Tool for diffing zip files (and related files, like jars)

zipdiff.py

import zipfile
from sys import argv, exit

# Open
if len(argv) < 3:
    print("Usage: zipdiff.py old.zip new.zip <dont smoosh folders")
    exit(0)

za, zb = zipfile.ZipFile(argv[1]), zipfile.ZipFile(argv[2])
sa, sb = set(za.infolist()), set(zb.infolist())
da = {i.filename:i for i in sa}
db = {i.filename:i for i in sb}
smoosh_folders = True
if len(argv) > 3:
    smoosh_folders = False

# Get stuff
def remove_underlings(l):
    l = list(set(l))
    l.sort()
    if not smoosh_folders:
        return l
    dirs = {}
    ret = []
    for i in l:
        if (dir := next((x for x in list(dirs.keys()) if i.startswith(x)), False)):
            dirs[dir] += 1
        elif i.endswith("/"):
            dirs[i] = 0
        else:
            ret.append(i)
    # Add back the dirs
    ret.extend([p + " (" + str(k) + " files)" for (p,k) in dirs.items()])
    return ret

added = remove_underlings([i.filename for i in sb if not da.get(i.filename)])
removed = remove_underlings([i.filename for i in sa if not db.get(i.filename)])
modified = remove_underlings([i.filename for i in sb if (j:=da.get(i.filename)) and i.CRC != j.CRC])

# Print
def plist(p,l):
    p += ": "
    print(p, end='')
    print(*l, sep="\n" + p)

plist("Added", added)
plist("Removed", removed)
plist("Modified", modified)

# Print summary
print("\nSummary:")
print("- Files in A: " + str(len(sa)))
print("- Files in B: " + str(len(sb)))
print("- Added: "      + str(len(added)))
print("- Removed: "    + str(len(removed)))
print("- Modified: "   + str(len(modified)))