hass-core/scripts/build_frontend

# Builds the frontend for production
# Call 'build_frontend demo' to build a demo frontend.

# If current pwd is scripts, go 1 up.
if [ ${PWD##*/} == "scripts" ]; then
    cd ..
fi

scripts/build_js $1

# To build the frontend, you need node, bower, vulcanize and html-minifier
# npm install -g bower vulcanize html-minifier

# Install dependencies
cd homeassistant/components/frontend/www_static/polymer
bower install
cd ..
cp polymer/bower_components/webcomponentsjs/webcomponents-lite.min.js .

vulcanize --inline-css --inline-scripts --strip-comments polymer/home-assistant.html > frontend.html

# html-minifier crashes on frontend, minimize kills the CSS
# html-minifier --config-file polymer/html-minifier.conf -o frontend.html frontend.html

# Generate the MD5 hash of the new frontend
cd ..
echo '""" DO NOT MODIFY. Auto-generated by build_frontend script """' > version.py
if [ $(command -v md5) ]; then
    echo 'VERSION = "'`md5 -q www_static/frontend.html`'"' >> version.py
elif [ $(command -v md5sum) ]; then
    echo 'VERSION = "'`md5sum www_static/frontend.html | cut -c-32`'"' >> version.py
else
    echo 'Could not find an MD5 utility'
fi