Document aar_import in Bazel.

Fixes https://github.com/bazelbuild/bazel/issues/564.

RELNOTES: aar_import rule is now documented.

--
PiperOrigin-RevId: 141843994
MOS_MIGRATED_REVID=141843994

2 files changed, 33 insertions, 1 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/bazel/rules/android/BazelAarImportRule.java b/src/main/java/com/google/devtools/build/lib/bazel/rules/android/BazelAarImportRule.java
index fc64a5c968..d55bf7a600 100644
--- a/src/main/java/com/google/devtools/build/lib/bazel/rules/android/BazelAarImportRule.java
+++ b/src/main/java/com/google/devtools/build/lib/bazel/rules/android/BazelAarImportRule.java
@@ -40,3 +40,29 @@ public final class BazelAarImportRule implements RuleDefinition {
         .build();
   }
 }
+
+/*<!-- #BLAZE_RULE (NAME = aar_import, TYPE = LIBRARY, FAMILY = Android) -->
+
+<p>
+  This rule allows the use of <code>.aar</code> files as libraries for
+  <code><a href="${link android_library}">android_library</a></code> and
+  <code><a href="${link android_binary}">android_binary</a></code> rules.
+</p>
+
+<h4 id="aar_import_examples">Examples</h4>
+
+<pre class="code">
+    aar_import(
+        name = "google-vr-sdk",
+        aar = "gvr-android-sdk/libraries/sdk-common-1.10.0.aar",
+    )
+
+    android_binary(
+        name = "app",
+        manifest = "AndroidManifest.xml",
+        srcs = glob(["**.java"]),
+        deps = [":google-vr-sdk"],
+    )
+</pre>
+
+<!-- #END_BLAZE_RULE -->*/
diff --git a/src/main/java/com/google/devtools/build/lib/rules/android/AarImportBaseRule.java b/src/main/java/com/google/devtools/build/lib/rules/android/AarImportBaseRule.java
index 1e9e28c457..6abf8ed35e 100644
--- a/src/main/java/com/google/devtools/build/lib/rules/android/AarImportBaseRule.java
+++ b/src/main/java/com/google/devtools/build/lib/rules/android/AarImportBaseRule.java
@@ -35,10 +35,16 @@ public class AarImportBaseRule implements RuleDefinition {
   @Override
   public RuleClass build(Builder builder, RuleDefinitionEnvironment environment) {
     return builder
-        .setUndocumented()
+        /* <!-- #BLAZE_RULE($aar_import_base).ATTRIBUTE(aar) -->
+        The <code>.aar</code> file to provide to the Android targets that depend on this target.
+        <!-- #END_BLAZE_RULE.ATTRIBUTE --> */
         .add(attr("aar", LABEL)
             .mandatory()
             .allowedFileTypes(FileType.of(".aar")))
+        /* <!-- #BLAZE_RULE(aar_import).ATTRIBUTE(exports) -->
+        Target to export to rules that depend on this rule.
+        See <a href="${link java_library.exports}">java_library.exports.
+        <!-- #END_BLAZE_RULE.ATTRIBUTE --> */
         .add(attr("exports", LABEL_LIST)
             .allowedRuleClasses("aar_import", "java_import")
             .allowedFileTypes()