From 3de1827b21413c6504ac140087cc1b0cb9175bcd Mon Sep 17 00:00:00 2001
From: Amir Zarrinkafsh <nightah@me.com>
Date: Thu, 9 Apr 2020 14:46:04 +1000
Subject: [PATCH] [Buildkite] Control clean builds with agent metadata (#840)

This is to optimise build times at the sacrifice of disk space/clean up tasks.
---
 .buildkite/hooks/pre-exit | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/.buildkite/hooks/pre-exit b/.buildkite/hooks/pre-exit
index 6a1767f98..8224e4146 100755
--- a/.buildkite/hooks/pre-exit
+++ b/.buildkite/hooks/pre-exit
@@ -2,5 +2,7 @@
 
 set +u
 
-echo "--- :docker: Clean environment"
-docker system prune -af --volumes
\ No newline at end of file
+if [[ $BUILDKITE_AGENT_META_DATA_CLEANBUILD != "false" ]]; then
+  echo "--- :docker: Clean environment"
+  docker system prune -af --volumes
+fi
\ No newline at end of file