Add hello-world-script example for testing console_scripts

Author: messense

examples/hello-world-script/Cargo.lock

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+[package]
+name = "hello-world-script"
+version = "0.1.0"
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+
+[profile.release-lto]
+inherits = "release"
+lto = true

examples/hello-world-script/Cargo.toml

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+include Cargo.toml
+recursive-include src *

examples/hello-world-script/MANIFEST.in

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+from os.path import dirname
+
+import nox
+
+SETUPTOOLS_RUST = dirname(dirname(dirname(__file__)))
+
+
+@nox.session()
+def test(session: nox.Session):
+    session.install(SETUPTOOLS_RUST)
+    session.install("--no-build-isolation", ".")
+    session.run("hello-world-script", *session.posargs)
+
+
+@nox.session()
+def setuptools_install(session: nox.Session):
+    session.install("setuptools")
+    with session.chdir(SETUPTOOLS_RUST):
+        session.run("python", "setup.py", "install")
+    session.run("python", "setup.py", "install")
+    session.run("hello-world-script", *session.posargs)

examples/hello-world-script/hello_world/__init__.py

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+[build-system]
+requires = ["setuptools", "wheel", "setuptools-rust"]

examples/hello-world-script/noxfile.py

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+from setuptools import setup
+
+from setuptools_rust import RustExtension, Binding
+
+setup(
+    name="hello-world-script",
+    version="1.0",
+    rust_extensions=[
+        RustExtension(
+            {"hello-world-script": "hello_world.hello-world-script"},
+            binding=Binding.Exec,
+            script=True,
+            args=["--profile", "release-lto"],
+        )
+    ],
+    # rust extensions are not zip safe, just like C-extensions.
+    zip_safe=False,
+)

examples/hello-world-script/pyproject.toml

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+fn main() {
+    println!("Hello, world!");
+}