Enhancement Request: kepub and Save to disk

[PeterT]

With the enhanced support in calibre for kepub format including the on-the-fly conversion to kepub on Send to device, would it be possible to enhance the Save to disk function to

1. Add the option to select kepub as a format without the book having an existing kepub format, and performing the same on-the-fly conversion as Send to Device and (like with Send to device) not add the kepub to the library.
2. Allow an option to select whether to name the resulting kepub either bookname.kepub OR bookname.kepub.epub

[theducks]

don't forget Save To Folder

Maybe that needs a 'Behave Like Device(driver) type' option

[chaley]

Originally Posted by theducks

don't forget Save To Folder

Maybe that needs a 'Behave Like Device(driver) type' option

This was discussed and implemented at PeterT's request. See https://www.mobileread.com/forums/sh...87#post4495387

What he is asking for now appears to be similar but for save to disk instead of send to device.

[PeterT]

This request was based on realising that while, it's easy to save content to either Google Drive or Dropbox from within calibre, and very easy to load that content onto a Kobo Libra Colour due to it's native cloud support, one was strictly limited to ePub only without doing a manual conversion to kepub in calibre, and then once the book was saved to the cloud, manually renaming it.

[kovidgoyal]

Seems like too much UI for something that can simply be implemented y converting to KEPUB.

[PeterT]

Yeah apart from the fact that the converted files have the .kepub extension as opposed to the desired .kepub.epub

[kovidgoyal]

Just stick the kobo device files into your folder and use connect to folder as Kobo device for it.

[PeterT]

The whole idea of trying to use the native cloud support is to selectively load content when away from home.

At times I grow frustrated by the hoops that some software expects one to jump through to use all of a device's features.

[chaley]

You could do this using a Python code action in action chains. It seems that the steps would be:

• Send the epub formats to disk. Use a known directory as the destination.
• Invoke the python action to change the epubs to kepub.epubs in the known directory by scanning the directory for epubs that aren't kepub.epub.

The python action would scan the directory (tree) for .epub without being .kepub.epub. For each file found, convert it by calling

calibre.ebooks.oeb.polish.kepubify.make_options()

setting the options as you wish, then

calibre.ebooks.oeb.polish.kepubify.kepubify_path()

setting "outfile" to the basename of the epub + ".kepub.epub". Finally, delete the source epub.

I haven't tried writing and running the code but it seems straight-forward.

EDIT: Of course, you could do the same thing using a python script, which might be a better solution because the script can take arguments more easily than the action.

[chaley]

Here is a python script that kepubifies epubs in a directory then removes the underlying epub. It is basic, for example missing setting up options.

from calibre.ebooks.oeb.polish.kepubify import kepubify_path
import os

books_dir = sys.argv[1]
for root, dirs, files in os.walk(books_dir):
    for f in files:
        base, ext = os.path.splitext(f)
        if ext == '.epub' and not base.endswith('kepub'):
            infile = os.path.join(root, f)
            outfile = os.path.join(root, base+'.kepub'+ext)
            print(infile, outfile)
            kepubify_path(infile, outfile)
            os.remove(infile)

It is called with

calibre-debug -e kepub.py full_path_to_directory

[PeterT]

Works like a charm. Of course I made a few mods.. Handles multiple book directories; add the #! to point to calibre-debug

Thanks!

[chaley]

If you don't like the default options you can use

def make_options(
    extra_css: str = '',
    affect_hyphenation: bool = False,
    disable_hyphenation: bool = False,
    hyphenation_min_chars: int = 6,
    hyphenation_min_chars_before: int = 3,
    hyphenation_min_chars_after: int = 3,
    hyphenation_limit_lines: int = 2,
    prefer_justification: bool = False,

    remove_widows_and_orphans: bool | None = None,
    remove_at_page_rules: bool | None = None,
) -> Options:

in the same py file as kepubify_path.