#!/usr/bin/env python
# -*- coding: utf-8 -*-
import os
import shutil


def copy(src, dst, ignore=None):
    if os.path.isdir(src):
        shutil.copytree(src, dst, True, ignore)
    else:
        shutil.copy(src, dst)


def open_file(path, mode='r'):
    if mode == 'w' or os.path.isfile(path):
        return open(path, mode)
    else:
        return None


def write_file(path, content):
    fd = open_file(path, mode='w')
    if fd:
        fd.write(content.encode('utf-8'))
        fd.close()
        return path
    else:
        return None


def read_file(path):
    content = ''
    fd = open_file(path)
    if fd:
        content = fd.read()
        fd.close()
        return content
    else:
        print("Error: could not open %s" % path)
        return content


def read_file_lines(path):
    content = []
    fd = open_file(path)
    if fd:
        content = fd.readlines()
        fd.close()
    return content


def get_lines(content):
    '''
    return list of content split by line.
    Leading/trailing blank lines are not reserved.
    '''
    return content.strip().split('\n')