kbuild: tar-pkg: use tar rules in scripts/Makefile.package

Use %.tar, %.tar.gz, %.tar.bz2, %.tar.xz, %.tar.zst rules in
scripts/Makefile.package.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

scripts/Makefile.package

@@ -145,13 +145,30 @@ snap-pkg:
 	cd $(objtree)/snap && \
 	snapcraft --target-arch=$(UTS_MACHINE)
 
-# tarball targets
+# dir-pkg tar*-pkg - tarball targets
 # ---------------------------------------------------------------------------
-tar-pkgs := dir-pkg tar-pkg targz-pkg tarbz2-pkg tarxz-pkg tarzst-pkg
-PHONY += $(tar-pkgs)
-$(tar-pkgs):
-	$(MAKE) -f $(srctree)/Makefile
-	+$(CONFIG_SHELL) $(srctree)/scripts/package/buildtar $@
+
+tar-pkg-tarball = linux-$(KERNELRELEASE)-$(ARCH).$(1)
+tar-pkg-phony = $(subst .,,$(1))-pkg
+
+tar-install: FORCE
+	$(Q)$(MAKE) -f $(srctree)/Makefile
+	+$(Q)$(srctree)/scripts/package/buildtar $@
+
+PHONY += dir-pkg
+dir-pkg: tar-install
+	@echo "Kernel tree successfully created in $<"
+
+define tar-pkg-rule
+PHONY += $(tar-pkg-phony)
+$(tar-pkg-phony): $(tar-pkg-tarball)
+	@:
+
+$(tar-pkg-tarball): private tar-rootdir := tar-install
+$(tar-pkg-tarball): tar-install
+endef
+
+$(foreach x, tar tar.gz tar.bz2 tar.xz tar.zst, $(eval $(call tar-pkg-rule,$(x))))
 
 # perf-tar*-src-pkg - generate a source tarball with perf source
 # ---------------------------------------------------------------------------

scripts/package/buildtar

@@ -16,39 +16,7 @@ set -e
 #
 # Some variables and settings used throughout the script
 #
-tmpdir="${objtree}/tar-install"
-tarball="${objtree}/linux-${KERNELRELEASE}-${ARCH}.tar"
-
-
-#
-# Figure out how to compress, if requested at all
-#
-case "${1}" in
-	dir-pkg|tar-pkg)
-		opts=
-		;;
-	targz-pkg)
-		opts="-I ${KGZIP}"
-		tarball=${tarball}.gz
-		;;
-	tarbz2-pkg)
-		opts="-I ${KBZIP2}"
-		tarball=${tarball}.bz2
-		;;
-	tarxz-pkg)
-		opts="-I ${XZ}"
-		tarball=${tarball}.xz
-		;;
-	tarzst-pkg)
-		opts="-I ${ZSTD}"
-		tarball=${tarball}.zst
-		;;
-	*)
-		echo "Unknown tarball target \"${1}\" requested, please add it to ${0}." >&2
-		exit 1
-		;;
-esac
-
+tmpdir=$1
 
 #
 # Clean-up and re-create the temporary directory
@@ -148,21 +116,3 @@ case "${ARCH}" in
 		sleep 5
 		;;
 esac
-
-if [ "${1}" = dir-pkg ]; then
-	echo "Kernel tree successfully created in $tmpdir"
-	exit 0
-fi
-
-#
-# Create the tarball
-#
-if tar --owner=root --group=root --help >/dev/null 2>&1; then
-	opts="$opts --owner=root --group=root"
-fi
-
-tar cf $tarball -C $tmpdir $opts $dirs
-
-echo "Tarball successfully created in $tarball"
-
-exit 0