simplify logic and add more thorough tests

packages/next-swc/crates/core/src/next_ssg.rs

@@ -95,16 +95,13 @@ struct Analyzer<'a> {
     state: &'a mut State,
     in_lhs_of_var: bool,
     in_data_fn: bool,
-    in_render_fn: bool,
 }
 
 impl Analyzer<'_> {
     fn add_ref(&mut self, id: Id) {
         tracing::trace!("add_ref({}{:?}, data = {})", id.0, id.1, self.in_data_fn);
         if self.in_data_fn {
             self.state.refs_from_data_fn.insert(id);
-        } else if self.in_render_fn {
-            self.state.refs_from_other.insert(id);
         } else {
             if self.state.cur_declaring.contains(&id) {
                 return;
@@ -153,15 +150,12 @@ impl Fold for Analyzer<'_> {
             }
             _ => {}
         }
-        let jsx = jsx.fold_children_with(self);
-        jsx
+
+        jsx.fold_children_with(self)
     }
 
     fn fold_export_default_decl(&mut self, export: ExportDefaultDecl) -> ExportDefaultDecl {
-        self.in_render_fn = true;
-        let export = export.fold_children_with(self);
-        self.in_render_fn = false;
-        export
+        export.fold_children_with(self)
     }
 
     fn fold_fn_decl(&mut self, f: FnDecl) -> FnDecl {
@@ -333,7 +327,6 @@ impl NextSsg {
             state: &mut self.state,
             in_lhs_of_var: false,
             in_data_fn: true,
-            in_render_fn: false,
         };
 
         let n = n.fold_with(&mut v);
@@ -398,7 +391,6 @@ impl Fold for NextSsg {
                 state: &mut self.state,
                 in_lhs_of_var: false,
                 in_data_fn: false,
-                in_render_fn: false,
             };
             m = m.fold_with(&mut v);
         }

packages/next-swc/crates/core/tests/fixture/ssg/getStaticProps/should-not-remove-import-used-in-render/input.js

@@ -1,9 +1,36 @@
-import Component from '../'
+import { useState, useEffect } from 'react'
+import { Root, Children, AttributeValue, AttributeJSX, ValueInRender, ValueInEffect, UnusedInRender } from '../'
 
 export default function Test() {
-  return <Component />
+  const [x, setX] = useState(ValueInRender.value)
+  useEffect(() => {
+    setX(ValueInEffect.value)
+  }, [])
+
+  return (
+    <Root x={x}>
+      <div>
+        <Children attr={AttributeValue} jsx={<AttributeJSX />} />
+      </div>
+    </Root>
+  )
 }
 
 export async function getStaticProps() {
-  return { props: { name: Component.displayName } }
+  return {
+    props: {
+      // simulate Component usage inside getStaticProps
+      used: [
+        // these import references should not be removed
+        Root.value,
+        Children.value,
+        AttributeValue.value,
+        AttributeJSX.value,
+        ValueInRender.value,
+        ValueInEffect.value,
+        // this import reference should be removed
+        UnusedInRender.value,
+      ],
+    }
+  }
 }

packages/next-swc/crates/core/tests/fixture/ssg/getStaticProps/should-not-remove-import-used-in-render/output.js

@@ -1,5 +1,15 @@
-import Component from '../'
-export var __N_SSG = true
+import { useState, useEffect } from "react";
+import { Root, Children, AttributeValue, AttributeJSX, ValueInRender, ValueInEffect } from "../";
+export var __N_SSG = true;
 export default function Test() {
-  return __jsx(Component, null)
+    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)
+    })));
 }