Command to upgrade distro

src/freedombone-distro-upgrade

+#!/bin/bash
+#  _____               _           _
+# |   __|___ ___ ___ _| |___ _____| |_ ___ ___ ___
+# |   __|  _| -_| -_| . | . |     | . | . |   | -_|
+# |__|  |_| |___|___|___|___|_|_|_|___|___|_|_|___|
+#
+#                              Freedom in the Cloud
+#
+# Upgrade distro
+
+# License
+# =======
+#
+# Copyright (C) 2019 Bob Mottram <bob@freedombone.net>
+#
+# 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 <http://www.gnu.org/licenses/>.
+
+PROJECT_NAME='freedombone'
+
+export TEXTDOMAIN=${PROJECT_NAME}-logging
+export TEXTDOMAINDIR="/usr/share/locale"
+
+source /usr/local/bin/${PROJECT_NAME}-vars
+
+UTILS_FILES="/usr/share/${PROJECT_NAME}/utils/${PROJECT_NAME}-utils-*"
+for f in $UTILS_FILES
+do
+    source "$f"
+done
+
+APP_FILES="/usr/share/${PROJECT_NAME}/apps/${PROJECT_NAME}-app-*"
+for f in $APP_FILES
+do
+    source "$f"
+done
+
+function upgrade_apps_to_distro {
+    target_distro="$1"
+    FILES="/usr/share/${PROJECT_NAME}/apps/${PROJECT_NAME}-app-*"
+
+    for filename in $FILES
+    do
+        app_name=$(echo "${filename}" | awk -F '-app-' '{print $2}')
+        if grep -q "upgrade_distro_" "${filename}"; then
+            # shellcheck disable=SC2086
+            upgrade_distro_${app_name} "$target_distro"
+        fi
+    done
+}
+
+target_distro="$1"
+if [ "$target_distro" ]; then
+    upgrade_apps_to_distro "$target_distro"
+else
+    echo $'Target distro name not specified'
+    exit 1
+fi
+
+exit 0