Added support for the postgresql backend.

Dockerfile

@@ -9,7 +9,14 @@ LABEL maintainer="sparklyballs"
 
 # environment variables
 ENV HOME="/config" \
-MINETEST_SUBGAME_PATH="/config/.minetest/games"
+MINETEST_SUBGAME_PATH="/config/.minetest/games" \
+WORLD_NAME="world" \
+BACKEND="postgresql" \
+PG_HOST="" \
+PG_DB="minetest" \
+PG_USER="minetest" \
+PG_PASS="minetest" \
+PG_PORT=5432
 
 # build variables
 ARG LDFLAGS="-lintl"
@@ -39,6 +46,7 @@ RUN \
 	make \
 	mesa-dev \
 	openal-soft-dev \
+	postgresql-dev \
 	python-dev \
 	sqlite-dev && \
  apk add --no-cache --virtual=build-dependencies-2 \
@@ -51,6 +59,7 @@ RUN \
 	hiredis \
 	libgcc \
 	libintl \
+        libpq \
 	libstdc++ \
 	luajit \
 	lua-socket \
@@ -96,6 +105,9 @@ RUN \
 	-DENABLE_REDIS=1 \
 	-DENABLE_SOUND=0 \
 	-DENABLE_SYSTEM_GMP=1 \
+    -DENABLE_POSTGRESQL=1 \
+    -DPOSTGRESQL_CONFIG_EXECUTABLE=/usr/bin/pg_config \
+    -DPOSTGRESQL_LIBRARY=/usr/lib/libpq.so \
 	-DRUN_IN_PLACE=0 && \
  make -j 2 && \
  make install && \

root/etc/cont-init.d/30-config

@@ -14,6 +14,22 @@ if [ ! -d "/config/.minetest/games/minimal" ]; then
 cp -pr /defaults/games/* /config/.minetest/games/
 fi
 
+# postgres
+if [ "$BACKEND" = "postgresql" ]
+   then
+	   WORLD_MT="/config/.minetest/worlds/$WORLD_NAME/world.mt"
+	   if [ -f $WORLD_MT ]
+	   then
+		   TMP_WORLD_MT=$(mktemp)
+		   egrep -v '^(backend|pgsql_connection)\s*=' $WORLD_MT > $TMP_WORLD_MT
+		   echo -e "backend = $BACKEND\npgsql_connection = host=$PG_HOST port=$PG_PORT dbname=$PG_DB user=$PG_USER password=$PG_PASS" > $WORLD_MT
+		   cat $TMP_WORLD_MT >> $WORLD_MT && rm $TMP_WORLD_MT
+	   else
+		   mkdir -p "/config/.minetest/worlds/$WORLD_NAME"
+		   echo -e "gameid = minetest\nbackend = $BACKEND\npgsql_connection = host=$PG_HOST port=$PG_PORT dbname=$PG_DB user=$PG_USER password=$PG_PASS" >> $WORLD_MT
+	   fi
+fi
+
 # permissions
 chown -R abc:abc \
 	/config