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#!/bin/sh
# Copyright (C) 2026 Doan Luu Duc Tai <doan@luuduct.ai>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
set -eu
umask 077
ROOT=$(CDPATH= cd -- "$(dirname -- "$0")/../.." && pwd)
command -v bwrap >/dev/null || { echo 'Recovery tests require bubblewrap.' >&2; exit 1; }
STAGE=$(mktemp -d)
trap 'chmod -R u+w "$STAGE"; rm -rf -- "$STAGE"' EXIT HUP INT TERM
mkdir -p "$STAGE/capsule" "$STAGE/runtime/bin" "$STAGE/test-bin"
cp "$ROOT/infra/guix/restore.sh" "$STAGE/capsule/restore"
cp "$ROOT/infra/guix/run.sh" "$STAGE/capsule/run"
cp "$ROOT/infra/guix/containers.conf" "$STAGE/capsule/containers.conf"
printf '%s\n' 'opaque encrypted backup fixture' > "$STAGE/capsule/backup.tar.gz.gpg"
printf '%s\n' 'opaque release fixture' > "$STAGE/capsule/release.tar.gz"
printf '%s\n' 80 > "$STAGE/lowport"
printf '%s\n' '#!/bin/sh' 'exit 0' > "$STAGE/runtime/bin/gpg"
cat > "$STAGE/runtime/bin/podman" <<'PODMAN'
#!/bin/sh
set -eu
[ "$CONTAINERS_CONF" = /capsule/containers.conf ]
printf '%s\n' "$*" >> /tmp/podman.calls
PODMAN
cat > "$STAGE/test-bin/id" <<'ID'
#!/bin/sh
case "$1" in -u) echo 1000 ;; -un) echo service ;; *) exit 1 ;; esac
ID
for HELPER in newuidmap newgidmap; do
printf '%s\n' '#!/bin/sh' 'exit 0' > "$STAGE/test-bin/$HELPER"
done
cat > "$STAGE/capsule/stack" <<'STACK'
#!/bin/sh
set -eu
[ "$CONTAINERS_CONF" = /capsule/containers.conf ]
case "$(command -v podman)" in /tmp/*/runtime/bin/podman) ;; *) exit 97 ;; esac
case "$1" in
restore)
[ "$#" = 3 ] && [ "$2" = /capsule/backup.tar.gz.gpg ]
mkdir -p "$3/var/data" "$3/bin"
printf '%s\n' private-environment > "$3/.env"
printf '%s\n' encrypted-history > "$3/var/data/history"
printf '%s\n' images > "$3/var/images.tar"
printf '%s\n' image-lock > "$3/var/image-lock.json"
printf '%s\n' '#!/bin/sh' 'exit 99' > "$3/bin/stack"
chmod 700 "$3/bin/stack"
printf '%s\n' old-source > "$3/source"
echo restored >> /tmp/restorations
;;
--root)
[ "$#" = 4 ] && [ "$3" = activate ] && [ "$4" = /capsule/release.tar.gz ]
[ ! -e /proc/self/fd/9 ]
[ "$(cat "$4")" = 'opaque release fixture' ]
echo activated >> /tmp/activations
[ ! -f /tmp/fail-activation ] || exit 42
mkdir -p "$2/infra/guix"
printf '%s\n' '#!/bin/sh' 'echo new-management' > "$2/bin/stack"
chmod 700 "$2/bin/stack"
printf '%s\n' new-source > "$2/source"
cp /capsule/run "$2/infra/guix/run.sh"
cp /capsule/run "$2/bin/run"
cp /capsule/containers.conf "$2/infra/guix/containers.conf"
;;
*) exit 98 ;;
esac
STACK
chmod 700 "$STAGE/capsule/stack" "$STAGE/runtime/bin/"* "$STAGE/test-bin/"*
tar -czf "$STAGE/capsule/runtime.tar.gz" -C "$STAGE/runtime" .
