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 and vulcanize
# npm install -g bower vulcanize

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

# Let Polymer refer to the minified JS version before we compile
sed -i.bak 's/polymer\.js/polymer\.min\.js/' polymer/bower_components/polymer/polymer.html

vulcanize -o frontend.html --inline --strip polymer/home-assistant.html

# Revert back the change to the Polymer component
rm polymer/bower_components/polymer/polymer.html
mv polymer/bower_components/polymer/polymer.html.bak polymer/bower_components/polymer/polymer.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