Exclude generated folders from the GenerateCodegenSchemaTask

Summary:
I'm adding a series of excludes to the `GenerateCodegenSchemaTaskTest`.
The reason is that RN Tester is setting `packages/rn-tester` as the root of the
specs as they're not isolated.

This is causing the Gradle task to crawl inside the `android/app/build` folder
where we store sourcemaps and other files that have .js files. As those files
gets updated when you build, the codegen task gets invalidated over and over
and Gradle is firing warning about it.

Changelog:
[Internal] [Changed] - Exclude generated folders from the GenerateCodegenSchemaTask

Reviewed By: cipolleschi

Differential Revision: D40098418

fbshipit-source-id: fcffbc73e8258c4e9eefda062e1fad77be650002

packages/react-native-gradle-plugin/src/main/kotlin/com/facebook/react/tasks/GenerateCodegenSchemaTask.kt

@@ -34,7 +34,14 @@ abstract class GenerateCodegenSchemaTask : Exec() {
       project.fileTree(jsRootDir) {
         it.include("**/*.js")
         it.include("**/*.ts")
+        // Those are known build paths where the source map or other
+        // .js files could be stored/generated. We want to make sure we don't pick them up
+        // for execution avoidance.
         it.exclude("**/generated/source/codegen/**/*")
+        it.exclude("**/build/generated/assets/react/**/*")
+        it.exclude("**/build/generated/res/react/**/*")
+        it.exclude("**/build/generated/sourcemaps/react/**/*")
+        it.exclude("**/build/intermediates/sourcemaps/react/**/*")
       }
 
   @get:OutputFile

packages/react-native-gradle-plugin/src/test/kotlin/com/facebook/react/tasks/GenerateCodegenSchemaTaskTest.kt

@@ -41,6 +41,45 @@ class GenerateCodegenSchemaTaskTest {
         setOf(File(jsRootDir, "file.js"), File(jsRootDir, "file.ts")), task.jsInputFiles.files)
   }
 
+  @Test
+  fun generateCodegenSchema_inputFilesInExcludedPath_areExcluded() {
+    fun File.createFileAndPath() {
+      parentFile.mkdirs()
+      createNewFile()
+    }
+
+    val jsRootDir =
+        tempFolder.newFolder("js").apply {
+          File(this, "afolder/includedfile.js").createFileAndPath()
+          // Those files should be excluded due to their filepath
+          File(this, "afolder/generated/source/codegen/anotherfolder/excludedfile.js")
+              .createFileAndPath()
+          File(this, "afolder/build/generated/assets/react/anotherfolder/excludedfile.js")
+              .createFileAndPath()
+          File(this, "afolder/build/generated/res/react/anotherfolder/excludedfile.js")
+              .createFileAndPath()
+          File(this, "afolder/build/generated/sourcemaps/react/anotherfolder/excludedfile.js")
+              .createFileAndPath()
+          File(this, "afolder/build/intermediates/sourcemaps/react/anotherfolder/excludedfile.js")
+              .createFileAndPath()
+        }
+
+    val task = createTestTask<GenerateCodegenSchemaTask> { it.jsRootDir.set(jsRootDir) }
+
+    assertEquals(jsRootDir, task.jsInputFiles.dir)
+    assertEquals(
+        setOf(
+            "**/generated/source/codegen/**/*",
+            "**/build/generated/assets/react/**/*",
+            "**/build/generated/res/react/**/*",
+            "**/build/generated/sourcemaps/react/**/*",
+            "**/build/intermediates/sourcemaps/react/**/*",
+        ),
+        task.jsInputFiles.excludes)
+    assertEquals(1, task.jsInputFiles.files.size)
+    assertEquals(setOf(File(jsRootDir, "afolder/includedfile.js")), task.jsInputFiles.files)
+  }
+
   @Test
   fun generateCodegenSchema_outputFile_isSetCorrectly() {
     val outputDir = tempFolder.newFolder("output")