Refactor the Next SSG transform to handle the inverse operation (vercel/turbo#2968)

## The original transform

The original behavior of the Next SSG transform is to remove `getServerSideProps`, `getStaticProps`, and `getStaticPaths` from Next.js page files so they can be bundled for the client. This is what enables the following code to work properly without advanced tree shaking:

```jsx
import db from "db";
import PostCounter from 

export default function Home(props) {
  return <>{props.posts.length} post(s)</>;
}

const postsPromise = db.getPosts();

export async function getStaticProps() {
  return {
    props: {
      posts: await postsPromise,
    },
  };
}
```

The transform is able to remove both `getStaticProps` and all its exclusive, transitive dependencies, so this is what the client would see:

```jsx
import PostCounter from "components/PostCounter";
export var __N_SSG = true;
export default function Home(props) {
    return __jsx(PostCounter, {
        count: props.posts.length
    });
}
```

## Adding the inverse operation

However, to support proper HMR for these data exports, we need to be able to execute somewhat of an inverse operation: remove the default component export, but preserve all the rest. This allows Turbopack to bundle server-side only declarations, only re-rendering when one of these changes, instead of re-rendering on any server-side and client-side change.

From our module above, the updated transform is now also able to generate the following:

```jsx
import db from "db";
const postsPromise = db.getPosts();
export async function getStaticProps() {
    return {
        props: {
            posts: await postsPromise
        }
    };
}
```

As you can see, this module is no longer importing the `PostCounter`, which means re-rendering will not invalidate when that counter changes. However, if the "db" module changes, we will still be able to detect a change and re-render.

## Other notes

* I renamed the transform from "next_ssg" to "next_transform_strip_page_exports". It's much more verbose, but hopefully also much clearer about what it does at a glance.
* I took the liberty to clean up and comment some parts of the transform to make it more easily understandable (at least for someone like me, who hasn't written a lot of SWC code). I also fixed a few bugs and edge cases.
* I brought over the tests from the transform in the Next.js and added a couple of them.
* For now, only the `StripDataExports` filter is used. A future PR will build on this and @ForsakenHarmony's https://github.com/vercel/turbo/pull/2949 PR to actually implement SSR/SSG HMR. 

## Reviewing guide

1. The crux of the change is the move (and refactor) of the next ssg transform from https://github.com/vercel/turbo/pull/2968/files#diff-133d73657647ed793ca4782a73552650b32ad565094b1e0faf452ad58705499b to https://github.com/vercel/turbo/pull/2968/files#diff-d6442fa6af9b66e581f062739dd6de2419f5e8f6f3d97cfa63518c72b0a9ee3e.
2. I also added the [errors.rs](https://github.com/vercel/turbo/pull/2968/files#diff-0f308375da4179c0ea5a0fcbd99593b56d6020cd7dec1694ed08f392f1637c09) and [fixture.rs](https://github.com/vercel/turbo/pull/2968/files#diff-6e23f34483fc17a27dfc630edb455ea95e28d5cb350468c2ba01384fbc3c116a) tests. I adapted fixture.rs to execute on the two transform filters: data exports and default export.
3. Most of the tests in `tests/` are copied from https://github.com/vercel/next.js/tree/canary/packages/next-swc/crates/core/tests. The changes I made are:
  i. https://github.com/vercel/turbo/pull/2968/files#diff-774abee6a1bf139c9ce55e226bf15b52e56ea091170ee5d6295c191fd8d793c7: made this one symmetric for both strip data and strip default transforms.
  ii. https://github.com/vercel/turbo/pull/2968/files#diff-4792266a264dc67da93748d2c6522917f860527a689891bd5f8f4add9841e7f6 wasn't supported before AFAIK.
  iii. https://github.com/vercel/turbo/pull/2968/files#diff-a3b12adbce1dec40f39ff8af13ffecbe7f6963e21bc402cef6332ecf5018877e similar to i.

packages/next-swc/crates/next-core/src/next_client/context.rs

@@ -157,7 +157,9 @@ pub async fn add_next_transforms_to_pages(
             ]),
         ]),
         vec![ModuleRuleEffect::AddEcmascriptTransforms(
-            EcmascriptInputTransformsVc::cell(vec![EcmascriptInputTransform::NextJsPageSsr]),
+            EcmascriptInputTransformsVc::cell(vec![
+                EcmascriptInputTransform::NextJsStripPageDataExports,
+            ]),
         )],
     ));
     Ok(module_options_context.cell())

