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author | Dirkjan Ochtman <dirkjan@ochtman.nl> | 2017-03-05 19:48:46 +0100 |
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committer | Dirkjan Ochtman <dirkjan@ochtman.nl> | 2017-03-05 19:51:21 +0100 |
commit | a56ee12990ab98d31614942203802790107515a8 (patch) | |
tree | a86b97354cee6e2c5231f24e68a7946bdb896de6 /README.rst | |
parent | b8c36fbdc87bc9748ca6b5afb12e2b037487e817 (diff) | |
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Rewrite README in Markdown
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diff --git a/README.rst b/README.rst deleted file mode 100644 index 7ef105f..0000000 --- a/README.rst +++ /dev/null @@ -1,153 +0,0 @@ -Askama -====== - -.. image:: https://img.shields.io/crates/v/askama.svg - :target: https://crates.io/crates/askama -.. image:: https://travis-ci.org/djc/askama.svg?branch=master - :target: https://travis-ci.org/djc/askama -.. image:: https://codecov.io/gh/djc/askama/branch/master/graph/badge.svg - :target: https://codecov.io/gh/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, or read `the documentation`_. - -**"Pretty exciting. I would love to use this already."** -- `Armin Ronacher`_, -creator of Jinja - -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 -* Works on stable Rust - -Askama is in heavy development, so it currently has some limitations: - -* 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 -* Debugging template problems is not always straightforward - -All feedback welcome. Feel free to file bugs, requests for documentation and -any other feedback to the `issue tracker`_ or `tweet me`_. - -.. _the documentation: https://docs.rs/askama -.. _Armin Ronacher: http://lucumr.pocoo.org/ -.. _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:: toml - - # 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. - } - -You should now be able to compile and run this code. - -Review the `test cases`_ for more examples. - -.. _test cases: https://github.com/djc/askama/tree/master/testing - - -Debugging and troubleshooting ------------------------------ - -You can view the parse tree for a template as well as the generated code by -changing the ``template`` attribute item list for the template struct: - -.. code-block:: rust - - #[derive(Template)] - #[template(path = "hello.html", print = "all")] - struct HelloTemplate<'a> { ... } - -The ``print`` key can take one of four values: - -* ``none`` (the default value) -* ``ast`` (print the parse tree) -* ``code`` (print the generated code) -* ``all`` (print both parse tree and code) - -The parse tree looks like this for the example template: - -.. code-block:: - - [Lit("", "Hello,", " "), Expr(WS(false, false), Var("name")), - Lit("", "!", "\n")] - -The generated code looks like this: - -.. code-block:: rust - - #[allow(dead_code, non_camel_case_types)] - type TemplateFromhello2ehtml<'a> = HelloTemplate<'a>; - impl<'a> askama::Template for HelloTemplate<'a> { - fn render_to(&self, writer: &mut std::fmt::Write) { - writer.write_str("Hello,").unwrap(); - writer.write_str(" ").unwrap(); - writer.write_fmt(format_args!("{}", self.name)).unwrap(); - writer.write_str("!").unwrap(); - writer.write_str("\n").unwrap(); - } - } |