A preprocessor for mdbook to add Material Design admonishments, based on the mkdocs-material implementation.

It turns this:

```admonish info
A beautifully styled message.
```

into this:

Read the documentation here, to see the actual examples in action. You can see the source in the ./book subdirectory.

Projects using mdbook-admonish include:

• The Rhai Book (source)
• The Trunk Guide (source)
• PRQL language book (source)

Use any fenced code-block as you normally would, but annotate it with admonish <admonition type>:

```admonish example
My example is the best!
```

See the reference page for a list of supported admonitions. You'll find:

• info
• warning
• danger
• example

and quite a few more!

You can also leave out the admonition type altogether, in which case it will default to note:

```admonish
A plain note.
```

See the mdbook-admonish book for additional options, such as:

• Custom titles
• Custom styling
• Collapsible blocks

Install the tool:

cargo install mdbook-admonish

# If you get compilation/installation errors, try a locked installation
cargo install mdbook-admonish --locked

Then let mdbook-admonish add the required files and configuration:

# Note: this may need to be rerun for new minor versions of mdbook-admonish
# see the 'Semantic Versioning' section below for details.
mdbook-admonish install path/to/your/book

# optionally, specify a directory where CSS files live, relative to the book root
mdbook-admonish install --css-dir ./assets/css .

This will add the following configuration to your book.toml:

[preprocessor.admonish]
command = "mdbook-admonish"

[output.html]
additional-css = ["./mdbook-admonish.css"]

and copy the file mdbook-admonish.css into your book's directory.

Then, build your book as usual:

mdbook path/to/book

For a reproducible build suitable for use in CI or scripts, please:

• Pin to a specific version
• Install with lockfile dependencies
• Always install the latest CSS assets

cargo install mdbook-admonish --vers "1.5.0" --locked
mdbook-admonish install path/to/your/book

The Minimum Supported Rust Version (MSRV) is documented in Cargo.toml, and noted in the CHANGELOG.md. We aims to support around six months of stable Rust.

Please note, when updating your version of mdbook-admonish, updated styles will not be applied unless you rerun mdbook-admonish install to update the additional CSS files in your book.

mdbook will fail the build if you require newer assets than you have installed:

2022-04-26 12:27:52 [INFO] (mdbook::book): Book building has started
ERROR:
  Incompatible assets installed: required mdbook-admonish assets version '^2.0.0', but found '1.0.0'.
  Please run `mdbook-admonish install` to update installed assets.
2022-04-26 12:27:52 [ERROR] (mdbook::utils): Error: The "admonish" preprocessor exited unsuccessfully with exit status: 1 status

If you want to update across minor versions without breakage, you should always run mdbook-admonish install.

You can ensure that content inlined with {{#include}} is also processed by setting the after option:

[preprocessor.admonish]
after = ["links"]

This will expand include directives, before expanding admonish blocks.

Guarantees provided are as follows:

• Major versions: Contain breaking changes to the user facing markdown API, or the public API of the crate itself.
• Minor versions: Feature release. May contain changes to generated CSS/HTML requiring mdbook-admonish install to be rerun.
  • Note: updating acrosss minor versions without running mdbook-admonish install to reinstall assets may break your build.
  • This is due to limitations in the mdbook preprocessor architecture. Relevant issues that may alleviate this:
    • rust-lang/mdBook#1222
    • rust-lang/mdBook#1687
    • rust-lang/mdBook#1689
• Patch versions: Bug fixes only.

See CONTRIBUTING.md for guidelines on developing.

This utility is heavily drawn from and inspired by other projects, namely:

• mdbook-mermaid
• mkdocs-material
• material-design-icons

The licences for these projects are included in the licences folder.