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_prepare_for_upstream_systemd_services() {
# ensure "new" data directories don't already exist before we create
# them in order to avoid overwriting data
if [ ! -e /var/lib/dgraph/p ] && \
[ ! -e /var/lib/dgraph/w ] && \
[ ! -e /var/lib/dgraph/zw ]; then
# check for existence of "old" data directories from before the
# upstream systemd service files were used
# (package version <= 20.11.2-1)
if [ ! -e /var/lib/dgraph/data/p ] && \
[ ! -e /var/lib/dgraph/data/w ] && \
[ ! -e /var/lib/dgraph/data/zw ]; then
echo ">> Filesystem matches expected CLEAN state, running " \
"script to prepare for upstream systemd services"
usr/share/dgraph/add_dgraph_account.sh
elif [ -d /var/lib/dgraph/data/p ] && \
[ -d /var/lib/dgraph/data/w ] && \
[ -d /var/lib/dgraph/data/zw ]; then
echo ">> Filesystem matches expected OLD state, running script " \
"to prepare for upstream systemd services AND moving" \
"existing data"
usr/share/dgraph/add_dgraph_account.sh
mv /var/lib/dgraph/data/{p,w,zw} /var/lib/dgraph/
# this will error if other items remain in /var/lib/dgraph/data/
rmdir /var/lib/dgraph/data
else
# at least one of /var/lib/dgraph/data/{p,w,zw} exists but isn't a
# directory
echo ">> Existing OLD data directories don't match " \
"expectations, quitting!"
exit 1
fi
# ensure filesystem matches expectations so binaries can run properly
elif [ -d /var/lib/dgraph/p ] && \
[ -d /var/lib/dgraph/w ] && \
[ -d /var/lib/dgraph/zw ] && \
[[ $(stat -c '%U' /var/lib/dgraph/p) == "dgraph" ]] && \
[[ $(stat -c '%U' /var/lib/dgraph/w) == "dgraph" ]] && \
[[ $(stat -c '%U' /var/lib/dgraph/zw) == "dgraph" ]] && \
[[ $(stat -c '%G' /var/lib/dgraph/p) == "dgraph" ]] && \
[[ $(stat -c '%G' /var/lib/dgraph/w) == "dgraph" ]] && \
[[ $(stat -c '%G' /var/lib/dgraph/zw) == "dgraph" ]]; then
echo ">> Filesystem matches expected NEW state, no need to run" \
"script to transition to upstream systemd services"
else
# at least one of /var/lib/dgraph/{p,w,zw} exists but isn't a
# directory owned by dgraph:dgraph
echo ">> Existing NEW data directories don't match expectations," \
"quitting!"
exit 2
fi
}
## arg 1: the new package version
post_install() {
_prepare_for_upstream_systemd_services
}
## arg 1: the new package version
## arg 2: the old package version
post_upgrade() {
_prepare_for_upstream_systemd_services
}
post_remove() {
echo ">> There are still files related to dgraph-bin at " \
"/var/{lib,log}/dgraph, plus a dgraph user and group"
}
# vim:set ts=2 sw=2 et:
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