oeqa: add "maturin develop" SDK test case

'maturin develop' first checks that a virtual environment
has been created, which is a good test for our python3 SDK
environment ;)

Source for guessing-game lifted from https://www.maturin.rs/tutorial

The test case is expected to fetch any necessary crates, build a
development version of the crate and package it as a wheel

Needs at a minimum the following in e.g. local.conf:
TOOLCHAIN_HOST_TASK:append = " nativesdk-python3-maturin"
SDK_INCLUDE_TOOLCHAIN = '1'
SDK_TOOLCHAIN_LANGS += 'rust'

The output of 'maturin develop' should be something like:
...
🔗 Found pyo3 bindings with abi3 support for Python ≥ 3.8
🐍 Not using a specific python interpreter
📡 Using build options features from pyproject.toml
   ...
   Compiling guessing-game v0.1.0 (/path/to/guessing-game)
    Finished dev [unoptimized + debuginfo] target(s) in 7.14s
📦 Built wheel for abi3 Python ≥ 3.8 to /path/to/tmpdir/guessing_game-0.1.0-cp38-abi3-linux_x86_64.whl
🛠 Installed guessing-game-0.1.0

(From OE-Core rev: 5265dd0b102cd7f3c6bb2ae1b18e9f625b834b39)

Signed-off-by: Tim Orling <tim.orling@konsulko.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

6 files changed, 349 insertions, 1 deletions

diff --git a/meta/lib/oeqa/files/maturin/guessing-game/Cargo.toml b/meta/lib/oeqa/files/maturin/guessing-game/Cargo.toml
new file mode 100644
index 0000000000..de95025e86
--- /dev/null
+++ b/meta/lib/oeqa/files/maturin/guessing-game/Cargo.toml
@@ -0,0 +1,20 @@
+[package]
+name = "guessing-game"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[lib]
+name = "guessing_game"
+# "cdylib" is necessary to produce a shared library for Python to import from.
+crate-type = ["cdylib"]
+
+[dependencies]
+rand = "0.8.4"
+
+[dependencies.pyo3]
+version = "0.19.0"
+# "abi3-py38" tells pyo3 (and maturin) to build using the stable ABI with minimum Python version 3.8
+features = ["abi3-py38"]
+
diff --git a/meta/lib/oeqa/files/maturin/guessing-game/LICENSE-APACHE b/meta/lib/oeqa/files/maturin/guessing-game/LICENSE-APACHE
new file mode 100644
index 0000000000..16fe87b06e
--- /dev/null
+++ b/meta/lib/oeqa/files/maturin/guessing-game/LICENSE-APACHE
@@ -0,0 +1,201 @@
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diff --git a/meta/lib/oeqa/files/maturin/guessing-game/LICENSE-MIT b/meta/lib/oeqa/files/maturin/guessing-game/LICENSE-MIT
new file mode 100644
index 0000000000..c4a9a58791
--- /dev/null
+++ b/meta/lib/oeqa/files/maturin/guessing-game/LICENSE-MIT
@@ -0,0 +1,25 @@
+Copyright (c) 2018 konstin
+
+Permission is hereby granted, free of charge, to any
+person obtaining a copy of this software and associated
+documentation files (the "Software"), to deal in the
+Software without restriction, including without
+limitation the rights to use, copy, modify, merge,
+publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software
+is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice
+shall be included in all copies or substantial portions
+of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
+ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.
diff --git a/meta/lib/oeqa/files/maturin/guessing-game/pyproject.toml b/meta/lib/oeqa/files/maturin/guessing-game/pyproject.toml
new file mode 100644
index 0000000000..ff35abc472
--- /dev/null
+++ b/meta/lib/oeqa/files/maturin/guessing-game/pyproject.toml
@@ -0,0 +1,8 @@
+[build-system]
+requires = ["maturin>=1.0,<2.0"]
+build-backend = "maturin"
+
+[tool.maturin]
+# "extension-module" tells pyo3 we want to build an extension module (skips linking against libpython.so)
+features = ["pyo3/extension-module"]
+
diff --git a/meta/lib/oeqa/files/maturin/guessing-game/src/lib.rs b/meta/lib/oeqa/files/maturin/guessing-game/src/lib.rs
new file mode 100644
index 0000000000..6828466ed1
--- /dev/null
+++ b/meta/lib/oeqa/files/maturin/guessing-game/src/lib.rs
@@ -0,0 +1,48 @@
+use pyo3::prelude::*;
+use rand::Rng;
+use std::cmp::Ordering;
+use std::io;
+
+#[pyfunction]
+fn guess_the_number() {
+    println!("Guess the number!");
+
+    let secret_number = rand::thread_rng().gen_range(1..101);
+
+    loop {
+        println!("Please input your guess.");
+
+        let mut guess = String::new();
+
+        io::stdin()
+            .read_line(&mut guess)
+            .expect("Failed to read line");
+
+        let guess: u32 = match guess.trim().parse() {
+            Ok(num) => num,
+            Err(_) => continue,
+        };
+
+        println!("You guessed: {}", guess);
+
+        match guess.cmp(&secret_number) {
+            Ordering::Less => println!("Too small!"),
+            Ordering::Greater => println!("Too big!"),
+            Ordering::Equal => {
+                println!("You win!");
+                break;
+            }
+        }
+    }
+}
+
+/// A Python module implemented in Rust. The name of this function must match
+/// the `lib.name` setting in the `Cargo.toml`, else Python will not be able to
+/// import the module.
+#[pymodule]
+fn guessing_game(_py: Python, m: &PyModule) -> PyResult<()> {
+    m.add_function(wrap_pyfunction!(guess_the_number, m)?)?;
+
+    Ok(())
+}
+
diff --git a/meta/lib/oeqa/sdk/cases/maturin.py b/meta/lib/oeqa/sdk/cases/maturin.py
index 14245bc36e..ea10f568b2 100644
--- a/meta/lib/oeqa/sdk/cases/maturin.py
+++ b/meta/lib/oeqa/sdk/cases/maturin.py
@@ -4,9 +4,12 @@
 # SPDX-License-Identifier: MIT
 #
 
