fix: Noarch python packages not installable (#6)

src/lib.rs

@@ -1,5 +1,5 @@
 use anyhow::Result;
-use rattler::install::{link_package, InstallDriver, InstallOptions};
+use rattler::install::{link_package, InstallDriver, InstallOptions, PythonInfo};
 use rattler_conda_types::{prefix_record::PathsEntry, PackageRecord, PrefixRecord, RepoDataRecord};
 use rattler_package_streaming::fs::extract;
 use std::{
@@ -123,7 +123,24 @@ pub async fn pixi_inject(target_prefix: PathBuf, packages: Vec<PathBuf>) -> Resu
     );
 
     let driver = InstallDriver::default();
-    let options = InstallOptions::default();
+    let python_info = if installed_package_names.contains("python") {
+        Some(PythonInfo::from_python_record(
+            &installed_packages
+                .iter()
+                .find(|&p| p.repodata_record.package_record.name.as_normalized() == "python")
+                .context("Could not find python package in installed packages")?
+                .repodata_record
+                .package_record
+                .clone(),
+            Platform::current(),
+        )?)
+    } else {
+        None
+    };
+    let options = InstallOptions {
+        python_info,
+        ..Default::default()
+    };
 
     for (path, package_record) in injected_packages.iter() {
         let repodata_record = RepoDataRecord {

tests/integration_test.rs

@@ -75,6 +75,31 @@ fn required_fs_objects() -> Vec<&'static str> {
     ]
 }
 
+#[rstest]
+#[tokio::test]
+async fn test_noarch_python(options: Options) {
+    pixi_inject::pixi_inject(
+        options.prefix.clone(),
+        vec!["tests/resources/packages/setuptools-75.6.0-pyhff2d567_1.conda".into()],
+    )
+    .await
+    .unwrap();
+
+    #[cfg(not(unix))]
+    let required_fs_objects = vec![
+        "Lib\\site-packages\\setuptools\\__init__.py",
+        "Lib\\site-packages\\pkg_resources\\__init__.py",
+    ];
+    #[cfg(unix)]
+    let required_fs_objects = vec![
+        "lib/python3.13/site-packages/setuptools/__init__.py",
+        "lib/python3.13/site-packages/pkg_resources/__init__.py",
+    ];
+    for fs_object in required_fs_objects {
+        assert!(options.prefix.join(fs_object).exists());
+    }
+}
+
 #[rstest]
 #[tokio::test]
 async fn test_simple_example(options: Options, required_fs_objects: Vec<&'static str>) {