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#!/bin/bash
ACTION="$1"
SCHROOT_BASE="${SCHROOT_BASE:-/etc/schroot}"
SCHROOT_CONF="${SCHROOT_CONF:-${SCHROOT_BASE}/schroot.conf}"
BASEROCK_BASE="${BASEROCK_BASE:-/opt/baserock/chroots}"
clear_entries () {
sed -e'/BASEROCK_ENTRIES_BEGIN/,/BASEROCK_ENTRIES_END/d' -i "${SCHROOT_CONF}"
}
find_default () {
grep "^aliases" "$SCHROOT_CONF" | grep -q "default"
}
add_conf_line () {
echo "$@" >> "${SCHROOT_CONF}"
}
list_baserocks () {
(cd "${BASEROCK_BASE}" && ls -d */baserock) 2>/dev/null | sed -e's@/baserock$@@'
}
add_entries () {
add_conf_line "# BASEROCK_ENTRIES_BEGIN"
while read entry; do
add_conf_line "[baserock-$entry]"
add_conf_line "type=directory"
add_conf_line "directory=${BASEROCK_BASE}/${entry}"
add_conf_line "description=Baserock in $entry"
add_conf_line "users=root"
add_conf_line "script-config=baserock-$entry/config"
if ! find_default; then
test -e "${BASEROCK_BASE}/$entry/default" && add_conf_line "aliases=default"
fi
done < <(list_baserocks)
add_conf_line "# BASEROCK_ENTRIES_END"
}
find_configs () {
(cd "${SCHROOT_BASE}"; ls -d baserock-*/config) 2>/dev/null | sed -e's@/config$@@'
}
find_used_configs () {
grep "^script-config" "${SCHROOT_CONF}" | grep baserock | sed -e's@script-config *= *@@'
}
is_config_used () {
grep "script-config *= *" "${SCHROOT_CONF}" | grep -q -F "$1/config"
}
add_new_configs () {
for entry in $(list_baserocks); do
if ! test -e "${SCHROOT_BASE}/baserock-${entry}/config"; then
mkdir -p "${SCHROOT_BASE}/baserock-${entry}"
cat > "${SCHROOT_BASE}/baserock-${entry}/config" <<EOF
FSTAB="${SCHROOT_BASE}/baserock-${entry}/fstab"
COPYFILES="${SCHROOT_BASE}/baserock-${entry}/copyfiles"
NSSDATABASE="${SCHROOT_BASE}/baserock-${entry}/fstab"
EOF
cat > "${SCHROOT_BASE}/baserock-${entry}/fstab" <<'EOF'
/proc /proc none rw,bind 0 0
/sys /sys none rw,bind 0 0
/dev /dev none rw,bind 0 0
/dev/pts /dev/pts none rw,bind 0 0
/tmp /tmp none rw,bind 0 0
EOF
cat > "${SCHROOT_BASE}/baserock-${entry}/copyfiles" <<'EOF'
/etc/resolv.conf
EOF
cat > "${SCHROOT_BASE}/baserock-${entry}/nssdatabase" <<'EOF'
networks
hosts
EOF
fi
done
}
clear_unused_configs () {
while read config; do
if ! is_config_used "$config"; then
rm -rf "${SCHROOT_BASE}/${config}"
fi
done < <(find_configs)
}
case "$ACTION" in
purge)
clear_entries
clear_unused_configs
;;
*)
clear_entries
add_entries
add_new_configs
clear_unused_configs
;;
esac
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