python script to symlink ONLY CAMPAIGNS from a local l4d2 install to a l4d2 dedicated server. do py -m pip install vpk beforehand

l4d2_symlink.py

import vpk, glob, os, re

original_workshop_path = os.path.abspath('D:\\SteamLibrary\\steamapps\\common\\Left 4 Dead 2\\left4dead2\\addons\\workshop')
destination_addons_folder = os.getcwd() #intended to be ran in the addons folder of the dedicated server

allvpks = glob.glob(original_workshop_path+'\\*.vpk')
nicevpks = []
preparedregex = r'addonContent_Campaign[\s\t]+?1'

counter = 0
counter2 = 0
for i in allvpks:
    counter += 1
    pak1 = vpk.open(i)
    try:
        pakfile = pak1.get_file("addoninfo.txt") #mods with no addoninfos will not be copied for good measure.
        addoninfo = pakfile.read().decode('latin1')
        counter2 += 1
        if re.search(preparedregex,addoninfo,re.I): #exists: None, otherwise: <re.Match object; ...>
            nicevpks.append(i)
    except:
        print(f'Exception for file {os.path.basename(i)}')
        continue

print(f'Went through {counter} vpks, {counter2} addoninfos processed, {len(nicevpks)} campaigns.')

for i in nicevpks:
    os.symlink(i, os.path.join(destination_addons_folder,os.path.basename(i))) #remember to delete symlinks if they already exist in the dest first.