packages/next-swc/crates/next-transform-strip-page-exports/Cargo.toml

@@ -0,0 +1,38 @@
+[package]
+name = "next-transform-strip-page-exports"
+version = "0.1.0"
+description = "SWC transform to selectively strip Next.js page data or default exports"
+license = "MPL-2.0"
+edition = "2021"
+autobenches = false
+
+[lib]
+bench = false
+
+[dependencies]
+fxhash = "0.2.1"
+tracing = "0.1.37"
+
+swc_core = { workspace = true, features = [
+  "ecma_ast",
+  "common",
+  "common_concurrent",
+  "common_sourcemap",
+  "ecma_codegen",
+  "ecma_parser",
+  "ecma_preset_env",
+  "ecma_transforms",
+  "ecma_transforms_module",
+  "ecma_transforms_react",
+  "ecma_transforms_typescript",
+  "ecma_quote",
+  "ecma_visit",
+  "ecma_visit_path",
+  "ecma_utils",
+  "testing",
+  "base",
+] }
+
+[dev-dependencies]
+swc_core = { workspace = true, features = ["testing_transform"] }
+testing = "0.31.14"

packages/next-swc/crates/next-transform-strip-page-exports/tests/errors.rs

@@ -0,0 +1,32 @@
+use std::path::PathBuf;
+
+use next_transform_strip_page_exports::{next_transform_strip_page_exports, ExportFilter};
+use swc_core::ecma::{
+    parser::{EsConfig, Syntax},
+    transforms::testing::{test_fixture, FixtureTestConfig},
+};
+use testing::fixture;
+
+fn syntax() -> Syntax {
+    Syntax::Es(EsConfig {
+        jsx: true,
+        ..Default::default()
+    })
+}
+
+#[fixture("tests/errors/**/input.js")]
+fn next_transform_strip_page_exports_errors(input: PathBuf) {
+    let output = input.parent().unwrap().join("output.js");
+    test_fixture(
+        syntax(),
+        &|_tr| {
+            next_transform_strip_page_exports(ExportFilter::StripDataExports, Default::default())
+        },
+        &input,
+        &output,
+        FixtureTestConfig {
+            allow_error: true,
+            ..Default::default()
+        },
+    );
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/errors/server-side-after-static-paths/input.js

@@ -0,0 +1,2 @@
+export async function getStaticPaths() {}
+export const getServerSideProps = function getServerSideProps() {};

packages/next-swc/crates/next-transform-strip-page-exports/tests/errors/server-side-after-static-paths/output.stderr

@@ -0,0 +1,7 @@
+
+  x You can not use getStaticProps or getStaticPaths with getServerSideProps. To use SSG, please remove getServerSideProps
+   ,-[input.js:1:1]
+ 1 | export async function getStaticPaths() {}
+ 2 | export const getServerSideProps = function getServerSideProps() {};
+   :              ^^^^^^^^^^^^^^^^^^
+   `----

packages/next-swc/crates/next-transform-strip-page-exports/tests/errors/server-side-after-static-props/input.js

@@ -0,0 +1,2 @@
+export const getStaticProps = async () => {};
+export { a as getServerSideProps };

packages/next-swc/crates/next-transform-strip-page-exports/tests/errors/server-side-after-static-props/output.stderr

@@ -0,0 +1,7 @@
+
+  x You can not use getStaticProps or getStaticPaths with getServerSideProps. To use SSG, please remove getServerSideProps
+   ,-[input.js:1:1]
+ 1 | export const getStaticProps = async () => {};
+ 2 | export { a as getServerSideProps };
+   :               ^^^^^^^^^^^^^^^^^^
+   `----

packages/next-swc/crates/next-transform-strip-page-exports/tests/errors/static-paths-after-server-side/input.js

@@ -0,0 +1,2 @@
+export { a as getServerSideProps } from "./input";
+export { getStaticPaths } from "a";

packages/next-swc/crates/next-transform-strip-page-exports/tests/errors/static-paths-after-server-side/output.stderr

@@ -0,0 +1,7 @@
+
+  x You can not use getStaticProps or getStaticPaths with getServerSideProps. To use SSG, please remove getServerSideProps
+   ,-[input.js:1:1]
+ 1 | export { a as getServerSideProps } from "./input";
+ 2 | export { getStaticPaths } from "a";
+   :          ^^^^^^^^^^^^^^
+   `----

packages/next-swc/crates/next-transform-strip-page-exports/tests/errors/static-props-after-server-side/input.js

@@ -0,0 +1 @@
+export { getStaticProps, getServerSideProps };

packages/next-swc/crates/next-transform-strip-page-exports/tests/errors/static-props-after-server-side/output.stderr

