nvim: setup automatic loading with mason and other plugins

.config/nvim/lua/keymap.lua

@@ -65,15 +65,11 @@ vim.api.nvim_set_keymap('n', '<leader>gu', ':diffget //2<CR>', { noremap = true
 vim.api.nvim_set_keymap('n', '<leader>gs', ':G<CR>', { noremap = true })
 
 -- hrsh7th/nvim-cmp
-local on_attach = function(client, bufnr)
+vim.api.nvim_set_keymap('n', 'gD', ':lua vim.lsp.buf.declaration()<CR>', { noremap = true })
-  local function buf_set_keymap(...) vim.api.nvim_buf_set_keymap(bufnr, ...) end
+vim.api.nvim_set_keymap('n', 'gd', ':lua vim.lsp.buf.definition()<CR>', { noremap = true })
-  local function buf_set_option(...) vim.api.nvim_buf_set_option(bufnr, ...) end
+vim.api.nvim_set_keymap('n', 'gy', ':lua vim.lsp.buf.type_definition()<CR>', { noremap = true })
-  local opts = { noremap=true, silent=true }
+vim.api.nvim_set_keymap('n', 'gi', ':lua vim.lsp.buf.implementation()<CR>', { noremap = true })
-  buf_set_keymap('n', 'gD', '<Cmd>lua vim.lsp.buf.declaration()<CR>', opts)
+vim.api.nvim_set_keymap('n', 'gr', ':lua vim.lsp.buf.references()<CR>', { noremap = true })
-  buf_set_keymap('n', 'gd', '<Cmd>lua vim.lsp.buf.definition()<CR>', opts)
+vim.api.nvim_set_keymap('n', 'K', ':lua vim.lsp.buf.hover()<CR>', { noremap = true })
-  buf_set_keymap('n', 'gy', '<cmd>lua vim.lsp.buf.type_definition()<CR>', opts)
+vim.api.nvim_set_keymap('n', '<F5>', ':lua vim.lsp.buf.rename()<CR>', { noremap = true })
-  buf_set_keymap('n', 'gi', '<cmd>lua vim.lsp.buf.implementation()<CR>', opts)
+vim.api.nvim_set_keymap('n', '<F8>', ':lua vim.lsp.buf.format()<CR>', { noremap = true })
-  buf_set_keymap('n', 'gr', '<cmd>lua vim.lsp.buf.references()<CR>', opts)
-  buf_set_keymap('n', 'K', '<Cmd>lua vim.lsp.buf.hover()<CR>', opts)
-  buf_set_keymap('n', '<F5>', '<cmd>lua vim.lsp.buf.rename()<CR>', opts)
-end

.config/nvim/lua/loadplugins.lua

@@ -16,14 +16,8 @@ local packer_bootstrap = ensure_packer()
 
 -- load plugins with packer
 return require("packer").startup(function(use)
-    -- package manager
+    -- package manager (first entry)
-    use 'wbthomason/packer.nvim'
+    use {'wbthomason/packer.nvim'}
-    if packer_bootstrap then
-        require('packer').sync()
-    end
-
-    -- automatic closing of brackets
-    use 'raimondi/delimitmate'
 
     -- improved java syntax highlighting
     use {'uiiaoo/java-syntax.vim',
@@ -43,7 +37,11 @@ return require("packer").startup(function(use)
         requires = 'ryanoasis/vim-devicons'}
 
     -- nim language support
-    use {'zah/nim.vim', ft = {'nim'}}
+    use {'zah/nim.vim',
+        ft = {'nim'}}
+
+    -- automatic closing of brackets
+    use {'windwp/nvim-autopairs'}
 
