nvim: after/ftplugin: gitrebase: Add vim-interactive-rebase-reverse

The plugin is a pretty small ftplugin. Just add it to our ftplugin.
This also fixes the issue where this plugin did not take affect
when using interactive rebase from within fugitive.

nvim/.config/nvim/after/ftplugin/gitrebase.vim

@@ -1,3 +1,24 @@
+" Taken from https://github.com/salcode/vim-interactive-rebase-reverse
+" Reverse the order of all lines that do NOT:
+" - Begin with #
+" - nor are a blank link
+function! s:Reverse()
+  global!/\(^#\)\|\(^$\)/m0
+endfunction
+
+" Reverse the order of all commits in the git interactive rebase screen,
+" when this filetype (gitrebase) is loaded.
+call s:Reverse()
+
+" Set an autocmd to run when the Buffer is written
+augroup fe_interactive_rebase_reverse
+  autocmd!
+  " Before saving (un)reverse the order of all commits.
+  autocmd BufWritePre <buffer> call s:Reverse()
+  " After saving reverse the order of the commits again.
+  autocmd BufWritePost <buffer> call s:Reverse()
+augroup END
+
 " See https://github.com/neovim/neovim/blob/master/runtime/ftplugin/gitrebase.vim
 nmap <buffer> <silent> <Leader>p :Pick<CR>
 nmap <buffer> <silent> <Leader>s :Squash<CR>

nvim/.config/nvim/lua/plugins.lua

@@ -43,7 +43,6 @@ local init = function ()
   }
   use 'tpope/vim-fugitive'
   use 'rhysd/git-messenger.vim'
-  use 'salcode/vim-interactive-rebase-reverse'
   use 'whiteinge/diffconflicts'
   use 'sindrets/diffview.nvim'
   -- Boost vim command line mode