#!/usr/bin/env python3

# Compare two directory trees. Report files that are in one but not

# the other, regardless of where they are in the tree.

# Useful for devices like kobo that don't handle subdirectories well.

import sys, os

def build_index(d):

'''Build a dictionary of { filename: fullpath }

of every file under the directory d.

'''

index = {}

for root, dirs, files in os.walk(d):

for f in files:

index[f] = os.path.join(root, f)

return index

if __name__ == '__main__':

d1 = build_index(sys.argv[1])

d2 = build_index(sys.argv[2])

only_in_d1 = []

only_in_d2 = []

for f in d1:

if f not in d2:

only_in_d1.append(d1[f])

for f in d2:

if f not in d1:

only_in_d2.append(d2[f])

print("\n ==== Only in", sys.argv[1])

print('\n'.join(only_in_d1))

print("\n ==== Only in", sys.argv[2])

print('\n'.join(only_in_d2))