From 9e2d69fb974fea2307798785809902832463edd3 Mon Sep 17 00:00:00 2001
From: Matthew Hooker <mwhooker@gmail.com>
Date: Sat, 21 Jan 2017 23:50:24 -0800
Subject: [PATCH] builder/docker: create export dir if needed

---
 builder/docker/step_export.go | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/builder/docker/step_export.go b/builder/docker/step_export.go
index 6fbdcb63d..b09ea0bd4 100644
--- a/builder/docker/step_export.go
+++ b/builder/docker/step_export.go
@@ -3,6 +3,7 @@ package docker
 import (
 	"fmt"
 	"os"
+	"path/filepath"
 
 	"github.com/mitchellh/multistep"
 	"github.com/mitchellh/packer/packer"
@@ -26,6 +27,13 @@ func (s *StepExport) Run(state multistep.StateBag) multistep.StepAction {
 		return multistep.ActionHalt
 	}
 
+	// Make the directory we're exporting to if it doesn't exist
+	exportDir := filepath.Dir(config.ExportPath)
+	if err := os.MkdirAll(exportDir, 0755); err != nil {
+		state.Put("error", err)
+		return multistep.ActionHalt
+	}
+
 	// Open the file that we're going to write to
 	f, err := os.Create(config.ExportPath)
 	if err != nil {