Revert "remove cmp, snippy and custom snippets + remap builtin completion to c-k..."

This reverts commit d5ace26f6d.

nvim/.config/nvim/init.lua

@@ -98,8 +98,6 @@ vim.cmd [=[
     nnoremap ,rl :checktime<CR>
     nnoremap ,m :wa<CR>:make<CR>
 
-    inoremap <c-k> <c-x>
-
     nnoremap ,cD :call setqflist(filter(getqflist(), 'v:val != getqflist()[getqflist({"idx": 0}).idx - 1]'))<CR>
 
     nnoremap ,t <c-w>v<c-w>l:terminal<CR>a
@@ -853,6 +851,50 @@ require'lazy'.setup{ --{{{1
 
         end
     },
+    { 'dcampos/nvim-snippy', --{{{2
+        config = function()
+            require'snippy'.setup{ enable_auto = true, }
+            vim.cmd [[
+                imap <expr> <c-l> '<Plug>(snippy-next)'
+                imap <expr> <c-k> '<Plug>(snippy-previous)'
+                smap <expr> <c-l> '<Plug>(snippy-next)'
+                smap <expr> <c-k> '<Plug>(snippy-previous)'
+                nmap g; <Plug>(snippy-cut-text)
+                xmap g; <Plug>(snippy-cut-text)
+            ]]
+        end
+    },
+    { 'hrsh7th/nvim-cmp', --{{{2
+        dependencies = {
+            'hrsh7th/cmp-nvim-lsp',
+            'hrsh7th/cmp-path',
+            'dcampos/nvim-snippy',
+            'dcampos/cmp-snippy',
+        },
+        config = function()
+            local cmp = require'cmp'
+            cmp.setup{
+                snippet = {
+                    expand = function(args)
+                        require'snippy'.expand_snippet(args.body)
+                    end,
+                },
+                mapping = {
+                    ['<C-y>'] = cmp.mapping.confirm{ select = true },
+                    ['<C-n>'] = cmp.mapping.select_next_item(),
+                    ['<C-p>'] = cmp.mapping.select_prev_item(),
+                },
+                sources = cmp.config.sources(
+                    {
+                        { name = 'snippy',   priority = 100000000000000000000 },
+                        { name = 'nvim_lsp', priority = 1000000000},
+                        { name = 'path',     priority = 1},
+                    }
+                ),
+                preselect = cmp.PreselectMode.None,
+            }
+        end,
+    },
     { 'nvim-telescope/telescope.nvim', --{{{2
         tag = '0.1.8',
         dependencies = {