Looking to convert an epub to mobi with calibre:
nicholas@gondor:~/ebooks$
nicholas@gondor:~/ebooks$ flatpak --command="sh" run com.calibre_ebook.calibre -c "ebook-convert ~/in.epub ~/out.mobi"
Cannot read from /home/nicholas/in.epub
nicholas@gondor:~/ebooks$
nicholas@gondor:~/ebooks$ ll
total 1200
drwxrwxr-x 2 nicholas nicholas 4096 Jul 18 13:43 ./
drwxr-xr-x 28 nicholas nicholas 4096 Jul 18 13:16 ../
-rw-r--r-- 1 nicholas nicholas 1220236 Jul 18 13:16 in.epub
nicholas@gondor:~/ebooks$
nicholas@gondor:~/ebooks$ uname -a
Linux gondor 5.8.0-59-generic #66-Ubuntu SMP Thu Jun 17 00:46:01 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
nicholas@gondor:~/ebooks$
nicholas@gondor:~/ebooks$ flatpak info com.calibre_ebook.calibre
calibre - The one stop solution to all your e-book needs
ID: com.calibre_ebook.calibre
Ref: app/com.calibre_ebook.calibre/x86_64/stable
Arch: x86_64
Branch: stable
Version: 5.23.0
License: GPL-3.0
Origin: flathub
Collection: org.flathub.Stable
Installation: system
Installed: 360.9 MB
Runtime: org.freedesktop.Platform/x86_64/20.08
Sdk: org.freedesktop.Sdk/x86_64/20.08
Commit: 13464e660f35716a725261af4b45d3abc199a3ce52ebdd9ee887c7ae623b5873
Parent: 4f7f3b603f31cc781caf8260f887118a1bb466748891c9e122826728e25d3eed
Subject: Update calibre-5.22.1-x86_64.txz to 5.23.0 (9184a3f3)
Date: 2021-07-11 19:56:21 +0000
nicholas@gondor:~/ebooks$
The file was readable and converted to mobi fine with an online converter. The converted file loaded on a Kindle fine, so there's presumably no problem with the epub itself. The book is readable on the Kindle, converted fine.
How is this accomplished from the console using the flatpak install of calibre?
note: the GUI for calibre reads from the home directory fine and adds books to its library. This book is, in fact, in the calibre library. The scope of the question is just how to use the conversion script for the flatpak install of calibre.
There's nothing odd or unique about permissions to directories, it's a vanilla install. Presumably some flatpak weirdness.
