fix_ts.py

import xml.etree.ElementTree as ET
import sys
import os

file = sys.argv[1]
tree = ET.parse(file, parser=ET.XMLParser(encoding="utf-8"))
root = tree.getroot()

# pylupdate6 doesn't set locale on creation, make sure it's there
locale = os.path.splitext(os.path.basename(file))[0]
root.set("language", locale)

# Removing line info so updating tr.py affects git history much less
for location in root.findall(".//location"):
    location.set("line", "0")

modified_xml = ET.tostring(root, encoding="utf-8", xml_declaration=False).decode()
with open(file, "r", encoding="utf-8") as f:
    original_xml = f.read()

# These declarations are hardcoded in pylupdate6, make sure everything is correct
declarations = original_xml.split("\n", 2)[:2]
assert declarations[0] == '<?xml version="1.0" encoding="utf-8"?>', "xml format has changed"
assert declarations[1] == "<!DOCTYPE TS>", "doctype format has changed"
final_xml = "\n".join(declarations) + "\n" + modified_xml + "\n"

with open(file, "w", encoding="utf-8") as f:
    f.write(final_xml)