@@ -0,0 +1,6 @@
+
+  x You can not use getStaticProps or getStaticPaths with getServerSideProps. To use SSG, please remove getServerSideProps
+   ,-[input.js:1:1]
+ 1 | export { getStaticProps, getServerSideProps };
+   :                          ^^^^^^^^^^^^^^^^^^
+   `----

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixture.rs

@@ -0,0 +1,68 @@
+use std::path::{Path, PathBuf};
+
+use next_transform_strip_page_exports::{next_transform_strip_page_exports, ExportFilter};
+use swc_core::{
+    common::{chain, comments::SingleThreadedComments, Mark},
+    ecma::{
+        parser::{EsConfig, Syntax},
+        transforms::{
+            react::jsx,
+            testing::{test, test_fixture},
+        },
+    },
+};
+use testing::fixture;
+
+fn syntax() -> Syntax {
+    Syntax::Es(EsConfig {
+        jsx: true,
+        ..Default::default()
+    })
+}
+
+fn run_test(input: &Path, output: &Path, mode: ExportFilter) {
+    test_fixture(
+        syntax(),
+        &|tr| {
+            let top_level_mark = Mark::fresh(Mark::root());
+            let jsx = jsx::<SingleThreadedComments>(
+                tr.cm.clone(),
+                None,
+                swc_core::ecma::transforms::react::Options {
+                    next: false.into(),
+                    runtime: None,
+                    import_source: Some("".into()),
+                    pragma: Some("__jsx".into()),
+                    pragma_frag: Some("__jsxFrag".into()),
+                    throw_if_namespace: false.into(),
+                    development: false.into(),
+                    use_builtins: true.into(),
+                    use_spread: true.into(),
+                    refresh: Default::default(),
+                },
+                top_level_mark,
+            );
+            chain!(
+                next_transform_strip_page_exports(mode, Default::default()),
+                jsx
+            )
+        },
+        input,
+        output,
+        Default::default(),
+    );
+}
+
+#[fixture("tests/fixtures/**/output-data.js")]
+fn next_transform_strip_page_exports_fixture_data(output: PathBuf) {
+    let input = output.parent().unwrap().join("input.js");
+
+    run_test(&input, &output, ExportFilter::StripDefaultExport);
+}
+
+#[fixture("tests/fixtures/**/output-default.js")]
+fn next_transform_strip_page_exports_fixture_default(output: PathBuf) {
+    let input = output.parent().unwrap().join("input.js");
+
+    run_test(&input, &output, ExportFilter::StripDataExports);
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getInitialProps/class/input.js

@@ -0,0 +1,11 @@
+export default class Page {
+  static async getInitialProps() {
+    return {
+      prop: true,
+    };
+  }
+
+  render() {
+    return <div />;
+  }
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getInitialProps/class/output-default.js

@@ -0,0 +1,11 @@
+export default class Page {
+  static async getInitialProps() {
+    return {
+      prop: true,
+    };
+  }
+
+  render() {
+    return __jsx("div", null);
+  }
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getInitialProps/function-anon-function/input.js

@@ -0,0 +1,9 @@
+export default function Page() {
+  return <div />;
+}
+
+Page.getInitialProps = function () {
+  return {
+    prop: true,
+  };
+};

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getInitialProps/function-anon-function/output-default.js

@@ -0,0 +1,9 @@
+export default function Page() {
+  return __jsx("div", null);
+}
+
+Page.getInitialProps = function () {
+  return {
+    prop: true,
+  };
+};

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getInitialProps/function-arrow/input.js

@@ -0,0 +1,9 @@
+export default function Page() {
+  return <div />;
+}
+
+Page.getInitialProps = () => {
+  return {
+    prop: true,
+  };
+};

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getInitialProps/function-arrow/output-default.js

@@ -0,0 +1,9 @@
+export default function Page() {
+  return __jsx("div", null);
+}
+
+Page.getInitialProps = () => {
+  return {
+    prop: true,
+  };
+};

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getInitialProps/function-before/input.js

@@ -0,0 +1,9 @@
+Page.getInitialProps = function () {
+  return {
+    prop: true,
+  };
+};
+
+export default function Page() {
+  return <div />;
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getInitialProps/function-before/output-default.js

@@ -0,0 +1,9 @@
+Page.getInitialProps = function () {
+  return {
+    prop: true,
+  };
+};
+
+export default function Page() {
+  return __jsx("div", null);
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getInitialProps/function-named-function/input.js

@@ -0,0 +1,9 @@
+export default function Page() {
+  return <div />;
+}
+
+Page.getInitialProps = function getInitialProps() {
+  return {
+    prop: true,
+  };
+};

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getInitialProps/function-named-function/output-default.js

