scripts/package/mkdebian - linux - Git at Google

 #!/bin/sh
 #
 # Copyright 2003 Wichert Akkerman <wichert@wiggy.net>
 #
 # Simple script to generate a debian/ directory for a Linux kernel.

 set -e

 is_enabled() {
 	grep -q "^$1=y" include/config/auto.conf
 }

 if_enabled_echo() {
 	if is_enabled "$1"; then
 		echo -n "$2"
 	elif [ $# -ge 3 ]; then
 		echo -n "$3"
 	fi
 }

 set_debarch() {
 	if [ -n "$KBUILD_DEBARCH" ] ; then
 		debarch="$KBUILD_DEBARCH"
 		return
 	fi

 	# Attempt to find the correct Debian architecture
 	case "$UTS_MACHINE" in
 	i386|ia64|alpha|m68k|riscv*)
 		debarch="$UTS_MACHINE" ;;
 	x86_64)
 		debarch=amd64 ;;
 	sparc*)
 		debarch=sparc$(if_enabled_echo CONFIG_64BIT 64) ;;
 	s390*)
 		debarch=s390x ;;
 	ppc*)
 		if is_enabled CONFIG_64BIT; then
 			debarch=ppc64$(if_enabled_echo CONFIG_CPU_LITTLE_ENDIAN el)
 		else
 			debarch=powerpc$(if_enabled_echo CONFIG_SPE spe)
 		fi
 		;;
 	parisc*)
 		debarch=hppa ;;
 	mips*)
 		if is_enabled CONFIG_CPU_LITTLE_ENDIAN; then
 			debarch=mips$(if_enabled_echo CONFIG_64BIT 64)$(if_enabled_echo CONFIG_CPU_MIPSR6 r6)el
 		elif is_enabled CONFIG_CPU_MIPSR6; then
 			debarch=mips$(if_enabled_echo CONFIG_64BIT 64)r6
 		else
 			debarch=mips
 		fi
 		;;
 	aarch64|arm64)
 		debarch=arm64 ;;
 	arm*)
 		if is_enabled CONFIG_AEABI; then
 			debarch=arm$(if_enabled_echo CONFIG_VFP hf el)
 		else
 			debarch=arm
 		fi
 		;;
 	openrisc)
 		debarch=or1k ;;
 	sh)
 		if is_enabled CONFIG_CPU_SH3; then
 			debarch=sh3$(if_enabled_echo CONFIG_CPU_BIG_ENDIAN eb)
 		elif is_enabled CONFIG_CPU_SH4; then
 			debarch=sh4$(if_enabled_echo CONFIG_CPU_BIG_ENDIAN eb)
 		fi
 		;;
 	esac
 	if [ -z "$debarch" ]; then
 		debarch=$(dpkg-architecture -qDEB_HOST_ARCH)
 		echo "" >&2
 		echo "** ** **  WARNING  ** ** **" >&2
 		echo "" >&2
 		echo "Your architecture doesn't have its equivalent" >&2
 		echo "Debian userspace architecture defined!" >&2
 		echo "Falling back to the current host architecture ($debarch)." >&2
 		echo "Please add support for $UTS_MACHINE to ${0} ..." >&2
 		echo "" >&2
 	fi
 }

 # Some variables and settings used throughout the script
 version=$KERNELRELEASE
 if [ -n "$KDEB_PKGVERSION" ]; then
 	packageversion=$KDEB_PKGVERSION
 	revision=${packageversion##*-}
 else
 	revision=$(cat .version 2>/dev/null||echo 1)
 	packageversion=$version-$revision
 fi
 sourcename=$KDEB_SOURCENAME

 if [ "$ARCH" = "um" ] ; then
 	packagename=user-mode-linux
 else
 	packagename=linux-image
 fi

 debarch=
 set_debarch

 email=${DEBEMAIL-$EMAIL}

 # use email string directly if it contains <email>
 if echo $email | grep -q '<.*>'; then
 	maintainer=$email
 else
 	# or construct the maintainer string
 	user=${KBUILD_BUILD_USER-$(id -nu)}
 	name=${DEBFULLNAME-$user}
 	if [ -z "$email" ]; then
 		buildhost=${KBUILD_BUILD_HOST-$(hostname -f 2>/dev/null || hostname)}
 		email="$user@$buildhost"
 	fi
 	maintainer="$name <$email>"
 fi