+import os
+import shutil
 import unittest
-from oeqa.sdk.case import OESDKTestCase
 
+from oeqa.core.utils.path import remove_safe
+from oeqa.sdk.case import OESDKTestCase
 from oeqa.utils.subprocesstweak import errors_have_output
 
 errors_have_output()
@@ -31,3 +34,46 @@ class MaturinTest(OESDKTestCase):
             output,
             r" - CPython %s (.+)/usr/bin/python%s$" % (python_version, python_version),
         )
+
+
+class MaturinDevelopTest(OESDKTestCase):
+    @classmethod
+    def setUpClass(self):
+        targetdir = os.path.join(self.tc.sdk_dir, "guessing-game")
+        try:
+            shutil.rmtree(targetdir)
+        except FileNotFoundError:
+            pass
+        shutil.copytree(
+            os.path.join(self.tc.files_dir, "maturin/guessing-game"), targetdir
+        )
+
+    def setUp(self):
+        machine = self.td.get("MACHINE")
+        if not (
+            self.tc.hasHostPackage("nativesdk-python3-maturin")
+            or self.tc.hasHostPackage("python3-maturin-native")
+        ):
+            raise unittest.SkipTest("No python3-maturin package in the SDK")
+        if not (
+            self.tc.hasHostPackage("packagegroup-rust-cross-canadian-%s" % machine)
+        ):
+            raise unittest.SkipTest(
+                "Testing 'maturin develop' requires Rust cross-canadian in the SDK"
+            )
+
+    def test_maturin_develop(self):
+        """
+        This test case requires:
+          (1) that a .venv can been created.
+          (2) a functional 'rustc' and 'cargo'
+        """
+        self._run("cd %s/guessing-game; python3 -m venv .venv" % self.tc.sdk_dir)
+        cmd = "cd %s/guessing-game; maturin develop" % self.tc.sdk_dir
+        output = self._run(cmd)
+        self.assertRegex(output, r"🔗 Found pyo3 bindings with abi3 support for Python ≥ 3.8")
+        self.assertRegex(output, r"🐍 Not using a specific python interpreter")
+        self.assertRegex(output, r"📡 Using build options features from pyproject.toml")
+        self.assertRegex(output, r"Compiling guessing-game v0.1.0")
+        self.assertRegex(output, r"📦 Built wheel for abi3 Python ≥ 3.8")
+        self.assertRegex(output, r"🛠 Installed guessing-game-0.1.0")