From fc0d37f881b90aa9db1138369b6388acdbde517a Mon Sep 17 00:00:00 2001
From: Brad Rydzewski <brad.rydzewski@gmail.com>
Date: Thu, 2 Jul 2015 15:10:34 -0700
Subject: [PATCH] added tty flag

---
 shared/build/build.go         | 1 +
 shared/build/script/docker.go | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/shared/build/build.go b/shared/build/build.go
index cb2f60fa6..0a0265ab4 100644
--- a/shared/build/build.go
+++ b/shared/build/build.go
@@ -322,6 +322,7 @@ func (b *Builder) run() error {
 		AttachStdin:  false,
 		AttachStdout: true,
 		AttachStderr: true,
+		Tty:          script.DockerTty(b.Build.Docker),
 	}
 
 	// configure if Docker should run in privileged mode
diff --git a/shared/build/script/docker.go b/shared/build/script/docker.go
index c06e9e4d2..a61967922 100644
--- a/shared/build/script/docker.go
+++ b/shared/build/script/docker.go
@@ -43,7 +43,7 @@ func DockerHostname(d *Docker) string {
 
 // DockerTty returns true if the build
 // should allocate a pseudo tty
-func DockerTty(d *Docker) string {
+func DockerTty(d *Docker) bool {
 	if d == nil {
 		return false
 	}