Hardened Python3 script to automatically rename classpaths for the AndroidX migration...thanks to AndiMiko for the original: https://gist.github.com/AndiMiko/58ecc04a64ac4f89eb5262176ab3fc9e

migrateAndroidX.py

#!/usr/local/bin/python3

import sys, getopt
import glob
import csv
import os

dictCSV = "androidx-class-mapping.csv"
projectPath = os.getcwd()

def main(argv):
    testrun = False

    try:
        opts, args = getopt.getopt(argv,"htm:p:",["mappingFile=","projectPath=","testrun"])
    except getopt.GetoptError:
        print_help()
        sys.exit(2)

    for opt, arg in opts:
        if opt == '-h':
            print_help()
            sys.exit()
        elif opt in ("-m", "--mappingFile"):
            global dictCSV
            dictCSV = arg
        elif opt in ("-p", "--projectPath"):
            global projectPath
            projectPath = arg
        elif opt in ("-t", "--testrun"):
            print("Test Run")
            testrun = True

    if (not os.path.isfile(dictCSV)):
        print(dictCSV + " doesn't exist")
        sys.exit(-1)

    if (not os.path.isdir(projectPath)):
        print(projectPath + " doesn't exist")
        sys.exit(-1)

    doReplace(testrun)

def print_help():
    print('migrateAndroidX.py -m <mappingFile> -p <projectPath> [-testrun]')

def find_unfixed(text, dic):
    for i, j in dic.items():
        if (text.find(i) > -1):
            return True
    return False

def replace_all(text, dic):
    for i, j in dic.items():
        text = text.replace(i, j)
    return text

def doReplace(isTestRun):
    fileCount = 0
    with open(dictCSV, mode='r') as infile:
        reader = csv.reader(infile)
        replaceDict = {rows[0]:rows[1] for rows in reader}

    files = []
    for ext in ('/**/*.xml', '/**/*.kt', '/**/*.java'):
        files.extend(glob.iglob(projectPath + ext, recursive=True))

    for filename in files:
        try:
            if os.path.isfile(filename):
                with open(filename, 'r') as file :
                    filedata = file.read()

                needsReplacing = find_unfixed(filedata, replaceDict)
                if (needsReplacing):
                    print("Replacing in file: " + filename)
                    fileCount = fileCount + 1
                    if (not isTestRun):
                        filedata = replace_all(filedata, replaceDict)

                        with open(filename, 'w') as file:
                            file.write(filedata)
        except Exception as e:
            print("Error reading/writing file. Skipping ..." + e)
    print(str(fileCount) + " files affected")

if __name__ == "__main__":
    main(sys.argv[1:])