Syncs files which have been changed since last sync with dir

sync.py

#! python


import sys
import os
import logging
from shutil import copy
from pathlib import Path
from datetime import datetime


defaultTimestampName = ".syncstamp"
patternsForSync = ["*.c", "*.h"]


def getTimestampPath(folder):
    return os.path.join(folder, defaultTimestampName)


def createTimestamp(folder, timestamp=datetime.now().timestamp()):
    filename = getTimestampPath(folder)
    logging.debug("createTimestamp: writing {0} to {1}"
                  .format(timestamp, filename))
    file = open(filename, "w")
    file.write(str(timestamp))
    file.close()


def getLastSyncTimestamp(folder):
    try:
        path = getTimestampPath(folder)
        with open(path, "r") as file:
            return float(file.read())
    except(FileNotFoundError, ValueError) as e:
        logging.debug("getLastSyncTimestamp: " + str(e))
        return 0.0


def getFilesForSync(pathFrom, lastSyncTimestamp=0):
    folderFrom = Path(pathFrom)
    candidates = []
    for pattern in patternsForSync:
        candidates += list(folderFrom.rglob(pattern))

    result = []
    for candidate in candidates:
        try:
            mtime = os.path.getmtime(str(candidate))
            if(mtime > lastSyncTimestamp):
                result.append(str(candidate))
        except OSError as e:
            logging.debug("getFilesForSync: " + str(e))
            continue

    return result


def sync(files, pathFrom, pathTo):
    for file in files:
        relativePath = os.path.relpath(file, pathFrom)
        destination = os.path.join(pathTo, relativePath)
        print("{0} -> {1}".format(file, destination))
        copy(file, destination)


def printHelp(programName):
    print("Usage: " + programName + " <from> <to>")


def main(arguments=[]):
    if(len(arguments) < 3):
        printHelp(arguments[0])
        return 0

    pathFrom = arguments[1]
    pathTo = arguments[2]

    try:
        lastSyncTime = getLastSyncTimestamp(pathFrom)
        files = getFilesForSync(pathFrom, lastSyncTime)
        sync(files, pathFrom, pathTo)
        createTimestamp(pathFrom)
        print("DONE.")
    except OSError as e:
        logging.error("main: " + str(e))
        return -1


if __name__ == "__main__":
    code = main(sys.argv)
    sys.exit(code)