move itunes library

move_itl.py

import os.path
import shutil
import urllib.parse
from xml.sax import make_parser
from xml.sax.saxutils import XMLFilterBase
from xml.sax.saxutils import XMLGenerator


DEST = 'E:/music'


class MoveFilenamesFilter(XMLFilterBase):
    def __init__(self, *a):
        super().__init__(*a)
        self._all = set()
        self._el = self._last_key = self._content = ''

    def startElement(self, name, attrs):
        self._el = name
        self._content = ''
        super().startElement(name, attrs)

    def endElement(self, name):
        el, self._el = self._el, ''
        if el == 'key':
            self._last_key = self._content
            super().characters(self._content)
        elif el == 'string':
            if self._last_key == 'Location':
                parsed = urllib.parse.urlparse(self._content)
                old_path = urllib.parse.unquote(parsed.path.lstrip('/'))

                # uncomment to actually move
                # shutil.copy(old_path, DEST)
                # os.remove(old_path)
                new_path = f'{DEST}/{os.path.basename(old_path)}'
                if new_path in self._all:
                    raise AssertionError(new_path)
                self._all.add(new_path)
                parsed = parsed._replace(path=new_path)
                super().characters(urllib.parse.urlunparse(parsed))
            else:
                super().characters(self._content)
        super().endElement(name)

    def characters(self, content):
        if self._el in {'key', 'string'}:
            self._content += content
        else:
            super().characters(content)


class PListDoctype(XMLGenerator):
    def startDocument(self):
        super().startDocument()
        self._write('<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">\n')


def main():
    reader = MoveFilenamesFilter(make_parser())

    with open('itl_new.xml', 'w', encoding='UTF-8', newline='\r\n') as f:
        handler = PListDoctype(f, encoding='UTF-8', short_empty_elements=True)
        reader.setContentHandler(handler)
        reader.parse('iTunes Music Library.xml')


if __name__ == '__main__':
    exit(main())

Usage:

1. turn on xml mode for itunes
2. close itunes
3. make a backup of both the .xml and the .itl file in your itunes directory
4. copy iTunes Music Library.xml to a temporary directory
5. change the DEST variable
6. run the script (this'll be dry-run mode, with dupe checking)
7. uncomment the mutation bits
8. run the script
9. move the .itl file out of the way in your music directory
10. start itunes
11. "File -> Library -> Import Playlist" and select itl_new.xml