@@ -0,0 +1,9 @@
+export default function Page() {
+  return __jsx("div", null);
+}
+
+Page.getInitialProps = function getInitialProps() {
+  return {
+    prop: true,
+  };
+};

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getInitialProps/reused-elsewhere/input.js

@@ -0,0 +1,9 @@
+export default function Page() {
+  return <div />;
+}
+
+const getInitialProps = (Page.getInitialProps = function getInitialProps() {
+  return {
+    prop: true,
+  };
+});

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getInitialProps/reused-elsewhere/output-data.js

@@ -0,0 +1,5 @@
+const getInitialProps = function getInitialProps() {
+  return {
+    prop: true,
+  };
+};

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getInitialProps/reused-elsewhere/output-default.js

@@ -0,0 +1,8 @@
+export default function Page() {
+    return __jsx("div", null);
+}
+const getInitialProps = Page.getInitialProps = function getInitialProps() {
+    return {
+        prop: true
+    };
+};

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getServerSideProps/destructuring-assignment-array/input.js

@@ -0,0 +1,15 @@
+import fs from "fs";
+import other from "other";
+
+const [a, b, ...rest] = fs.promises;
+const [foo, bar] = other;
+
+export async function getServerSideProps() {
+  a;
+  b;
+  rest;
+  bar;
+}
+export default function Home() {
+  return <div />;
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getServerSideProps/destructuring-assignment-array/output-data.js

@@ -0,0 +1,10 @@
+import fs from "fs";
+import other from "other";
+const [a, b, ...rest] = fs.promises;
+const [foo, bar] = other;
+export async function getServerSideProps() {
+  a;
+  b;
+  rest;
+  bar;
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getServerSideProps/destructuring-assignment-array/output-default.js

@@ -0,0 +1,6 @@
+import other from "other";
+const [foo] = other;
+export var __N_SSP = true;
+export default function Home() {
+  return __jsx("div", null);
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getServerSideProps/query-usage/input.js

@@ -0,0 +1,7 @@
+export async function getServerSideProps({ query }) {
+  return { props: { prop: query.prop } };
+}
+
+export default function GspPage({ prop }) {
+  return <div id="prop">{prop}</div>;
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getServerSideProps/query-usage/output-data.js

@@ -0,0 +1,7 @@
+export async function getServerSideProps({ query }) {
+  return {
+    props: {
+      prop: query.prop,
+    },
+  };
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getServerSideProps/query-usage/output-default.js

@@ -0,0 +1,10 @@
+export var __N_SSP = true;
+export default function GspPage({ prop }) {
+  return __jsx(
+    "div",
+    {
+      id: "prop",
+    },
+    prop
+  );
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/destructuring-assignment-array-expr/input.js

@@ -0,0 +1,15 @@
+import fs from "fs";
+import other from "other";
+
+const [a, b, ...rest] = fs.promises;
+const [foo, bar] = other;
+
+export async function getStaticProps() {
+  a;
+  b;
+  rest;
+  bar;
+}
+export default function Home() {
+  return <div />;
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/destructuring-assignment-array-expr/output-data.js

@@ -0,0 +1,10 @@
+import fs from "fs";
+import other from "other";
+const [a, b, ...rest] = fs.promises;
+const [foo, bar] = other;
+export async function getStaticProps() {
+  a;
+  b;
+  rest;
+  bar;
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/destructuring-assignment-array-expr/output-default.js

@@ -0,0 +1,6 @@
+import other from "other";
+const [foo] = other;
+export var __N_SSG = true;
+export default function Home() {
+  return __jsx("div", null);
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/destructuring-assignment-array/input.js

@@ -0,0 +1,17 @@
+import fs from "fs";
+import other from "other";
+
+let a, b, rest;
+[a, b, ...rest] = fs.promises;
+let foo, bar;
+[foo, bar] = other;
+
+export async function getStaticProps() {
+  a;
+  b;
+  rest;
+  bar;
+}
+export default function Home() {
+  return <div />;
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/destructuring-assignment-array/output-data.js

@@ -0,0 +1,12 @@
+import fs from "fs";
+import other from "other";
+let a, b, rest;
+[a, b, ...rest] = fs.promises;
+let foo, bar;
+[foo, bar] = other;
+export async function getStaticProps() {
+  a;
+  b;
+  rest;
+  bar;
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/destructuring-assignment-array/output-default.js

@@ -0,0 +1,7 @@
+import other from "other";
+let foo;
+[foo] = other;
+export var __N_SSG = true;
+export default function Home() {
+  return __jsx("div", null);
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/destructuring-assignment-object/input.js

