ConfigurationsForTargetsTest should test the exec transition.

The host transition is being removed. Unfortunately this requires a lot more setup to call ConfiguredTargetFunction.computeDependencies correctly.

PiperOrigin-RevId: 428855026

src/main/java/com/google/devtools/build/lib/skyframe/ToolchainResolutionFunction.java

@@ -67,8 +67,7 @@ public UnloadedToolchainContext compute(SkyKey skyKey, Environment env)
     ToolchainContextKey key = (ToolchainContextKey) skyKey.argument();
 
     try {
-      UnloadedToolchainContextImpl.Builder builder =
-          UnloadedToolchainContextImpl.builder().setKey(key);
+      UnloadedToolchainContextImpl.Builder builder = UnloadedToolchainContextImpl.builder(key);
 
       // Determine the configuration being used.
       BuildConfigurationValue configuration =

src/main/java/com/google/devtools/build/lib/skyframe/UnloadedToolchainContextImpl.java

@@ -30,8 +30,13 @@
 @AutoValue
 public abstract class UnloadedToolchainContextImpl implements SkyValue, UnloadedToolchainContext {
 
-  public static Builder builder() {
-    return new AutoValue_UnloadedToolchainContextImpl.Builder();
+  public static Builder builder(ToolchainContextKey key) {
+    return new AutoValue_UnloadedToolchainContextImpl.Builder()
+        .setKey(key)
+        .setRequiredToolchainTypes(ImmutableSet.of())
+        .setRequestedLabelToToolchainType(ImmutableMap.of())
+        .setToolchainTypeToResolved(
+            ImmutableSetMultimap.<ToolchainTypeInfo, Label>builder().build());
   }
 
   /** Builder class to help create the {@link UnloadedToolchainContextImpl}. */

src/test/java/com/google/devtools/build/lib/analysis/ResolvedToolchainContextTest.java

@@ -54,8 +54,7 @@ public void load() throws Exception {
 
     // Create a static UnloadedToolchainContext.
     UnloadedToolchainContext unloadedToolchainContext =
-        UnloadedToolchainContextImpl.builder()
-            .setKey(toolchainContextKey)
+        UnloadedToolchainContextImpl.builder(toolchainContextKey)
             .setExecutionPlatform(linuxPlatform)
             .setTargetPlatform(linuxPlatform)
             .setRequiredToolchainTypes(ImmutableSet.of(testToolchainType))
@@ -107,8 +106,7 @@ public void load_aliasedToolchain() throws Exception {
 
     // Create a static UnloadedToolchainContext.
     UnloadedToolchainContext unloadedToolchainContext =
-        UnloadedToolchainContextImpl.builder()
-            .setKey(toolchainContextKey)
+        UnloadedToolchainContextImpl.builder(toolchainContextKey)
             .setExecutionPlatform(linuxPlatform)
             .setTargetPlatform(linuxPlatform)
             .setRequiredToolchainTypes(ImmutableSet.of(testToolchainType))
@@ -150,8 +148,7 @@ public void load_notToolchain() throws Exception {
 
     // Create a static UnloadedToolchainContext.
     UnloadedToolchainContext unloadedToolchainContext =
-        UnloadedToolchainContextImpl.builder()
-            .setKey(toolchainContextKey)
+        UnloadedToolchainContextImpl.builder(toolchainContextKey)
             .setExecutionPlatform(linuxPlatform)
             .setTargetPlatform(linuxPlatform)
             .setRequiredToolchainTypes(ImmutableSet.of(testToolchainType))
@@ -210,8 +207,7 @@ public void load_withTemplateVariables() throws Exception {
 
