Prepare optional webgui setup (Apache, nginx, lighttpd)

debian/postinst

@@ -3,6 +3,28 @@ set -e
 
 . /usr/share/debconf/confmodule
 
+detect_webservers()
+{
+    WEB_SERVERS=""
+
+    if dpkg-query -W -f='${Status}' apache2 2>/dev/null |
+        grep -q 'install ok installed'; then
+        WEB_SERVERS="$WEB_SERVERS apache2"
+    fi
+
+    if dpkg-query -W -f='${Status}' nginx 2>/dev/null |
+        grep -q 'install ok installed'; then
+        WEB_SERVERS="$WEB_SERVERS nginx"
+    fi
+
+    if dpkg-query -W -f='${Status}' lighttpd 2>/dev/null |
+        grep -q 'install ok installed'; then
+        WEB_SERVERS="$WEB_SERVERS lighttpd"
+    fi
+
+    WEB_SERVERS="${WEB_SERVERS# }"
+}
+
 db_get yms/db-name
 DB_NAME="$RET"
 
@@ -30,7 +52,42 @@ fi
 
 db_get yms/webgui
 if [ "$RET" = "true" ]; then
-    # use web gui, depends on available web server
+
+    detect_webservers
+    case "$WEB_SERVERS" in
+    "")
+        echo "No supported webserver installed."
+        ;;
+    apache2)
+        echo "Apache detected."
+        a2enconf yms
+        invoke-rc.d apache2 reload
+        echo "Web GUI for apache2 enabled."
+        ;;
+    nginx)
+        echo "nginx detected."
+        ;;
+    lighttpd)
+        echo "lighttpd detected."
+        ;;
+    *)
+        echo "Multiple webservers detected: $WEB_SERVERS"
+        ;;
+    esac
+
+    if [ ! -f /etc/yms/config.inc ]; then
+        # create initial configuration
+        sed \
+            -e "s|@DB_USERNAME@|$DB_USER|g" \
+            -e "s|@DB_PASSWORD@|$DB_PASSWORD|g" \
+            -e "s|@DB_SCHEMA@|$DB_NAME|g" \
+            /usr/share/yms/config.inc-sample \
+            > /etc/yms/config.inc
+        chmod 0640 /etc/yms/config.inc
+        chown root:www-data /etc/yms/config.inc
+        ln -s /etc/yms/config.inc /usr/share/yms/webgui/config.inc
+    fi
+
 fi
 
 exit 0