Install the gruvbox colorscheme and use it in Neovim and GVim

gruvbox is updated more often than Inkpot and works better in modern Vim - however, the 'termguicolors' option doesn't quite work correctly in Vim and won't give you a transparent terminal background, so we still use Inkpot in that case.

In Neovim, 'termguicolors' works perfectly - and in GVim it's moot since you're not using a terminal anyway. ;)

config/vim/init.vim

@@ -18,13 +18,25 @@ if !isdirectory($XDG_CACHE_HOME . '/vim/pack')
   PackUpdate
 endif
 
-" Use Inkpot, since it's gorgeous, but with a transparent background instead
-" of a solid black one.
 augroup transparent_term
   autocmd!
-  autocmd ColorScheme * highlight Normal ctermbg=NONE
+  autocmd ColorScheme * highlight Normal ctermbg=NONE guibg=NONE
 augroup END
-silent! colorscheme inkpot
+set background=dark
+let g:gruvbox_italic=1
+let g:gruvbox_improved_strings=1
+let g:gruvbox_improved_warnings=1
+
+" The 'termguicolors' option is a little broken in Vim and can't have
+" transparent background colours. It works totally fine in Neovim though.
+if has('gui_running') || has('nvim')
+  set termguicolors
+  packadd gruvbox
+  let g:airline_theme = 'gruvbox'
+  colorscheme gruvbox
+else
+  colorscheme inkpot
+endif
 
 inoremap jj <Esc>
 nnoremap <C-t> :Files<CR>

config/vim/plugins.vim

@@ -14,6 +14,8 @@ call minpac#add('k-takata/minpac', {'type': 'opt'})
 call minpac#add('tpope/vim-sensible')
 
 call minpac#add('ciaranm/inkpot', {'type': 'opt', 'do': 'colorscheme inkpot'})
+call minpac#add('morhetz/gruvbox', {'type': 'opt'})
+
 call minpac#add('editorconfig/editorconfig-vim')
 call minpac#add('jamessan/vim-gnupg')
 call minpac#add('junegunn/fzf')