     // Create a static UnloadedToolchainContext.
     UnloadedToolchainContext unloadedToolchainContext =
-        UnloadedToolchainContextImpl.builder()
-            .setKey(toolchainContextKey)
+        UnloadedToolchainContextImpl.builder(toolchainContextKey)
             .setExecutionPlatform(linuxPlatform)
             .setTargetPlatform(linuxPlatform)
             .setRequiredToolchainTypes(ImmutableSet.of(variableToolchainType))

src/test/java/com/google/devtools/build/lib/skyframe/BUILD

@@ -258,6 +258,7 @@ java_test(
         "//src/main/java/com/google/devtools/build/lib/skyframe:transitive_traversal_value",
         "//src/main/java/com/google/devtools/build/lib/skyframe:tree_artifact_value",
         "//src/main/java/com/google/devtools/build/lib/skyframe:unloaded_toolchain_context",
+        "//src/main/java/com/google/devtools/build/lib/skyframe:unloaded_toolchain_context_impl",
         "//src/main/java/com/google/devtools/build/lib/skyframe:toolchain_context_key",
         "//src/main/java/com/google/devtools/build/lib/skyframe:workspace_info",
         "//src/main/java/com/google/devtools/build/lib/skyframe:workspace_name_value",

src/test/java/com/google/devtools/build/lib/skyframe/ConfigurationsForTargetsTest.java

@@ -19,6 +19,7 @@
 import com.google.common.collect.Collections2;
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.ImmutableSet;
 import com.google.common.collect.Iterables;
 import com.google.common.collect.Multimap;
 import com.google.devtools.build.lib.analysis.AliasProvider;
@@ -27,12 +28,17 @@
 import com.google.devtools.build.lib.analysis.Dependency;
 import com.google.devtools.build.lib.analysis.DependencyKind;
 import com.google.devtools.build.lib.analysis.DependencyResolver;
+import com.google.devtools.build.lib.analysis.PlatformOptions;
 import com.google.devtools.build.lib.analysis.TargetAndConfiguration;
+import com.google.devtools.build.lib.analysis.ToolchainCollection;
+import com.google.devtools.build.lib.analysis.ToolchainContext;
 import com.google.devtools.build.lib.analysis.config.BuildConfigurationValue;
 import com.google.devtools.build.lib.analysis.config.CompilationMode;
 import com.google.devtools.build.lib.analysis.config.ConfigurationResolver;
+import com.google.devtools.build.lib.analysis.platform.PlatformInfo;
 import com.google.devtools.build.lib.analysis.util.AnalysisMock;
 import com.google.devtools.build.lib.analysis.util.AnalysisTestCase;
+import com.google.devtools.build.lib.cmdline.Label;
 import com.google.devtools.build.lib.collect.nestedset.NestedSetBuilder;
 import com.google.devtools.build.lib.packages.Attribute;
 import com.google.devtools.build.lib.packages.RuleClassProvider;
@@ -47,7 +53,7 @@
 import com.google.devtools.build.skyframe.SkyKey;
 import com.google.devtools.build.skyframe.SkyValue;
 import java.util.List;
-import org.junit.Ignore;
+import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.JUnit4;
@@ -75,6 +81,10 @@
 @RunWith(JUnit4.class)
 public class ConfigurationsForTargetsTest extends AnalysisTestCase {
 
