hack: fix dev-shell script

docker-bake.hcl

@@ -6,6 +6,14 @@ variable "TEST_BASE_TYPE" {
     default = "alpine"
 }
 
+variable "TEST_BASE_IMAGE" {
+    default = TEST_BASE_TYPE == "alpine" ? "alpine:3.19" : TEST_BASE_TYPE == "debian" ? "debian:bookworm" : null
+}
+
+variable "DEV_SDK_PLATFORM" {
+    default = null
+}
+
 // Special target: https://github.com/docker/metadata-action#bake-definition
 target "meta-helper" {
     tags = ["${XX_REPO}:test"]
@@ -169,6 +177,11 @@ target "sdk-extras" {
     ]
 }
 
+target "sdk-extras-dev" {
+    inherits = ["sdk-extras"]
+    platforms = DEV_SDK_PLATFORM == null ? null : [ DEV_SDK_PLATFORM ]
+}
+
 target "_ld-base" {
     context = "src/ld"
     contexts = {
@@ -310,3 +323,20 @@ target "libcxx" {
         "linux/arm64",
     ]
 }
+
+target "dev" {
+    context = "src"
+    target = "dev"
+    contexts = {
+        "tonistiigi/xx" = "target:xx"
+        "sdk-extras" = DEV_SDK_PLATFORM != null ? "target:sdk-extras-dev" : "docker-image://scratch"
+    }
+    args = {
+        TEST_BASE_TYPE = TEST_BASE_TYPE
+        TEST_BASE_IMAGE = TEST_BASE_IMAGE
+    }
+    tags = [ "${XX_REPO}:dev" ]
+    output = [
+        "type=docker"
+    ]
+}

hack/dev-shell

@@ -1,6 +1,6 @@
 #!/usr/bin/env sh
 
-docker buildx build --load -t tonistiigi/xx:dev --build-arg TEST_BASE_TYPE --build-arg TEST_BASE_IMAGE --build-arg TEST_WITH_DARWIN --target=dev ./base
+docker buildx bake dev
 
 if ! docker volume inspect xx-pkg-cache >/dev/null 2>&1; then
   docker volume create xx-pkg-cache >/dev/null 2>&1

src/Dockerfile

@@ -101,8 +101,8 @@ FROM scratch AS sdk-extras
 
 # dev can be used for debugging during development
 FROM test-base AS dev
-COPY --from=sdk-extras / /
-COPY --from=xx / /
+COPY --link --from=sdk-extras / /
+COPY --link --from=xx / /
 COPY fixtures fixtures
 COPY *.bats test_helper.bash ./