linux-kernel - Re: [PATCH 2/2] kbuild: deb-pkg: add KDEB_SOURCE

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Message-ID: <ZEBQPeihAuP4jVYG@bergen.fjasle.eu>
Date:   Wed, 19 Apr 2023 22:34:05 +0200
From:   Nicolas Schier <nicolas@...sle.eu>
To:     Masahiro Yamada <masahiroy@...nel.org>
Cc:     linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
        Ben Hutchings <ben@...adent.org.uk>,
        Bastian Germann <bage@...utronix.de>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>
Subject: Re: [PATCH 2/2] kbuild: deb-pkg: add KDEB_SOURCE_COMPRESS to specify
 compression type

On Mon 17 Apr 2023 23:25:48 GMT, Masahiro Yamada wrote:
> Add KDEB_SOURCE_COMPRESS to specify the compression for the orig and
> debian tarballs. (The existing KDEB_COMPRESS is used to specify the
> compression for binary packages.)

Sounds to me, that it would make sense to sum-up some documentation for 
kbuild Debian package configuration.

> Supported algorithms are gzip, bzip2, lzma, and xz, all of which are
> supported by dpkg-source.
> 
> Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
> ---
> 
>  scripts/Makefile.package | 31 +++++++++++++++++++++++--------
>  1 file changed, 23 insertions(+), 8 deletions(-)
> 
> diff --git a/scripts/Makefile.package b/scripts/Makefile.package
> index d8a36304b26e..ce3d8b4e9cb0 100644
> --- a/scripts/Makefile.package
> +++ b/scripts/Makefile.package
> @@ -41,19 +41,25 @@ check-git:
>  		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.xz  = -c tar.tar.xz.command="$(XZ)"
> -git-config-tar.zst = -c tar.tar.zst.command="$(ZSTD)"
> +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=$$(realpath $@) --prefix=$(basename $@)/ $(archive-args)
>  
> +suffix-gzip  := .gz
> +suffix-bzip2 := .bz2
> +suffix-lzma  := .lzma
> +suffix-xz    := .xz
> +
>  # Linux source tarball
>  # ---------------------------------------------------------------------------
>  
> -linux-tarballs := $(addprefix linux, .tar.gz)
> +linux-tarballs := $(addprefix linux, .tar.gz .tar.bz2 .tar.lzma .tar.xz)
>  
>  targets += $(linux-tarballs)
>  $(linux-tarballs): archive-args = $$(cat $<)
> @@ -88,6 +94,15 @@ binrpm-pkg:
>  # deb-pkg srcdeb-pkg bindeb-pkg
>  # ---------------------------------------------------------------------------
>  
> +KDEB_SOURCE_COMPRESS ?= gzip

According to dpkg-source(1), xz is the default compression for deb 
source format >= 2.  Shouldn't we use xz here by default as well?

Reviewed-by: Nicolas Schier <nicolas@...sle.eu>

Thanks and kind regards,
Nicolas


> +
> +PHONY += linux.tar.unsupported_deb_compress
> +linux.tar.unsupported_deb_compress:
> +	@echo "error: $(KDEB_SOURCE_COMPRESS): unsupported debian source compression" >&2
> +	@false
> +
> +debian-orig-suffix := $(if $(filter gzip bzip2 lzma xz, $(KDEB_SOURCE_COMPRESS)),$(suffix-$(KDEB_SOURCE_COMPRESS)),.unsupported_deb_compress)
> +
>  quiet_cmd_debianize = GEN     $@
>        cmd_debianize = $(srctree)/scripts/package/mkdebian $(mkdebian-opts)
>  
> @@ -97,9 +112,9 @@ debian: FORCE
>  PHONY += debian-orig
>  debian-orig: private source = $(shell dpkg-parsechangelog -S Source)
>  debian-orig: private version = $(shell dpkg-parsechangelog -S Version | sed 's/-[^-]*$$//')
> -debian-orig: private orig-name = $(source)_$(version).orig.tar.gz
> +debian-orig: private orig-name = $(source)_$(version).orig.tar$(debian-orig-suffix)
>  debian-orig: mkdebian-opts = --need-source
> -debian-orig: linux.tar.gz debian
> +debian-orig: linux.tar$(debian-orig-suffix) debian
>  	$(Q)if [ "$(df  --output=target .. 2>/dev/null)" = "$(df --output=target $< 2>/dev/null)" ]; then \
>  		ln -f $< ../$(orig-name); \
>  	else \
> @@ -120,7 +135,7 @@ deb-pkg srcdeb-pkg bindeb-pkg:
>  	+$(strip dpkg-buildpackage \
>  	--build=$(build-type) --no-pre-clean --unsigned-changes \
>  	$(if $(findstring source, $(build-type)), \
> -		--unsigned-source) \
> +		--unsigned-source --compression=$(KDEB_SOURCE_COMPRESS)) \
>  	$(if $(findstring binary, $(build-type)), \
>  		-r$(KBUILD_PKG_ROOTCMD) -a$$(cat debian/arch), \
>  		--no-check-builddeps) \
> -- 
> 2.37.2

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