 # Try to determine distribution
 if [ -n "$KDEB_CHANGELOG_DIST" ]; then
         distribution=$KDEB_CHANGELOG_DIST
 # In some cases lsb_release returns the codename as n/a, which breaks dpkg-parsechangelog
 elif distribution=$(lsb_release -cs 2>/dev/null) && [ -n "$distribution" ] && [ "$distribution" != "n/a" ]; then
         : # nothing to do in this case
 else
         distribution="unstable"
         echo >&2 "Using default distribution of 'unstable' in the changelog"
         echo >&2 "Install lsb-release or set \$KDEB_CHANGELOG_DIST explicitly"
 fi

 mkdir -p debian/source/
 echo "1.0" > debian/source/format

 echo $debarch > debian/arch
 extra_build_depends=", $(if_enabled_echo CONFIG_UNWINDER_ORC libelf-dev:native)"
 extra_build_depends="$extra_build_depends, $(if_enabled_echo CONFIG_SYSTEM_TRUSTED_KEYRING libssl-dev:native)"

 # Generate a simple changelog template
 cat <<EOF > debian/changelog
 $sourcename ($packageversion) $distribution; urgency=low

   * Custom built Linux kernel.

  -- $maintainer  $(date -R)
 EOF

 # Generate copyright file
 cat <<EOF > debian/copyright
 This is a packacked upstream version of the Linux kernel.

 The sources may be found at most Linux archive sites, including:
 https://www.kernel.org/pub/linux/kernel

 Copyright: 1991 - 2018 Linus Torvalds and others.

 The git repository for mainline kernel development is at:
 git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; version 2 dated June, 1991.

 On Debian GNU/Linux systems, the complete text of the GNU General Public
 License version 2 can be found in \`/usr/share/common-licenses/GPL-2'.
 EOF

 # Generate a control file
 cat <<EOF > debian/control
 Source: $sourcename
 Section: kernel
 Priority: optional
 Maintainer: $maintainer
 Rules-Requires-Root: no
 Build-Depends: bc, rsync, kmod, cpio, bison, flex | flex:native $extra_build_depends
 Homepage: https://www.kernel.org/

 Package: $packagename-$version
 Architecture: $debarch
 Description: Linux kernel, version $version
  This package contains the Linux kernel, modules and corresponding other
  files, version: $version.

 Package: linux-libc-dev
 Section: devel
 Provides: linux-kernel-headers
 Architecture: $debarch
 Description: Linux support headers for userspace development
  This package provides userspaces headers from the Linux kernel.  These headers
  are used by the installed headers for GNU glibc and other system libraries.
 Multi-Arch: same
 EOF

 if is_enabled CONFIG_MODULES; then
 cat <<EOF >> debian/control

 Package: linux-headers-$version
 Architecture: $debarch
 Description: Linux kernel headers for $version on $debarch
  This package provides kernel header files for $version on $debarch
  .
  This is useful for people who need to build external modules
 EOF
 fi

 if is_enabled CONFIG_DEBUG_INFO; then
 cat <<EOF >> debian/control

 Package: linux-image-$version-dbg
 Section: debug
 Architecture: $debarch
 Description: Linux kernel debugging symbols for $version
  This package will come in handy if you need to debug the kernel. It provides
  all the necessary debug symbols for the kernel and its modules.
 EOF
 fi

 cat <<EOF > debian/rules
 #!$(command -v $MAKE) -f

 srctree ?= .

 build-indep:
 build-arch:
 	\$(MAKE) KERNELRELEASE=${version} ARCH=${ARCH} \
 	KBUILD_BUILD_VERSION=${revision} -f \$(srctree)/Makefile

 build: build-arch

 binary-indep:
 binary-arch: build-arch
 	\$(MAKE) KERNELRELEASE=${version} ARCH=${ARCH} \
 	KBUILD_BUILD_VERSION=${revision} -f \$(srctree)/Makefile intdeb-pkg

 clean:
 	rm -rf debian/files debian/linux-*
 	\$(MAKE) clean

 binary: binary-arch
 EOF
 chmod +x debian/rules

 exit 0
	#!/bin/sh
	#
	# Copyright 2003 Wichert Akkerman <wichert@wiggy.net>
	#
	# Simple script to generate a debian/ directory for a Linux kernel.

