Change vim from youcomplete-me to coc

installpackages.txt

@@ -37,3 +37,5 @@ xss-lock
 bc
 gvfs
 gvfs-afc
+nodejs
+npm

vimrc

@@ -1,7 +1,8 @@
 filetype plugin on
-
 filetype indent on
 
+set encoding=utf-8
+
 command! W execute 'w !sudo tee % > /dev/null' <bar> edit!
 
 nnoremap <buffer> <Leader>mm <cmd>make<CR>
@@ -12,6 +13,8 @@ set foldlevelstart=0
 
 set showcmd
 
+color torte
+
 set ignorecase
 set smartcase
 set hlsearch
@@ -28,14 +31,18 @@ set autoindent
 set smartindent
 set tags=./tags,tags;$HOME
 
+inoremap <silent><expr> <TAB>
+      \ coc#pum#visible() ? coc#pum#next(1) :
+      \ CheckBackspace() ? "\<Tab>" :
+      \ coc#refresh()
+inoremap <expr><S-TAB> coc#pum#visible() ? coc#pum#prev(1) : "\<C-h>"
+
 
 packadd! termdebug
 
 highlight ColorColumn ctermbg=magenta
 call matchadd('ColorColumn', '\%81v', 100)
 
-let g:ycm_always_populate_location_list = 1
-
 let data_dir = has('nvim') ? stdpath('data') . '/site' : '~/.vim'
 if empty(glob(data_dir . '/autoload/plug.vim'))
   silent execute '!curl -fLo '.data_dir.'/autoload/plug.vim --create-dirs  https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim'
@@ -45,7 +52,7 @@ endif
 call plug#begin()
 
 Plug 'stevearc/vim-arduino'
-Plug 'ycm-core/YouCompleteMe'
+Plug 'neoclide/coc.nvim', {'branch': 'release'}
 Plug 'ludovicchabant/vim-gutentags'
 Plug 'tpope/vim-unimpaired'