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#!/bin/bash
# makerepropkg - rebuild a package to see if it is reproducible
#
# Copyright (c) 2019 by Eli Schwartz <eschwartz@archlinux.org>
#
# 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; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
#
m4_include(lib/common.sh)
m4_include(lib/archroot.sh)
source /usr/share/makepkg/util/config.sh
source /usr/share/makepkg/util/message.sh
declare -A buildinfo
declare -a buildenv buildopts installed installpkgs
archiveurl='https://archive.archlinux.org/packages'
buildroot=/var/lib/archbuild/reproducible
chroot=testenv
parse_buildinfo() {
local line var val
while read -r line; do
var="${line%% = *}"
val="${line#* = }"
case ${var} in
buildenv)
buildenv+=("${val}")
;;
options)
buildopts+=("${val}")
;;
installed)
installed+=("${val}")
;;
*)
buildinfo["${var}"]="${val}"
;;
esac
done
}
get_pkgfile() {
local cdir=${cache_dirs[0]}
local pkgfilebase=${1}
local pkgname=${pkgfilebase%-*-*-*}
local pkgfile ext
for ext in .xz .zst ''; do
pkgfile=${pkgfilebase}.pkg.tar${ext}
for c in "${cache_dirs[@]}"; do
if [[ -f ${c}/${pkgfile} ]]; then
cdir=${c}
break
fi
done
for f in "${pkgfile}" "${pkgfile}.sig"; do
if [[ ! -f "${cdir}/${f}" ]]; then
msg2 "retrieving '%s'..." "${f}" >&2
curl -Llf -# -o "${cdir}/${f}" "${archiveurl}/${pkgname:0:1}/${pkgname}/${f}" || continue 2
fi
done
printf '%s\n' "file://${cdir}/${pkgfile}"
return 0
done
return 1
}
usage() {
cat << __EOF__
usage: ${BASH_SOURCE[0]##*/} [options] <package_file>
Run this script in a PKGBUILD dir to build a package inside a
clean chroot while attempting to reproduce it. The package file
will be used to derive metadata needed for reproducing the
package, including the .PKGINFO as well as the buildinfo.
For more details see https://reproducible-builds.org/
OPTIONS
-c <dir> Set pacman cache
-M <file> Location of a makepkg config file
-h Show this usage message
__EOF__
}
while getopts 'M:c:h' arg; do
case "$arg" in
M) archroot_args+=(-M "$OPTARG") ;;
c) cache_dirs+=("$OPTARG") ;;
h) usage; exit 0 ;;
*|?) usage; exit 1 ;;
esac
done
shift $((OPTIND - 1))
check_root
if [[ -n $1 ]]; then
pkgfile="$1"
if ! bsdtar -tqf "${pkgfile}" .BUILDINFO >/dev/null 2>&1; then
error "file is not a valid pacman package: '%s'" "${pkgfile}"
exit 1
fi
else
error "no package file specified. Try '${BASH_SOURCE[0]##*/} -h' for more information. "
exit 1
fi
if (( ${#cache_dirs[@]} == 0 )); then
mapfile -t cache_dirs < <(pacman-conf CacheDir)
fi
ORIG_HOME=${HOME}
IFS=: read -r _ _ _ _ _ HOME _ < <(getent passwd "${SUDO_USER:-$USER}")
load_makepkg_config
HOME=${ORIG_HOME}
[[ -d ${SRCDEST} ]] || SRCDEST=${PWD}
parse_buildinfo < <(bsdtar -xOqf "${pkgfile}" .BUILDINFO)
export SOURCE_DATE_EPOCH="${buildinfo[builddate]}"
PACKAGER="${buildinfo[packager]}"
BUILDDIR="${buildinfo[builddir]}"
PKGEXT=${pkgfile#${pkgfile%.pkg.tar*}}
# nuke and restore reproducible testenv
for copy in "${buildroot}"/*/; do
[[ -d ${copy} ]] || continue
subvolume_delete_recursive "${copy}"
done
rm -rf --one-file-system "${buildroot}"
(umask 0022; mkdir -p "${buildroot}")
for fname in "${installed[@]}"; do
if ! allpkgfiles+=("$(get_pkgfile "${fname}")"); then
error "failed to retrieve ${fname}"
exit 1
fi
done
printf '%s\n' "${allpkgfiles[@]}" | mkarchroot -M @pkgdatadir@/makepkg-x86_64.conf -U "${archroot_args[@]}" "${buildroot}"/root - || exit 1
# use makechrootpkg to prep the build directory
makechrootpkg -r "${buildroot}" -l "${chroot}" -- --packagelist || exit 1
# set detected makepkg.conf options
{
for var in PACKAGER BUILDDIR PKGEXT; do
printf '%s=%s\n' "${var}" "${!var@Q}"
done
printf 'OPTIONS=(%s)\n' "${buildopts[*]@Q}"
printf 'BUILDENV=(%s)\n' "${buildenv[*]@Q}"
} >> "${buildroot}/${chroot}"/etc/makepkg.conf >> "${buildroot}/${chroot}"/etc/makepkg.conf
install -d -o "${SUDO_UID:-$UID}" -g "$(id -g "${SUDO_UID:-$UID}")" "${buildroot}/${chroot}/${BUILDDIR}"
# kick off the build
arch-nspawn "${buildroot}/${chroot}" \
--bind="${PWD}:/startdir" \
--bind="${SRCDEST}:/srcdest" \
/chrootbuild -C --noconfirm --log --holdver --skipinteg
if (( $? == 0 )); then
msg2 "built succeeded! built packages can be found in ${buildroot}/${chroot}/pkgdest"
msg "comparing artifacts..."
if cmp -s "${pkgfile}" "${buildroot}/${chroot}/pkgdest/${pkgfile##*/}"; then
msg2 "Package successfully reproduced!"
exit 0
else
warning "Package is not reproducible. :("
sha256sum "${pkgfile}" "${buildroot}/${chroot}/pkgdest/${pkgfile##*/}"
fi
fi
# the package either failed to build, or was unreproducible
exit 1
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