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| -rw-r--r-- | documentation/ref-manual/classes.rst | 78 |
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diff --git a/documentation/ref-manual/classes.rst b/documentation/ref-manual/classes.rst index 0cb507b500..b5443c0d0a 100644 --- a/documentation/ref-manual/classes.rst +++ b/documentation/ref-manual/classes.rst @@ -254,8 +254,68 @@ When inherited globally, prints statistics at the end of the build on sstate re-use. In order to function, this class requires the :ref:`ref-classes-buildstats` class be enabled. +.. _ref-classes-cargo: + +``cargo`` +========= + +The :ref:`ref-classes-cargo` class allows to compile Rust language programs +using `Cargo <https://doc.rust-lang.org/cargo/>`__. Cargo is Rust's package +manager, allowing to fetch package dependencies and build your program. + +Using this class makes it very easy to build Rust programs. All you need +is to use the :term:`SRC_URI` variable to point to a source repository +which can be built by Cargo, typically one that was created by the +``cargo new`` command, containing a ``Cargo.toml`` file and a ``src`` +subdirectory. + +You will find a simple example in the +:oe_git:`rust-hello-world_git.bb </openembedded-core/tree/meta/recipes-extended/rust-example/rust-hello-world_git.bb>` +recipe. A more complex example, with package dependencies, is the +:oe_git:`uutils-coreutils </meta-openembedded/tree/meta-oe/recipes-core/uutils-coreutils>` +recipe, which was generated by the `cargo-bitbake <https://crates.io/crates/cargo-bitbake>`__ +tool. + +This class inherits the :ref:`ref-classes-cargo_common` class. + +.. _ref-classes-cargo_common: + +``cargo_common`` +================ + +The :ref:`ref-classes-cargo_common` class is an internal class +that is not intended to be used directly. + +An exception is the "rust" recipe, to build the Rust compiler and runtime +library, which is built by Cargo but cannot use the :ref:`ref-classes-cargo` +class. This is why this class was introduced. + .. _ref-classes-ccache: +.. _ref-classes-cargo-update-recipe-crates: + +``cargo-update-recipe-crates`` +=============================== + +The :ref:`ref-classes-cargo-update-recipe-crates` class allows +recipe developers to update the list of Cargo crates in :term:`SRC_URI` +by reading the ``Cargo.lock`` file in the source tree. + +To do so, create a recipe for your program, for example using +:doc:`devtool </ref-manual/devtool-reference>`, +make it inherit the :ref:`ref-classes-cargo` and +:ref:`ref-classes-cargo-update-recipe-crates` and run:: + + bitbake -c update_crates recipe + +This creates a ``recipe-crates.inc`` file that you can include in your +recipe:: + + require ${BPN}-crates.inc + +That's also something you can achieve by using the +`cargo-bitbake <https://crates.io/crates/cargo-bitbake>`__ tool. + ``ccache`` ========== @@ -2493,6 +2553,24 @@ For information on how root filesystem images are created, see the ":ref:`overview-manual/concepts:image generation`" section in the Yocto Project Overview and Concepts Manual. +.. _ref-classes-rust: + +``rust`` +======== + +The :ref:`ref-classes-rust` class is an internal class which is just used +in the "rust" recipe, to build the Rust compiler and runtime +library. Except for this recipe, it is not intended to be used directly. + +.. _ref-classes-rust-common: + +``rust-common`` +=============== + +The :ref:`ref-classes-rust-common` class is an internal class to the +:ref:`ref-classes-cargo_common` and :ref:`ref-classes-rust` classes and is not +intended to be used directly. + .. _ref-classes-sanity: ``sanity`` |