Warn on GraphQL parser exceptions (#642)

Fix silent parsing failure When GraphQL `parse` fails to parse a file errors are silently ignored. Was having an issue with a whitespace character in one of our `.graphql` files which was rather difficult to trace.
apollographql · Nov 14, 2018 · 9c9b406 · 9c9b406
1 parent a2029ff
commit 9c9b406
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/packages/apollo-codegen-core/src/loading.ts b/packages/apollo-codegen-core/src/loading.ts
@@ -185,7 +185,11 @@ export function loadQueryDocuments(
     .map(source => {
       try {
         return parse(source!);
-      } catch {
+      } catch (e) {
+        const name = (source && source.name) || "";
+        console.warn(stripIndents`
+        Warning: error parsing GraphQL file ${name}
+        ${e.stack}`);
         return null;
       }
     })