#!/usr/bin/env python

# Modifies a map spreadsheet A->B or any file using a replacements spreadsheet

# A->C or B->C

import csv

import sys

import maps

    )

excluded_suffix_re = (

     '(?! )' # not if it's a word in a sentence

def repl_unescape_html(match): return unescape_html(match.group(0))

    def usage_err():

        raise SystemExit('Usage: '+opts.env_usage(env_names, True)+' '

            +sys.argv[0]+' <map repl [col_num] [| '+sys.argv[0]

            +' repl_1 [col_num_1]]... >new_map')

    text = opts.env_flag('text', False, env_names) # all patterns are plain text

    try: col_num = sys.argv[2]

    # Get replacements

    repls = []

    stream = open(repl_path, 'rb')

    reader = csv.reader(stream)

            if text or is_word: # match as whole-word text (like SQL identifier)

                in_str_re = re.escape(in_)

                q = quote_re

                in_ = '(?<='+q+')'+in_str_re+'(?='+q+')' # require quotes

                    # where a mapping adds a suffix which would cause the same

                    # replacement to be performed repeatedly

                    # only use excluded_prefix_re/excluded_suffix_re in text

                    # mode (used in renaming columns in SQL scripts), to prevent

                    # the special coding for column renames from also affecting

                    # regular regexp/word replacements

                    if text: in_word_re = (excluded_prefix_re+in_word_re

    def repl_all(str_):

            if with_ == 'unescape_html()': with_ = repl_unescape_html

            str_ = re.sub(repl, with_, str_)

    # Modify map or file

    if col_num != None:

        reader = csv.reader(sys.stdin)

        writer = csv.writer(sys.stdout)

        cols = reader.next()

        writer.writerow(cols)

        for row in reader:

            row[col_num] = repl_all(row[col_num])

            writer.writerow(row)

main()