Refcount entries in snapshot context, moving towards sharing

src/common_setup.rs

@@ -1,7 +1,7 @@
 //! Initialization routines that are used by more than one Rojo command or
 //! utility.
 
-use std::path::Path;
+use std::{path::Path, sync::Arc};
 
 use rbx_dom_weak::RbxInstanceProperties;
 
@@ -41,7 +41,8 @@ pub fn start<F: VfsFetcher>(
         // If the project file defines no plugins, then there's no need to
         // initialize the snapshot plugin context.
         if !project.plugins.is_empty() {
-            snapshot_context.plugin_context = Some(SnapshotPluginContext::new(&project.plugins));
+            snapshot_context.plugin_context =
+                Some(Arc::new(SnapshotPluginContext::new(&project.plugins)));
         }
     }
 

src/snapshot_middleware/context.rs

@@ -1,16 +1,16 @@
-use std::{fmt, fs, ops::Deref, path::Path};
+use std::{fmt, fs, ops::Deref, path::Path, sync::Arc};
 
 use rlua::{Lua, RegistryKey};
 
 use super::error::SnapshotError;
 
-#[derive(Debug)]
+#[derive(Debug, Clone)]
 pub struct InstanceSnapshotContext {
     /// Holds all the state needed to run user plugins as part of the snapshot
     /// process.
     ///
     /// If this is None, then plugins should not be evaluated at all.
-    pub plugin_context: Option<SnapshotPluginContext>,
+    pub plugin_context: Option<Arc<SnapshotPluginContext>>,
 }
 
 impl Default for InstanceSnapshotContext {