fix: resources after empty directory not copied (#15388)

* fix: resources after empty directory not copied

* typo

* Add empty directory test

Author: Legend-Master

.changes/resources-after-empty-diretory.md

@@ -0,0 +1,18 @@
+---
+"tauri-utils": "patch:bug"
+---
+
+Fix a regression in tauri-utils 2.8.3 that made an empty directory makes it skip all the following entries, e.g.
+
+```json
+{
+  "bundle": {
+    "resources": [
+      "empty-directory",
+      "README.md"
+    ]
+  }
+}
+```
+
+if `empty-directory` is empty, the `README.md` will not be copied to the resource directory (skipped)

crates/tauri-utils/src/resources.rs

@@ -221,6 +221,7 @@ impl ResourcePathsIter<'_> {
 
   fn next_pattern(&mut self) -> Option<crate::Result<Resource>> {
     self.current_dest = None;
+    self.current_iter = None;
 
     let pattern = match &mut self.pattern_iter {
       PatternIter::Slice(iter) => iter.next()?,
@@ -237,10 +238,10 @@ impl ResourcePathsIter<'_> {
         Err(error) => return Some(Err(error.into())),
       };
       match self.next_current_iter() {
-        Some(r) => return Some(r),
+        Some(r) => Some(r),
         None => {
           self.current_iter = None;
-          return Some(Err(crate::Error::GlobPathNotFound(pattern.clone())));
+          Some(Err(crate::Error::GlobPathNotFound(pattern.clone())))
         }
       }
     } else {
@@ -257,12 +258,12 @@ impl ResourcePathsIter<'_> {
             None
           },
         });
+        // If the directory is empty, skip and continue to the next pattern
+        self.next_current_iter().or_else(|| self.next_pattern())
       } else {
-        return Some(self.resource_from_path(path));
+        Some(self.resource_from_path(path))
       }
     }
-
-    self.next_current_iter()
   }
 }
 
@@ -358,6 +359,7 @@ mod tests {
       fs::create_dir_all(path.parent().unwrap()).unwrap();
       fs::write(path, "").unwrap();
     }
+    fs::create_dir_all("empty-directory").unwrap();
   }
 
   fn resources_map(literal: &[(&str, &str)]) -> HashMap<String, String> {
@@ -377,6 +379,8 @@ mod tests {
 
     let resources = ResourcePaths::new(
       &[
+        // `empty-directory` should not affect anything
+        "../empty-directory".into(),
         "../src/script.js".into(),
         "../src/assets".into(),
         "../src/index.html".into(),