Adds internal data binding support to Bazel, although this

is not yet exposed at the user level.
(https://developer.android.com/topic/libraries/data-binding/index.html).

See comments in DataBinding.java for the high-level overview of
how this works.

This does not yet work with
--experimental_use_parallel_android_resource_processing.

Exposing this at the user level additionally requires:

1) making the data binding support libraries available at an
expected place in the depot

2) Opting in android_binary / android_library rules through a new
"enable_data_binding" attribute.

--
MOS_MIGRATED_REVID=139797558

1 files changed, 16 insertions, 0 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/rules/android/AndroidResourcesProcessorBuilder.java b/src/main/java/com/google/devtools/build/lib/rules/android/AndroidResourcesProcessorBuilder.java
index 45ee4685f5..bbbc9b052a 100644
--- a/src/main/java/com/google/devtools/build/lib/rules/android/AndroidResourcesProcessorBuilder.java
+++ b/src/main/java/com/google/devtools/build/lib/rules/android/AndroidResourcesProcessorBuilder.java
@@ -83,6 +83,7 @@ public class AndroidResourcesProcessorBuilder {
   private String applicationId;
   private String versionName;
   private Artifact symbolsTxt;
+  private Artifact dataBindingInfoZip;
 
   private Artifact manifestOut;
   private Artifact mergedResourcesOut;
@@ -107,6 +108,16 @@ public class AndroidResourcesProcessorBuilder {
     return this;
   }
 
+  /**
+   * The output zip for resource-processed data binding expressions (i.e. a zip of .xml files).
+   * If null, data binding processing is skipped (and data binding expressions aren't allowed in
+   * layout resources).
+   */
+  public AndroidResourcesProcessorBuilder setDataBindingInfoZip(Artifact zip) {
+    this.dataBindingInfoZip = zip;
+    return this;
+  }
+
   public AndroidResourcesProcessorBuilder withDependencies(ResourceDependencies resourceDeps) {
     this.dependencies = resourceDeps;
     return this;
@@ -287,6 +298,11 @@ public class AndroidResourcesProcessorBuilder {
       builder.add("--applicationId").add(applicationId);
     }
 
+    if (dataBindingInfoZip != null) {
+      builder.addExecPath("--dataBindingInfoOut", dataBindingInfoZip);
+      outs.add(dataBindingInfoZip);
+    }
+
     if (!Strings.isNullOrEmpty(customJavaPackage)) {
       // Sets an alternative java package for the generated R.java
       // this allows android rules to generate resources outside of the java{,tests} tree.