ref-manual: classes.rst: suppress rust-hello-world reference, add ptest-cargo class

(From yocto-docs rev: 8b1f41ebef4e02d9b0d50ce7e69cb90c83eb4324)

Signed-off-by: Frederic Martinsons <frederic.martinsons@gmail.com>
Reviewed-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 18 insertions, 4 deletions

diff --git a/documentation/ref-manual/classes.rst b/documentation/ref-manual/classes.rst
index a7819d5b60..973070dfb1 100644
--- a/documentation/ref-manual/classes.rst
+++ b/documentation/ref-manual/classes.rst
@@ -266,12 +266,15 @@ 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``
+``cargo new`` command, containing a ``Cargo.toml`` file, a ``Cargo.lock`` 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
+If you want to build and package tests of the program, inherit the
+:ref:`ref-classes-ptest-cargo` class instead of :ref:`ref-classes-cargo`.
+
+You will find an example (that show also how to handle possible git source dependencies) in the
+:oe_git:`zvariant_3.12.0.bb </openembedded-core/tree/meta-selftest/recipes-extended/zvariant/zvariant_3.12.0.bb>`
+recipe. Another example, with only crate 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.
@@ -2517,6 +2520,17 @@ the class' functionality is largely disabled unless "ptest" appears in
 section in the Yocto Project Development Tasks Manual for more information
 on ptest.
 
+.. _ref-classes-ptest-cargo:
+
+``ptest-cargo``
+===============
+
+The :ref:`ref-classes-ptest-cargo` class is a class which extends the
+:ref:`ref-classes-cargo` class and adds ``compile_ptest_cargo`` and
+``install_ptest_cargo`` steps to respectively build and install
+test suites defined in the ``Cargo.toml`` file, into a dedicated
+``-ptest`` package.
+
 .. _ref-classes-ptest-gnome:
 
 ``ptest-gnome``