nginx: normalize installation (docs and script)s over all distros

This is the revision of the documentation about the varous nginx installation
variants.  It also implements the nginx installation scripts for morty and
filtron.

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

utils/morty.sh

@@ -47,6 +47,7 @@ CONFIG_FILES=()
 # Apache Settings
 
 APACHE_MORTY_SITE="morty.conf"
+NGINX_MORTY_SITE="morty.conf"
 
 # ----------------------------------------------------------------------------
 usage() {
@@ -54,9 +55,7 @@ usage() {
 
     # shellcheck disable=SC1117
     cat <<EOF
-
 usage::
-
   $(basename "$0") shell
   $(basename "$0") install    [all|user]
   $(basename "$0") update     [morty]
@@ -66,6 +65,7 @@ usage::
   $(basename "$0") inspect    [service]
   $(basename "$0") option     [debug-on|debug-off]
   $(basename "$0") apache     [install|remove]
+  $(basename "$0") nginx      [install|remove]
   $(basename "$0") info       [searx]
 
 shell
@@ -86,6 +86,9 @@ option
 apache : ${PUBLIC_URL_MORTY}
   :install: apache site with a reverse proxy (ProxyPass)
   :remove:  apache site ${APACHE_MORTY_SITE}
+nginx (${PUBLIC_URL_MORTY})
+  :install: nginx site with a reverse proxy (ProxyPass)
+  :remove:  nginx site ${NGINX_MORTY_SITE}
 
 If needed, set the environment variables in the '${DOT_CONFIG#"$REPO_ROOT/"}' file::
   PUBLIC_URL_MORTY:     ${PUBLIC_URL_MORTY}
@@ -122,8 +125,6 @@ EOF
 }
 
 main() {
-    rst_title "$SERVICE_NAME" part
-
     required_commands \
         sudo install git wget curl \
         || exit
@@ -131,7 +132,7 @@ main() {
     local _usage="ERROR: unknown or missing $1 command $2"
 
     case $1 in
-        --source-only)  ;;
+        --getenv)  var="$2"; echo "${!var}"; exit 0;;
         -h|--help) usage; exit 0;;
 
         shell)
@@ -147,6 +148,7 @@ main() {
                 *) usage "$_usage"; exit 42;;
             esac ;;
         install)
+            rst_title "$SERVICE_NAME" part
             sudo_or_exit
             case $2 in
                 all) install_all ;;
@@ -185,6 +187,13 @@ main() {
                 remove) remove_apache_site ;;
                 *) usage "$_usage"; exit 42;;
             esac ;;
+        nginx)
+            sudo_or_exit
+            case $2 in
+                install) install_nginx_site ;;
+                remove) remove_nginx_site ;;
+                *) usage "$_usage"; exit 42;;
+            esac ;;
         info)
             case $2 in
                 searx) info_searx ;;
@@ -348,8 +357,8 @@ EOF
         wait_key
     fi
 
-    if ! service_is_available "${PUBLIC_URL}"; then
-        warn_msg "Public service at ${PUBLIC_URL} is not available!"
+    if ! service_is_available "${PUBLIC_URL_MORTY}"; then
+        warn_msg "Public service at ${PUBLIC_URL_MORTY} is not available!"
         if ! in_container; then
             warn_msg "Check if public name is correct and routed or use the public IP from above."
         fi
@@ -363,7 +372,7 @@ EOF
     fi
 
     local _debug_on
-    if ask_yn "Enable filtron debug mode (needs reinstall of systemd service)?"; then
+    if ask_yn "Enable morty debug mode (needs reinstall of systemd service)?"; then
         enable_debug
         _debug_on=1
     else
@@ -436,6 +445,50 @@ This removes apache site ${APACHE_MORTY_SITE}."
     apache_remove_site "$APACHE_MORTY_SITE"
 }
 
+install_nginx_site() {
+
+    rst_title "Install nginx site $NGINX_MORTY_SITE"
+
+    rst_para "\
+This installs a reverse proxy (ProxyPass) into nginx site (${NGINX_MORTY_SITE})"
+
+    ! nginx_is_installed && err_msg "nginx is not installed."
+
+    if ! ask_yn "Do you really want to continue?" Yn; then
+        return
+    else
+        install_nginx
+    fi
+
+    "${REPO_ROOT}/utils/searx.sh" install uwsgi
+
+    SEARX_SRC=$("${REPO_ROOT}/utils/searx.sh" --getenv SEARX_SRC)
+    SEARX_URL_PATH=$("${REPO_ROOT}/utils/searx.sh" --getenv SEARX_URL_PATH)
+    nginx_install_app "${NGINX_MORTY_SITE}"
+
+    info_msg "testing public url .."
+    if ! service_is_available "${PUBLIC_URL_MORTY}"; then
+        err_msg "Public service at ${PUBLIC_URL_MORTY} is not available!"
+    fi
+}
+
+remove_nginx_site() {
+
+    rst_title "Remove nginx site $NGINX_MORTY_SITE"
+
+    rst_para "\
+This removes nginx site ${NGINX_MORTY_SITE}."
+
+    ! nginx_is_installed && err_msg "nginx is not installed."
+
+    if ! ask_yn "Do you really want to continue?" Yn; then
+        return
+    fi
+
+    nginx_remove_site "$NGINX_MORTY_SITE"
+
+}
+
 rst-doc() {
 
     eval "echo \"$(< "${REPO_ROOT}/docs/build-templates/morty.rst")\""