1 files changed, 162 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/rules/cpp/ArtifactCategory.java b/src/main/java/com/google/devtools/build/lib/rules/cpp/ArtifactCategory.java
new file mode 100644
index 0000000000..04036faf6f
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/rules/cpp/ArtifactCategory.java
@@ -0,0 +1,162 @@
+// Copyright 2016 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.rules.cpp;
+
+import com.google.common.annotations.VisibleForTesting;
+import com.google.common.collect.ImmutableMap;
+import com.google.devtools.build.lib.actions.Artifact;
+import com.google.devtools.build.lib.analysis.RuleContext;
+import com.google.devtools.build.lib.vfs.PathFragment;
+
+/**
+ * A category of artifacts that are candidate input/output to an action, for which the toolchain can
+ * select a single artifact.
+ */
+public enum ArtifactCategory {
+  STATIC_LIBRARY {
+    @Override
+    public String getCategoryName() {
+      return STATIC_LIBRARY_CATEGORY_NAME;
+    }
+
+    @Override
+    public ImmutableMap<String, String> getTemplateVariables(RuleContext ruleContext) {
+      return ImmutableMap.of("base_name", ruleContext.getLabel().getName());
+    }
+  },
+
+  PIC_STATIC_LIBRARY {
+    @Override
+    public String getCategoryName() {
+      return PIC_STATIC_LIBRARY_CATEGORY_NAME;
+    }
+
+    @Override
+    public ImmutableMap<String, String> getTemplateVariables(RuleContext ruleContext) {
+      return ImmutableMap.of("base_name", ruleContext.getLabel().getName());
+    }
+  },
+
+  ALWAYS_LINK_STATIC_LIBRARY {
+    @Override
+    public String getCategoryName() {
+      return ALWAYS_LINK_STATIC_LIBRARY_CATEGORY_NAME;
+    }
+
+    @Override
+    public ImmutableMap<String, String> getTemplateVariables(RuleContext ruleContext) {
+      return ImmutableMap.of("base_name", ruleContext.getLabel().getName());
+    }
+  },
+
+  ALWAYS_LINK_PIC_STATIC_LIBRARY {
+    @Override
+    public String getCategoryName() {
+      return ALWAYS_LINK_PIC_STATIC_LIBRARY_CATEGORY_NAME;
+    }
+
+    @Override
+    public ImmutableMap<String, String> getTemplateVariables(RuleContext ruleContext) {
+      return ImmutableMap.of("base_name", ruleContext.getLabel().getName());
+    }
+  },
+
+  DYNAMIC_LIBRARY {
+    @Override
+    public String getCategoryName() {
+      return DYNAMIC_LIBRARY_CATEGORY_NAME;
+    }
+
+    @Override
+    public ImmutableMap<String, String> getTemplateVariables(RuleContext ruleContext) {
+      return ImmutableMap.of("base_name", ruleContext.getLabel().getName());
+    }
+  },
+
+  EXECUTABLE {
+    @Override
+    public String getCategoryName() {
+      return EXECUTABLE_CATEGORY_NAME;
+    }
+
+    @Override
+    public ImmutableMap<String, String> getTemplateVariables(RuleContext ruleContext) {
+      return ImmutableMap.of("base_name", ruleContext.getLabel().getName());
+    }
+  },
+
+  INTERFACE {
+    @Override
+    public String getCategoryName() {
+      return INTERFACE_CATEGORY_NAME;
+    }
+
+    @Override
+    public ImmutableMap<String, String> getTemplateVariables(RuleContext ruleContext) {
+      return ImmutableMap.of("base_name", ruleContext.getLabel().getName());
+    }
+  },
+
+  DEBUG_SYMBOLS {
+    @Override
+    public String getCategoryName() {
+      return DEBUG_SYMBOL_CATEGORY_NAME;
+    }
+
+    @Override
+    public ImmutableMap<String, String> getTemplateVariables(RuleContext ruleContext) {
+      return ImmutableMap.of();
+    }
+  };
+
+  /** Error for template evaluation failure. */
+  @VisibleForTesting
+  public static final String TEMPLATE_EVAL_FAILURE =
+      "Error evaluating file name pattern for artifact category %s: %s";
+
+  @VisibleForTesting public static final String STATIC_LIBRARY_CATEGORY_NAME = "static_library";
+
+  @VisibleForTesting
+  public static final String PIC_STATIC_LIBRARY_CATEGORY_NAME = "pic_static_library";
+
+  @VisibleForTesting
+  public static final String ALWAYS_LINK_STATIC_LIBRARY_CATEGORY_NAME = "alwayslink_static_library";
+
+  @VisibleForTesting
+  public static final String ALWAYS_LINK_PIC_STATIC_LIBRARY_CATEGORY_NAME =
+      "alwayslink_pic_static_library";
+
+  @VisibleForTesting public static final String DYNAMIC_LIBRARY_CATEGORY_NAME = "dynamic_library";
+  @VisibleForTesting public static final String EXECUTABLE_CATEGORY_NAME = "executable";
+  @VisibleForTesting public static final String INTERFACE_CATEGORY_NAME = "interface_library";
+  private static final String DEBUG_SYMBOL_CATEGORY_NAME = "debug_symbol";
+
+  /** Returns the name of the category. */
+  public abstract String getCategoryName();
+
+  /** Returns an artifact given a templated name. */
+  public Artifact getArtifactForName(String artifactName, RuleContext ruleContext) {
+    PathFragment name =
+        new PathFragment(ruleContext.getLabel().getName()).replaceName(artifactName);
+    return ruleContext.getPackageRelativeArtifact(
+        name, ruleContext.getConfiguration().getBinDirectory());
+  }
+
+  /**
+   * Returns a map of candidate template variables to their values. For example, the entry (foo,
+   * bar) indicates that the crosstool artifact name "library_%{foo}.extension" should be templated
+   * to "library_bar.extension".
+   */
+  public abstract ImmutableMap<String, String> getTemplateVariables(RuleContext ruleContext);
+}