion'.on_attach}
+	-- get all installed servers
+	local servers = require'lspinstall'.installed_servers()
+
+	-- add servers to be installed
+	table.insert(servers, "rust_analyzer");
+
+	for _, server in pairs(servers) do
+		local config = make_config()
+
+		-- language specific config
+		if server == "lua" then
+			config.settings = lua_settings
+		end
+
+		-- setup lspconfig for all servers
+		require'lspconfig'[server].setup(config)
+	end
+end
+
+setup_servers()
+
+-- Automatically reload after `:LspInstall <server>` so we don't have to restart neovim
+require'lspinstall'.post_install_hook = function ()
+  setup_servers() -- reload installed servers
+  vim.cmd("bufdo e") -- this triggers the FileType autocmd that starts the server
+end

home/.config/nvim/lua/pluginmanager.lua

@@ -39,6 +39,9 @@ require('packer').startup(function()
     -- Configs for built-in LSP
     use 'neovim/nvim-lspconfig'
 
+	-- Install LSP executables
+	use 'kabouzeid/nvim-lspinstall'
+
     -- Completion framework
     use 'nvim-lua/completion-nvim'