package/moby-buildkit: support building as host package

Users may want to use buildkitd and buildkitctl to build images on the host.

Adds package host-moby-buildkit and BR2_PACKAGE_HOST_MOBY_BUILDKIT.

Signed-off-by: Christian Stewart <christian@paral.in>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/Config.in.host

@@ -55,6 +55,7 @@ menu "Host utilities"
 	source "package/meson-tools/Config.in.host"
 	source "package/mfgtools/Config.in.host"
 	source "package/mkpasswd/Config.in.host"
+	source "package/moby-buildkit/Config.in.host"
 	source "package/mtd/Config.in.host"
 	source "package/mtools/Config.in.host"
 	source "package/mxsldr/Config.in.host"

package/moby-buildkit/Config.in.host

@@ -0,0 +1,8 @@
+config BR2_PACKAGE_HOST_MOBY_BUILDKIT
+	bool "host moby-buildkit"
+	depends on BR2_PACKAGE_HOST_GO_HOST_ARCH_SUPPORTS
+	help
+	  BuildKit is a toolkit for converting source code to build
+	  artifacts in an efficient expressive and repeatable manner.
+
+	  https://github.com/moby/buildkit

package/moby-buildkit/moby-buildkit.mk

@@ -19,4 +19,10 @@ MOBY_BUILDKIT_LDFLAGS = \
 
 MOBY_BUILDKIT_INSTALL_BINS = $(notdir $(MOBY_BUILDKIT_BUILD_TARGETS))
 
+HOST_MOBY_BUILDKIT_TAGS = cgo
+HOST_MOBY_BUILDKIT_BUILD_TARGETS = cmd/buildctl cmd/buildkitd
+
+HOST_MOBY_BUILDKIT_INSTALL_BINS = $(notdir $(HOST_MOBY_BUILDKIT_BUILD_TARGETS))
+
 $(eval $(golang-package))
+$(eval $(host-golang-package))