nvimrc: switch to nvim-cmp plugin

nvimrc

@@ -68,7 +68,7 @@ set updatetime=250
 set pastetoggle=<f2>
 set pumheight=200
 " Required for nvim-compe:
-set completeopt=menuone,noselect
+set completeopt=menu,menuone,noselect
 set complete-=i
 set nrformats-=octal
 set ttimeout
@@ -768,80 +768,30 @@ nvim_lsp.sumneko_lua.setup {
 }
 EOF
 
-" nvim-compe:
+" nvim-cmp:
 
-packadd! nvim-compe " https://github.com/hrsh7th/nvim-compe
-packadd! compe-tmux " https://github.com/andersevenrud/compe-tmux
+packadd! nvim-cmp " https://github.com/hrsh7th/nvim-cmp.git
+packadd! cmp-nvim-lsp " https://github.com/hrsh7th/cmp-nvim-lsp.git
+packadd! cmp-buffer " https://github.com/hrsh7th/cmp-buffer.git
+packadd! cmp-path " https://github.com/hrsh7th/cmp-path.git
+packadd! cmp-calc " https://github.com/hrsh7th/cmp-calc
 
 lua <<EOF
-require 'compe'.setup {
-  enabled = true;
-  autocomplete = true;
-  debug = false;
-  min_length = 1;
-  preselect = 'enable';
-  throttle_time = 80;
-  source_timeout = 200;
-  resolve_timeout = 800;
-  incomplete_delay = 400;
-  max_abbr_width = 100;
-  max_kind_width = 100;
-  max_menu_width = 100;
-  documentation = true;
+  local cmp = require('cmp')
 
-  source = {
-    path = true;
-    buffer = true;
-    calc = true;
-    nvim_lsp = true;
-    nvim_lua = true;
-    vsnip = false;
-    ultisnips = false;
-    tmux = true;
-    treesitter = false;
-  };
-}
-EOF
-
-inoremap <silent><expr> <C-y> compe#confirm('<C-y>')
-inoremap <silent><expr> <C-e> compe#close('<C-e>')
-inoremap <silent><expr> <C-f> compe#scroll({ 'delta': +4 })
-inoremap <silent><expr> <C-d> compe#scroll({ 'delta': -4 })
-
-" TAB navigation support:
-lua <<EOF
-local t = function(str)
-  return vim.api.nvim_replace_termcodes(str, true, true, true)
-end
-
-local check_back_space = function()
-    local col = vim.fn.col('.') - 1
-    if col == 0 or vim.fn.getline('.'):sub(col, col):match('%s') then
-        return true
-    else
-        return false
-    end
-end
-
-_G.tab_complete = function()
-  if vim.fn.pumvisible() == 1 then
-    return t "<C-n>"
-  elseif check_back_space() then
-    return t "<Tab>"
-  else
-    return vim.fn['compe#complete']()
-  end
-end
-_G.s_tab_complete = function()
-  if vim.fn.pumvisible() == 1 then
-    return t "<C-p>"
-  else
-    return t "<S-Tab>"
-  end
-end
-
-vim.api.nvim_set_keymap("i", "<Tab>", "v:lua.tab_complete()", {expr = true})
-vim.api.nvim_set_keymap("s", "<Tab>", "v:lua.tab_complete()", {expr = true})
-vim.api.nvim_set_keymap("i", "<S-Tab>", "v:lua.s_tab_complete()", {expr = true})
-vim.api.nvim_set_keymap("s", "<S-Tab>", "v:lua.s_tab_complete()", {expr = true})
+  cmp.setup({
+    mapping = {
+      ['<C-u>'] = cmp.mapping.scroll_docs(-4),
+      ['<C-d>'] = cmp.mapping.scroll_docs(4),
+      ['<C-Space>'] = cmp.mapping.complete(),
+      ['<C-e>'] = cmp.mapping.close(),
+      ['<CR>'] = cmp.mapping.confirm({ select = true }),
+    },
+    sources = cmp.config.sources({
+      { name = 'nvim_lsp' },
+      { name = 'buffer' },
+      { name = 'path' },
+      { name = 'calc' },
+    })
+  })
 EOF