1e78b9fe7c
The search category can disappear from field_metadata. Perhaps other dynamic categories can as well. The implication is that dynamic categories are being removed, but how that would happen is a mystery. I suspect a plugin is operating on the "real" field_metadata instead of a copy, thereby changing the dict used by the rest of calibre. As it can happen, to avoid key errors check that a category exists before offering to unhide it.
calibre
calibre is an e-book manager. It can view, convert, edit and catalog e-books in all of the major e-book formats. It can also talk to e-book reader devices. It can go out to the internet and fetch metadata for your books. It can download newspapers and convert them into e-books for convenient reading. It is cross platform, running on Linux, Windows and macOS.
For more information, see the calibre About page.
Screenshots
Usage
See the User Manual.
Development
Setting up a development environment for calibre.
A tarball of the source code for the current calibre release.
Bugs
Bug reports and feature requests should be made in the calibre bug tracker at Launchpad. GitHub is only used for code hosting and pull requests.
Support calibre
calibre is a result of the efforts of many volunteers from all over the world. If you find it useful, please consider contributing to support its development. Donate to support calibre development.
Building calibre binaries
See Build instructions for instructions on how to build the calibre binaries and installers for all the platforms calibre supports.
calibre package versions in various repositories
