set IntelliJ CLion "Single instance only" mode on all named build targets

singletonize_targets.py

import sys, xml.etree.ElementTree as ET

with open('.idea/workspace.xml', 'r') as f:
	data = f.read()

tree = ET.fromstring(data)

configurations = tree.findall('.//configuration[@default="false"][@TARGET_NAME]') 

for c in configurations:
	c.attrib['singleton'] = "true"

with open('.idea/workspace.xml', 'w') as f:
	f.write(ET.tostring(tree))