allow lua_init files to be referenced in $path

rojo-test/build-test-snapshots/end_to_end__tests__build__init_from_path.snap

@@ -0,0 +1,18 @@
+---
+source: tests/tests/build.rs
+expression: contents
+---
+<roblox version="4">
+  <Item class="Folder" referent="0">
+    <Properties>
+      <string name="Name">init_from_path</string>
+    </Properties>
+    <Item class="ModuleScript" referent="1">
+      <Properties>
+        <string name="Name">folder</string>
+        <string name="Source"><![CDATA[-- init.luau
+]]></string>
+      </Properties>
+    </Item>
+  </Item>
+</roblox>

src/snapshot_middleware/dir.rs

@@ -51,7 +51,7 @@ pub fn snapshot_dir_no_meta(
     for entry in vfs.read_dir(path)? {
         let entry = entry?;
 
-        if !passes_filter_rules(&entry) {
+        if !passes_filter_rules(&entry) || is_init_file(entry.path()).unwrap() {
             continue;
         }
 
@@ -221,6 +221,21 @@ pub fn syncback_dir_no_meta<'sync>(
     })
 }
 
+fn is_init_file(path: &Path) -> anyhow::Result<bool> {
+    let file_name = path
+        .file_name()
+        .and_then(|n| n.to_str())
+        .with_context(|| format!("file name of {} is invalid", path.display()))?;
+
+    match file_name {
+        "init.server.luau" | "init.server.lua" | "init.client.luau" | "init.client.lua"
+        | "init.plugin.luau" | "init.plugin.lua" | "init.luau" | "init.lua" | "init.csv" => {
+            Ok(true)
+        }
+        _ => Ok(false),
+    }
+}
+
 #[cfg(test)]
 mod test {
     use super::*;

src/snapshot_middleware/mod.rs

@@ -72,32 +72,18 @@ pub fn snapshot_from_vfs(
         None => return Ok(None),
     };
 
-    if meta.is_dir() {
+    if !meta.is_dir() {
-        let (middleware, dir_name, init_path) = get_dir_middleware(vfs, path)?;
+        return snapshot_from_path(context, vfs, path);
-        // TODO: Support user defined init paths
+    }
-        // If and when we do, make sure to go support it in
-        // `Project::set_file_name`, as right now it special-cases
-        // `default.project.json` as an `init` path.
-        match middleware {
-            Middleware::Dir => middleware.snapshot(context, vfs, path, dir_name),
-            _ => middleware.snapshot(context, vfs, &init_path, dir_name),
-        }
-    } else {
-        let file_name = path
-            .file_name()
-            .and_then(|n| n.to_str())
-            .with_context(|| format!("file name of {} is invalid", path.display()))?;
 
-        // TODO: Is this even necessary anymore?
+    let (middleware, dir_name, init_path) = get_dir_middleware(vfs, path)?;
-        match file_name {
+    // TODO: Support user defined init paths
-            "init.server.luau" | "init.server.lua" | "init.client.luau" | "init.client.lua"
+    // If and when we do, make sure to go support it in
-            | "init.plugin.luau" | "init.plugin.lua" | "init.luau" | "init.lua" | "init.csv" => {
+    // `Project::set_file_name`, as right now it special-cases
-                return Ok(None)
+    // `default.project.json` as an `init` path.
-            }
+    match middleware {
-            _ => {}
+        Middleware::Dir => middleware.snapshot(context, vfs, path, dir_name),
-        }
+        _ => middleware.snapshot(context, vfs, &init_path, dir_name),
-
-        snapshot_from_path(context, vfs, path)
     }
 }