From 9f20fabc69b43be38f717065667c50e1ff616efa Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?To=CC=83nis=20Tiigi?= <tonistiigi@gmail.com>
Date: Thu, 22 Sep 2016 14:38:00 -0700
Subject: [PATCH] Implement build cache based on history array

Based on work by KJ Tsanaktsidis

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
Signed-off-by: KJ Tsanaktsidis <kjtsanaktsidis@gmail.com>
---
 image_build.go | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/image_build.go b/image_build.go
index a84bf57821..0094602a6e 100644
--- a/image_build.go
+++ b/image_build.go
@@ -110,6 +110,13 @@ func imageBuildOptionsToQuery(options types.ImageBuildOptions) (url.Values, erro
 		return query, err
 	}
 	query.Set("labels", string(labelsJSON))
+
+	cacheFromJSON, err := json.Marshal(options.CacheFrom)
+	if err != nil {
+		return query, err
+	}
+	query.Set("cachefrom", string(cacheFromJSON))
+
 	return query, nil
 }