Adjust Flying Shuttle message (#7522)

* Adjust Flying Shuttle message
This adjusts the flying shuttle message for when a shuttle is not found or cannot be reused to reduce confusion to the user opting into the feature.

* Tweak message

packages/next/build/flying-shuttle.ts

@@ -200,8 +200,6 @@ export class FlyingShuttle {
 
     if (found) {
       Log.info('flying shuttle is docked')
-    } else {
-      Log.info('could not locate flying shuttle')
     }
 
     return found
@@ -298,7 +296,9 @@ export class FlyingShuttle {
       const c = pageNames.length - u
       Log.info(`found ${c} changed and ${u} unchanged page${u > 1 ? 's' : ''}`)
     } else {
-      Log.warn(`flying shuttle had no pages we can reuse`)
+      Log.warn(
+        `flying shuttle is going to perform a full rebuild due to changes across all pages`
+      )
     }
 
     return unchangedPages

test/integration/flying-shuttle/test/index.test.js

@@ -29,7 +29,7 @@ describe('Flying Shuttle', () => {
         stdout: true
       })
       const buildText = stripAnsi(stdout)
-      expect(buildText).toMatch(/could not locate flying shuttle/)
+      expect(buildText).not.toMatch(/flying shuttle is docked/)
       await fs.copy(
         path.join(appDir, '.next'),
         path.join(appDir, '.next-first')