[nongnu] elpa/dockerfile-mode 27a9f4d2f3 092/104: Added the option to use docker buildkit

[ELPA Syncer]

branch: elpa/dockerfile-mode
commit 27a9f4d2f3cfcc4188955f27d1945850d850aed1
Author: fredeb <frederikbraendstrup@gmail.com>
Commit: Drew Csillag <drew@thecsillags.com>

    Added the option to use docker buildkit
---
 dockerfile-mode.el | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/dockerfile-mode.el b/dockerfile-mode.el
index f48fac97c7..ffa79d5f4b 100644
--- a/dockerfile-mode.el
+++ b/dockerfile-mode.el
@@ -59,6 +59,15 @@ Each element of the list will be passed as a separate
   :type '(repeat string)
   :group 'dockerfile)
 
+(defcustom dockerfile-use-buildkit nil
+  "If t use Docker buildkit for building images
+
+This is the new buildsystem for docker, and in time it will replace the old one
+but for now it has to be explicitly enabled to work.
+It is supported from docker 18.09"
+  :type 'boolean
+  :group 'dockerfile)
+
 (defface dockerfile-image-name
   '((t (:inherit (font-lock-type-face bold))))
   "Face to highlight the base image name after FROM instruction.")
@@ -176,7 +185,8 @@ The build string will be of the format:
   (save-buffer)
     (compilation-start
         (format
-            "%s%s build %s %s %s -f %s %s"
+            "%s%s%s build %s %s %s -f %s %s"
+            (if dockerfile-use-buildkit "DOCKER_BUILDKIT=1 " "")
             (if dockerfile-use-sudo "sudo " "")
             dockerfile-mode-command
             (if no-cache "--no-cache" "")