# SPDX-License-Identifier: GPL-2.0-only
# Makefile for the different targets used to generate full packages of a kernel

include $(srctree)/scripts/Kbuild.include
include $(srctree)/scripts/Makefile.lib

# Git
# ---------------------------------------------------------------------------

filechk_HEAD = git -C $(srctree) rev-parse --verify HEAD 2>/dev/null

.tmp_HEAD: check-git FORCE
	$(call filechk,HEAD)

PHONY += check-git
check-git:
	@if ! $(srctree)/scripts/check-git; then \
		echo >&2 "error: creating source package requires git repository"; \
		false; \
	fi

git-config-tar.gz   = -c tar.tar.gz.command="$(KGZIP)"
git-config-tar.bz2  = -c tar.tar.bz2.command="$(KBZIP2)"
git-config-tar.lzma = -c tar.tar.lzma.command="$(LZMA)"
git-config-tar.xz   = -c tar.tar.xz.command="$(XZ)"
git-config-tar.zst  = -c tar.tar.zst.command="$(ZSTD)"

quiet_cmd_archive = ARCHIVE $@
      cmd_archive = git -C $(srctree) $(git-config-tar$(suffix $@)) archive \
                    --output=$$(realpath $@) $(archive-args)

suffix-gzip  := .gz
suffix-bzip2 := .bz2
suffix-lzma  := .lzma
suffix-xz    := .xz

# Linux source tarball
# ---------------------------------------------------------------------------

linux-tarballs := $(addprefix linux, .tar.gz .tar.bz2 .tar.lzma .tar.xz)

targets += $(linux-tarballs)
$(linux-tarballs): archive-args = --prefix=linux/ $$(cat $<)
$(linux-tarballs): .tmp_HEAD FORCE
	$(call if_changed,archive)

# rpm-pkg srcrpm-pkg binrpm-pkg
# ---------------------------------------------------------------------------

quiet_cmd_mkspec = GEN     $@
      cmd_mkspec = $(srctree)/scripts/package/mkspec $@

rpmbuild/SPECS/kernel.spec: FORCE
	$(call cmd,mkspec)

PHONY += rpm-sources
rpm-sources: linux.tar.gz
	$(Q)mkdir -p rpmbuild/SOURCES
	$(Q)ln -f linux.tar.gz rpmbuild/SOURCES/linux.tar.gz
	$(Q)cp $(KCONFIG_CONFIG) rpmbuild/SOURCES/config
	$(Q)$(srctree)/scripts/package/gen-diff-patch rpmbuild/SOURCES/diff.patch

PHONY += rpm-pkg srcrpm-pkg binrpm-pkg

rpm-pkg:    private build-type := a
srcrpm-pkg: private build-type := s
binrpm-pkg: private build-type := b

rpm-pkg srcrpm-pkg: rpm-sources
rpm-pkg srcrpm-pkg binrpm-pkg: rpmbuild/SPECS/kernel.spec
	+$(strip rpmbuild -b$(build-type) rpmbuild/SPECS/kernel.spec \
	--define='_topdir $(abspath rpmbuild)' \
	$(if $(filter a b, $(build-type)), \
		--target $(UTS_MACHINE)-linux --build-in-place --noprep --define='_smp_mflags %{nil}' \
		$$(rpm -q rpm >/dev/null 2>&1 || echo --nodeps)) \
	$(RPMOPTS))

# deb-pkg srcdeb-pkg bindeb-pkg
# ---------------------------------------------------------------------------

KDEB_SOURCE_COMPRESS ?= gzip

supported-deb-source-compress := gzip bzip2 lzma xz

PHONY += linux.tar.unsupported-deb-src-compress
linux.tar.unsupported-deb-src-compress:
	@echo "error: KDEB_SOURCE_COMPRESS=$(KDEB_SOURCE_COMPRESS) is not supported. The supported values are: $(supported-deb-source-compress)" >&2
	@false

debian-orig-suffix := \
    $(strip $(if $(filter $(supported-deb-source-compress), $(KDEB_SOURCE_COMPRESS)), \
    $(suffix-$(KDEB_SOURCE_COMPRESS)),.unsupported-deb-src-compress))

quiet_cmd_debianize = GEN     $@
      cmd_debianize = $(srctree)/scripts/package/mkdebian $(mkdebian-opts)

debian: FORCE
	$(call cmd,debianize)

PHONY += debian-orig
debian-orig: private source = $(shell dpkg-parsechangelog -S Source)
debian-orig: private version = $(shell dpkg-parsechangelog -S Version | sed 's/-[^-]*$$//')
debian-orig: private orig-name = $(source)_$(version).orig.tar$(debian-orig-suffix)
debian-orig: mkdebian-opts = --need-source
debian-orig: linux.tar$(debian-orig-suffix) debian
	$(Q)if [ "$(df  --output=target .. 2>/dev/null)" = "$(df --output=target $< 2>/dev/null)" ]; then \
		ln -f $< ../$(orig-name); \
	else \
		cp $< ../$(orig-name); \
	fi

PHONY += deb-pkg srcdeb-pkg bindeb-pkg

deb-pkg:    private build-type := source,binary
srcdeb-pkg: private build-type := source
bindeb-pkg: private build-type := binary

deb-pkg srcdeb-pkg: debian-orig
bindeb-pkg: debian
deb-pkg srcdeb-pkg bindeb-pkg:
	+$(strip dpkg-buildpackage \
	--build=$(build-type) --no-pre-clean --unsigned-changes \
	$(if $(findstring source, $(build-type)), \
		--unsigned-source --compression=$(KDEB_SOURCE_COMPRESS)) \
	$(if $(findstring binary, $(build-type)), \
		-R'$(MAKE) -f debian/rules' -j1 -a$$(cat debian/arch), \
		--no-check-builddeps) \
	$(DPKG_FLAGS))

