From c4e9ae3f922fe4397c85353e35d6ca8a451d031c Mon Sep 17 00:00:00 2001
From: David Ostrovsky <david@ostrovsky.org>
Date: Tue, 13 Dec 2016 23:02:09 +0100
Subject: [PATCH] Buck: Mark auto value annotation processors as safe

This diff: [1] allows marking certain annotation processors as "safe"
via a `.buckconfig` item, and then reuses class loaders when only
"safe" annotation processors are involved.

This results in a 50% reduction in annotation processing time (42%
reduction in `javac` time) in a large test build, as measured by Buck
tracing.

[1] https://github.com/facebook/buck/commit/97a8dc08acce6b0bf04820f2d29bc1fb85957ad1

Change-Id: I76c82fbc9876a4acd48ba0cc83bfed50109f8be8
---
 .buckconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.buckconfig b/.buckconfig
index 60fd02ac54..11cfe37d27 100644
--- a/.buckconfig
+++ b/.buckconfig
@@ -19,6 +19,7 @@
 
 [java]
   jar_spool_mode = direct_to_jar
+  safe_annotation_processors = com.google.auto.value.processor.AutoAnnotationProcessor,com.google.auto.value.processor.AutoValueProcessor
   src_roots = java, resources, src
   source_level = 8
   target_level = 8