music_reconcile.py

#!/usr/bin/env python
#
# Music collection reconcile - which tracks are new locally/on external HD?
#
# Basically a poor-man's rsync, but it seems faster for solely this task. Also
# less likely to generate false positives, although it can make false negatives
# e.g. if files have been changed (ID3 information etc.)

import sys
import glob

def reconcile(l,r):
    lr = {
      'local': {
        'arg': l, 'tracks': [], 'extra': [], 'other': 'remote'
      },
      'remote': {
        'arg': r, 'tracks': [], 'extra': [], 'other': 'local'
      }
    }
    print "Globbing both directories..."
    for k,v in lr.items():
        v['tracks'] = glob.glob(v['arg'] + "*/*/*.*")

    for k,v in lr.items():
        print "Checking for new %s tracks..." % k
        for t in [t for t in v['tracks'] if not t.replace(v['arg'], lr[v['other']]['arg']) in lr[v['other']]['tracks']]:
            v['extra'].append(t)
    print "Done."

    # Report any unmatched files
    for k,v in lr.items():
        if v['extra']:
            print "New %s tracks:" % k
            print "\t" + "\n\t".join(v['extra'])

try:
    # Normalize both directories for ease of stripping them off globs
    dir_local = sys.argv[1].rstrip("/") + "/"
    dir_remote = sys.argv[2].rstrip("/") + "/"
    # Run reconcile
    reconcile(dir_local, dir_remote)
except IndexError:
    print "Usage: %s dir_local dir_remote" % sys.argv[0]