+  public static final Label TARGET_PLATFORM_LABEL =
+      Label.parseAbsoluteUnchecked("//platform:target");
+  public static final Label EXEC_PLATFORM_LABEL = Label.parseAbsoluteUnchecked("//platform:exec");
+
   /**
    * A mock {@link SkyFunction} that just calls {@link ConfiguredTargetFunction#computeDependencies}
    * and returns its results.
@@ -118,18 +128,35 @@ static final class Value implements SkyValue {
     public SkyValue compute(SkyKey skyKey, Environment env)
         throws EvalException, InterruptedException {
       try {
+        TargetAndConfiguration targetAndConfiguration = (TargetAndConfiguration) skyKey.argument();
+        // Set up the toolchain context so that exec transitions resolve properly.
+        ToolchainCollection<ToolchainContext> toolchainContexts =
+            ToolchainCollection.builder()
+                .addDefaultContext(
+                    UnloadedToolchainContextImpl.builder(
+                            ToolchainContextKey.key()
+                                .toolchainTypes(ImmutableSet.of())
+                                .configurationKey(
+                                    targetAndConfiguration.getConfiguration().getKey())
+                                .build())
+                        .setTargetPlatform(
+                            PlatformInfo.builder().setLabel(TARGET_PLATFORM_LABEL).build())
+                        .setExecutionPlatform(
+                            PlatformInfo.builder().setLabel(EXEC_PLATFORM_LABEL).build())
+                        .build())
+                .build();
         OrderedSetMultimap<DependencyKind, ConfiguredTargetAndData> depMap =
             ConfiguredTargetFunction.computeDependencies(
                 new ConfiguredTargetFunction.ComputeDependenciesState(),
                 /*transitivePackagesForPackageRootResolution=*/ null,
                 /*transitiveRootCauses=*/ NestedSetBuilder.stableOrder(),
                 env,
                 new SkyframeDependencyResolver(env),
-                (TargetAndConfiguration) skyKey.argument(),
+                targetAndConfiguration,
                 ImmutableList.of(),
                 ImmutableMap.of(),
-                /*toolchainContexts=*/ null,
-                /*useToolchainTransition=*/ false,
+                toolchainContexts,
+                /*useToolchainTransition=*/ true,
                 stateProvider.lateBoundRuleClassProvider(),
                 stateProvider.lateBoundHostConfig());
         return env.valuesMissing() ? null : new Value(depMap);
@@ -243,6 +270,15 @@ protected List<ConfiguredTarget> getConfiguredDeps(ConfiguredTarget target, Stri
         String.format("Couldn't find attribute %s for label %s", attrName, targetLabel));
   }
 
+  @Before
+  public void setUp() throws Exception {
+    scratch.file(
+        "platform/BUILD",
+        // Add basic target and exec platforms for testing.
+        "platform(name = 'target')",
+        "platform(name = 'exec')");
+  }
+
   @Test
   public void nullConfiguredDepsHaveExpectedConfigs() throws Exception {
     scratch.file(
@@ -275,23 +311,24 @@ public void targetDeps() throws Exception {
    * contexts.
    */
   @Test
-  @Ignore("b/219749974")
-  public void hostDeps() throws Exception {
+  public void execDeps() throws Exception {
     scratch.file(
-        "a/host_rule.bzl",
-        "host_rule = rule(",
+        "a/exec_rule.bzl",
+        "exec_rule = rule(",
         "  implementation = lambda ctx: [],",
-        "  attrs = {'tools': attr.label_list(cfg = 'host')},",
+        "  attrs = {'tools': attr.label_list(cfg = 'exec')},",
         ")");
     scratch.file(
         "a/BUILD",
-        "load('//a:host_rule.bzl', 'host_rule')",
-        "cc_binary(name = 'host_tool', srcs = ['host_tool.cc'])",
-        "host_rule(name = 'gen', tools = [':host_tool'])");
+        "load('//a:exec_rule.bzl', 'exec_rule')",
+        "sh_binary(name = 'exec_tool', srcs = ['exec_tool.sh'])",
+        "exec_rule(name = 'gen', tools = [':exec_tool'])");
 
     ConfiguredTarget toolDep = Iterables.getOnlyElement(getConfiguredDeps("//a:gen", "tools"));
-
-    assertThat(getConfiguration(toolDep).isHostConfiguration()).isTrue();
+    BuildConfigurationValue toolConfiguration = getConfiguration(toolDep);
+    assertThat(toolConfiguration.isToolConfiguration()).isTrue();
+    assertThat(toolConfiguration.getOptions().get(PlatformOptions.class).platforms)
+        .containsExactly(EXEC_PLATFORM_LABEL);
   }
 
   @Test