feat: make services-gdrive compile for wasm target (#3808)

.github/workflows/ci.yml

@@ -293,7 +293,7 @@ jobs:
           )
           cargo build --features "${FEATURES[*]}"
 
-  # We only support s3 services for now, but we will extend wasm support for other services.
+  # We only support some services(see `available_services` below) for now, but we will extend wasm support for other services.
   build_under_wasm:
     runs-on: ubuntu-latest
     steps:
@@ -306,6 +306,7 @@ jobs:
         run: |
           available_services=(
             services-azblob
+            services-gdrive
             services-s3
           )
           IFS=","

core/src/services/gdrive/backend.rs

@@ -39,7 +39,8 @@ pub struct GdriveBackend {
     pub core: Arc<GdriveCore>,
 }
 
-#[async_trait]
+#[cfg_attr(not(target_arch = "wasm32"), async_trait)]
+#[cfg_attr(target_arch = "wasm32", async_trait(?Send))]
 impl Accessor for GdriveBackend {
     type Reader = IncomingAsyncBody;
     type BlockingReader = ();

core/src/services/gdrive/lister.rs

@@ -37,7 +37,8 @@ impl GdriveLister {
     }
 }
 
-#[async_trait]
+#[cfg_attr(not(target_arch = "wasm32"), async_trait)]
+#[cfg_attr(target_arch = "wasm32", async_trait(?Send))]
 impl oio::PageList for GdriveLister {
     async fn next_page(&self, ctx: &mut oio::PageContext) -> Result<()> {
         let file_id = self.core.get_file_id_by_path(&self.path).await?;

core/src/services/gdrive/writer.rs

@@ -87,7 +87,8 @@ impl GdriveWriter {
     }
 }
 
-#[async_trait]
+#[cfg_attr(not(target_arch = "wasm32"), async_trait)]
+#[cfg_attr(target_arch = "wasm32", async_trait(?Send))]
 impl oio::OneShotWrite for GdriveWriter {
     async fn write_once(&self, bs: &dyn WriteBuf) -> Result<()> {
         let bs = bs.bytes(bs.remaining());