emit must be called on build program to leverage caching

vercel · May 11, 2021 · c3cec49 · c3cec49
1 parent 2f142b6
commit c3cec49
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/packages/next/lib/typescript/runTypeCheck.ts b/packages/next/lib/typescript/runTypeCheck.ts
@@ -44,6 +44,7 @@ export async function runTypeCheck(
   }
 
   let program: import('typescript').Program
+  let result: import('typescript').EmitResult
   let incremental = false
   if (options.incremental && cacheDir) {
     incremental = true
@@ -55,11 +56,12 @@ export async function runTypeCheck(
         tsBuildInfoFile: path.join(cacheDir, '.tsbuildinfo'),
       },
     })
+    result = builderProgram.emit()
     program = builderProgram.getProgram()
   } else {
     program = ts.createProgram(effectiveConfiguration.fileNames, options)
+    result = program.emit()
   }
-  const result = program.emit()
 
   // Intended to match:
   // - pages/test.js