From 46d5c67c1ee6db284e85f8bae716d86d7d9ee281 Mon Sep 17 00:00:00 2001
From: Juan Eugenio Abadie <juaneabadie@gmail.com>
Date: Sat, 28 Oct 2023 18:25:06 +0200
Subject: [PATCH] Pull only when possible

---
 docker-build.sh | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/docker-build.sh b/docker-build.sh
index b0a9b77..ab66077 100755
--- a/docker-build.sh
+++ b/docker-build.sh
@@ -398,6 +398,11 @@ _build_image_buildkit() {
   local cache_image
   cache_image="$(_get_full_stages_image_name)":cache
 
+  local cache_from
+  if _can_pull; then
+    cache_from="--cache-from type=registry,ref=$cache_image"
+  fi
+
   local cache_to
   if _can_push; then
     cache_to="--cache-to mode=max,image-manifest=true,type=registry,ref=$cache_image"
@@ -410,7 +415,7 @@ _build_image_buildkit() {
   # shellcheck disable=SC2086
   docker buildx build \
     --load \
-    --cache-from type=registry,ref="$cache_image" \
+    $cache_from \
     $cache_to \
     --tag "$DUMMY_IMAGE_NAME" \
     --file "${INPUT_CONTEXT}"/"${INPUT_DOCKERFILE}" \