@@ -0,0 +1,17 @@
+import fs from "fs";
+import other from "other";
+
+const { readFile, readdir, access: foo } = fs.promises;
+const { a, b, cat: bar, ...rem } = other;
+
+export async function getStaticProps() {
+  readFile;
+  readdir;
+  foo;
+  b;
+  cat;
+  rem;
+}
+export default function Home() {
+  return <div />;
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/destructuring-assignment-object/output-data.js

@@ -0,0 +1,12 @@
+import fs from "fs";
+import other from "other";
+const { readFile, readdir, access: foo } = fs.promises;
+const { a, b, cat: bar, ...rem } = other;
+export async function getStaticProps() {
+  readFile;
+  readdir;
+  foo;
+  b;
+  cat;
+  rem;
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/destructuring-assignment-object/output-default.js

@@ -0,0 +1,6 @@
+import other from "other";
+const { a, cat: bar } = other;
+export var __N_SSG = true;
+export default function Home() {
+  return __jsx("div", null);
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/issue-30091/input.js

@@ -0,0 +1,14 @@
+export default function Home({}) {
+  return (
+    <div>
+      <p>Hello World</p>
+    </div>
+  );
+}
+
+export async function getStaticProps() {
+  await import("_http_common").then((http) => console.log(http));
+  return {
+    props: {},
+  };
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/issue-30091/output-data.js

@@ -0,0 +1,6 @@
+export async function getStaticProps() {
+  await import("_http_common").then((http) => console.log(http));
+  return {
+    props: {},
+  };
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/issue-30091/output-default.js

@@ -0,0 +1,4 @@
+export var __N_SSG = true;
+export default function Home({}) {
+  return __jsx("div", null, __jsx("p", null, "Hello World"));
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/issue-31855/input.js

@@ -0,0 +1,16 @@
+export const revalidateInSeconds = 5 * 60;
+
+export const getStaticProps = async () => {
+  return {
+    props: {},
+    revalidate: revalidateInSeconds,
+  };
+};
+
+export default function Home({}) {
+  return (
+    <div>
+      <p>Hello World</p>
+    </div>
+  );
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/issue-31855/output-data.js

@@ -0,0 +1,7 @@
+export const revalidateInSeconds = 5 * 60;
+export const getStaticProps = async () => {
+  return {
+    props: {},
+    revalidate: revalidateInSeconds,
+  };
+};

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/issue-31855/output-default.js

@@ -0,0 +1,5 @@
+export var __N_SSG = true;
+export const revalidateInSeconds = 5 * 60;
+export default function Home({}) {
+  return __jsx("div", null, __jsx("p", null, "Hello World"));
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/no-props/input.js

@@ -0,0 +1,3 @@
+export default function Home() {
+  return <h1>Hello World!</h1>;
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/no-props/output-default.js

@@ -0,0 +1,3 @@
+export default function Home() {
+  return __jsx("h1", null, "Hello World!");
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-not-crash-for-class-declarations/input.js

@@ -0,0 +1,11 @@
+function getStaticPaths() {
+  return [];
+}
+
+export { getStaticPaths };
+
+export class MyClass {}
+
+export default function Test() {
+  return <div />;
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-not-crash-for-class-declarations/output-data.js

@@ -0,0 +1,5 @@
+function getStaticPaths() {
+  return [];
+}
+export { getStaticPaths };
+export class MyClass {}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-not-crash-for-class-declarations/output-default.js

@@ -0,0 +1,5 @@
+export var __N_SSG = true;
+export class MyClass {}
+export default function Test() {
+  return __jsx("div", null);
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-not-mix-up-bindings/input.js

@@ -0,0 +1,14 @@
+function Function1() {
+  return {
+    a: function bug(a) {
+      return 2;
+    },
+  };
+}
+
+function Function2() {
+  var bug = 1;
+  return { bug };
+}
+
+export { getStaticProps } from "a";

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-not-mix-up-bindings/output-data.js

@@ -0,0 +1,14 @@
+function Function1() {
+  return {
+    a: function bug(a) {
+      return 2;
+    },
+  };
+}
+function Function2() {
+  var bug = 1;
+  return {
+    bug,
+  };
+}
+export { getStaticProps } from "a";

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-not-mix-up-bindings/output-default.js

@@ -0,0 +1,11 @@
+function Function1() {
+  return {
+    a: function bug(a) {
+      return 2;
+    },
+  };
+}
+function Function2() {
+  var bug = 1;
+  return { bug };
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-not-remove-extra-named-export-function-declarations/input.js

