Migrate NSLocalizedString occurences in Swift code to SwiftGen

migrate_localizable_strings_to_swiftgen.py

#!/usr/bin/env python3

import os
import re
import string

def to_camel_case(snake_str):
    components = snake_str.split('_')
    return components[0] + ''.join(string.capwords(x) for x in components[1:])

def convert_case(match_obj):
    if match_obj.group(1) is not None:
        return 'L10n.' + to_camel_case(match_obj.group(1))

def migrate_localizable_strings_to_swiftgen(path):
    with open(path) as f:
        content = f.read()
        newText = re.sub(r"NSLocalizedString\(\"([^\"]+)\"(, comment: \"[^\"]*\")?\)", convert_case, content)
        newText = re.sub(r"String\(format: (L10n\.[a-zA-Z0-9]+), ([^\)]+)\)", "\g<1>(\g<2>)", newText)

    with open(path, "w") as f:
        f.write(newText)

for root, dirs, files in os.walk("."):
    for file in files:
        if file.endswith(".swift"):
            migrate_localizable_strings_to_swiftgen(os.path.join(root, file))