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authorEli Schwartz <eschwartz@archlinux.org>2019-02-13 17:14:00 -0500
committerLevente Polyak <anthraxx@archlinux.org>2019-11-30 13:21:23 +0100
commit2fb1cc2dd2c2171bd2c078a37f871de45b0fe118 (patch)
tree03072f6accc5b25e92cdc26a9081fc50ea2494a5 /makerepropkg.in
parentbcba56640536406b860fa7364357659b51d0aea5 (diff)
downloaddevtools32-2fb1cc2dd2c2171bd2c078a37f871de45b0fe118.tar.xz
makerepropkg: add new program to try to reproducibly build a package
This attempts to recreate a package that was probably created using makechrootpkg, and see if it conforms to the https://reproducible-builds.org/ specification. Signed-off-by: Eli Schwartz <eschwartz@archlinux.org>
Diffstat (limited to 'makerepropkg.in')
-rwxr-xr-xmakerepropkg.in190
1 files changed, 190 insertions, 0 deletions
diff --git a/makerepropkg.in b/makerepropkg.in
new file mode 100755
index 0000000..710f3ca
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+++ b/makerepropkg.in
@@ -0,0 +1,190 @@
+#!/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=${pkgfilebase%-*-*-*}
+ local pkgfile ext
+
+ for ext in .xz .zstd ''; do
+ pkgfile=${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]}"
+
+# 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 -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; 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