pretty good progress

src/googlebigquery.rs

@@ -0,0 +1,33 @@
+use std::error::Error;
+
+use google_bigquery2::{hyper, hyper_rustls, oauth2, Bigquery};
+// use google_bigquery2::api::QueryRequest;
+use google_bigquery2::hyper::client::HttpConnector;
+use google_bigquery2::hyper_rustls::HttpsConnector;
+
+pub async fn get_client<S: Into<String>>(
+    service_account_path: Option<S>,
+) -> Result<Bigquery<HttpsConnector<HttpConnector>>, Box<dyn Error>> {
+    let hyper_client = hyper::Client::builder().build(
+        hyper_rustls::HttpsConnectorBuilder::new()
+            .with_native_roots()
+            .https_or_http()
+            .enable_http1()
+            .enable_http2()
+            .build(),
+    );
+    let service_account_path = match service_account_path {
+        None => "auth/service_account2.json".to_string(),
+        Some(s) => s.into(),
+    };
+    let secret = oauth2::read_service_account_key(service_account_path)
+        .await
+        .unwrap();
+    let auth = oauth2::ServiceAccountAuthenticator::builder(secret)
+        .build()
+        .await
+        .unwrap();
+    let client: Bigquery<HttpsConnector<HttpConnector>> = Bigquery::new(hyper_client, auth);
+
+    Ok(client)
+}