Maintenance doesn't follow mainstream `mdbook`?

[michalfita]

With mdbook v0.5.1 installed, mdbook-epub v0.4.48 run as plug-in fails with:

 INFO Invoking the "epub" renderer
Running mdbook-epub as plugin waiting on the STDIN input. If you wanted to process the files in the current folder, use the -s flag from documentation, See: mdbook-epub --help
[2025-11-20T19:27:00Z ERROR mdbook_epub] Unable to parse render context
ERROR Renderer exited with non-zero return code.
ERROR Rendering failed
	Caused by: The "epub" renderer failed

with RUST_LOG=debug:

 INFO Book building has started
 INFO Running the epub backend
 INFO Invoking the "epub" renderer
[2025-11-20T19:40:49Z INFO  mdbook_epub] Booting EPUB generator...
[2025-11-20T19:40:49Z DEBUG mdbook_epub] prepared generator args = Args { standalone: false, root: "." }
[2025-11-20T19:40:49Z DEBUG mdbook_epub] run EPUB book build...
Running mdbook-epub as plugin waiting on the STDIN input. If you wanted to process the files in the current folder, use the -s flag from documentation, See: mdbook-epub --help
[2025-11-20T19:40:49Z ERROR mdbook_epub] Unable to parse render context
ERROR Renderer exited with non-zero return code.
ERROR Rendering failed
	Caused by: The "epub" renderer failed

Is this result of incompatibilities with the new mdbook minor version, or something else?

[blandger]

result of incompatibilities with the new mdbook

Probably, that needs investigation.

[michalfita]

OK, took me 30 minutes including release builds and installation to fix this. Renders my book as epub. The mdbook-pandoc is broken as well - the mainstream mdbook changed structure and now has separate library crates.

I'm going to PR this, but it's breaking change and would render mdbook-epub inoperable with mdbook v0.4.x.