Add a SkyFunction to perform toolchain resolution.

Part of #2219.

Change-Id: I339009c13639144ca756eb07c520df7d430a64e3
PiperOrigin-RevId: 161826487

1 files changed, 75 insertions, 0 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/skyframe/ToolchainResolutionValue.java b/src/main/java/com/google/devtools/build/lib/skyframe/ToolchainResolutionValue.java
new file mode 100644
index 0000000000..1f553e6350
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/skyframe/ToolchainResolutionValue.java
@@ -0,0 +1,75 @@
+// Copyright 2017 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.skyframe;
+
+import com.google.auto.value.AutoValue;
+import com.google.devtools.build.lib.analysis.config.BuildConfiguration;
+import com.google.devtools.build.lib.analysis.platform.PlatformInfo;
+import com.google.devtools.build.lib.cmdline.Label;
+import com.google.devtools.build.skyframe.SkyFunctionName;
+import com.google.devtools.build.skyframe.SkyKey;
+import com.google.devtools.build.skyframe.SkyValue;
+
+/** A value which represents the selected toolchain for a specific target and execution platform. */
+@AutoValue
+public abstract class ToolchainResolutionValue implements SkyValue {
+
+  // A key representing the input data.
+  public static SkyKey key(
+      BuildConfiguration configuration,
+      Label toolchainType,
+      PlatformInfo targetPlatform,
+      PlatformInfo execPlatform) {
+    return ToolchainResolutionKey.create(
+        configuration, toolchainType, targetPlatform, execPlatform);
+  }
+
+  /** {@link SkyKey} implementation used for {@link ToolchainResolutionFunction}. */
+  @AutoValue
+  public abstract static class ToolchainResolutionKey implements SkyKey {
+    @Override
+    public SkyFunctionName functionName() {
+      return SkyFunctions.TOOLCHAIN_RESOLUTION;
+    }
+
+    @Override
+    public ToolchainResolutionKey argument() {
+      return this;
+    }
+
+    public abstract BuildConfiguration configuration();
+
+    public abstract Label toolchainType();
+
+    public abstract PlatformInfo targetPlatform();
+
+    public abstract PlatformInfo execPlatform();
+
+    public static ToolchainResolutionKey create(
+        BuildConfiguration configuration,
+        Label toolchainType,
+        PlatformInfo targetPlatform,
+        PlatformInfo execPlatform) {
+      return new AutoValue_ToolchainResolutionValue_ToolchainResolutionKey(
+          configuration, toolchainType, targetPlatform, execPlatform);
+    }
+  }
+
+  public static ToolchainResolutionValue create(Label toolchainLabel) {
+    return new AutoValue_ToolchainResolutionValue(toolchainLabel);
+  }
+
+  public abstract Label toolchainLabel();
+}