Code cleanup: renaming isSoftDeleted -> isSdkPackage.

app/bin/tools/search_benchmark.dart

@@ -21,7 +21,7 @@ Future<void> main(List<String> args) async {
   final snapshot = SearchSnapshot.fromJson(content);
   final index = InMemoryPackageIndex(
       documents:
-          snapshot.documents!.values.where((d) => !isSoftRemoved(d.package)));
+          snapshot.documents!.values.where((d) => !isSdkPackage(d.package)));
 
   // NOTE: please add more queries to this list, especially if there is a performance bottleneck.
   final queries = [

app/lib/frontend/handlers/custom_api.dart

@@ -38,7 +38,7 @@ import 'cache_control.dart';
 Future<shelf.Response> apiDocumentationHandler(
     shelf.Request request, String package) async {
   checkPackageVersionParams(package);
-  if (isSoftRemoved(package)) {
+  if (isSdkPackage(package)) {
     return jsonResponse({}, status: 404);
   }
 

app/lib/frontend/handlers/documentation.dart

@@ -28,8 +28,8 @@ Future<shelf.Response> documentationHandler(shelf.Request request) async {
     return notFoundHandler(request);
   }
   checkPackageVersionParams(docFilePath.package, docFilePath.version);
-  if (redirectPackageUrls.containsKey(docFilePath.package)) {
-    return redirectResponse(redirectPackageUrls[docFilePath.package]!);
+  if (isSdkPackage(docFilePath.package)) {
+    return redirectResponse(sdkPackageUrls[docFilePath.package]!);
   }
   if (!await packageBackend.isPackageVisible(docFilePath.package)) {
     return notFoundHandler(request);

app/lib/frontend/handlers/package.dart

@@ -233,8 +233,8 @@ Future<shelf.Response> packageScoreLogTxtHandler(
   String? version,
 }) async {
   checkPackageVersionParams(package, version);
-  if (redirectPackageUrls.containsKey(package)) {
-    return redirectResponse(redirectPackageUrls[package]!);
+  if (isSdkPackage(package)) {
+    return redirectResponse(sdkPackageUrls[package]!);
   }
   if (!await packageBackend.isPackageVisible(package)) {
     return shelf.Response.notFound('no such package');
@@ -289,8 +289,8 @@ Future<shelf.Response> _handlePackagePage({
   if (request.requestedUri.path != canonicalUrl) {
     return redirectResponse(canonicalUrl);
   }
-  if (redirectPackageUrls.containsKey(packageName)) {
-    return redirectResponse(redirectPackageUrls[packageName]!);
+  if (isSdkPackage(packageName)) {
+    return redirectResponse(sdkPackageUrls[packageName]!);
   }
   final Stopwatch sw = Stopwatch()..start();
   String? cachedPage;

app/lib/frontend/templates/views/pkg/info_box.dart

@@ -8,7 +8,7 @@ import 'package:pub_dev/service/download_counts/download_counts.dart';
 import 'package:pubspec_parse/pubspec_parse.dart' as pubspek;
 
 import '../../../../package/models.dart';
-import '../../../../package/overrides.dart' show redirectPackageUrls;
+import '../../../../package/overrides.dart' show sdkPackageUrls;
 import '../../../../package/screenshots/backend.dart';
 import '../../../../service/topics/models.dart';
 import '../../../../shared/urls.dart' as urls;
@@ -238,7 +238,7 @@ d.Node? _dependencyListNode(Map<String, pubspek.Dependency>? dependencies) {
       nodes.add(d.text(', '));
     }
     final dep = dependencies[p];
-    var href = redirectPackageUrls[p];
+    var href = sdkPackageUrls[p];
     String? constraint;
     if (href == null && dep is pubspek.HostedDependency) {
       href = urls.pkgPageUrl(p);

app/lib/package/backend.dart

@@ -137,7 +137,7 @@ class PackageBackend {
         .run()
         .where((p) => p.isVisible)
         .where((p) => p.isIncludedInRobots)
-        .where((p) => !isSoftRemoved(p.name!));
+        .where((p) => !isSdkPackage(p.name!));
   }
 
   /// Retrieves package versions ordered by their published date descending.
@@ -150,7 +150,7 @@ class PackageBackend {
     final versions = await query.run().toList();
     final results = <PackageVersion>[];
     for (final v in versions) {
-      if (isSoftRemoved(v.package)) continue;
+      if (isSdkPackage(v.package)) continue;
       if (!(await isPackageVisible(v.package))) continue;
       results.add(v);
     }
@@ -1011,7 +1011,7 @@ class PackageBackend {
           // purpose of checking if the dependency exists, we skip them.
           continue;
         }
-        if (isSoftRemoved(name)) {
+        if (isSdkPackage(name)) {
           continue;
         }
         if (nameTracker.hasPackage(name)) {

app/lib/package/name_tracker.dart

@@ -52,7 +52,7 @@ class TrackedPackage {
         updated: p.updated!,
         latestVersion: p.latestVersion!,
         lastPublished: p.lastVersionPublished!,
-        isVisible: p.isVisible && !isSoftRemoved(p.name!),
+        isVisible: p.isVisible && !isSdkPackage(p.name!),
       );
 
   @visibleForTesting

app/lib/package/overrides.dart

@@ -47,7 +47,8 @@ final _reservedPackageNames = <String>[
   'flutterkit',
 ].map(reducePackageName).toList();
 
-const redirectPackageUrls = <String, String>{
+/// Mapping packages names to URLs that we need to redirect them to after they become SDK packages.
+const sdkPackageUrls = <String, String>{
   'flutter': 'https://api.flutter.dev/',
   'flutter_driver':
       'https://api.flutter.dev/flutter/flutter_driver/flutter_driver-library.html',
@@ -81,10 +82,12 @@ const devDependencyPackages = <String>{
   'test_process',
 };
 
-/// A package is soft-removed when we keep it in the archives and index, but we
-/// won't serve the package or the documentation page, or any data about it.
-bool isSoftRemoved(String packageName) =>
-    redirectPackageUrls.containsKey(packageName);
+/// A package may become an SDK package, after which we redirect
+/// their UI page to a new location.
+///
+/// Note: we keep them in the archives, and keep serving their API information.
+bool isSdkPackage(String packageName) =>
+    sdkPackageUrls.containsKey(packageName);
 
 /// Whether the [name] is (very similar) to a reserved package name.
 bool matchesReservedPackageName(String name) =>

app/lib/search/backend.dart

@@ -151,7 +151,7 @@ class SearchBackend {
       if (!claim.valid) {
         return;
       }
-      if (isSoftRemoved(package)) {
+      if (isSdkPackage(package)) {
         return;
       }
       // Skip if the last document timestamp is before [updated].