--

MOS_MIGRATED_REVID=125790153

1 files changed, 9 insertions, 0 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/rules/proto/ProtoCompileActionBuilder.java b/src/main/java/com/google/devtools/build/lib/rules/proto/ProtoCompileActionBuilder.java
index 71a7aa4f4b..6af0f12efe 100644
--- a/src/main/java/com/google/devtools/build/lib/rules/proto/ProtoCompileActionBuilder.java
+++ b/src/main/java/com/google/devtools/build/lib/rules/proto/ProtoCompileActionBuilder.java
@@ -17,6 +17,7 @@ package com.google.devtools.build.lib.rules.proto;
 import static com.google.common.base.Preconditions.checkState;
 import static com.google.common.collect.Iterables.isEmpty;
 
+import com.google.common.base.Joiner;
 import com.google.common.base.Preconditions;
 import com.google.common.base.Supplier;
 import com.google.common.base.Suppliers;
@@ -56,6 +57,14 @@ public class ProtoCompileActionBuilder {
   private Iterable<String> additionalCommandLineArguments;
   private Iterable<FilesToRunProvider> additionalTools;
 
+  /**
+   * Build a proto compiler commandline argument for use in setXParameter methods.
+   */
+  public static String buildProtoArg(String arg, String value, Iterable<String> flags) {
+    return String.format("--%s=%s%s",
+        arg, (isEmpty(flags) ? "" : Joiner.on(',').join(flags) + ":"), value);
+  }
+
   public ProtoCompileActionBuilder setRuleContext(RuleContext ruleContext) {
     this.ruleContext = ruleContext;
     return this;