write extra_files when building pyembed artifacts?

pyoxidizer/src/project_building.rs

@@ -484,6 +484,10 @@ pub fn build_pyembed_artifacts(
         ))? {
             let p = p?;
 
+            // leave the extra files in the build dir; we do not need them to build the binary
+            if p.file_name() == "extra_files" {
+                continue;
+            }
             let dest_path = artifacts_path.join(p.file_name());
             std::fs::copy(&p.path(), &dest_path).context(format!(
                 "copying {} to {}",

pyoxidizer/src/py_packaging/binary.rs

@@ -746,6 +746,13 @@ impl<'a> EmbeddedPythonContext<'a> {
         Ok(())
     }
 
+    /// Write extra files like dynamic extension modules to the build folder.
+    pub fn write_extra_files(&self, dest_dir: impl AsRef<Path>) -> Result<()> {
+        self.extra_files
+            .materialize_files(dest_dir.as_ref().join("extra_files"))?;
+        Ok(())
+    }
+
     /// Write out files needed to build a binary against our configuration.
     pub fn write_files(&self, dest_dir: &Path) -> Result<()> {
         self.write_packed_resources(&dest_dir)
@@ -756,6 +763,8 @@ impl<'a> EmbeddedPythonContext<'a> {
             .context("write_interpreter_config_rs()")?;
         self.write_pyo3_config(&dest_dir)
             .context("write_pyo3_config()")?;
+        self.write_extra_files(&dest_dir)
+            .context("write_extra_files()")?;
 
         Ok(())
     }