@@ -0,0 +1,9 @@
+export function getStaticProps() {
+  return { props: {} };
+}
+
+export function Noop() {}
+
+export default function Test() {
+  return <div />;
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-not-remove-extra-named-export-function-declarations/output-data.js

@@ -0,0 +1,6 @@
+export function getStaticProps() {
+  return {
+    props: {},
+  };
+}
+export function Noop() {}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-not-remove-extra-named-export-function-declarations/output-default.js

@@ -0,0 +1,5 @@
+export var __N_SSG = true;
+export function Noop() {}
+export default function Test() {
+  return __jsx("div", null);
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-not-remove-extra-named-export-variable-declarations/input.js

@@ -0,0 +1,12 @@
+export const getStaticPaths = () => {
+    return [];
+  },
+  foo = 2;
+
+export const getStaticProps = function () {
+  return { props: {} };
+};
+
+export default function Test() {
+  return <div />;
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-not-remove-extra-named-export-variable-declarations/output-data.js

@@ -0,0 +1,9 @@
+export const getStaticPaths = () => {
+    return [];
+  },
+  foo = 2;
+export const getStaticProps = function () {
+  return {
+    props: {},
+  };
+};

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-not-remove-extra-named-export-variable-declarations/output-default.js

@@ -0,0 +1,5 @@
+export var __N_SSG = true;
+export const foo = 2;
+export default function Test() {
+  return __jsx("div", null);
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-not-remove-import-used-in-other-export/input.js

@@ -0,0 +1,15 @@
+import { foo, bar } from "thing";
+
+export default function Home() {
+  foo;
+  return <div />;
+}
+
+export function otherExport() {
+  foo;
+  bar;
+}
+
+export async function getStaticProps() {
+  bar;
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-not-remove-import-used-in-other-export/output-data.js

@@ -0,0 +1,10 @@
+import { foo, bar } from "thing";
+
+export function otherExport() {
+  foo;
+  bar;
+}
+
+export async function getStaticProps() {
+  bar;
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-not-remove-import-used-in-other-export/output-default.js

@@ -0,0 +1,12 @@
+import { foo, bar } from "thing";
+
+export var __N_SSG = true;
+export default function Home() {
+  foo;
+  return __jsx("div", null);
+}
+
+export function otherExport() {
+  foo;
+  bar;
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-not-remove-import-used-in-render/input.js

@@ -0,0 +1,47 @@
+import { useState, useEffect } from "react";
+import {
+  Root,
+  Children,
+  JSXMemberExpression,
+  AttributeValue,
+  AttributeJSX,
+  ValueInRender,
+  ValueInEffect,
+  UnusedInRender,
+} from "../";
+
+export default function Test() {
+  const [x, setX] = useState(ValueInRender.value);
+  useEffect(() => {
+    setX(ValueInEffect.value);
+  }, []);
+
+  return (
+    <Root x={x}>
+      <div>
+        <Children attr={AttributeValue} jsx={<AttributeJSX />} />
+        <JSXMemberExpression.Deep.Property />
+      </div>
+    </Root>
+  );
+}
+
+export async function getStaticProps() {
+  return {
+    props: {
+      // simulate import usage inside getStaticProps
+      used: [
+        // these import references should not be removed
+        Root.value,
+        Children.value,
+        AttributeValue.value,
+        AttributeJSX.value,
+        ValueInRender.value,
+        ValueInEffect.value,
+        JSXMemberExpression.value,
+        // this import reference should be removed
+        UnusedInRender.value,
+      ],
+    },
+  };
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-not-remove-import-used-in-render/output-data.js

@@ -0,0 +1,29 @@
+import {
+  Root,
+  Children,
+  JSXMemberExpression,
+  AttributeValue,
+  AttributeJSX,
+  ValueInRender,
+  ValueInEffect,
+  UnusedInRender,
+} from "../";
+export async function getStaticProps() {
+  return {
+    props: {
+      // simulate import usage inside getStaticProps
+      used: [
+        // these import references should not be removed
+        Root.value,
+        Children.value,
+        AttributeValue.value,
+        AttributeJSX.value,
+        ValueInRender.value,
+        ValueInEffect.value,
+        JSXMemberExpression.value,
+        // this import reference should be removed
+        UnusedInRender.value,
+      ],
+    },
+  };
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-not-remove-import-used-in-render/output-default.js

