mdbook-spec

mdbook-spec is an mdBook preprocessor that adds features to the Reference. It provides:

• Parsing and generation of grammar diagrams.
  • Automatic grammar production links.
  • Generation of the grammar summary appendix.
• Automatic standard library links.
• Handling of rule names.
  • Validation of the names.
  • Converting rule names to links.
  • Automatic rule link references.
  • Generation of links to rule tests.
  • Generation of the test summary.
• Support for admonitions.

Environment variables

There are a few environment variables that mdbook-spec uses, described in Building the Reference:

• SPEC_RELATIVE — Can be set to link external books to the live site.
• SPEC_DENY_WARNINGS — Whether warnings should be treated as errors.
• SPEC_RUST_ROOT — The path to a checkout of the rust-lang/rust GitHub repository. This is used for test linking.