Add extra packages

Add completion packages, re-add vim-slime
Add command to README to install/clean plugins

README.md

@@ -18,6 +18,7 @@ ln -s $HOME/.vim/init.vim $HOME/.config/nvim/init.vim
 ### Installing `vim-plug` plugin manager
 ```bash
 sh -c 'curl -fLo "${XDG_DATA_HOME:-$HOME/.local/share}"/nvim/site/autoload/plug.vim --create-dirs https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim'
+vim -c PlugInstall -c PlugClean -c qa! # To install plugins for nvim defined in init.vim
 ```
 Plugin definitions are in `init.vim`, inside `vim` run `:PlugInstall` to install plugins
 

init.vim

@@ -28,8 +28,15 @@ Plug 'tpope/vim-commentary'
 Plug 'airblade/vim-gitgutter'
 Plug 'vim-airline/vim-airline'
 Plug 'vim-airline/vim-airline-themes'
-" Plug 'itchyny/lightline.vim'
 Plug 'christoomey/vim-tmux-navigator'
+Plug 'jpalardy/vim-slime'
+Plug 'hrsh7th/cmp-nvim-lsp'
+Plug 'hrsh7th/cmp-buffer'
+Plug 'hrsh7th/cmp-path'
+Plug 'hrsh7th/cmp-cmdline'
+Plug 'hrsh7th/nvim-cmp'
+Plug 'hrsh7th/cmp-vsnip'
+Plug 'hrsh7th/vim-vsnip'
 
 " Initialize plugin system
 call plug#end()
@@ -102,14 +109,14 @@ set splitright
 
 let g:netrw_list_hide= '\(^\|\s\s\)\zs\.\S\+'
 
+let g:slime_target = "tmux"
+let g:slime_default_config = {"socket_name": get(split($TMUX, ","), 0), "target_pane": "{last}"}
+
 " function! GitStatus()
 "   let [a,m,r] = GitGutterGetHunkSummary()
 "   return printf('%s +%d ~%d -%d', FugitiveHead(), a, m, r)
 " endfunction
 "
-" let g:slime_target = "tmux"
-" let g:slime_default_config = {"socket_name": get(split($TMUX, ","), 0), "target_pane": "{last}"}
-"
 " let g:lightline = { 'colorscheme': 'onehalfdark' }
 " let g:lightline.component_expand = {
 "                         \ 'linter_checking': 'lightline#ale#checking',

lsp_config.lua

@@ -36,6 +36,72 @@ local lsp_flags = {
   -- This is the default in Nvim 0.7+
   debounce_text_changes = 150,
 }
+
+  -- Setup nvim-cmp.
+local cmp = require'cmp'
+
+cmp.setup({
+  snippet = {
+    -- REQUIRED - you must specify a snippet engine
+    expand = function(args)
+      vim.fn["vsnip#anonymous"](args.body) -- For `vsnip` users.
+      -- require('luasnip').lsp_expand(args.body) -- For `luasnip` users.
+      -- require('snippy').expand_snippet(args.body) -- For `snippy` users.
+      -- vim.fn["UltiSnips#Anon"](args.body) -- For `ultisnips` users.
+    end,
+  },
+  window = {
+    -- completion = cmp.config.window.bordered(),
+    -- documentation = cmp.config.window.bordered(),
+  },
+  mapping = cmp.mapping.preset.insert({
+    ['<C-b>'] = cmp.mapping.scroll_docs(-4),
+    ['<C-f>'] = cmp.mapping.scroll_docs(4),
+    ['<C-Space>'] = cmp.mapping.complete(),
+    ['<C-e>'] = cmp.mapping.abort(),
+    ['<CR>'] = cmp.mapping.confirm({ select = true }), -- Accept currently selected item. Set `select` to `false` to only confirm explicitly selected items.
+  }),
+  sources = cmp.config.sources({
+    { name = 'nvim_lsp' },
+    { name = 'vsnip' }, -- For vsnip users.
+    -- { name = 'luasnip' }, -- For luasnip users.
+    -- { name = 'ultisnips' }, -- For ultisnips users.
+    -- { name = 'snippy' }, -- For snippy users.
+  }, {
+    { name = 'buffer' },
+  })
+})
+
+-- Set configuration for specific filetype.
+cmp.setup.filetype('gitcommit', {
+  sources = cmp.config.sources({
+    { name = 'cmp_git' }, -- You can specify the `cmp_git` source if you were installed it.
+  }, {
+    { name = 'buffer' },
+  })
+})
+
+-- Use buffer source for `/` (if you enabled `native_menu`, this won't work anymore).
+cmp.setup.cmdline('/', {
+  mapping = cmp.mapping.preset.cmdline(),
+  sources = {
+    { name = 'buffer' }
+  }
+})
+
+-- Use cmdline & path source for ':' (if you enabled `native_menu`, this won't work anymore).
+cmp.setup.cmdline(':', {
+  mapping = cmp.mapping.preset.cmdline(),
+  sources = cmp.config.sources({
+    { name = 'path' }
+  }, {
+    { name = 'cmdline' }
+  })
+})
+
+-- Setup lspconfig.
+local capabilities = require('cmp_nvim_lsp').update_capabilities(vim.lsp.protocol.make_client_capabilities())
+
 require('lspconfig')['pylsp'].setup{
     cmd = {os.getenv( "HOME" ).."/.pyenv/versions/neovim3/bin/pylsp"},
     on_attach = on_attach,
@@ -47,12 +113,14 @@ require('lspconfig')['pylsp'].setup{
                 flake8 = {maxLineLength = 88}
             }
         }
-    }
+    },
+    capabilities = capabilities
 }
 require('lspconfig')['fortls'].setup{
     cmd = {os.getenv( "HOME" ).."/.pyenv/versions/neovim3/bin/fortls"},
     on_attach = on_attach,
     flags = lsp_flags,
+    capabilities = capabilities
 }
 
 require'nvim-treesitter.configs'.setup {