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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 | |
parent | b8c36fbdc87bc9748ca6b5afb12e2b037487e817 (diff) | |
download | askama-a56ee12990ab98d31614942203802790107515a8.tar.gz askama-a56ee12990ab98d31614942203802790107515a8.tar.bz2 askama-a56ee12990ab98d31614942203802790107515a8.zip |
Rewrite README in Markdown
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-rw-r--r-- | README.rst | 153 |
2 files changed, 149 insertions, 153 deletions
diff --git a/README.md b/README.md new file mode 100644 index 0000000..fd108ab --- /dev/null +++ b/README.md @@ -0,0 +1,149 @@ +# Askama + +[![Latest version](https://img.shields.io/crates/v/askama.svg)](https://crates.io/crates/askama) +[![Build status](https://api.travis-ci.org/djc/askama.svg?branch=master)](https://travis-ci.org/djc/askama) +[![Code coverage](https://codecov.io/gh/djc/askama/branch/master/graph/badge.svg)](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][docs]. + +**"Pretty exciting. I would love to use this already."** -- +[Armin Ronacher][mitsuhiko], 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][issues] or [tweet me][twitter]. + +[docs]: https://docs.rs/askama +[mitsuhiko]: http://lucumr.pocoo.org/ +[issues]: https://github.com/djc/askama/issues +[twitter]: https://twitter.com/djco/ + + +How to get started +------------------ + +First, add the following to your crate's `Cargo.toml`: + +```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: + +```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: + +``` +Hello, {{ name }}! +``` + +In any Rust file inside your crate, add the following: + +```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: + +```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: + +``` +[Lit("", "Hello,", " "), Expr(WS(false, false), Var("name")), +Lit("", "!", "\n")] +``` + +The generated code looks like this: + +```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(); + } +} +``` 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(); - } - } |