tooling box: added nginx + polished bash scripts and environment

- add installation method for nginx sites, morty and filtron
- clean up PUBLIC_URL environment in and outside of containers
- clean up comand lines
- handle uWSGI quirks on fedora (emperor mode)
- handle Python quirks on debian (there is no 'python' command anymore)
- lib.sh: add die and die_caller functions
- lxc_suite_install_info is now a function
- lint: shellcheck

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

utils/morty.sh

@@ -7,6 +7,7 @@ source "$(dirname "${BASH_SOURCE[0]}")/lib.sh"
 # shellcheck source=utils/brand.env
 source "${REPO_ROOT}/utils/brand.env"
 source_dot_config
+SEARX_URL="${PUBLIC_URL:-http://$(uname -n)/searx}"
 source "${REPO_ROOT}/utils/lxc-searx.env"
 in_container && lxc_set_suite_env
 
@@ -17,12 +18,7 @@ in_container && lxc_set_suite_env
 MORTY_LISTEN="${MORTY_LISTEN:-127.0.0.1:3000}"
 PUBLIC_URL_PATH_MORTY="${PUBLIC_URL_PATH_MORTY:-/morty/}"
 
-SEARX_URL="${PUBLIC_URL:-http://$(uname -n)/searx}"
-PUBLIC_URL_MORTY="$(echo "$SEARX_URL" |  sed -e's,^\(.*://[^/]*\).*,\1,g')${PUBLIC_URL_PATH_MORTY}"
-if in_container; then
-    # container hostnames do not have a DNS entry, use primary IP
-    PUBLIC_URL_MORTY="$(url_replace_hostname "$PUBLIC_URL_MORTY" "$(primary_ip)")"
-fi
+PUBLIC_URL_MORTY="${PUBLIC_URL_MORTY:-$(echo "$SEARX_URL" |  sed -e's,^\(.*://[^/]*\).*,\1,g')${PUBLIC_URL_PATH_MORTY}}"
 
 # shellcheck disable=SC2034
 MORTY_TIMEOUT=5
@@ -229,6 +225,11 @@ install_all() {
         if ask_yn "Do you want to install a reverse proxy (ProxyPass)" Yn; then
             install_apache_site
         fi
+    elif nginx_is_installed; then
+        info_msg "nginx is installed on this host."
+        if ask_yn "Do you want to install a reverse proxy (ProxyPass)" Yn; then
+            install_nginx_site
+        fi
     fi
     info_searx
     if ask_yn "Add image and result proxy to searx settings.yml?" Yn; then
@@ -462,7 +463,9 @@ This installs a reverse proxy (ProxyPass) into nginx site (${NGINX_MORTY_SITE})"
 
     "${REPO_ROOT}/utils/searx.sh" install uwsgi
 
+    # shellcheck disable=SC2034
     SEARX_SRC=$("${REPO_ROOT}/utils/searx.sh" --getenv SEARX_SRC)
+    # shellcheck disable=SC2034
     SEARX_URL_PATH=$("${REPO_ROOT}/utils/searx.sh" --getenv SEARX_URL_PATH)
     nginx_install_app "${NGINX_MORTY_SITE}"