A millionth version of my vimrc

init.vim

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"                                    CORE
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set autoindent   " enable automatic indentation
set expandtab
set hlsearch     " highlight search results
set ignorecase   " case insensitive search
set incsearch    " match the search and return to the initial position
set list         " Show `listchars` characters
set nofoldenable
set number       " show line numbers
set showcmd      " show command in bottom bar
set showmatch    " highlight matching [{()}]
set smartcase    " use case sensitive search if a capital letter is used
set warn         " show current mode
set wildmenu     " visual autocomplete for command menu
set hidden
set secure
set nowrap
set noshowmode

" Editing
set expandtab
set tabstop=4
set softtabstop=4
set shiftwidth=4
set colorcolumn=80
set tw=79
set autoindent
set smartindent

" Easy window navigation
map <C-h> <C-w>h
map <C-j> <C-w>j
map <C-k> <C-w>k
map <C-l> <C-w>l

" Clear highlighed search
nmap <silent> ,/ :nohlsearch<CR>
nmap <Leader>h :bnext<CR>
nmap <Leader>l :bprevious<CR>

" Wrap toggle
:nnoremap <F3> :set wrap!<CR>

" Reload current file
:nnoremap <F5> :source %<CR>

" Save as sudo
cmap w!! w !sudo tee % >/dev/null

" Indent/unindent with tab/shift-tab
map <Tab> >>
imap <S-Tab> <Esc><<i
nmap <S-tab> <<

filetype on
filetype plugin indent on

" Jump to the previous location when opening a file
if has("autocmd")
  au BufReadPost * if line("'\"") > 1 && line("'\"") <= line("$") | exe "normal! g'\"" | endif
endif

" Strip whitespace on write
fun! StripTrailingWhitespace()
  if &ft =~ 'vim\|vimrc'
    return
  endif
  %s/\s\+$//e
endfun
autocmd BufWritePre * call StripTrailingWhitespace()

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"                                  PLUGINS
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runtime autoload/plug.vim
if !exists("*plug#begin")
    echo "[ERR] Plug is not installed."
else
    call plug#begin()
    Plug 'arcticicestudio/nord-vim'
    Plug 'scrooloose/nerdcommenter'
    Plug 'scrooloose/nerdtree'
    "Plug 'junegunn/fzf', { 'dir': '~/.fzf', 'do': './install --all' }
    if !executable("fzf")
        echo "[ERR] fzf is not installed"
    else
        Plug 'junegunn/fzf.vim'
    endif
    if !executable("node")
        echo "[ERR] node is not installed"
    else
        Plug 'neoclide/coc.nvim', {'branch': 'release'}
    endif
    Plug 'vim-airline/vim-airline'
    Plug 'tpope/vim-surround'
    Plug 'w0rp/ale'
    "Plug 'ryanoasis/vim-devicons'
    "Plug 'vim-airline/vim-airline'
    "Plug 'vim-airline/vim-airline-themes'
    "Plug 'maxbrunsfeld/vim-yankstack'
    "Plug 'sheerun/vim-polyglot'
    "Plug 'honza/vim-snippets'
    "Plug 'galooshi/vim-import-js'
    "Plug 'godlygeek/tabular'
    "Plug 'neovimhaskell/haskell-vim'
    "Plug 'parsonsmatt/intero-neovim'
    "Plug 'neomake/neomake'
    "Plug 'ndmitchell/ghcid', { 'rtp': 'plugins/nvim' }
    call plug#end()
endif

if !has_key(plugs, "nord-vim")
    echo "[ERR] nord-vim not found"
else
    colorscheme nord
    let g:nord_italic_comments=1
endif

if !has_key(plugs, "nerdtree")
    echo "[ERR] nerdtree not found"
else
    nmap <leader>f :NERDTreeToggle<CR>
    nmap <leader>F :NERDTreeFind<CR>
    let NERDTreeMinimalUI=1
endif

if !has_key(plugs, "fzf.vim")
    echo "[ERR] fzf.vim not found"
else
    nnoremap <silent> <C-t> :FZF -m<cr>
    nnoremap <silent> <C-p> :Files<cr>
    nnoremap <silent> <C-f> :Rg<cr>
endif

if !has_key(plugs, "coc.nvim")
    echo "[ERR] coc.nvim not found"
else
    nmap <silent> gd <Plug>(coc-definition)
    nmap <silent> gy <Plug>(coc-type-definition)
    nmap <silent> gi <Plug>(coc-implementation)
    nmap <silent> gr <Plug>(coc-references)

    function! CheckBackspace() abort
        let col = col('.') - 1
        return !col || getline('.')[col - 1]  =~# '\s'
    endfunction
    inoremap <silent><expr> <TAB>
                \ pumvisible() ? "\<C-n>" :
                \ CheckBackspace() ? "\<TAB>" :
                \ coc#refresh()
    inoremap <expr><S-TAB> pumvisible() ? "\<C-p>" : "\<C-h>"
    " Use <c-space> to trigger completion.
    inoremap <silent><expr> <c-space> coc#refresh()
    " Make <CR> auto-select the first completion item and notify coc.nvim to
    " format on enter, <cr> could be remapped by other vim plugin
    inoremap <silent><expr> <cr> pumvisible() ? coc#_select_confirm()
                \: "\<C-g>u\<CR>\<c-r>=coc#on_enter()\<CR>"

    " Shift+k to show documentation
    nnoremap <silent> K :call <SID>show_documentation()<CR>
    function! s:show_documentation()
        if (index(['vim','help'], &filetype) >= 0)
            execute 'h '.expand('<cword>')
        else
            call CocAction('doHover')
        endif
    endfunction

    " Leader + rn to rename
    nmap <leader>rn <Plug>(coc-rename)

    " Leader + ac for a code action
    nmap <leader>ac <Plug>(coc-codeaction)
endif


if !has_key(plugs, "vim-airline")
    echo "[ERR] vim-airline not found"
else
    let g:airline#extensions#tabline#enabled = 1
endif