python script for merging themes.xml and colors.xml

convert.py

from xml.etree.ElementTree import parse, indent
import re
import sys
colors = parse("material-theme/values/colors.xml")
day = parse("material-theme/values/themes.xml")
night = parse("material-theme/values-night/themes.xml")

def get_color(tree, colorString):
        colorName = re.compile("@color/(.+)").match(colorString).group(1)
        for color in tree.getroot().findall("color"):
                if color.get("name") == colorName:
                        return color.text

def apply_patch(theme, colors):
        style = theme.getroot().find("style")
        style.set("name", sys.argv[1])
        del style.attrib["parent"]
        for item in style:
                item.text = get_color(colors, item.text)

apply_patch(day, colors)
apply_patch(night, colors)

indent(day)
day.write("day.xml")
indent(night)
night.write("night.xml")

python3 convert.py <patch name>, with material-theme in the current directory
generates day.xml and night.xml into current directory