gist.sh

# install gist by `brew install gist`
#
# create gist on first time
# update gist when .gistid exists 

function gist() {
  local gistid
  args=$@
  if [ -f .gistid ]; then
    gistid=$(cat .gistid)
  fi
  if [[ "$args" != *"-u"* ]] && [ "$gistid" != "" ]; then
    args=($args -u $gistid)
  fi
  /usr/local/bin/gist -c $args > .gistid
}