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#!/usr/bin/env python
import sys
import re
from helpers import *
PROGRAM_USAGE = """
SeqAn script to replace invalid identifiers (previously collected) in the SeqAn
codebase.
USAGE: replace_identifiers.py BASE_PATH [REPLACEMENTS]
BASE_PATH is the root path of all the folders to be searched.
REPLACEMENTS is a file of ``"key:value"`` pairs which contain the invalid
identifier and the replacement string.
If this file is not given, it is attemped to read the replacements from the
standard input stream.
""".strip()
def replace_all(text, subst):
"""
Perform the substitutions given by the dictionary ``subst`` on ``text``.
"""
for old in subst.keys():
text = old.sub(subst[old], text)
return text
def validate_file(file, subst):
"""
Perform the substitutions given by the dictionary ``subst`` on ``file``.
"""
#print file
code = ''
try:
f = open(file, 'r')
finally:
code = f.read()
old_len = len(code)
replaced = replace_all(code, subst)
#assert old_len == len(replaced)
open(file, 'w').write(replaced)
def build_subst_table(file):
"""
Read the substitutions defined in ``file`` and build a substitution table.
"""
table = {}
for line in file:
old, new = line.rstrip('\r\n').split(':')
table[re.compile(r'\b%s\b' % old.strip())] = new.strip()
return table
def main():
# Either read from stdin or expect a file path in the second argument.
# Since there is no reliable way of checking for an attached stdin on
# Windows, just assume good faith if the file name isn't given.
use_stdin = len(sys.argv) == 2
if not (len(sys.argv) == 3 or use_stdin):
print >>sys.stderr, 'ERROR: Invalid number of arguments.'
print >>sys.stderr, PROGRAM_USAGE
return 1
if use_stdin:
print >>sys.stderr, "Attempting to read from stdin ..."
project_path = sys.argv[1]
replacements_file = sys.stdin if use_stdin else open(sys.argv[2], 'r')
substitutions = build_subst_table(replacements_file)
for file in all_files(project_path):
validate_file(file, substitutions)
return 0
if __name__ == '__main__':
sys.exit(main())
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