     -- autocompletion and its sources
     use {'hrsh7th/nvim-cmp',
@@ -53,23 +51,35 @@ return require("packer").startup(function(use)
             'l3mon4d3/luasnip',
             'saadparwaiz1/cmp_luasnip',
             'neovim/nvim-lspconfig',
-            'onsails/lspkind-nvim'}}
+            'onsails/lspkind-nvim',
+            'williamboman/mason.nvim',
+            'williamboman/mason-lspconfig.nvim',
+            'jose-elias-alvarez/null-ls.nvim',
+            'nvim-lua/plenary.nvim',
+            'jayp0521/mason-null-ls.nvim'}}
 
     -- showing color of hex values, etc
-    use 'norcalli/nvim-colorizer.lua'
+    use {'norcalli/nvim-colorizer.lua'}
+
+    -- better language highlighting by improved parsing
+    use {'nvim-treesitter/nvim-treesitter'}
+
+    -- automatically close html-tags
+    use {'windwp/nvim-ts-autotag',
+        requires = {'nvim-treesitter/nvim-treesitter'}}
 
     -- colorful brackets
-    use 'luochen1990/rainbow'
+    use {'luochen1990/rainbow'}
 
     -- show tags
     use {'majutsushi/tagbar',
         cmd = 'TagbarToggle'}
 
     -- git wrapper
-    use 'tpope/vim-fugitive'
+    use {'tpope/vim-fugitive'}
 
     -- indicate git diff status of line
-    use 'airblade/vim-gitgutter'
+    use {'airblade/vim-gitgutter'}
 
     -- golang language support
     use {'fatih/vim-go',
@@ -81,12 +91,17 @@ return require("packer").startup(function(use)
         requires = {'godlygeek/tabular'}}
 
     -- bulk renamer
-    use 'qpkorr/vim-renamer'
+    use {'qpkorr/vim-renamer'}
 
     -- additional quote/parantheses funtions
-    use 'tpope/vim-surround'
+    use {'tpope/vim-surround'}
 
     -- colorscheme
-    use 'tiyn/vim-tccs'
+    use {'tiyn/vim-tccs'}
+
+    -- package manager sync (last entry)
+    if packer_bootstrap then
+        require('packer').sync()
+    end
 
 end)

.config/nvim/plugin/nvim-autopairs.lua

@@ -0,0 +1 @@
+require("nvim-autopairs").setup {}

.config/nvim/plugin/nvim-cmp.lua

@@ -1,4 +1,26 @@
 -- hrsh7th/nvim-cmp
+
+-- mason package manager
+require("mason").setup()
+require("mason-lspconfig").setup({
+    -- automatically install language servers setup below for lspconfig
+    automatic_setup = true,
+})
+
+-- jose-elias-alvarez/null-ls.nvim
+local null_ls = require("null-ls")
+
+null_ls.setup({
+    sources = {
+        null_ls.builtins.formatting.autopep8,
+        null_ls.builtins.formatting.nimpretty,
+    },
+})
+
+require("mason-null-ls").setup({
+    automatic_installation = true
+})
+
 -- Add additional capabilities supported by nvim-cmp
 capabilities = require("cmp_nvim_lsp").default_capabilities()
 
@@ -94,7 +116,7 @@ local nvim_lsp = require('lspconfig')
 
 -- Use a loop to conveniently call 'setup' on multiple servers and
 -- map buffer local keybindings when the language server attaches
-local servers = { "pyright", "bashls", "tsserver", "texlab", "ccls", "gopls", "hls", "nimls", "marksman" }
+local servers = { "pyright", "bashls", "texlab", "ccls", "nimls", "marksman" }
 for _, lsp in ipairs(servers) do
     nvim_lsp[lsp].setup {
         on_attach=on_attach,

.config/nvim/plugin/nvim-treesitter.lua

@@ -0,0 +1,19 @@
+-- nvim-treesitter/nvim-treesitter
+
+local ts_config = require "nvim-treesitter.configs"
+
+ts_config.setup {
+  ensure_installed = {
+    "bash",
+    "c",
+    "cpp",
+    "css",
+    "html",
+    "java",
+    "markdown",
+    "latex",
+    "python",
+  },
+
+  autotag = { enable = true },
+}