Remove py03 dependency from standalone binary package

Author: posborne

crates/fastly-compute-py/Cargo.toml

@@ -12,8 +12,8 @@ path = "src/main.rs"
 
 [features]
 default = ["extension-module"]
-extension-module = ["pyo3/extension-module"]
-binary = ["pyo3/auto-initialize"]
+extension-module = ["pyo3/extension-module", "pyo3"]
+binary = []  # Binary feature doesn't need pyo3
 
 [dependencies]
 clap = { version = "4", features = ["derive"] }
@@ -26,7 +26,7 @@ wit-component = "0.244"
 tempfile = "3"
 componentize-py = { git = "https://github.com/bytecodealliance/componentize-py" }
 futures = { version = "0.3", default-features = false, features = ["executor"] }
-pyo3 = { version = "0.27.2" }
+pyo3 = { version = "0.27.2", optional = true }
 serde = { version = "1.0", features = ["derive"] }
 toml = "0.8"
 log = "0.4"

crates/fastly-compute-py/src/lib.rs

@@ -1,5 +1,4 @@
 use anyhow::{Context, Result};
-use clap::Parser;
 use indexmap::IndexMap;
 use std::collections::HashMap;
 use std::env;
@@ -17,6 +16,11 @@ pub mod config;
 pub mod site_packages;
 
 use cli::Cli;
+
+#[cfg(feature = "pyo3")]
+use clap::Parser;
+
+#[cfg(feature = "pyo3")]
 use pyo3::prelude::*;
 
 use crate::config::ConfigBuilder;
@@ -96,6 +100,8 @@ pub fn run_main(cli: &Cli) -> Result<()> {
     Ok(())
 }
 
+// Python bindings - only compiled when building the Python extension module
+#[cfg(feature = "pyo3")]
 #[pyfunction]
 fn run_main_py(args: Vec<String>) -> PyResult<()> {
     let cli = Cli::parse_from(args);
@@ -105,6 +111,7 @@ fn run_main_py(args: Vec<String>) -> PyResult<()> {
     })
 }
 
+#[cfg(feature = "pyo3")]
 #[pymodule]
 fn _fastly_compute_py(_py: Python, m: &Bound<'_, PyModule>) -> PyResult<()> {
     m.add_function(wrap_pyfunction!(run_main_py, m)?)?;