Doesn't work with shared playlists

[jez]

Yeah this is kind of tricky.

The API endpoint we're using lets us list and modify playlists you have write access to, not so much "shared" playlists like those of the people you follow or that Spotify curates.

The workaround is to

• duplicate the playlist (select all, copy, paste)
• take a snapshot of the duplicated playlist
• anytime you'd like to have a snapshot of the original playlist:
  • duplicate it again by overwriting the old one, then
  • take a snapshot of the new, duplicated playlist

Obviously this is a sort of annoying workaround, but it does indeed work. I'd also be open to a pull request that adds support for some sort of operation like this.

[jez]

Update: TuneMachine now supports read-only snapshots of playlists you follow (think: Spotify's new Discover Weekly playlist, Top Charts, etc.). You can use the "New" button to make a new snapshot and can browse old snapshots, but you can't revert to an old version.

At least this lets you check out old versions and click to the "https://open.spotify.com/..." for songs hidden in old snapshots.