From fb0407ecdcb7911ff5582f1870659db288290680 Mon Sep 17 00:00:00 2001
From: Nathan LeClaire <nathan.leclaire@gmail.com>
Date: Mon, 15 Dec 2014 12:57:02 -0800
Subject: [PATCH 1/2] Only download boot2docker.iso one time

Signed-off-by: Nathan LeClaire <nathan.leclaire@gmail.com>
---
 drivers/virtualbox/virtualbox.go | 33 ++++++++++++++++++++++++++++++--
 1 file changed, 31 insertions(+), 2 deletions(-)

diff --git a/drivers/virtualbox/virtualbox.go b/drivers/virtualbox/virtualbox.go
index e4ab774d0f..84a2da48c5 100644
--- a/drivers/virtualbox/virtualbox.go
+++ b/drivers/virtualbox/virtualbox.go
@@ -97,6 +97,17 @@ func (d *Driver) SetConfigFromFlags(flags drivers.DriverOptions) error {
 	return nil
 }
 
+func cpIso(src, dest string) error {
+	buf, err := ioutil.ReadFile(src)
+	if err != nil {
+		return err
+	}
+	if err := ioutil.WriteFile(dest, buf, 0600); err != nil {
+		return err
+	}
+	return nil
+}
+
 func (d *Driver) Create() error {
 	var (
 		err    error
@@ -124,8 +135,26 @@ func (d *Driver) Create() error {
 		// 	return err
 		// }
 	}
-	log.Infof("Downloading boot2docker...")
-	if err := downloadISO(d.storePath, "boot2docker.iso", isoURL); err != nil {
+
+	// todo: check latest release URL, download if it's new
+	// until then always use "latest"
+
+	// todo: use real constant for .docker
+	rootPath := filepath.Join(drivers.GetHomeDir(), ".docker")
+	imgPath := filepath.Join(rootPath, "images")
+	commonIsoPath := filepath.Join(imgPath, "boot2docker.iso")
+	if _, err := os.Stat(commonIsoPath); os.IsNotExist(err) {
+		log.Infof("Downloading boot2docker.iso to %s...", commonIsoPath)
+		if err := os.Mkdir(imgPath, 0700); err != nil {
+			return err
+		}
+		if err := downloadISO(imgPath, "boot2docker.iso", isoURL); err != nil {
+			return err
+		}
+	}
+
+	isoDest := filepath.Join(d.storePath, "boot2docker.iso")
+	if err := cpIso(commonIsoPath, isoDest); err != nil {
 		return err
 	}
 

From 154d71ee9cc53548db72d44c81291af4a80cef7d Mon Sep 17 00:00:00 2001
From: Nathan LeClaire <nathan.leclaire@gmail.com>
Date: Tue, 16 Dec 2014 16:24:48 -0800
Subject: [PATCH 2/2] Make more robust based on feedback from @ehazlett

Signed-off-by: Nathan LeClaire <nathan.leclaire@gmail.com>
---
 drivers/virtualbox/virtualbox.go | 44 ++++++++++++++++++++------------
 1 file changed, 27 insertions(+), 17 deletions(-)

diff --git a/drivers/virtualbox/virtualbox.go b/drivers/virtualbox/virtualbox.go
index 84a2da48c5..80daf12a20 100644
--- a/drivers/virtualbox/virtualbox.go
+++ b/drivers/virtualbox/virtualbox.go
@@ -127,37 +127,47 @@ func (d *Driver) Create() error {
 
 	if d.Boot2DockerURL != "" {
 		isoURL = d.Boot2DockerURL
+		log.Infof("Downloading boot2docker.iso from %s...", isoURL)
+		if err := downloadISO(d.storePath, "boot2docker.iso", isoURL); err != nil {
+			return err
+		}
 	} else {
 		// HACK: Docker 1.3 boot2docker image with client/daemon auth
 		isoURL = "https://bfirsh.s3.amazonaws.com/boot2docker/boot2docker-1.3.1-identity-auth.iso"
+
+		// todo: check latest release URL, download if it's new
+		// until then always use "latest"
+
 		// isoURL, err = getLatestReleaseURL()
 		// if err != nil {
 		// 	return err
 		// }
-	}
 
-	// todo: check latest release URL, download if it's new
-	// until then always use "latest"
+		// todo: use real constant for .docker
+		rootPath := filepath.Join(drivers.GetHomeDir(), ".docker")
+		imgPath := filepath.Join(rootPath, "images")
+		commonIsoPath := filepath.Join(imgPath, "boot2docker.iso")
+		if _, err := os.Stat(commonIsoPath); os.IsNotExist(err) {
+			log.Infof("Downloading boot2docker.iso to %s...", commonIsoPath)
+
+			// just in case boot2docker.iso has been manually deleted
+			if _, err := os.Stat(imgPath); os.IsNotExist(err) {
+				if err := os.Mkdir(imgPath, 0700); err != nil {
+					return err
+				}
+			}
 
-	// todo: use real constant for .docker
-	rootPath := filepath.Join(drivers.GetHomeDir(), ".docker")
-	imgPath := filepath.Join(rootPath, "images")
-	commonIsoPath := filepath.Join(imgPath, "boot2docker.iso")
-	if _, err := os.Stat(commonIsoPath); os.IsNotExist(err) {
-		log.Infof("Downloading boot2docker.iso to %s...", commonIsoPath)
-		if err := os.Mkdir(imgPath, 0700); err != nil {
-			return err
+			if err := downloadISO(imgPath, "boot2docker.iso", isoURL); err != nil {
+				return err
+			}
 		}
-		if err := downloadISO(imgPath, "boot2docker.iso", isoURL); err != nil {
+
+		isoDest := filepath.Join(d.storePath, "boot2docker.iso")
+		if err := cpIso(commonIsoPath, isoDest); err != nil {
 			return err
 		}
 	}
 
-	isoDest := filepath.Join(d.storePath, "boot2docker.iso")
-	if err := cpIso(commonIsoPath, isoDest); err != nil {
-		return err
-	}
-
 	log.Infof("Creating SSH key...")
 
 	if err := ssh.GenerateSSHKey(d.sshKeyPath()); err != nil {