https://github.com/aaron-tay/social.ui/blob/master/scripts/deploy.sh

deploy.sh

#!/bin/sh
# Scripts to manage github pages deployment using a 'distribution' directory
# Ref: http://www.damian.oquanta.info/posts/one-line-deployment-of-your-site-to-gh-pages.html
# https://gist.github.com/cobyism/4730490
#
# This script assumes '${TARGET_DEPLOYMENT_BRANCH}' branch is the target deployment branch
#  note: in the case of standard github pages, this is is 'gh-pages')
#  note: in the case of a user github pages, this is is 'master')
# This script will deploy the CURRENT branch to the target branch
set -o

TARGET_DEPLOYMENT_BRANCH='gh-pages'
DISTRIBUTION_DIRECTORY='dist'

npm run build

# Check if there are any changes which might need to be commited and prevent deployment
# http://stackoverflow.com/questions/5139290/how-to-check-if-theres-nothing-to-be-committed-in-the-current-branch
if [ "$(git status --porcelain)" ];
then
  git status
  echo "###"
  echo "### DEPLOYMENT FAILED. Git state not clean. Fix and try again"
  echo "###"
  exit 1;
fi

# Create the subtree
git subtree split --prefix ${DISTRIBUTION_DIRECTORY} -b ${TARGET_DEPLOYMENT_BRANCH}

# Becuase this is a 'force push' the branch must not be 'protected'
git push -f origin ${TARGET_DEPLOYMENT_BRANCH}:${TARGET_DEPLOYMENT_BRANCH}

# Remove the branch locally as its not needed.
# Deployment is simplified by re-creating the force pushing the branch
git branch -D ${TARGET_DEPLOYMENT_BRANCH}