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#!/usr/bin/env python
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# Modifies a map spreadsheet A->B or any file using a replacements spreadsheet
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# A->C or B->C
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import csv
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import HTMLParser
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import os.path
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import re
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import sys
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sys.path.append(os.path.dirname(__file__)+"/../lib")
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import maps
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import opts
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import strings
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quote_re = '[\'"`]'
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excluded_prefix_re = (
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'(?<![a-z] )' #not if it's a word in a sentence (uppercase SQL keywords OK)
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+'(?<!-)' # not if it's part of a '-'-separated identifier
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+'(?<!\*)' # don't double leading *
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)
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excluded_suffix_re = (
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'(?! [a-z])' # not if it's a word in a sentence (uppercase SQL keywords OK)
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+'(?!-)' # not if it's part of a '-'-separated identifier
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)
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def unescape_html(str_): return HTMLParser.HTMLParser().unescape(str_)
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def repl_unescape_html(match): return unescape_html(match.group(0))
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def main():
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env_names = []
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def usage_err():
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raise SystemExit('Usage: '+opts.env_usage(env_names, True)+' '
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+sys.argv[0]+' <map repl [col_num] [| '+sys.argv[0]
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+' repl_1 [col_num_1]]... >new_map')
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col_num = None
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try: col_num = sys.argv[2]
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except IndexError: pass
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if col_num != None: col_num = int(col_num) # 0-based
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# whether all patterns are plain text
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# defaults to on if matching entire cells in a spreadsheet (w/ col_num)
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text = opts.env_flag('text', col_num != None, env_names)
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try: _prog_name, repl_path = sys.argv[:2]
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except ValueError: usage_err()
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# Get replacements
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repls = []
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stream = open(repl_path, 'rb')
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reader = csv.reader(stream)
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reader.next() # skip header
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for row in reader:
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in_, out = row[:2]
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if in_ != '':
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is_word = re.match(r'^\w+$', in_)
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if text or is_word: # match as whole-word text (like SQL identifier)
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# this can also be done in Postgres with expression substitution
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# (wiki.vegpath.org/Postgres_queries#expression-substitution)
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# this is a generalization of lib/sql_gen.py map_expr() to work
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# on entire source files
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in_str_re = re.escape(in_)
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q = quote_re
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in_ = '(?<='+q+')'+in_str_re+'(?='+q+')' # require quotes
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if is_word: # also match with quotes optional
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# don't try to match word w/ suffix, because there are cases
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# where a mapping adds a suffix which would cause the same
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# replacement to be performed repeatedly
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in_word_re = r'\b'+in_str_re+r'\b'
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# only use excluded_prefix_re/excluded_suffix_re in text
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# mode (used in renaming columns in SQL scripts), to prevent
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# the special coding for column renames from also affecting
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# regular regexp/word replacements
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if text: in_word_re = (excluded_prefix_re+in_word_re
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+excluded_suffix_re)
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in_ = '(?:'+in_+'|'+in_word_re+')'
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repls.append((r'(?m)'+in_, out))
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stream.close()
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def repl_all(str_):
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str_ = strings.ustr(str_)
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for repl, with_ in repls:
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if with_ == 'unescape_html()': with_ = repl_unescape_html
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str_ = re.sub(repl, with_, str_)
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return str_
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# Modify map or file
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if col_num != None:
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reader = csv.reader(sys.stdin)
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writer = csv.writer(sys.stdout)
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cols = reader.next()
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writer.writerow(cols)
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for row in reader:
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row[col_num] = repl_all(row[col_num])
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writer.writerow(row)
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else: sys.stdout.write(strings.to_raw_str(repl_all(sys.stdin.read())))
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main()
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