Koha-clms/debian/scripts/koha-generate-env

#!/bin/sh
# koha-generate-env -- Generate EnvironmentFile for systemd units
# Usage: koha-generate-env <service> <instance>
#
# Reads koha-conf.xml and /etc/default/koha-common and writes
# /run/koha/<instance>/<service>.env with the parameters the matching
# systemd unit needs. The units run it as root (ExecStartPre=+) so it can
# read the instance's koha-conf.xml, then pick the file up through
# EnvironmentFile= before ExecStart runs.

set -e

SERVICE="$1"
INSTANCE="$2"

if [ -z "$SERVICE" ] || [ -z "$INSTANCE" ]; then
    echo "Usage: koha-generate-env <service> <instance>" >&2
    exit 1
fi

CONF="/etc/koha/sites/${INSTANCE}/koha-conf.xml"
ENVDIR="/run/koha/${INSTANCE}"
ENVFILE="${ENVDIR}/${SERVICE}.env"
DEFAULTS="/etc/default/koha-common"
KOHA_HOME="/usr/share/koha"

if [ ! -f "$CONF" ]; then
    echo "Error: $CONF not found" >&2
    exit 1
fi

# Safe xmlstarlet wrapper: returns empty string if key not found
xml_val() {
    xmlstarlet sel -t -v "yazgfs/config/$1" "$CONF" 2>/dev/null || true
}

# systemd parses the env file line by line and the units pass most values
# as a single argument, so a value must fit on one line and must not
# contain the quote characters used below.
clean() {
    printf '%s' "$1" | tr -d '\n\r"\\'
}

# number_or <value> <default>: keep <value> only if it is a plain integer
number_or() {
    case "$1" in
        '' | *[!0-9]*) printf '%s' "$2" ;;
        *) printf '%s' "$1" ;;
    esac
}

# koha-create-dirs normally creates this; make sure it exists with the
# ownership the instance user expects if we got here first.
if [ ! -d "$ENVDIR" ]; then
    install -d -o "${INSTANCE}-koha" -g "${INSTANCE}-koha" "$ENVDIR"
fi

case "$SERVICE" in
    plack)
        WORKERS=$(number_or "$(xml_val plack_workers)" 2)
        MAX_REQUESTS=$(number_or "$(xml_val plack_max_requests)" 50)
        DEBUG_MODE=$(xml_val debug_mode)

        PSGIFILE="/etc/koha/plack.psgi"
        if [ -f "/etc/koha/sites/${INSTANCE}/plack.psgi" ]; then
            PSGIFILE="/etc/koha/sites/${INSTANCE}/plack.psgi"
        fi

        # Same rule as is_debug_mode in koha-functions.sh: anything set
        # and not "0" means development.
        if [ -n "$DEBUG_MODE" ] && [ "$DEBUG_MODE" != "0" ]; then
            ENVIRONMENT="development"
        else
            ENVIRONMENT="deployment"
        fi

        cat >"$ENVFILE" <<EOF
PLACK_WORKERS=${WORKERS}
PLACK_MAX_REQUESTS=${MAX_REQUESTS}
PLACK_ENVIRONMENT=${ENVIRONMENT}
PLACK_PSGIFILE="$(clean "$PSGIFILE")"
EOF
        ;;

    zebra)
        LOGLEVELS=$(clean "$(xml_val zebra_loglevels)")
        MAX_RECORD_SIZE=$(number_or "$(xml_val zebra_max_record_size)" 1024)

        cat >"$ENVFILE" <<EOF
ZEBRA_LOGLEVELS=${LOGLEVELS:-none,fatal,warn}
ZEBRA_MAX_RECORD_SIZE=${MAX_RECORD_SIZE}
EOF
        ;;

    es-indexer)
        BATCH_SIZE=$(number_or "$(xml_val es_indexer_batch_size)" 10)

        cat >"$ENVFILE" <<EOF
ES_BATCH_SIZE=${BATCH_SIZE}
EOF
        ;;

    indexer)
        # Resolve the daemon and its parameters exactly like koha-indexer
        # does for the SysV path: /etc/default/koha-common may set
        # INDEXER_TIMEOUT, ALTERNATE_INDEXER_DAEMON and INDEXER_PARAMS.
        INDEXER_TIMEOUT=5
        INDEXER_DAEMON="${KOHA_HOME}/bin/migration_tools/rebuild_zebra.pl"
        INDEXER_PARAMS=""
        ALTERNATE_INDEXER_DAEMON=""
        if [ -f "$DEFAULTS" ]; then
            . "$DEFAULTS"
        fi
        if [ -n "$ALTERNATE_INDEXER_DAEMON" ]; then
            INDEXER_DAEMON="$ALTERNATE_INDEXER_DAEMON"
        fi
        INDEXER_TIMEOUT=$(number_or "$INDEXER_TIMEOUT" 5)
        if [ "$INDEXER_TIMEOUT" -lt 1 ]; then
            INDEXER_TIMEOUT=5
        fi
        if [ -z "$INDEXER_PARAMS" ]; then
            INDEXER_PARAMS="-daemon -sleep $INDEXER_TIMEOUT"
        fi

        cat >"$ENVFILE" <<EOF
INDEXER_TIMEOUT=${INDEXER_TIMEOUT}
INDEXER_DAEMON="$(clean "$INDEXER_DAEMON")"
INDEXER_PARAMS="$(clean "$INDEXER_PARAMS")"
EOF
        ;;

    z3950)
        # Per-instance config dir when it has a config.xml (the same test
        # is_z3950_enabled uses), otherwise the global one.
        CONFIGDIR="/etc/koha/z3950"
        if [ -e "/etc/koha/sites/${INSTANCE}/z3950/config.xml" ]; then
            CONFIGDIR="/etc/koha/sites/${INSTANCE}/z3950"
        fi

        # Additional options: /etc/default/koha-common wins, then the
        # z3950_responder_options element of the responder's config.xml,
        # as in the SysV path.
        Z3950_ADDITIONAL_OPTS=""
        if [ -f "$DEFAULTS" ]; then
            . "$DEFAULTS"
        fi
        if [ -z "$Z3950_ADDITIONAL_OPTS" ] && [ -f "${CONFIGDIR}/config.xml" ]; then
            Z3950_ADDITIONAL_OPTS=$(xmlstarlet sel -t -v 'yazgfs/config/z3950_responder_options' "${CONFIGDIR}/config.xml" 2>/dev/null || true)
        fi

        cat >"$ENVFILE" <<EOF
Z3950_CONFIGDIR="$(clean "$CONFIGDIR")"
Z3950_ADDITIONAL_OPTS="$(clean "$Z3950_ADDITIONAL_OPTS")"
EOF
        ;;

    *)
        # Nothing to configure for this service; leave an empty file so the
        # unit's EnvironmentFile= still resolves.
        : >"$ENVFILE"
        ;;
esac

chmod 640 "$ENVFILE"
chown root:"${INSTANCE}-koha" "$ENVFILE"