`gui.book_on_device` returns lower case book path for MTP devices

[xxyzz]

I'm using the book_on_device function to get book path on device but this function returns lower case path on MTP devices, could this function be updated? Or maybe there is another function I could use to get the correct book path on MTP devices?

[xxyzz]

I find the code converts the path to lower case: https://github.com/kovidgoyal/calibr..._cache.py#L177

but I don't know if calibre's developer would accept the change, I hope remove `.lower()` won't break other code.

[kovidgoyal]

That function is definitely not going to be changed. And IIRC paths in MTP are case insensitive.

[xxyzz]

Is there another function I could use to get the file name uploaded to mtp device by calibre? A user created an issue at https://github.com/xxyzz/WordDumb/issues/206 says calibre could change the book file name and my code would break using lower case path or the original book file name.

[kovidgoyal]

The lowercased path is what calibre uses as a key. So no there is no other function. WHy do you care if the path is lowercased?

[xxyzz]

Because I need to create a ".sdr" folder with the same name as the book file to put Kindle Word Wise file and X-Ray file, use the lower case folder name doesn't work for Kindle...

[xxyzz]

The upload book job results contain the correct book file name, I think I could use that value.

[kovidgoyal]

If you are sending the book file yourself then yes you can use it.

[chaley]

You can also try using os.path.realpath(lower_case_full_path).

In my tests on Windows 10 it converts an lcase path to the path as it really exists. I didn't try it on an MTP device.

Example:

import os.path
s = 'c:/users/me'
print(os.path.realpath(s))
C:\Users\Me