add optional support for xdebug

app/Dockerfile

@@ -6,7 +6,7 @@ RUN apk add --no-cache dcron php8 php8-fpm \
 	php8-intl php8-xml php8-curl php8-session \
 	php8-dom php8-fileinfo php8-json php8-iconv \
 	php8-pcntl php8-posix php8-zip php8-openssl \
-	git postgresql-client sudo
+	git postgresql-client sudo php8-pecl-xdebug
 
 ENV SCRIPT_ROOT=/opt/tt-rss
 
@@ -26,6 +26,10 @@ RUN sed -i.bak 's/;clear_env = .*/clear_env = no/i' /etc/php8/php-fpm.d/www.conf
 ENV OWNER_UID=1000
 ENV OWNER_GID=1000
 
+ENV TTRSS_XDEBUG_ENABLED=""
+ENV TTRSS_XDEBUG_HOST=""
+ENV TTRSS_XDEBUG_PORT=""
+
 ENV TTRSS_DB_TYPE="pgsql"
 ENV TTRSS_DB_HOST="db"
 ENV TTRSS_DB_USER="%DB_USER"

app/startup.sh

@@ -77,6 +77,18 @@ cp ${SCRIPT_ROOT}/config.docker.php $DST_DIR/config.php
 # this was previously generated
 rm -f $DST_DIR/config.php.bak
 
+if [ ! -z "${TTRSS_XDEBUG_ENABLED}" ]; then
+	echo enabling xdebug with the following parameters:
+	env | grep TTRSS_XDEBUG
+	cat > /etc/php8/conf.d/50_xdebug.ini <<EOF
+zend_extension=xdebug.so
+xdebug.mode=develop,trace,debug
+xdebug.start_with_request = yes
+xdebug.client_port = ${TTRSS_XDEBUG_PORT}
+xdebug.client_host = ${TTRSS_XDEBUG_HOST}
+EOF
+fi
+
 cd $DST_DIR && sudo -E -u app php8 ./update.php --update-schema=force-yes
 
 touch $DST_DIR/.app_is_ready