call plug#begin('~/.vim/plugged')
    Plug 'vim-airline/vim-airline'
    Plug 'vim-airline/vim-airline-themes'
    Plug 'preservim/nerdtree'
    Plug 'Xuyuanp/nerdtree-git-plugin'
    Plug 'nvim-lua/plenary.nvim'
    Plug 'nvim-telescope/telescope.nvim', { 'tag': '0.1.5' }
    Plug 'tpope/vim-surround'
    Plug 'tpope/vim-speeddating'
    Plug 'mhinz/vim-startify'
    Plug 'dstein64/vim-startuptime'
    Plug 'hiroakis/cyberspace.vim'
    Plug 'mhinz/vim-startify'
    Plug 'dstein64/vim-startuptime'
    Plug 'SirVer/ultisnips'
call plug#end()

function Update_sys()
    PlugUpdate
endfunction
nmap <C-u> :call Update_sys()<CR>

" NERDTree config
let g:NERDTreeShowHidden = 1
let g:NERDTreeDirArrowExpandable = "▸"
let g:NERDTreeDirArrowCollapsible = "▾"
nmap <C-e> :NERDTreeToggle<CR>

" UltiSnips config
let g:UltiSnipsExpandTrigger = "<tab>"
let g:UltiSnipsJumpForwardTrigger = "<c-l>"
let g:UltiSnipsJumpBackwardTrigger = "<c-h>"
let g:UltiSnipsEditSplit = "vertical"
let g:UltiSnipsSnippetDirectories = [ "~/.config/nvim/UltiSnips" ]