1 files changed, 112 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/rules/objc/AppleStaticLibraryRule.java b/src/main/java/com/google/devtools/build/lib/rules/objc/AppleStaticLibraryRule.java
new file mode 100644
index 0000000000..5c78165f21
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/rules/objc/AppleStaticLibraryRule.java
@@ -0,0 +1,112 @@
+// 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.objc;
+
+import static com.google.devtools.build.lib.packages.Attribute.attr;
+import static com.google.devtools.build.lib.packages.BuildType.LABEL_LIST;
+import static com.google.devtools.build.lib.packages.ImplicitOutputsFunction.fromTemplates;
+
+import com.google.common.collect.ImmutableList;
+import com.google.devtools.build.lib.analysis.BaseRuleClasses;
+import com.google.devtools.build.lib.analysis.RuleDefinition;
+import com.google.devtools.build.lib.analysis.RuleDefinitionEnvironment;
+import com.google.devtools.build.lib.analysis.TransitiveInfoProvider;
+import com.google.devtools.build.lib.packages.ImplicitOutputsFunction;
+import com.google.devtools.build.lib.packages.ImplicitOutputsFunction.SafeImplicitOutputsFunction;
+import com.google.devtools.build.lib.packages.RuleClass;
+import com.google.devtools.build.lib.packages.RuleClass.Builder;
+import com.google.devtools.build.lib.rules.apple.AppleConfiguration;
+import com.google.devtools.build.lib.rules.cpp.CppConfiguration;
+
+/**
+ * Rule definition for apple_static_library.
+ */
+public class AppleStaticLibraryRule implements RuleDefinition {
+
+  /**
+   * Template for the fat archive output (using Apple's "lipo" tool to combine .a archive files of
+   * multiple architectures).
+   */
+  static final SafeImplicitOutputsFunction LIPO_ARCHIVE = fromTemplates("%{name}_lipo.a");
+
+  @Override
+  public RuleClass build(Builder builder, RuleDefinitionEnvironment env) {
+    MultiArchSplitTransitionProvider splitTransitionProvider =
+        new MultiArchSplitTransitionProvider();
+
+    return builder
+        .requiresConfigurationFragments(
+            ObjcConfiguration.class, J2ObjcConfiguration.class, AppleConfiguration.class,
+            CppConfiguration.class)
+        .override(builder.copy("deps").cfg(splitTransitionProvider))
+        /* <!-- #BLAZE_RULE(apple_static_library).ATTRIBUTE(avoid_deps) -->
+        <p>A list of targets which should not be included (nor their transitive dependencies
+        included) in the outputs of this rule -- even if they are otherwise transitively depended
+        on via the <code>deps</code> attribute.</p>
+
+        <p>This attribute effectively serves to remove portions of the dependency tree from a static
+        library, and is useful most commonly in scenarios where static libraries depend on each
+        other.</p>
+        
+        <p>That is, suppose static libraries X and C are typically distributed to consumers
+        separately. C is a very-common base library, and X contains less-common functionality; X
+        depends on C, such that applications seeking to import library X must also import library
+        C. The target describing X would set C's target in <code>avoid_deps</code>. In this way,
+        X can depend on C without also containing C. Without this <code>avoid_deps</code> usage,
+        an application importing both X and C would have duplicate symbols for C.</p>
+        <!-- #END_BLAZE_RULE.ATTRIBUTE -->*/
+        .add(
+            attr("avoid_deps", LABEL_LIST)
+                .direct_compile_time_input()
+                .allowedRuleClasses(ObjcRuleClasses.CompilingRule.ALLOWED_DEPS_RULE_CLASSES)
+                .mandatoryNativeProviders(
+                    ImmutableList.<Class<? extends TransitiveInfoProvider>>of(ObjcProvider.class))
+                .cfg(splitTransitionProvider)
+                .allowedFileTypes())
+        /*<!-- #BLAZE_RULE(apple_static_library).IMPLICIT_OUTPUTS -->
+        <ul>
+          <li><code><var>name</var>_lipo.a</code>: a 'lipo'ed archive file. All transitive
+          dependencies and <code>srcs</code> are linked, minus all transitive dependencies
+          specified in <code>avoid_deps</code>.</li>
+        </ul>
+        <!-- #END_BLAZE_RULE.IMPLICIT_OUTPUTS -->*/
+        .setImplicitOutputsFunction(ImplicitOutputsFunction.fromFunctions(LIPO_ARCHIVE))
+        .build();
+  }
+
+  @Override
+  public Metadata getMetadata() {
+    return RuleDefinition.Metadata.builder()
+        .name("apple_static_library")
+        .factoryClass(AppleStaticLibrary.class)
+        .ancestors(BaseRuleClasses.BaseRule.class, ObjcRuleClasses.LinkingRule.class,
+            ObjcRuleClasses.MultiArchPlatformRule.class, ObjcRuleClasses.SimulatorRule.class)
+        .build();
+  }
+}
+
+/*<!-- #BLAZE_RULE (NAME = apple_static_library, TYPE = BINARY, FAMILY = Objective-C) -->
+
+<p>This rule produces single- or multi-architecture ("fat") Objective-C statically-linked libraries,
+typically used in creating static Apple Frameworks for distribution and re-use in 
+multiple extensions or applications.</p>
+
+<p>The <code>lipo</code> tool is used to combine files of multiple architectures; a build flag
+controls which architectures are targeted. The build flag examined depends on the
+<code>platform_type</code> attribute for this rule (and is described in its documentation).</p>
+
+${IMPLICIT_OUTPUTS}
+
+<!-- #END_BLAZE_RULE -->*/