Move the empty package allowlist into the new allowlists directory.

PiperOrigin-RevId: 516352673

src/google/protobuf/compiler/allowlists/BUILD.bazel

@@ -19,7 +19,10 @@ cc_library(
 
 cc_library(
     name = "allowlists",
-    srcs = ["allowlists.cc"],
+    srcs = [
+        "empty_package.cc",
+        "weak_imports.cc",
+    ],
     hdrs = ["allowlists.h"],
     copts = COPTS,
     include_prefix = "google/protobuf/compiler/allowlists",

src/google/protobuf/compiler/allowlists/allowlists.h

@@ -40,6 +40,9 @@ namespace compiler {
 // Returns whether a file can use the `import weak` syntax.
 bool IsWeakImportFile(absl::string_view file);
 
+// Returns whether a file can have an empty package.
+bool IsEmptyPackageFile(absl::string_view file);
+
 }  // namespace compiler
 }  // namespace protobuf
 }  // namespace google

src/google/protobuf/compiler/allowlists/empty_package.cc

@@ -0,0 +1,61 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc.  All rights reserved.
+// https://developers.google.com/protocol-buffers/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include "absl/strings/string_view.h"
+#include "google/protobuf/compiler/allowlists/allowlist.h"
+#include "google/protobuf/compiler/allowlists/allowlists.h"
+
+namespace google {
+namespace protobuf {
+namespace compiler {
+// NOTE: Allowlists in this file are not accepting new entries unless otherwise
+// specified.
+
+static constexpr auto kEmptyPackage = internal::MakeAllowlist(
+    {
+// Intentionally left blank.
+    },
+    internal::AllowlistFlags::kAllowAllInOss);
+
+static constexpr auto kTradeFedProtos = internal::MakeAllowlist({
+// Intentionally left blank.
+});
+
+static constexpr auto k3pCriuProtos = internal::MakeAllowlist({
+// Intentionally left blank.
+});
+
+bool IsEmptyPackageFile(absl::string_view file) {
+  return kEmptyPackage.Allows(file) || kTradeFedProtos.Allows(file) ||
+         k3pCriuProtos.Allows(file);
+}
+}  // namespace compiler
+}  // namespace protobuf
+}  // namespace google

src/google/protobuf/compiler/allowlists/weak_imports.cc

@@ -44,10 +44,9 @@ static constexpr auto kWeakImports = internal::MakeAllowlist({
 // Intentionally left blank.
 });
 
-bool IsWeakImportFile(absl::string_view filename) {
-  return kWeakImports.Allows(filename);
+bool IsWeakImportFile(absl::string_view file) {
+  return kWeakImports.Allows(file);
 }
-
 }  // namespace compiler
 }  // namespace protobuf
 }  // namespace google