git rev-parse --is-inside-work-tree 2>/dev/null

if [[ $? != 0 ]]

echo "Not a git repository."

exit 1

remote="origin"

if [ ! -z "$1" ]

remote="$1"

remote_url="remote.${remote}.url"

giturl=$(git config --get $remote_url)

if [ -z "$giturl" ]

echo "$remote_url not set."

exit 1

giturl=${giturl/git\@github\.com\:/https://github.com/}

giturl=${giturl%\.git}

if [ -z "$2" ]

branch=`git symbolic-ref -q HEAD | sed -e 's|^refs/heads/||'`

branch="$2"

if [ ! -z "$branch" ]

giturl="${giturl}/tree/${branch}"

giturl=${giturl/tree\/master/}

if [ $(uname -s) == "Darwin" ]

open=open

open=xdg-open

$open $giturl

exit 0