git_hub() {
    BRANCH=`git rev-parse --symbolic-full-name --abbrev-ref @{u} 2>/dev/null`
    if [[ $? != 0 ]]; then
      echo "Not currently in a git repository"    
      return
    fi
    if [[ -z $BRANCH ]]; then
      echo "Can't determine current git branch name"
      return   
    fi
    IFS_STORE="$IFS"
    IFS=$'\n'
    for REMOTE in `git remote`; do
        if [[ $BRANCH == "$REMOTE/"* ]]; then
          SHORT_BRANCH=${BRANCH#$REMOTE/}
          GITHUB_REPO=`git remote show "$REMOTE" | grep 'Fetch URL' | awk -F: '{ print $3 }' | sed -e 's,.git$,,'`
          if [[ $? != 0 ]]; then
            echo "Error loading github project info"
            break
          fi
          if [[ -z $BRANCH ]]; then
            echo "Couldn't determine github project info"
            break
          fi
          if [[ $SHORT_BRANCH == 'master' ]]; then
            # todo `git br -a | grep HEAD | ....`
            URL="https://github.com/$GITHUB_REPO/"
          else
            URL="https://github.com/$GITHUB_REPO/tree/$SHORT_BRANCH"
          fi
          echo "$URL"
          if [[ `uname` == 'Darwin' ]]; then
            open "$URL"
          elif `which xdg-open >/dev/null`; then
            xdg-open "$URL"
          else
            echo "Couldn't find URL opener"
          fi
          break
        fi 
    done
    IFS="$IFS_STORE"
  }