From 948e519093eb82c217e842eec61a88725689d9dc Mon Sep 17 00:00:00 2001
From: John Cater <jcater@google.com>
Date: Wed, 5 Jul 2017 14:30:32 -0400
Subject: Improve the ToolchainInfo provider and add more data.

Part of #2219.

Change-Id: Ie235d0a75fc50746331b20a7f2060e6d49ae48cb
PiperOrigin-RevId: 160982987
---
 .../build/lib/analysis/platform/PlatformProviderUtils.java     | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'src/main/java/com/google/devtools/build/lib/analysis/platform/PlatformProviderUtils.java')

diff --git a/src/main/java/com/google/devtools/build/lib/analysis/platform/PlatformProviderUtils.java b/src/main/java/com/google/devtools/build/lib/analysis/platform/PlatformProviderUtils.java
index 73664f7b04..56443af320 100644
--- a/src/main/java/com/google/devtools/build/lib/analysis/platform/PlatformProviderUtils.java
+++ b/src/main/java/com/google/devtools/build/lib/analysis/platform/PlatformProviderUtils.java
@@ -68,4 +68,14 @@ public class PlatformProviderUtils {
       Iterable<? extends SkylarkProviderCollection> targets) {
     return Iterables.transform(targets, PlatformProviderUtils::constraintValue);
   }
+
+  /** Retrieves and casts the {@link ToolchainInfo} provider from the given target. */
+  public static ToolchainInfo toolchain(SkylarkProviderCollection target) {
+    Object provider = target.get(ToolchainInfo.SKYLARK_IDENTIFIER);
+    if (provider == null) {
+      return null;
+    }
+    Preconditions.checkState(provider instanceof ToolchainInfo);
+    return (ToolchainInfo) provider;
+  }
 }
-- 
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