netrw_toggle.vim

let DirProjectHome = getcwd()

function! ExploreToggle(bang)
  if &ft ==# "netrw"
    :exe "lcd " . g:DirProjectHome
    :bd
  else
    if a:bang
      :lcd %:p:h
      :enew
      :Explore
    else
      :exe "lcd " . g:DirProjectHome
      :enew
      :Explore
    endif
  endif
endfunction
command! -bang ET call ExploreToggle(<bang>0)

" --- Commands ---
" :ET toggles file explorer from project home
" :ET! toggles file explorer from current open file's directory
" --- Suggested Mappings ---
" map ` :ET<CR>
" map ~ :ET!<CR>