Simplify rule fingerprinting in RepositoryFunction

--
MOS_MIGRATED_REVID=108986856

1 files changed, 37 insertions, 0 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/packages/RuleSerializer.java b/src/main/java/com/google/devtools/build/lib/packages/RuleSerializer.java
new file mode 100644
index 0000000000..5d49b4b420
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/packages/RuleSerializer.java
@@ -0,0 +1,37 @@
+// Copyright 2015 The Bazel Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+package com.google.devtools.build.lib.packages;
+
+import com.google.devtools.build.lib.query2.proto.proto2api.Build;
+
+/** Serialize a {@link Rule} as its protobuf representation. */
+public class RuleSerializer {
+
+  public static Build.Rule.Builder serializeRule(Rule rule) {
+    Build.Rule.Builder builder = Build.Rule.newBuilder();
+    builder.setName(rule.getLabel().getName());
+    builder.setRuleClass(rule.getRuleClass());
+    builder.setPublicByDefault(rule.getRuleClassObject().isPublicByDefault());
+    for (Attribute attribute : rule.getAttributes()) {
+      builder.addAttribute(
+          AttributeSerializer.getAttributeProto(
+              attribute,
+              AttributeSerializer.getAttributeValues(rule, attribute),
+              rule.isAttributeValueExplicitlySpecified(attribute),
+              /*includeGlobs=*/ true));
+    }
+    return builder;
+  }
+}
+