add cargo-generate template for plugin example

examples/plugin/.template/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+authors = ["{{authors}}"]
+name = "{{project-name}}"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+pyo3 = "{{PYO3_VERSION}}"
+plugin_api = { path = "plugin_api" }

examples/plugin/.template/plugin_api/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "plugin_api"
+version = "0.1.0"
+description = "Plugin API example"
+edition = "2021"
+
+[lib]
+name = "plugin_api"
+crate-type = ["cdylib", "rlib"]
+
+[dependencies]
+#!!! Important - DO NOT ENABLE extension-module FEATURE HERE!!!
+pyo3 = "{{PYO3_VERSION}}"
+
+[features]
+# instead extension-module feature for pyo3 is enabled conditionally when we want to build a standalone extension module to test our plugins without "main" program
+extension-module = ["pyo3/extension-module"]

examples/plugin/.template/pre-script.rhai

@@ -0,0 +1,4 @@
+variable::set("PYO3_VERSION", "0.18.0");
+file::rename(".template/Cargo.toml", "Cargo.toml");
+file::rename(".template/plugin_api/Cargo.toml", "plugin_api/Cargo.toml");
+file::delete(".template");

examples/plugin/cargo-generate.toml

@@ -0,0 +1,5 @@
+[template]
+ignore = [".nox"]
+
+[hooks]
+pre = [".template/pre-script.rhai"]