Get diff between two folders and stores diff files in separate directory

get_diffy.py

import os
import sys
import difflib
from shutil import copyfile
import pathlib

if len(sys.argv) < 3:
    print('[ERR]: Not enough arguments passed. Usage: get_diff.py <firstFolder> <secondFolder>')
    sys.exit()

# Accept root folders arguments
firstFolderRoot = sys.argv[1]
secondFolderRoot = sys.argv[2]
fileName = 'output.txt'
fileDescriptor = open(fileName, 'w+')
destDir = 'output'
# All dirs in first folder
firstFolderDirs = [x[0] for x in os.walk(firstFolderRoot)]

# Loop through each directory in first folder
for firstFolderDir in firstFolderDirs:

    # Loop through all files in the directory
    for filename in os.listdir(firstFolderDir):
        if filename.endswith(".php") or filename.endswith(".xml") or filename.endswith(".html") or filename.endswith(
                ".js") or filename.endswith("phtml"):
            firstFolderFilePath = os.path.join(firstFolderDir, filename)
            secondFolderFilePath = os.path.join(firstFolderDir.replace(firstFolderRoot, secondFolderRoot), filename)

            # Check if file exists in secondFolderRoot
            if not os.path.isfile(secondFolderFilePath):
                print("[INFO]: Could not find matching file in secondFolderRoot for " + firstFolderFilePath)
                continue
            else:
                firstFolderFile = open(firstFolderFilePath)
                secondFolderFile = open(secondFolderFilePath)
                print("Diff between " + firstFolderFile.name + " and " + secondFolderFile.name + ":")
                # Find diff
                for line in difflib.unified_diff(firstFolderFile.readlines(), secondFolderFile.readlines()):
                    # fileDescriptor.write("Diff between "+firstFolderFile.name+" and "+secondFolderFile.name+":\n\n")
                    destFileName = secondFolderFile.name
                    filename = os.path.basename(destFileName)
                    basePath = 'output/' + os.path.dirname(destFileName)
                    print(basePath)
                    if not os.path.isdir(basePath):
                        p = pathlib.Path(basePath)
                        p.mkdir(parents=True)
                    copyfile(secondFolderFile.name, os.path.join(basePath, filename))
                    print(line,)
                    fileDescriptor.write(line)
            continue
        else:
            continue