(cd "$STAGE/capsule" && sha256sum backup.tar.gz.gpg release.tar.gz runtime.tar.gz restore run stack containers.conf > SHA256SUMS)
bwrap --unshare-user --uid 0 --gid 0 --unshare-pid --cap-add CAP_DAC_OVERRIDE \
--tmpfs / --ro-bind /usr /usr \
--symlink usr/bin /bin --symlink usr/lib /lib --symlink usr/lib /lib64 \
--ro-bind "$STAGE/capsule" /fixture --ro-bind "$STAGE/test-bin" /test-bin \
--proc /proc --dev /dev --tmpfs /tmp \
--ro-bind "$STAGE/lowport" /proc/sys/net/ipv4/ip_unprivileged_port_start \
--setenv PATH /test-bin:/usr/bin --setenv XDG_RUNTIME_DIR /tmp/xdg \
--chdir / /bin/sh -eu <<'TEST'
fail() { printf '%s\n' "$1" >&2; exit 1; }
reject() { if sh /capsule/restore "$1"; then fail "$2"; fi; }
cp -a /fixture /capsule
mkdir -p /etc /gnu/.stack-runtimes /tmp/xdg
printf '%s\n' service:100000:65536 > /etc/subuid
cp /etc/subuid /etc/subgid
DIGEST=$(sha256sum /capsule/runtime.tar.gz)
DIGEST=${DIGEST%% *}
printf '%s\n' "$DIGEST" > "/gnu/.stack-runtimes/$DIGEST"
touch /tmp/fail-activation
STATUS=0
sh /capsule/restore /recovered || STATUS=$?
[ "$STATUS" = 42 ] || fail 'Did not reach the paired release activation.'
[ -f /recovered/var/guix-recovery ]
[ "$(cat /recovered/.env)" = private-environment ]
[ "$(cat /recovered/var/data/history)" = encrypted-history ]
[ "$(cat /recovered/source)" = old-source ]
cp /capsule/backup.tar.gz.gpg /tmp/original-backup
echo changed >> /capsule/backup.tar.gz.gpg
(cd /capsule && sha256sum backup.tar.gz.gpg release.tar.gz runtime.tar.gz restore run stack containers.conf > SHA256SUMS)
reject /recovered 'Accepted a different backup for pending recovery.'
[ "$(wc -l < /tmp/restorations)" = 1 ] && [ "$(wc -l < /tmp/activations)" = 1 ]
cp /tmp/original-backup /capsule/backup.tar.gz.gpg
(cd /capsule && sha256sum backup.tar.gz.gpg release.tar.gz runtime.tar.gz restore run stack containers.conf > SHA256SUMS)
exec 9>/recovered/var/guix-recovery.lock
flock 9
reject /recovered 'Accepted concurrent recovery.' 9>&-
exec 9>&-
[ "$(wc -l < /tmp/activations)" = 1 ]
rm /tmp/fail-activation
sh /capsule/restore /recovered
[ "$(wc -l < /tmp/restorations)" = 1 ] && [ "$(wc -l < /tmp/activations)" = 2 ]
[ ! -e /recovered/var/guix-recovery ]
[ "$(/recovered/bin/stack)" = new-management ] && [ "$(cat /recovered/source)" = new-source ]
cmp /capsule/run /recovered/infra/guix/run.sh
cmp /capsule/containers.conf /recovered/infra/guix/containers.conf
[ "$(cat /recovered/.env)" = private-environment ]
[ "$(cat /recovered/var/data/history)" = encrypted-history ]
mkdir /unrelated
reject /unrelated 'Accepted unrelated existing destination.'
reject /recovered 'Repeated a completed recovery.'
[ "$(wc -l < /tmp/restorations)" = 1 ] && [ "$(wc -l < /tmp/activations)" = 2 ]
printf '%s\n' 'Synthetic recovery orchestration, resume, intent, locks and preservation passed; no real encryption or container lifecycle proved.'
TEST
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