doc = buildDesignSpace(sources, instances, axes)
#add rule for dollar. Needs to be after doc = buildDesignSpace() because this doc is a DesignSpaceDocument(), rather than the doc above which is a DesignSpaceDocumentReader() object
# r1 = RuleDescriptor()
# r1.name = "heavy-bars-wght"
# r1.conditions.append(dict(name="wght", minimum=800, maximum=850))
# r1.subs.append(("dollar", "dollar.rvrn2"))
# doc.addRule(r1)
r2 = RuleDescriptor()
r2.name = "heavier-bars-wght"
r2.conditions.append(dict(name="wght", minimum=800, maximum=900))
r2.subs.append(("dollar", "dollar.rvrn"))
doc.addRule(r2)
doc.write(designSpace)
default = "Amstelvar-Italic.ufo"
# load the default font
default_path = os.path.join(src_dir, default)
dflt = Font(default_path)
sources = [source.name for source in doc.sources]
# take the default out of the source list
sources.remove(default)
print("Building masters...")
# load font objects