hub_open.sh

#!/bin/bash

# assuming `origin (push)` is a github url,
# this opens the current branch on github's site,
# ready for a pull request
# only works on macs right now (it uses `open`)

function parse_git_branch {
  git branch --no-color 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/(\1)/' -e 's/)//' -e 's/(//'
}

function open_branch {
  open "https://`repo_root`/tree/`parse_git_branch`"
}

function repo_root {
  git remote -v | grep "origin.*push" | cut -f 2 -d '@' | cut -f 1 -d ' ' | sed -e 's/\.git//' -e 's/:/\//'
}

open_branch

Nice.

Could do something like this to work on linux too
OPEN=which xdg-open || which open
and call $OPEN instead of open. (or just simply replace open with xdg-open)