This is a shell script to open the current folder and branch in GitHub

OpenBranchInGithub.sh

#! /usr/bin/env zsh

if git rev-parse --git-dir > /dev/null 2>&1; then
  : # This is a valid git repository (but the current working
    # directory may not be the top level.
    # Check the output of the git rev-parse command if you care)
    REMOTE=`git remote -v`
    BRANCH=`git status`
    CURPATH=`git rev-parse --show-toplevel`
    DIR=`pwd`

    REMOTE=`git remote -v | head -n 1 | tr -d '[:space:]' | sed -e 's/origin\(.*\)(fetch)/\1/'`
    REMOTE="${REMOTE//.git/}"
    BRANCH=`git status | head -n 1 | sed -e 's/On branch\(.*\)/\1/' | tr -d '[:space:]'`
    PATHINREPO="${DIR//$CURPATH/}"

    open $REMOTE/tree/$BRANCH$PATHINREPO

else
  : # this is not a git repository
    echo "Not in a git repo"
fi