commit fb829994988798e3d6663d66497f4614148ea79a
author cpeyser <cpeyser@google.com> Thu Sep 07 17:17:03 2017 +0200
committer Yun Peng <pcloudy@google.com> Fri Sep 08 09:47:23 2017 +0200
tree 76dbe3bfd1c3ff44ea67750a8bc3c7bef890489b
parent 4e79061f74a03dd9274f88ff42a7e2c0d6adae6c

Rule classes cannot request duplicate toolchains.

PiperOrigin-RevId: 167861778

src/main/java/com/google/devtools/build/lib/packages/RuleClass.java

diff --git a/src/main/java/com/google/devtools/build/lib/packages/RuleClass.java b/src/main/java/com/google/devtools/build/lib/packages/RuleClass.java
index 3a222db..dcf6092 100644
--- a/src/main/java/com/google/devtools/build/lib/packages/RuleClass.java
+++ b/src/main/java/com/google/devtools/build/lib/packages/RuleClass.java
@@ -59,6 +59,7 @@
 import java.util.Collection;
 import java.util.Collections;
 import java.util.HashMap;
+import java.util.HashSet;
 import java.util.LinkedHashMap;
 import java.util.LinkedHashSet;
 import java.util.List;
@@ -483,7 +484,7 @@
     private boolean supportsConstraintChecking = true;
 
     private final Map<String, Attribute> attributes = new LinkedHashMap<>();
-    private final List<Label> requiredToolchains = new ArrayList<>();
+    private final Set<Label> requiredToolchains = new HashSet<>();
 
     /**
      * Constructs a new {@code RuleClassBuilder} using all attributes from all
@@ -1115,7 +1116,7 @@
    */
   private final boolean supportsConstraintChecking;
 
-  private final ImmutableList<Label> requiredToolchains;
+  private final ImmutableSet<Label> requiredToolchains;
 
   /**
    * Constructs an instance of RuleClass whose name is 'name', attributes are 'attributes'. The
@@ -1163,7 +1164,7 @@
       String ruleDefinitionEnvironmentHashCode,
       ConfigurationFragmentPolicy configurationFragmentPolicy,
       boolean supportsConstraintChecking,
-      List<Label> requiredToolchains,
+      Set<Label> requiredToolchains,
       Attribute... attributes) {
     this.name = name;
     this.isSkylark = isSkylark;
@@ -1192,7 +1193,7 @@
     this.outputsDefaultExecutable = outputsDefaultExecutable;
     this.configurationFragmentPolicy = configurationFragmentPolicy;
     this.supportsConstraintChecking = supportsConstraintChecking;
-    this.requiredToolchains = ImmutableList.copyOf(requiredToolchains);
+    this.requiredToolchains = ImmutableSet.copyOf(requiredToolchains);
 
     // Create the index and collect non-configurable attributes.
     int index = 0;
@@ -2002,7 +2003,7 @@
     return outputsDefaultExecutable;
   }
 
-  public ImmutableList<Label> getRequiredToolchains() {
+  public ImmutableSet<Label> getRequiredToolchains() {
     return requiredToolchains;
   }