	set -e

	is_enabled() {
	grep -q "^$1=y" include/config/auto.conf
	}

	if_enabled_echo() {
	if is_enabled "$1"; then
	echo -n "$2"
	elif [ $# -ge 3 ]; then
	echo -n "$3"
	fi
	}

	set_debarch() {
	if [ -n "$KBUILD_DEBARCH" ] ; then
	debarch="$KBUILD_DEBARCH"
	return
	fi

	# Attempt to find the correct Debian architecture
	case "$UTS_MACHINE" in
	i386\|ia64\|alpha\|m68k\|riscv*)
	debarch="$UTS_MACHINE" ;;
	x86_64)
	debarch=amd64 ;;
	sparc*)
	debarch=sparc$(if_enabled_echo CONFIG_64BIT 64) ;;
	s390*)
	debarch=s390x ;;
	ppc*)
	if is_enabled CONFIG_64BIT; then
	debarch=ppc64$(if_enabled_echo CONFIG_CPU_LITTLE_ENDIAN el)
	else
	debarch=powerpc$(if_enabled_echo CONFIG_SPE spe)
	fi
	;;
	parisc*)
	debarch=hppa ;;
	mips*)
	if is_enabled CONFIG_CPU_LITTLE_ENDIAN; then
	debarch=mips$(if_enabled_echo CONFIG_64BIT 64)$(if_enabled_echo CONFIG_CPU_MIPSR6 r6)el
	elif is_enabled CONFIG_CPU_MIPSR6; then
	debarch=mips$(if_enabled_echo CONFIG_64BIT 64)r6
	else
	debarch=mips
	fi
	;;
	aarch64\|arm64)
	debarch=arm64 ;;
	arm*)
	if is_enabled CONFIG_AEABI; then
	debarch=arm$(if_enabled_echo CONFIG_VFP hf el)
	else
	debarch=arm
	fi
	;;
	openrisc)
	debarch=or1k ;;
	sh)
	if is_enabled CONFIG_CPU_SH3; then
	debarch=sh3$(if_enabled_echo CONFIG_CPU_BIG_ENDIAN eb)
	elif is_enabled CONFIG_CPU_SH4; then
	debarch=sh4$(if_enabled_echo CONFIG_CPU_BIG_ENDIAN eb)
	fi
	;;
	esac
	if [ -z "$debarch" ]; then
	debarch=$(dpkg-architecture -qDEB_HOST_ARCH)
	echo "" >&2
	echo " WARNING " >&2
	echo "" >&2
	echo "Your architecture doesn't have its equivalent" >&2
	echo "Debian userspace architecture defined!" >&2
	echo "Falling back to the current host architecture ($debarch)." >&2
	echo "Please add support for $UTS_MACHINE to ${0} ..." >&2
	echo "" >&2
	fi
	}

	# Some variables and settings used throughout the script
	version=$KERNELRELEASE
	if [ -n "$KDEB_PKGVERSION" ]; then
	packageversion=$KDEB_PKGVERSION
	revision=${packageversion##*-}
	else
	revision=$(cat .version 2>/dev/null\|\|echo 1)
	packageversion=$version-$revision
	fi
	sourcename=$KDEB_SOURCENAME

	if [ "$ARCH" = "um" ] ; then
	packagename=user-mode-linux
	else
	packagename=linux-image
	fi

	debarch=
	set_debarch

	email=${DEBEMAIL-$EMAIL}

	# use email string directly if it contains <email>
	if echo $email \| grep -q '<.*>'; then
	maintainer=$email
	else
	# or construct the maintainer string
	user=${KBUILD_BUILD_USER-$(id -nu)}
	name=${DEBFULLNAME-$user}
	if [ -z "$email" ]; then
	buildhost=${KBUILD_BUILD_HOST-$(hostname -f 2>/dev/null \|\| hostname)}
	email="$user@$buildhost"
	fi
	maintainer="$name <$email>"
	fi

