On Linux, we have `mpv.desktop`, and on macOS, we have `osxbundle`, both
of which handle file associations and protocol registration in the
system environment.
On Windows, this information is stored in the registry, so this commit
adds support for it.
It registers the application, supported file types, and supported
protocols, and adds an uninstall entry so users can remove all
registrations via the control panel. Note that this does not remove the
binary itself.
The implementation is fully portable. There are no external installers,
as mpv handles everything automatically. This should improve usability
when moving binaries and so on.
- `mpv --register` registers mpv (see verbose output for a list of actions).
- `mpv --unregister` reverts all changes made during installation.
- `mpv --register-rpath <string>` allows specifying a string to be
prepended to `PATH` before running mpv. This is useful when using
external dependencies that shouldn't be added globally to `PATH`.
Kacper Michajłow
4f08802ff1