Update from Google.

--
MOE_MIGRATED_REVID=85702957

2 files changed, 141 insertions, 0 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/rules/filegroup/Filegroup.java b/src/main/java/com/google/devtools/build/lib/rules/filegroup/Filegroup.java
new file mode 100644
index 0000000000..cb297d8d0e
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/rules/filegroup/Filegroup.java
@@ -0,0 +1,103 @@
+// Copyright 2014 Google Inc. 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.rules.filegroup;
+
+import com.google.devtools.build.lib.actions.Actions;
+import com.google.devtools.build.lib.actions.Artifact;
+import com.google.devtools.build.lib.analysis.CompilationHelper;
+import com.google.devtools.build.lib.analysis.ConfiguredTarget;
+import com.google.devtools.build.lib.analysis.MiddlemanProvider;
+import com.google.devtools.build.lib.analysis.RuleConfiguredTarget.Mode;
+import com.google.devtools.build.lib.analysis.RuleConfiguredTargetBuilder;
+import com.google.devtools.build.lib.analysis.RuleContext;
+import com.google.devtools.build.lib.analysis.Runfiles;
+import com.google.devtools.build.lib.analysis.RunfilesProvider;
+import com.google.devtools.build.lib.collect.nestedset.NestedSet;
+import com.google.devtools.build.lib.collect.nestedset.NestedSetBuilder;
+import com.google.devtools.build.lib.collect.nestedset.Order;
+import com.google.devtools.build.lib.packages.Type;
+import com.google.devtools.build.lib.rules.RuleConfiguredTargetFactory;
+import com.google.devtools.build.lib.rules.test.InstrumentedFilesCollector;
+import com.google.devtools.build.lib.rules.test.InstrumentedFilesCollector.InstrumentationSpec;
+import com.google.devtools.build.lib.rules.test.InstrumentedFilesProvider;
+import com.google.devtools.build.lib.rules.test.InstrumentedFilesProviderImpl;
+import com.google.devtools.build.lib.util.FileTypeSet;
+import com.google.devtools.build.lib.vfs.PathFragment;
+
+import java.util.Iterator;
+
+/**
+ * ConfiguredTarget for "filegroup".
+ */
+public class Filegroup implements RuleConfiguredTargetFactory {
+
+  @Override
+  public ConfiguredTarget create(RuleContext ruleContext) {
+    NestedSet<Artifact> filesToBuild = NestedSetBuilder.wrap(Order.STABLE_ORDER,
+        ruleContext.getPrerequisiteArtifacts("srcs", Mode.TARGET).list());
+    NestedSet<Artifact> middleman = CompilationHelper.getAggregatingMiddleman(
+        ruleContext, Actions.escapeLabel(ruleContext.getLabel()), filesToBuild);
+
+    InstrumentedFilesCollector instrumentedFilesCollector =
+        new InstrumentedFilesCollector(ruleContext,
+            // what do *we* know about whether this is a source file or not
+            new InstrumentationSpec(FileTypeSet.ANY_FILE, "srcs", "deps", "data"),
+            InstrumentedFilesCollector.NO_METADATA_COLLECTOR, filesToBuild);
+
+    RunfilesProvider runfilesProvider = RunfilesProvider.withData(
+        new Runfiles.Builder()
+            .addRunfiles(ruleContext, RunfilesProvider.DEFAULT_RUNFILES)
+            .build(),
+        // If you're visiting a filegroup as data, then we also visit its data as data.
+        new Runfiles.Builder().addTransitiveArtifacts(filesToBuild)
+            .addDataDeps(ruleContext).build());
+
+    return new RuleConfiguredTargetBuilder(ruleContext)
+        .add(RunfilesProvider.class, runfilesProvider)
+        .setFilesToBuild(filesToBuild)
+        .setRunfilesSupport(null, getExecutable(filesToBuild))
+        .add(InstrumentedFilesProvider.class, new InstrumentedFilesProviderImpl(
+            instrumentedFilesCollector))
+        .add(MiddlemanProvider.class, new MiddlemanProvider(middleman))
+        .add(FilegroupPathProvider.class,
+            new FilegroupPathProvider(getFilegroupPath(ruleContext)))
+        .build();
+  }
+
+  /*
+   * Returns the single executable output of this filegroup. Returns
+   * {@code null} if there are multiple outputs or the single output is not
+   * considered an executable.
+   */
+  private Artifact getExecutable(NestedSet<Artifact> filesToBuild) {
+    Iterator<Artifact> it = filesToBuild.iterator();
+    if (it.hasNext()) {
+      Artifact out = it.next();
+      if (!it.hasNext()) {
+        return out;
+      }
+    }
+    return null;
+  }
+
+  private PathFragment getFilegroupPath(RuleContext ruleContext) {
+    String attr = ruleContext.attributes().get("path", Type.STRING);
+    if (attr.isEmpty()) {
+      return PathFragment.EMPTY_FRAGMENT;
+    } else {
+      return ruleContext.getLabel().getPackageFragment().getRelative(attr);
+    }
+  }
+}
diff --git a/src/main/java/com/google/devtools/build/lib/rules/filegroup/FilegroupPathProvider.java b/src/main/java/com/google/devtools/build/lib/rules/filegroup/FilegroupPathProvider.java
new file mode 100644
index 0000000000..370be07cae
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/rules/filegroup/FilegroupPathProvider.java
@@ -0,0 +1,38 @@
+// Copyright 2014 Google Inc. 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.rules.filegroup;
+
+import com.google.devtools.build.lib.analysis.TransitiveInfoProvider;
+import com.google.devtools.build.lib.concurrent.ThreadSafety.Immutable;
+import com.google.devtools.build.lib.vfs.PathFragment;
+
+/**
+ * A transitive info provider for dependent targets to query {@code path} attributes.
+ */
+@Immutable
+public final class FilegroupPathProvider implements TransitiveInfoProvider {
+  private final PathFragment pathFragment;
+
+  public FilegroupPathProvider(PathFragment pathFragment) {
+    this.pathFragment = pathFragment;
+  }
+
+  /**
+   * Returns the value of the {@code path} attribute or the empty fragment if it is not present.
+   */
+  public PathFragment getFilegroupPath() {
+    return pathFragment;
+  }
+}