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#!/usr/bin/env python
"""
Helper script to rebuild virtualenv.py from virtualenv_support
"""
import re
import os
import sys
here = os.path.dirname(__file__)
script = os.path.join(here, '..', 'virtualenv.py')
file_regex = re.compile(
r'##file (.*?)\n([a-zA-Z][a-zA-Z0-9_]+)\s*=\s*convert\("""(.*?)"""\)',
re.S)
file_template = '##file %(filename)s\n%(varname)s = convert("""\n%(data)s""")'
def rebuild():
f = open(script, 'rb')
content = f.read()
f.close()
parts = []
last_pos = 0
match = None
for match in file_regex.finditer(content):
parts.append(content[last_pos:match.start()])
last_pos = match.end()
filename = match.group(1)
varname = match.group(2)
data = match.group(3)
print('Found reference to file %s' % filename)
pathname = os.path.join(here, '..', 'virtualenv_embedded', filename)
f = open(pathname, 'rb')
c = f.read()
f.close()
new_data = c.encode('zlib').encode('base64')
if new_data == data:
print(' Reference up to date (%s bytes)' % len(c))
parts.append(match.group(0))
continue
print(' Content changed (%s bytes -> %s bytes)' % (
zipped_len(data), len(c)))
new_match = file_template % dict(
filename=filename,
varname=varname,
data=new_data)
parts.append(new_match)
parts.append(content[last_pos:])
new_content = ''.join(parts)
if new_content != content:
sys.stdout.write('Content updated; overwriting... ')
f = open(script, 'wb')
f.write(new_content)
f.close()
print('done.')
else:
print('No changes in content')
if match is None:
print('No variables were matched/found')
def zipped_len(data):
if not data:
return 'no data'
try:
return len(data.decode('base64').decode('zlib'))
except:
return 'unknown'
if __name__ == '__main__':
rebuild()
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