diff 更新 检查脚本

工作中常需要对某些数据文件进行更新检查, 特写了个小脚本来完成.

#!/usr/bin/env python
# encoding: utf-8

"""
@filename   : diff_check.py
@Author     : [e-mail]
"""

import sys, getopt

_a_nums = 0
_c_nums = 0
_d_nums = 0

def _handle_a(line):
    global _a_nums
    _l = line.split('a')
    if len(_l) > 1:
        _ll = _l[1].split(',')
        if len(_ll) > 1:
            _a_nums = _a_nums + int(_ll[1]) - int(_ll[0]) + 1
        else:
            _a_nums = _a_nums + 1
    else:
        print 'bad a is catched'

def _handle_d(line):
    global _d_nums
    _l = line.split('d')
    if len(_l) > 1:
        _ll = _l[0].split(',')
        if len(_ll) > 1:
            _d_nums = _d_nums + int(_ll[1]) - int(_ll[0]) + 1
        else:
            _d_nums = _d_nums + 1
    else:
        print 'bad d is catched'

def _handle_c_c(line):
    _l = line.split(',')
    if len(_l) > 1:
        _cnt = int(_l[1]) - int(_l[0]) + 1
        return _cnt
    else:
        return 1

def _handle_c(line):
    global _c_nums
    _l = line.split('c')
    if len(_l) > 1:
        _d0 = _handle_c_c(_l[0])
        _d1 = _handle_c_c(_l[1])
        if _d0 >= _d1:
            _c_nums = _c_nums + _d0
        else:
            _c_nums = _c_nums + _d1
    else:
        print 'bad c is catched'

def _main():
    global input_file_name
    _rf = open(input_file_name, "r")
    while 1:
        line = _rf.readline()
        if not line:
            break
        if -1 != line.find('a'):
            _handle_a(line)
        elif -1 != line.find('d'):
            _handle_d(line)
        elif -1 != line.find('c'):
            _handle_c(line)
    _rf.close()

def _usage():
    print "./check_change.py -i inputfile.diff"

def _check_opt():
    global input_file_name
    opts, args = getopt.getopt(sys.argv[1:], "hi:o:")
    if ( len(sys.argv) < 2 ):
        _usage()
        sys.exit()
    for op, value in opts:
        if op == "-i":
            input_file_name = value
        elif op == "-h":
            _usage()
            sys.exit()
        else:
            _usage()
            sys.exit()


if __name__ == "__main__":
    input_file_name = "file.diff"
    _check_opt()
    _main()
    print '增加:', _a_nums
    print '删除:', _d_nums
    print '更新:', _c_nums
    print '共计:', _a_nums + _d_nums + _c_nums