Squashed commit of the following:

commit 0b5c1d0d2d8568e7e7e5cdab46690f9ccf4eaad1
Merge: 4d2ebc4 49a5eca
Author: Simen Bekkhus <sbekkhus91@gmail.com>
Date:   Tue Apr 19 15:03:01 2022 +0200

    Merge branch 'main' into multiprj-babel

commit 4d2ebc4
Author: Bradford Lemley <bradfordlemley@gmail.com>
Date:   Mon Feb 4 10:29:31 2019 -0700

    Add tests for a few other babel config methods

commit 4070442
Author: Bradford Lemley <bradfordlemley@gmail.com>
Date:   Mon Feb 4 08:14:39 2019 -0700

    Apply patch from jestjs#7794 (comment).

commit 51d008c
Author: Bradford Lemley <bradfordlemley@gmail.com>
Date:   Sun Feb 3 11:03:28 2019 -0700

    Configure babel cwd to be project rootDir

commit 0dc6df1
Author: Bradford Lemley <bradfordlemley@gmail.com>
Date:   Sun Feb 3 15:08:05 2019 -0700

    Add test demonstrating babel behavior difference individually vs. multiprj

e2e/__tests__/multiProjectRunner.test.ts

@@ -572,3 +572,41 @@ describe("doesn't bleed module file extensions resolution with multiple workers"
     expect(stderr).toMatch('PASS project2/__tests__/project2.test.js');
   });
 });
+
+describe('Babel config in individual project works in multi-project', () => {
+  it('Prj-1 works individually', () => {
+    const result = runJest('multi-project-babel/prj-1');
+    expect(result.stderr).toMatch('PASS ./index.test.js');
+    expect(result.exitCode).toBe(0);
+  });
+  it('Prj-2 works individually', () => {
+    const result = runJest('multi-project-babel/prj-2');
+    expect(result.stderr).toMatch('PASS ./index.test.js');
+    expect(result.exitCode).toBe(0);
+  });
+  it('Prj-3 works individually', () => {
+    const result = runJest('multi-project-babel/prj-3');
+    expect(result.stderr).toMatch('PASS src/index.test.js');
+    expect(result.exitCode).toBe(0);
+  });
+  it('Prj-4 works individually', () => {
+    const result = runJest('multi-project-babel/prj-4');
+    expect(result.stderr).toMatch('PASS src/index.test.js');
+    expect(result.exitCode).toBe(0);
+  });
+  it('Prj-5 works individually', () => {
+    const result = runJest('multi-project-babel/prj-5');
+    expect(result.stderr).toMatch('PASS src/index.test.js');
+    expect(result.exitCode).toBe(0);
+  });
+  it('All project work when running from multiproject', () => {
+    const result = runJest('multi-project-babel');
+    expect(result.stderr).toMatch('PASS prj-1/index.test.js');
+    expect(result.stderr).toMatch('PASS prj-2/index.test.js');
+    expect(result.stderr).toMatch('PASS prj-3/src/index.test.js');
+    expect(result.stderr).toMatch('PASS prj-4/src/index.test.js');
+    expect(result.stderr).toMatch('PASS prj-5/src/index.test.js');
+    expect(result.stderr).toMatch('PASS prj-3/src/index.test.js');
+    expect(result.exitCode).toBe(0);
+  });
+});

e2e/multi-project-babel/package.json

@@ -0,0 +1,15 @@
+{
+  "jest": {
+    "projects": [
+      {
+        "rootDir": "<rootDir>/prj-1"
+      },
+      {
+        "rootDir": "<rootDir>/prj-2"
+      },
+      "<rootDir>/prj-3",
+      "<rootDir>/prj-4",
+      "<rootDir>/prj-5"
+    ]
+  }
+}

e2e/multi-project-babel/prj-1/babel.config.js

@@ -0,0 +1,10 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+module.exports = {
+  presets: ['@babel/preset-flow'],
+};

e2e/multi-project-babel/prj-1/index.js

@@ -0,0 +1,8 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+module.exports = (text: string) => text;

e2e/multi-project-babel/prj-1/index.test.js

@@ -0,0 +1,12 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+const f = require('./');
+
+it('Transpiles', () => {
+  expect(f('test')).toBe('test');
+});

e2e/multi-project-babel/prj-1/package.json

@@ -0,0 +1 @@
+{}

e2e/multi-project-babel/prj-2/.babelrc.js

@@ -0,0 +1,10 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+module.exports = {
+  presets: ['@babel/preset-flow'],
+};

e2e/multi-project-babel/prj-2/index.js

@@ -0,0 +1,8 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+module.exports = (text: string) => text;

e2e/multi-project-babel/prj-2/index.test.js

@@ -0,0 +1,12 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+const f = require('./');
+
+it('Transpiles', () => {
+  expect(f('test')).toBe('test');
+});

e2e/multi-project-babel/prj-2/package.json

@@ -0,0 +1 @@
+{}

e2e/multi-project-babel/prj-3/package.json

@@ -0,0 +1,5 @@
+{
+  "jest": {
+    "rootDir": "src"
+  }
+}

e2e/multi-project-babel/prj-3/src/babel.config.js

@@ -0,0 +1,10 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+module.exports = {
+  presets: ['@babel/preset-flow'],
+};

e2e/multi-project-babel/prj-3/src/index.js

@@ -0,0 +1,8 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+module.exports = (text: string) => text;

e2e/multi-project-babel/prj-3/src/index.test.js

@@ -0,0 +1,12 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+const f = require('./');
+
+it('Transpiles', () => {
+  expect(f('test')).toBe('test');
+});

e2e/multi-project-babel/prj-4/.babelrc.js

@@ -0,0 +1,10 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+module.exports = {
+  presets: ['@babel/preset-flow'],
+};

e2e/multi-project-babel/prj-4/package.json

@@ -0,0 +1,5 @@
+{
+  "jest": {
+    "rootDir": "src"
+  }
+}

e2e/multi-project-babel/prj-4/src/index.js

@@ -0,0 +1,8 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+module.exports = (text: string) => text;

e2e/multi-project-babel/prj-4/src/index.test.js

@@ -0,0 +1,12 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+const f = require('./');
+
+it('Transpiles', () => {
+  expect(f('test')).toBe('test');
+});

e2e/multi-project-babel/prj-5/.babelrc.js

@@ -0,0 +1,10 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+module.exports = {
+  presets: ['@babel/preset-flow'],
+};

e2e/multi-project-babel/prj-5/package.json

@@ -0,0 +1,5 @@
+{
+  "jest": {
+    "rootDir": "src"
+  }
+}

e2e/multi-project-babel/prj-5/src/index.js

@@ -0,0 +1,8 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+module.exports = (text: string) => text;

e2e/multi-project-babel/prj-5/src/index.test.js

@@ -0,0 +1,12 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+const f = require('./');
+
+it('Transpiles', () => {
+  expect(f('test')).toBe('test');
+});