Added ability to use Windows clipboard inside WSL

vimrc

@@ -70,6 +70,71 @@ nnoremap <C-w>j :wincmd s<cr>:wincmd k<cr>
nnoremap <C-w>k :wincmd s<cr>
nnoremap <C-w>l :wincmd v<cr>:wincmd l<cr>

" Using Windows clipboard inside WSL Ubuntu
" This emulates an additional '"' register
" I know... it's magical...
" Note: requires paste.exe on the PATH
let is_this_not_on_wsl = system("uname -r | grep -q 'Microsoft' && echo $?")
if is_this_not_on_wsl == 0
  nnoremap <silent> ""y :set opfunc=WindowsYank<CR>g@
  vnoremap <silent> ""y :<C-U>call WindowsYank(visualmode(), 1)<CR>
  nnoremap <silent> ""p :call WindowsPaste('p')<CR>
  nnoremap <silent> ""P :call WindowsPaste('P')<CR>
  nnoremap <silent> ""gp :call WindowsPaste('gp')<CR>
  nnoremap <silent> ""gP :call WindowsPaste('gP')<CR>
  nnoremap <silent> ""]p :call WindowsPaste(']p')<CR>
  nnoremap <silent> ""[p :call WindowsPaste('[p')<CR>
  nnoremap <silent> ""]P :call WindowsPaste(']P')<CR>
  nnoremap <silent> ""[P :call WindowsPaste('[P')<CR>
  vnoremap <silent> ""p :call WindowsPaste('p', 1)<CR>
  vnoremap <silent> ""P :call WindowsPaste('P', 1)<CR>
endif

function! WindowsPaste(command, ...)
  " (1) Save original value of the unnamed register to restore later on
  let reg_save = @@

  " (2) Load clipboard into register
  let @@ = system('pushd /mnt/c/ > /dev/null && paste.exe && popd > /dev/null')

  " (3) Run whatever command was being run
  if a:0
    exe "normal! gv" . a:command
    " Don't revert unnamed register if inside visual mode
  else
    exe "normal! " . a:command
    " Revert unnamed register
    let @@ = reg_save
  endif
endfunction

function! WindowsYank(type, ...)
  " (1) Save original values for the selection setting
  " and the unnamed register
  let sel_save = &selection
  let &selection = "inclusive"
  let reg_save = @@

  " (2) Yank text to unnamed register
  if a:0  " Invoked from Visual mode, use gv command.
    silent exe "normal! gvy"
  elseif a:type == 'line'
    silent exe "normal! '[V']y"
  else
    silent exe "normal! `[v`]y"
  endif

  " (3) Send contents of @@ to Windows clip.exe
  " Note: I've included a pushd-to-windows-directory to suppress warning
  " because windows warns about failing to translate working directory
  " when current working directory is inside wsl.
  echo system('pushd /mnt/c/ > /dev/null && clip.exe && popd > /dev/null', getreg('', 1, 1))

  " (4) Restore original settings and value of unnamed register
  let &selection = sel_save
  let @@ = reg_save
endfunction


"
" Backup & Persistance