From bad89e5e5b171a71e42d7c738ec97a39747e4318 Mon Sep 17 00:00:00 2001
From: Mathew Inwood <mathewi@google.com>
Date: Thu, 28 Jun 2018 14:12:10 +0100
Subject: Processor for @UnsupportedAppUsage annotations.

The processor outputs unsupportedappusage_index.csv, containing source
position info for every@UnsupportedAppUsage annotation processed. It is a
mapping of dex signature to the source postion of the annotation on that
signature. It is used as input for scripts which update the annotations.

We include a META-INF file which causes the compiler to automatically
pick up the annotation processor. Otherwise we would need to explicitly
specify the processor with a -processor flag to javac.

We create a new build target for just the @UnsupportedAppUsage annotation
and the @IntDef annotation (which it depends on) so that the processor can
also depend on that directly.

The processor only runs on a new build target framework-annotation-proc
so that it is not invoked as part of a regular build. This is done so
that we don't slow down peoples builds: Soong does not support annotation
processors when javac sharding is in use. This workaround can be removed
once b/77284273 is fixed.

Test: m framework-annotation-proc
Bug: 113853502

Change-Id: Ie9cd5a90ddf7a51f6035e849703fc39ad9127557
---
 Android.bp | 34 ++++++++++++++++++++++++++++++----
 1 file changed, 30 insertions(+), 4 deletions(-)

(limited to 'Android.bp')

diff --git a/Android.bp b/Android.bp
index 70438d200cb7..dda318b38d0d 100644
--- a/Android.bp
+++ b/Android.bp
@@ -25,8 +25,8 @@
 //
 // READ ME: ########################################################
 
-java_library {
-    name: "framework",
+java_defaults {
+    name: "framework-defaults",
     installable: true,
 
     srcs: [
@@ -695,12 +695,38 @@ java_library {
         "libmedia2_jni",
     ],
 
-    javac_shard_size: 150,
-
     dxflags: [
         "--core-library",
         "--multi-dex",
     ],
+
+}
+
+java_library {
+    name: "framework",
+    defaults: ["framework-defaults"],
+    javac_shard_size: 150,
+}
+
+java_library {
+    name: "framework-annotation-proc",
+    defaults: ["framework-defaults"],
+    // Use UsedByApps annotation processor
+    annotation_processors: ["unsupportedappusage-annotation-processor"],
+    // b/25860419: annotation processors must be explicitly specified for grok
+    annotation_processor_classes: [
+        "android.processor.unsupportedappusage.UsedByAppsProcessor",
+    ],
+}
+
+// A host library including just UnsupportedAppUsage.java so that the annotation
+// processor can also use this annotation.
+java_library_host {
+    name: "unsupportedappusage-annotation",
+    srcs: [
+        "core/java/android/annotation/IntDef.java",
+        "core/java/android/annotation/UnsupportedAppUsage.java",
+    ],
 }
 
 // A temporary build target that is conditionally included on the bootclasspath if
-- 
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