From d08b27fa9701fecfdb69e1b0d1ac2459efc2129b Mon Sep 17 00:00:00 2001
From: Han-Wen Nienhuys <hanwen@google.com>
Date: Wed, 25 Feb 2015 16:45:20 +0100
Subject: Update from Google.

--
MOE_MIGRATED_REVID=85702957
---
 .../devtools/build/lib/analysis/FileProvider.java  | 76 ++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 src/main/java/com/google/devtools/build/lib/analysis/FileProvider.java

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

diff --git a/src/main/java/com/google/devtools/build/lib/analysis/FileProvider.java b/src/main/java/com/google/devtools/build/lib/analysis/FileProvider.java
new file mode 100644
index 0000000000..893f211d3a
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/analysis/FileProvider.java
@@ -0,0 +1,76 @@
+// 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.analysis;
+
+import com.google.devtools.build.lib.actions.Artifact;
+import com.google.devtools.build.lib.collect.nestedset.NestedSet;
+import com.google.devtools.build.lib.concurrent.ThreadSafety.Immutable;
+import com.google.devtools.build.lib.syntax.Label;
+import com.google.devtools.build.lib.syntax.SkylarkCallable;
+import com.google.devtools.build.lib.syntax.SkylarkModule;
+
+import javax.annotation.Nullable;
+
+/**
+ * A representation of the concept "this transitive info provider builds these files".
+ *
+ * <p>Every transitive info collection contains at least this provider.
+ */
+@Immutable
+@SkylarkModule(name = "file_provider", doc = "An interface for rules that provide files.")
+public final class FileProvider implements TransitiveInfoProvider {
+
+  @Nullable private final Label label;
+  private final NestedSet<Artifact> filesToBuild;
+
+  public FileProvider(@Nullable Label label, NestedSet<Artifact> filesToBuild) {
+    this.label = label;
+    this.filesToBuild = filesToBuild;
+  }
+
+  /**
+   * Returns the label that is associated with this piece of information.
+   *
+   * <p>This is usually the label of the target that provides the information.
+   */
+  @SkylarkCallable(name = "label", doc = "", structField = true)
+  public Label getLabel() {
+    if (label == null) {
+      throw new UnsupportedOperationException();
+    }
+    return label;
+  }
+
+  /**
+   * Returns the set of artifacts that are the "output" of this rule.
+   *
+   * <p>The term "output" is somewhat hazily defined; it is vaguely the set of files that are
+   * passed on to dependent rules that list the rule in their {@code srcs} attribute and the
+   * set of files that are built when a rule is mentioned on the command line. It does
+   * <b>not</b> include the runfiles; that is the bailiwick of {@code FilesToRunProvider}.
+   *
+   * <p>Note that the above definition is somewhat imprecise; in particular, when a rule is
+   * mentioned on the command line, some other files are also built
+   * {@code TopLevelArtifactHelper} and dependent rules are free to filter this set of artifacts
+   * e.g. based on their extension.
+   *
+   * <p>Also, some rules may generate artifacts that are not listed here by way of defining other
+   * implicit targets, for example, deploy jars.
+   */
+  @SkylarkCallable(name = "files_to_build", doc = "", structField = true)
+  public NestedSet<Artifact> getFilesToBuild() {
+    return filesToBuild;
+  }
+}
-- 
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