# snap-pkg
# ---------------------------------------------------------------------------
PHONY += snap-pkg
snap-pkg:
	rm -rf $(objtree)/snap
	mkdir $(objtree)/snap
	$(MAKE) clean
	sed "s@KERNELRELEASE@$(KERNELRELEASE)@; \
		s@SRCTREE@$(realpath $(srctree))@" \
		$(srctree)/scripts/package/snapcraft.template > \
		$(objtree)/snap/snapcraft.yaml
	cd $(objtree)/snap && \
	snapcraft --target-arch=$(UTS_MACHINE)

# dir-pkg tar*-pkg - tarball targets
# ---------------------------------------------------------------------------

tar-install: FORCE
	$(Q)$(MAKE) -f $(srctree)/Makefile
	+$(Q)$(srctree)/scripts/package/buildtar $@

compress-tar.gz  = -I "$(KGZIP)"
compress-tar.bz2 = -I "$(KBZIP2)"
compress-tar.xz  = -I "$(XZ)"
compress-tar.zst = -I "$(ZSTD)"

quiet_cmd_tar = TAR     $@
      cmd_tar = cd $<; tar cf ../$@ $(compress-tar$(suffix $@)) --owner=root --group=root --sort=name *

dir-tarballs := $(addprefix linux-$(KERNELRELEASE)-$(ARCH), .tar .tar.gz .tar.bz2 .tar.xz .tar.zst)

$(dir-tarballs): tar-install
	$(call cmd,tar)

PHONY += dir-pkg
dir-pkg: tar-install
	@echo "Kernel tree successfully created in $<"

PHONY += tar-pkg
tar-pkg: linux-$(KERNELRELEASE)-$(ARCH).tar
	@:

tar%-pkg: linux-$(KERNELRELEASE)-$(ARCH).tar.% FORCE
	@:

# perf-tar*-src-pkg - generate a source tarball with perf source
# ---------------------------------------------------------------------------

.tmp_perf:
	$(Q)mkdir .tmp_perf

.tmp_perf/HEAD: .tmp_HEAD | .tmp_perf
	$(call cmd,copy)

quiet_cmd_perf_version_file = GEN     $@
      cmd_perf_version_file = cd $(srctree)/tools/perf; util/PERF-VERSION-GEN $(dir $(abspath $@))

# PERF-VERSION-FILE and .tmp_HEAD are independent, but this avoids updating the
# timestamp of PERF-VERSION-FILE.
# The best is to fix tools/perf/util/PERF-VERSION-GEN.
.tmp_perf/PERF-VERSION-FILE: .tmp_HEAD $(srctree)/tools/perf/util/PERF-VERSION-GEN | .tmp_perf
	$(call cmd,perf_version_file)

perf-archive-args = --add-file=$$(realpath $(word 2, $^)) \
	--add-file=$$(realpath $(word 3, $^)) \
	$$(cat $(word 2, $^))^{tree} $$(cat $<)


perf-tarballs := $(addprefix perf-$(KERNELVERSION), .tar .tar.gz .tar.bz2 .tar.xz .tar.zst)

targets += $(perf-tarballs)
$(perf-tarballs): archive-args = --prefix=perf-$(KERNELVERSION)/ $(perf-archive-args)
$(perf-tarballs): tools/perf/MANIFEST .tmp_perf/HEAD .tmp_perf/PERF-VERSION-FILE FORCE
	$(call if_changed,archive)

PHONY += perf-tar-src-pkg
perf-tar-src-pkg: perf-$(KERNELVERSION).tar
	@:

perf-tar%-src-pkg: perf-$(KERNELVERSION).tar.% FORCE
	@:

# Help text displayed when executing 'make help'
# ---------------------------------------------------------------------------
PHONY += help
help:
	@echo '  rpm-pkg             - Build both source and binary RPM kernel packages'
	@echo '  srcrpm-pkg          - Build only the source kernel RPM package'
	@echo '  binrpm-pkg          - Build only the binary kernel RPM package'
	@echo '  deb-pkg             - Build both source and binary deb kernel packages'
	@echo '  srcdeb-pkg          - Build only the source kernel deb package'
	@echo '  bindeb-pkg          - Build only the binary kernel deb package'
	@echo '  snap-pkg            - Build only the binary kernel snap package'
	@echo '                        (will connect to external hosts)'
	@echo '  dir-pkg             - Build the kernel as a plain directory structure'
	@echo '  tar-pkg             - Build the kernel as an uncompressed tarball'
	@echo '  targz-pkg           - Build the kernel as a gzip compressed tarball'
	@echo '  tarbz2-pkg          - Build the kernel as a bzip2 compressed tarball'
	@echo '  tarxz-pkg           - Build the kernel as a xz compressed tarball'
	@echo '  tarzst-pkg          - Build the kernel as a zstd compressed tarball'
	@echo '  perf-tar-src-pkg    - Build the perf source tarball with no compression'
	@echo '  perf-targz-src-pkg  - Build the perf source tarball with gzip compression'
	@echo '  perf-tarbz2-src-pkg - Build the perf source tarball with bz2 compression'
	@echo '  perf-tarxz-src-pkg  - Build the perf source tarball with xz compression'
	@echo '  perf-tarzst-src-pkg - Build the perf source tarball with zst compression'

PHONY += FORCE
FORCE:

# Read all saved command lines and dependencies for the $(targets) we
# may be building above, using $(if_changed{,_dep}). As an
# optimization, we don't need to read them if the target does not
# exist, we will rebuild anyway in that case.

existing-targets := $(wildcard $(sort $(targets)))

-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)

.PHONY: $(PHONY)