fix(ecstore): gate Linux-only commit helpers

Co-Authored-By: heihutu <heihutu@gmail.com>
Co-Authored-By: zhi22915 <qiuzgang@gmail.com>

crates/ecstore/src/disk/local.rs

@@ -3012,7 +3012,7 @@ fn should_fail_local_inline_rollback_hardlink(dst_path: &Path) -> bool {
         .remove(dst_path)
 }
 
-#[cfg(test)]
+#[cfg(all(test, target_os = "linux"))]
 pub(super) fn remove_dst_base_before_commit_std(
     dst_path: &str,
     guard: os::RenameCommitGuard,
@@ -3290,7 +3290,7 @@ fn should_fail_local_inline_rollback_hardlink(_dst_path: &Path) -> bool {
     false
 }
 
-#[cfg(not(test))]
+#[cfg(all(not(test), target_os = "linux"))]
 pub(super) fn remove_dst_base_before_commit_std(
     _dst_path: &str,
     guard: os::RenameCommitGuard,

crates/ecstore/src/disk/local/multipart_source_state.rs

@@ -1936,6 +1936,7 @@ impl NativeMultipartPublication {
         *self.validated_prepared.lock() = Some(validated);
         Ok(())
     }
+    #[cfg(target_os = "linux")]
     pub(super) fn prepare_and_install_head_on_thread(
         &self,
         new_metadata: &[u8],