replace luasnip with vsnip

basic/nvim/plugconf/cmp.lua

@@ -1,13 +1,18 @@
 local cmp = require 'cmp'
 local context = require 'cmp.config.context'
-local luasnip = require 'luasnip'
 
 vim.o.completeopt = nil
 
+-- Plugin helper
+local feedkey = function(key, mode)
+  key = vim.api.nvim_replace_termcodes(key, true, true, true)
+  vim.api.nvim_feedkeys(key, mode, true)
+end
+
 -- General setup
 cmp.setup {
   snippet = {
-    expand = function(args) luasnip.lsp_expand(args.body) end,
+    expand = function(args) vim.fn['vsnip#anonymous'](args.body) end,
   },
   window = {
     documentation = { border = 'rounded' },
@@ -17,7 +22,7 @@ cmp.setup {
     format = function(entry, item)
       item.menu = ({
         nvim_lsp = 'λ',
-        luasnip = '⋗',
+        vsnip = '⋗',
         buffer = 'Ω',
         path = '🖫',
       })[entry.source.name]
@@ -30,10 +35,10 @@ cmp.setup {
     ['<tab>'] = cmp.mapping(function(fallback)
       if cmp.get_selected_entry() then
         cmp.confirm()
-      elseif luasnip.jumpable(1) then
-        luasnip.jump(1)
-      elseif luasnip.expandable() then
-        luasnip.expand()
+      elseif vim.fn['vsnip#jumpable'](1) == 1 then
+        feedkey('<plug>(vsnip-jump-next)', '')
+      elseif vim.fn['vsnip#expandable']() == 1 then
+        feedkey('<plug>(vsnip-expand)', '')
       elseif cmp.visible() then
         cmp.select_next_item()
       else
@@ -42,8 +47,8 @@ cmp.setup {
     end, { 'i', 's' }),
     -- Jump back with shift tab
     ['<s-tab>'] = cmp.mapping(function(fallback)
-      if luasnip.jumpable(-1) then
-        luasnip.jump(-1)
+      if vim.fn['vsnip#jumpable'](-1) == 1 then
+        feedkey('<plug>(vsnip-jump-prev)', '')
       else
         fallback()
       end
@@ -57,12 +62,16 @@ cmp.setup {
       end
     end),
     ['<c-p>'] = cmp.mapping(function(fallback)
-      if cmp.visible() then cmp.select_prev_item() else fallback() end
+      if cmp.visible() then
+        cmp.select_prev_item()
+      else
+        fallback()
+      end
     end),
   },
   sources = cmp.config.sources({
     { name = 'nvim_lsp' },
-    { name = 'luasnip' },
+    { name = 'vsnip' },
     { name = 'nvim_lua' },
   }, {
     { name = 'buffer', keyword_length = 5 },