feat: do not generate any types for substreams (#1327)

* feat: do not generate any types for substreams

* m

* update success message

Author: saihaj

.changeset/curvy-panthers-wink.md

@@ -0,0 +1,5 @@
+---
+'@graphprotocol/graph-cli': minor
+---
+
+do not generate types, instead show a message to user to use substreams CLI for codegen.

packages/cli/src/type-generator.ts

@@ -51,6 +51,13 @@ export default class TypeGenerator {
   }
 
   async generateTypes() {
+    if (this.protocol.name === 'substreams') {
+      toolbox.print.success(
+        'Subgraph uses a substream datasource. Codegeneration is not required.',
+      );
+      return;
+    }
+
     try {
       if (!this.options.skipMigrations && this.options.subgraphManifest) {
         await applyMigrations({