@@ -0,0 +1,32 @@
+import { useState, useEffect } from "react";
+import {
+  Root,
+  Children,
+  JSXMemberExpression,
+  AttributeValue,
+  AttributeJSX,
+  ValueInRender,
+  ValueInEffect,
+} from "../";
+export var __N_SSG = true;
+export default function Test() {
+  const [x, setX] = useState(ValueInRender.value);
+  useEffect(() => {
+    setX(ValueInEffect.value);
+  }, []);
+  return __jsx(
+    Root,
+    {
+      x: x,
+    },
+    __jsx(
+      "div",
+      null,
+      __jsx(Children, {
+        attr: AttributeValue,
+        jsx: __jsx(AttributeJSX, null),
+      }),
+      __jsx(JSXMemberExpression.Deep.Property, null)
+    )
+  );
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-not-remove-unused-function/input.js

@@ -0,0 +1,2 @@
+function funfun() {}
+(function funfunfun() {});

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-not-remove-unused-function/output-data.js

@@ -0,0 +1,2 @@
+function funfun() {}
+(function funfunfun() {});

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-not-remove-unused-function/output-default.js

@@ -0,0 +1,2 @@
+function funfun() {}
+(function funfunfun() {});

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-remove-combined-named-export-specifiers/input.js

@@ -0,0 +1,5 @@
+export { getStaticPaths, a as getStaticProps } from ".";
+
+export default function Test() {
+  return <div />;
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-remove-combined-named-export-specifiers/output-data.js

@@ -0,0 +1 @@
+export { getStaticPaths, a as getStaticProps } from ".";

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-remove-combined-named-export-specifiers/output-default.js

@@ -0,0 +1,4 @@
+export var __N_SSG = true;
+export default function Test() {
+  return __jsx("div", null);
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-remove-extra-named-export-specifiers/input.js

@@ -0,0 +1,5 @@
+export { getStaticPaths, a as getStaticProps, foo, bar as baz } from ".";
+
+export default function Test() {
+  return <div />;
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-remove-extra-named-export-specifiers/output-data.js

@@ -0,0 +1 @@
+export { getStaticPaths, a as getStaticProps, foo, bar as baz } from ".";

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-remove-extra-named-export-specifiers/output-default.js

@@ -0,0 +1,5 @@
+export var __N_SSG = true;
+export { foo, bar as baz } from ".";
+export default function Test() {
+  return __jsx("div", null);
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-remove-named-export-function-declarations-async/input.js

@@ -0,0 +1,11 @@
+export async function getStaticPaths() {
+  return [];
+}
+
+export async function getStaticProps() {
+  return { props: {} };
+}
+
+export default function Test() {
+  return <div />;
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-remove-named-export-function-declarations-async/output-data.js

@@ -0,0 +1,8 @@
+export async function getStaticPaths() {
+  return [];
+}
+export async function getStaticProps() {
+  return {
+    props: {},
+  };
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-remove-named-export-function-declarations-async/output-default.js

@@ -0,0 +1,4 @@
+export var __N_SSG = true;
+export default function Test() {
+  return __jsx("div", null);
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-remove-named-export-function-declarations/input.js

@@ -0,0 +1,11 @@
+export function getStaticPaths() {
+  return [];
+}
+
+export function getStaticProps() {
+  return { props: {} };
+}
+
+export default function Test() {
+  return <div />;
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-remove-named-export-function-declarations/output-data.js

@@ -0,0 +1,8 @@
+export function getStaticPaths() {
+  return [];
+}
+export function getStaticProps() {
+  return {
+    props: {},
+  };
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-remove-named-export-function-declarations/output-default.js

@@ -0,0 +1,4 @@
+export var __N_SSG = true;
+export default function Test() {
+  return __jsx("div", null);
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-remove-named-export-variable-declarations-async/input.js

@@ -0,0 +1,11 @@
+export const getStaticPaths = async () => {
+  return [];
+};
+
+export const getStaticProps = async function () {
+  return { props: {} };
+};
+
+export default function Test() {
+  return <div />;
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-remove-named-export-variable-declarations-async/output-data.js

@@ -0,0 +1,8 @@
+export const getStaticPaths = async () => {
+  return [];
+};
+export const getStaticProps = async function () {
+  return {
+    props: {},
+  };
+};

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-remove-named-export-variable-declarations-async/output-default.js

@@ -0,0 +1,4 @@
+export var __N_SSG = true;
+export default function Test() {
+  return __jsx("div", null);
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-remove-named-export-variable-declarations/input.js

@@ -0,0 +1,11 @@
+export const getStaticPaths = () => {
+  return [];
+};
+
+export const getStaticProps = function () {
+  return { props: {} };
+};
+
+export default function Test() {
+  return <div />;
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-remove-named-export-variable-declarations/output-data.js

@@ -0,0 +1,8 @@
+export const getStaticPaths = () => {
+  return [];
+};
+export const getStaticProps = function () {
+  return {
+    props: {},
+  };
+};

