Last active
March 6, 2024 21:31
-
-
Save Rurik/6556041 to your computer and use it in GitHub Desktop.
Python functions to compress folder paths to include their environment variable. This is the opposite of os.path.expandvars(). For example, "C:\Windows\system32\cmd.exe" would resolve to "%WINDIR%\system32\cmd.exe".
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#@bbaskin | |
import os | |
import re | |
# Thanks to Andrew Havens of Cipher Tech for figuring out how to escape the paranthesis to work with | |
# both expandvars and regex | |
def generalize_vars_init(): | |
""" | |
Initialize a dictionary with the local system's environment variables. | |
Returns: | |
path_generalize_list: A Python dictionary of path:variable. | |
""" | |
envvar_list = [r'%ALLUSERSPROFILE%', | |
r'%LOCALAPPDATA%', | |
r'%APPDATA%', | |
r'%COMMONPROGRAMFILES%', | |
r'%PROGRAMDATA%', | |
r'%PROGRAMFILES%', | |
r'%PROGRAMFILES(x86)%', | |
r'%PUBLIC%', | |
r'%TEMP%', | |
r'%USERPROFILE%', | |
r'%WINDIR%'] | |
path_generalize_list = {} | |
for env in envvar_list: | |
resolved = os.path.expandvars(env).encode('unicode_escape') | |
resolved = resolved.replace('(', '\\(').replace(')', '\\)') | |
if not resolved == env: | |
path_generalize_list[resolved] = env | |
return path_generalize_list | |
def generalize_var(d, string): | |
""" | |
Performs a multiple find/replace on a string based on a given dictionary. | |
Args: | |
d: Python dictionary of text as: search:replace | |
string: string to perform replacement on | |
Returns: | |
A string value with replacements made. | |
""" | |
search = '(?i)' + '|'.join('(%s)' % key for key in d.iterkeys()) | |
regex = re.compile(search) | |
lookup = dict((index + 1, value) for index, value in enumerate(d.itervalues())) | |
return regex.sub(lambda match: match.expand(lookup[match.lastindex]), string) | |
if __name__ == '__main__': | |
lookup = generalize_vars_init() | |
strings = [r'C:\Windows\System32\cmd.exe', r'C:\Program Files\testing123', r'C:\ProgramData\Folder\File'] | |
for s in strings: | |
print ('%s => %s' % (s, generalize_var(lookup, s))) |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment