A shell function that allows reusing the same screen/tmux window for editing/viewing files with vim, inspired by the following question on superuser.com: http://superuser.com/questions/563448/screen-grouping-all-vim-invokation-under-one-window/563784

v

v () {
  if [ $STY ]; then
    # screen
    local VIM_SERVER_NAME="VIM-SCREEN-$STY"

    if [ "`vim --serverlist | grep -i $VIM_SERVER_NAME`" = "" ]; then
      # No vim server, become the server
      screen -X title vim
      vim --servername $VIM_SERVER_NAME "$@"
      screen -X title `basename $SHELL`
    else
      # A vim server exists, use it, then switch to it.
      vim --servername $VIM_SERVER_NAME --remote-tab "$@"
      screen -X select vim
    fi
  elif [ $TMUX ]; then
    # tmux
    local VIM_SERVER_NAME="VIM-TMUX-`tmux list-windows -F '#{session_name}' | head -1`"

    if [ "`vim --serverlist | grep -i $VIM_SERVER_NAME`" = "" ]; then
      # No vim server, become the server
      tmux rename-window vim
      printf '\033]2;%s\033\\' vim # rename pane

      vim --servername $VIM_SERVER_NAME "$@"

      printf '\033]2;%s\033\\' `hostname` # rename pane
      tmux rename-window `basename $SHELL`
    else
      # A vim server exists, use it, then switch to it.
      vim --servername $VIM_SERVER_NAME --remote-tab "$@"
      tmux select-window -t vim

      local VIM_PANE="`tmux list-panes -F '#{pane_title}' | grep -n '^vim$' | cut -f1 -d :`"
      tmux select-pane -t $((VIM_PANE-1))
    fi
  else
    vim "$@"
  fi
}