Some presets put the video title into a folder name (not just the file name). The code only shortened the file name, never the folder name. So a title with multi-byte characters (like bold/fancy Unicode, which take 4 bytes each) could make the folder name go over the OS 255-byte limit and crash with OSError: [Errno 36] File name too long.
This fix shortens every folder in the path too, not just the file name, while keeping the file extension. output_directory is left alone so real folders aren't touched.
Added a test with a title made of 4-byte bold Unicode characters.
Relates to #1092, #1189
-- Thanks @Nojyto for the contribution!
A complete gutting of the internals of ytdl-sub to support functions in our variable syntax, in addition to being able to access a yt-dlp entry's .info.json fields using functions. Functionally, ytdl-sub should still look and behave the same from a user-perspective.
With so many lines of code changed (+8927, -2708), no doubt there will be new issues. Please make a GH issue or reach out on Discord if your config/subscriptions break in any way/shape/form.
Details on how to use function support will come soon in the form of proper documentation in our readthedocs.
