Refactor Server entrypoint to not import Client

This refactors the Server Components entrypoint for the `react` package
(ReactServer.js) so that it doesn't depend on the client entrypoint
(React.js). In the next step, I'll also rename React.js to
ReactClient.js to make the separation clearer.

This structure will make it easier to add client-only and server-
only features.

Author: acdlite

packages/react/src/ReactServer.experimental.js

@@ -14,6 +14,43 @@ export {default as __SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED} from './R
 
 export {default as __SECRET_SERVER_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED} from './ReactServerSharedInternals';
 
+import {forEach, map, count, toArray, only} from './ReactChildren';
+import {
+  REACT_FRAGMENT_TYPE,
+  REACT_PROFILER_TYPE,
+  REACT_STRICT_MODE_TYPE,
+  REACT_SUSPENSE_TYPE,
+  REACT_DEBUG_TRACING_MODE_TYPE,
+} from 'shared/ReactSymbols';
+import {cloneElement, createElement, isValidElement} from './ReactElement';
+import {createRef} from './ReactCreateRef';
+import {createServerContext} from './ReactServerContext';
+import {
+  use,
+  useId,
+  useCallback,
+  useContext,
+  useDebugValue,
+  useMemo,
+  getCacheSignal,
+  getCacheForType,
+} from './ReactHooks';
+import {forwardRef} from './ReactForwardRef';
+import {lazy} from './ReactLazy';
+import {memo} from './ReactMemo';
+import {cache} from './ReactCache';
+import {startTransition} from './ReactStartTransition';
+import {postpone} from './ReactPostpone';
+import version from 'shared/ReactVersion';
+
+const Children = {
+  map,
+  forEach,
+  count,
+  toArray,
+  only,
+};
+
 // These are server-only
 export {
   taintUniqueValue as experimental_taintUniqueValue,
@@ -22,10 +59,10 @@ export {
 
 export {
   Children,
-  Fragment,
-  Profiler,
-  StrictMode,
-  Suspense,
+  REACT_FRAGMENT_TYPE as Fragment,
+  REACT_PROFILER_TYPE as Profiler,
+  REACT_STRICT_MODE_TYPE as StrictMode,
+  REACT_SUSPENSE_TYPE as Suspense,
   cloneElement,
   createElement,
   createRef,
@@ -37,15 +74,15 @@ export {
   memo,
   cache,
   startTransition,
-  unstable_DebugTracingMode,
-  unstable_SuspenseList,
-  unstable_getCacheSignal,
-  unstable_getCacheForType,
-  unstable_postpone,
+  REACT_DEBUG_TRACING_MODE_TYPE as unstable_DebugTracingMode,
+  REACT_SUSPENSE_TYPE as unstable_SuspenseList,
+  getCacheSignal as unstable_getCacheSignal,
+  getCacheForType as unstable_getCacheForType,
+  postpone as unstable_postpone,
   useId,
   useCallback,
   useContext,
   useDebugValue,
   useMemo,
   version,
-} from './React';
+};

packages/react/src/ReactServer.js

@@ -14,12 +14,45 @@ export {default as __SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED} from './R
 
 export {default as __SECRET_SERVER_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED} from './ReactServerSharedInternals';
 
+import {forEach, map, count, toArray, only} from './ReactChildren';
+import {
+  REACT_FRAGMENT_TYPE,
+  REACT_PROFILER_TYPE,
+  REACT_STRICT_MODE_TYPE,
+  REACT_SUSPENSE_TYPE,
+} from 'shared/ReactSymbols';
+import {cloneElement, createElement, isValidElement} from './ReactElement';
+import {createRef} from './ReactCreateRef';
+import {createServerContext} from './ReactServerContext';
+import {
+  use,
+  useId,
+  useCallback,
+  useContext,
+  useDebugValue,
+  useMemo,
+} from './ReactHooks';
+import {forwardRef} from './ReactForwardRef';
+import {lazy} from './ReactLazy';
+import {memo} from './ReactMemo';
+import {cache} from './ReactCache';
+import {startTransition} from './ReactStartTransition';
+import version from 'shared/ReactVersion';
+
+const Children = {
+  map,
+  forEach,
+  count,
+  toArray,
+  only,
+};
+
 export {
   Children,
-  Fragment,
-  Profiler,
-  StrictMode,
-  Suspense,
+  REACT_FRAGMENT_TYPE as Fragment,
+  REACT_PROFILER_TYPE as Profiler,
+  REACT_STRICT_MODE_TYPE as StrictMode,
+  REACT_SUSPENSE_TYPE as Suspense,
   cloneElement,
   createElement,
   createRef,
@@ -37,4 +70,4 @@ export {
   useDebugValue,
   useMemo,
   version,
-} from './React';
+};