mdbook build creates broken links in v0.1.9

[cauebs]

If you use mdbook serve, it will work fine. v0.1.8 also works fine.

[mattico]

Can you give an example of a book/link which does not work correctly? Things seem to work fine for me.

[cauebs]

This one, for example: https://github.com/cauebs/rust-cli-talk/
Just build it with v0.1.9 and open it in the browser. All CSS and JS fails to load.
If you want, I can try to reproduce it in a minimal example.

[mattico]

Yes, I see the issue now. For some reason the book uses ../ as its path_to_root, from the changes in #603.

[mattico]

Okay, found the bug. index.html is generated from the first chapter, which in this case is in a subdirectory. The path_to_root is ../ to escape the subdirectory but index.html is rendered into the root. This function was not updated by #603:

https://github.com/rust-lang-nursery/mdBook/blob/b5fd170008085720815489e984bc9699fdb0423b/src/renderer/html_handlebars/hbs_renderer.rs#L102-L106

[mattico]

Hmm, I thought that #603 was included in 0.1.8, but it's actually first in 0.1.9. I thought that #603 was backwards-compatible modulo bugs, but after reading it again, it is not. Any link relative to the book root will break, and many existing books use these. Therefore, I'm going to yank 0.1.9 and 0.1.10 to follow semver. I'll release a 0.2.0 from master shortly after.