	# Try to determine distribution
	if [ -n "$KDEB_CHANGELOG_DIST" ]; then
	distribution=$KDEB_CHANGELOG_DIST
	# In some cases lsb_release returns the codename as n/a, which breaks dpkg-parsechangelog
	elif distribution=$(lsb_release -cs 2>/dev/null) && [ -n "$distribution" ] && [ "$distribution" != "n/a" ]; then
	: # nothing to do in this case
	else
	distribution="unstable"
	echo >&2 "Using default distribution of 'unstable' in the changelog"
	echo >&2 "Install lsb-release or set \$KDEB_CHANGELOG_DIST explicitly"
	fi

	mkdir -p debian/source/
	echo "1.0" > debian/source/format

	echo $debarch > debian/arch
	extra_build_depends=", $(if_enabled_echo CONFIG_UNWINDER_ORC libelf-dev:native)"
	extra_build_depends="$extra_build_depends, $(if_enabled_echo CONFIG_SYSTEM_TRUSTED_KEYRING libssl-dev:native)"

	# Generate a simple changelog template
	cat <<EOF > debian/changelog
	$sourcename ($packageversion) $distribution; urgency=low

	* Custom built Linux kernel.

	-- $maintainer $(date -R)
	EOF

	# Generate copyright file
	cat <<EOF > debian/copyright
	This is a packacked upstream version of the Linux kernel.

	The sources may be found at most Linux archive sites, including:
	https://www.kernel.org/pub/linux/kernel

	Copyright: 1991 - 2018 Linus Torvalds and others.

	The git repository for mainline kernel development is at:
	git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

	This program is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation; version 2 dated June, 1991.

	On Debian GNU/Linux systems, the complete text of the GNU General Public
	License version 2 can be found in \`/usr/share/common-licenses/GPL-2'.
	EOF

	# Generate a control file
	cat <<EOF > debian/control
	Source: $sourcename
	Section: kernel
	Priority: optional
	Maintainer: $maintainer
	Rules-Requires-Root: no
	Build-Depends: bc, rsync, kmod, cpio, bison, flex \| flex:native $extra_build_depends
	Homepage: https://www.kernel.org/

	Package: $packagename-$version
	Architecture: $debarch
	Description: Linux kernel, version $version
	This package contains the Linux kernel, modules and corresponding other
	files, version: $version.

	Package: linux-libc-dev
	Section: devel
	Provides: linux-kernel-headers
	Architecture: $debarch
	Description: Linux support headers for userspace development
	This package provides userspaces headers from the Linux kernel. These headers
	are used by the installed headers for GNU glibc and other system libraries.
	Multi-Arch: same
	EOF

	if is_enabled CONFIG_MODULES; then
	cat <<EOF >> debian/control

	Package: linux-headers-$version
	Architecture: $debarch
	Description: Linux kernel headers for $version on $debarch
	This package provides kernel header files for $version on $debarch
	.
	This is useful for people who need to build external modules
	EOF
	fi

	if is_enabled CONFIG_DEBUG_INFO; then
	cat <<EOF >> debian/control

	Package: linux-image-$version-dbg
	Section: debug
	Architecture: $debarch
	Description: Linux kernel debugging symbols for $version
	This package will come in handy if you need to debug the kernel. It provides
	all the necessary debug symbols for the kernel and its modules.
	EOF
	fi

	cat <<EOF > debian/rules
	#!$(command -v $MAKE) -f

	srctree ?= .

	build-indep:
	build-arch:
	\$(MAKE) KERNELRELEASE=${version} ARCH=${ARCH} \
	KBUILD_BUILD_VERSION=${revision} -f \$(srctree)/Makefile

	build: build-arch

	binary-indep:
	binary-arch: build-arch
	\$(MAKE) KERNELRELEASE=${version} ARCH=${ARCH} \
	KBUILD_BUILD_VERSION=${revision} -f \$(srctree)/Makefile intdeb-pkg

	clean:
	rm -rf debian/files debian/linux-*
	\$(MAKE) clean

	binary: binary-arch
	EOF
	chmod +x debian/rules

	exit 0