A pre-push hook to automatically publish to github pages every time you push.

pre-push

#!/bin/bash
# drop this in .git/hooks/, and chmod +x .git/hooks/pre-push

# store current branch
cur_branch=$(git rev-parse --abbrev-ref HEAD)
if [[ $cur_branch == "gh-pages" ]]
then
    # bail out if we're trying to push the gh-pages branch (to prevent infinite loop)
    exit 0
else
    # merge current branch into gh-pages
    git checkout gh-pages
    git merge -m 'automatic pre-push merge' $cur_branch
    # push gh-pages
    git push origin gh-pages
    # switch back and exit
    git checkout $cur_branch
fi
exit 0