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" Lets me know how much time I've spent editing a file
" Keyboard shortcut -> \dt
augroup TimeSpentEditing
au!
au BufWinEnter * if !exists('b:tstart')|let b:tstart=reltime()|en
augroup END

function! TimeSpentEditing()
  let secs = str2nr(reltimestr(reltime(b:tstart)))
  let hours = secs / 3600
  let minutes = (secs - hours * 3600) / 60
  let seconds = secs - hours * 3600 - minutes * 60
  return printf("%d:%02d:%02d", hours, minutes, seconds)
endfunction

function! s:logTimespent()
  let curFile = expand("%:p")
  let time = TimeSpentEditing()
  let path = expand("$HOME/.vimtime")
  execute ":silent !echo " . curFile . " : " . time . " >> " . path
endfunction

autocmd BufWritePost * call s:logTimespent()

com! TimeSpentEditing echo TimeSpentEditing()
map <silent> <leader>dt :TimeSpentEditing<CR>