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diff --git a/README.rst b/README.rst new file mode 100644 index 0000000..6e5d8ca --- /dev/null +++ b/README.rst @@ -0,0 +1,98 @@ +Askama +====== + +.. image:: https://travis-ci.org/djc/askama.svg?branch=master + :target: https://travis-ci.org/djc/askama + +Askama implements a template rendering engine based on Jinja. +It generates Rust code from your templates at compile time +based on a user-defined ``struct`` to hold the template's context. +See below for an example. + +Currently implemented features: + +* Generates fully type-safe Rust code from your templates +* Template inheritance +* Basic loops and if/else if/else statements +* Whitespace suppressing with '-' markers +* Some built-in filters + +Askama is in heavy development, so it currently has some limitations: + +* Only a small subset of the intended expressions are supported in templates +* Only a small number of built-in template filters have been implemented +* User-defined template filters are not supported yet +* Not a lot of documentation has been written + +All feedback welcome. Feel free to file bugs, requests for documentation and +any other feedback to the `issue tracker`_ or `tweet me`_. + +.. _issue tracker: https://github.com/djc/askama/issues +.. _tweet me: https://twitter.com/djco/ + + +How to get started +------------------ + +First, add the following to your crate's ``Cargo.toml``: + +.. code-block:: + + // in section [package] + build = "build.rs" + + // in section [dependencies] + askama = "0.1" + askama_derive = "0.1" + + // in section [build-dependencies] + askama = "0.1" + +Custom derive macros can not be exported together with other items, +so you have to depend on a separate crate for it. +Because Askama will generate Rust code from your template files, +the crate will need to be recompiled when your templates change. +This is supported with a build script, ``build.rs``, +which needs askama as a build dependency: + +.. code-block:: rust + + extern crate askama; + + fn main() { + askama::rerun_if_templates_changed(); + } + +Now create a directory called ``templates`` in your crate root. +In it, create a file called ``hello.html``, containing the following: + +.. code-block:: jinja + + Hello, {{ name }}! + +In any Rust file inside your crate, add the following: + +.. code-block:: rust + + #[macro_use] + extern crate askama_derive; // for the custom derive implementation + extern crate askama; // for the Template trait + + use askama::Template; // bring trait in scope + + #[derive(Template)] // this will generate the code... + #[template(path = "hello.html")] // using the template in this path, relative + // to the templates dir in the crate root + struct HelloTemplate<'a> { // the name of the struct can be anything + name: &'a str, // the field name should match the variable name + // in your template + } + + fn main() { + let hello = HelloTemplate { name: "world" }; // instantiate your struct + println!("{}", hello.render()); // then render it. + } + +Review the `test cases`_ for more examples. + +.. _test cases: https://github.com/djc/askama/tree/master/testing/tests |