autocd for git

autocd-git.sh

function err_handle()
{
  status=$?
  lastcmd=$(history | tail -1 | sed 's/^ *[0-9]* *//')
  # Perform autocd
  if [ -d "$lastcmd" ]
  then
    # Comment the following line out if autocd is enabled
    cd $lastcmd
    return
  fi
  # If the command is not a directory, it may be a branch name
  ref_exists=$(git show-ref "refs/heads/$lastcmd")
  if [[ "$ref_exists" ]]
  then
    git checkout "$lastcmd"
    return
  fi
  # If the command is neither directory nor branch - try execute it as git command
  if [[ "$lastcmd" =~ ^(add|commit|checkout|pull|push) ]]
  then
    git $lastcmd
    return
  fi
}
trap err_handle ERR