Fixes name conflict in swift generated code (#5181)

* Fixes name conflict in swift generated code

* Adds changelog

CHANGES_UNRELEASED.md

@@ -19,6 +19,10 @@ Use the template below to make assigning a version number during the release cut
 
 -->
 
+## General
+### What's fixed
+- Fixed a bug released in 94.3.1. The bug broke firefox-ios builds due to a name conflict. ([#5181](https://github.com/mozilla/application-services/pull/5181))
+
 ## Nimbus ⛅️🔬🔭
 
 ### What's Changed

components/tabs/android/src/main/java/mozilla/appservices/tabs/Guid.kt

@@ -0,0 +1,11 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+@file:Suppress("InvalidPackageDeclaration")
+package mozilla.appservices.remotetabs
+
+// We needed to rename the Rust `TabsGuid` struct to `Guid` in order to circumvent the naming conflict in
+// iOS with the Guid exposed in `places.udl`. But that creates a breaking change for the Android code. So we are aliasing
+// `TabsGuid` back to `Guid` to prevent a breaking change.
+typealias Guid = TabsGuid

components/tabs/src/lib.rs

@@ -15,12 +15,12 @@ mod sync;
 uniffi_macros::include_scaffolding!("tabs");
 
 // Our UDL uses a `Guid` type.
-use sync_guid::Guid;
-impl UniffiCustomTypeConverter for Guid {
+use sync_guid::Guid as TabsGuid;
+impl UniffiCustomTypeConverter for TabsGuid {
     type Builtin = String;
 
-    fn into_custom(val: Self::Builtin) -> uniffi::Result<Guid> {
-        Ok(Guid::new(val.as_str()))
+    fn into_custom(val: Self::Builtin) -> uniffi::Result<TabsGuid> {
+        Ok(TabsGuid::new(val.as_str()))
     }
 
     fn from_custom(obj: Self) -> Self::Builtin {

components/tabs/src/tabs.udl

@@ -1,5 +1,5 @@
 [Custom]
-typedef string Guid;
+typedef string TabsGuid;
 
 namespace tabs {
 
@@ -95,7 +95,7 @@ interface TabsBridgedEngine {
     sequence<string> apply();
 
     [Throws=TabsError]
-    void set_uploaded(i64 new_timestamp, sequence<Guid> uploaded_ids);
+    void set_uploaded(i64 new_timestamp, sequence<TabsGuid> uploaded_ids);
 
     [Throws=TabsError]
     void sync_finished();