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-remove-named-export-variable-declarations/output-default.js

@@ -0,0 +1,4 @@
+export var __N_SSG = true;
+export default function Test() {
+  return __jsx("div", null);
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-remove-re-exported-function-declarations-dependents-variables-functions-imports/input.js

@@ -0,0 +1,79 @@
+import keep_me from "hello";
+import { keep_me2 } from "hello2";
+import * as keep_me3 from "hello3";
+
+import data_only1 from "data_only1";
+import { data_only2 } from "data_only2";
+import { data_only3, shared4 } from "shared4";
+import * as data_only4 from "data_only4";
+
+import default_only1 from "default_only1";
+import { default_only2 } from "default_only2";
+import { default_only3, shared5 } from "shared5";
+import * as default_only4 from "default_only4";
+
+var leave_me_alone = 1;
+function dont_bug_me_either() {}
+
+const data_inception = "hahaa";
+
+var data_var1 = 1;
+let data_var2 = 2;
+const data_var3 = data_inception + data_only4;
+
+function data_inception1() {
+  data_var2;
+  data_only2;
+}
+
+function data_abc() {}
+const data_b = function () {
+  data_var3;
+  data_only3;
+};
+const data_b2 = function data_apples() {};
+const data_bla = () => {
+  data_inception1;
+};
+
+function getStaticProps() {
+  data_abc();
+  data_only1;
+  data_b;
+  data_b2;
+  data_bla();
+  return { props: { data_var1 } };
+}
+
+export { getStaticProps };
+
+const default_inception = "hahaa";
+
+var default_var1 = 1;
+let default_var2 = 2;
+const default_var3 = default_inception + default_only4;
+
+function default_inception1() {
+  default_var2;
+  default_only2;
+}
+
+function default_abc() {}
+const default_b = function () {
+  default_var3;
+  default_only3;
+};
+const default_b2 = function default_apples() {};
+const default_bla = () => {
+  default_inception1;
+};
+
+export default function Test() {
+  default_abc();
+  default_only1;
+  default_b;
+  default_b2;
+  default_bla();
+  const props = { default_var1 };
+  return <div />;
+}

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-remove-re-exported-function-declarations-dependents-variables-functions-imports/output-data.js

@@ -0,0 +1,40 @@
+import keep_me from "hello";
+import { keep_me2 } from "hello2";
+import * as keep_me3 from "hello3";
+import data_only1 from "data_only1";
+import { data_only2 } from "data_only2";
+import { data_only3, shared4 } from "shared4";
+import * as data_only4 from "data_only4";
+import { shared5 } from "shared5";
+var leave_me_alone = 1;
+function dont_bug_me_either() {}
+const data_inception = "hahaa";
+var data_var1 = 1;
+let data_var2 = 2;
+const data_var3 = data_inception + data_only4;
+function data_inception1() {
+  data_var2;
+  data_only2;
+}
+function data_abc() {}
+const data_b = function () {
+  data_var3;
+  data_only3;
+};
+const data_b2 = function data_apples() {};
+const data_bla = () => {
+  data_inception1;
+};
+function getStaticProps() {
+  data_abc();
+  data_only1;
+  data_b;
+  data_b2;
+  data_bla();
+  return {
+    props: {
+      data_var1,
+    },
+  };
+}
+export { getStaticProps };

packages/next-swc/crates/next-transform-strip-page-exports/tests/fixtures/getStaticProps/should-remove-re-exported-function-declarations-dependents-variables-functions-imports/output-default.js

@@ -0,0 +1,39 @@
+import keep_me from "hello";
+import { keep_me2 } from "hello2";
+import * as keep_me3 from "hello3";
+import { shared4 } from "shared4";
+import default_only1 from "default_only1";
+import { default_only2 } from "default_only2";
+import { default_only3, shared5 } from "shared5";
+import * as default_only4 from "default_only4";
+var leave_me_alone = 1;
+function dont_bug_me_either() {}
+const default_inception = "hahaa";
+var default_var1 = 1;
+let default_var2 = 2;
+const default_var3 = default_inception + default_only4;
+function default_inception1() {
+  default_var2;
+  default_only2;
+}
+function default_abc() {}
+const default_b = function () {
+  default_var3;
+  default_only3;
+};
+const default_b2 = function default_apples() {};
+const default_bla = () => {
+  default_inception1;
+};
+export var __N_SSG = true;
+export default function Test() {
+  default_abc();
+  default_only1;
+  default_b;
+  default_b2;
+  default_bla();
+  const props = {
+    default_var1,
+  };
+  return __jsx("div", null);
+}