update with latest build versions, includes custom build for postgres and migrating from v16 to v18

build/postgresql-postgis/update-postgis.sh

@@ -0,0 +1,28 @@
+#!/bin/sh
+
+set -e
+
+# Perform all actions as $POSTGRES_USER
+export PGUSER="$POSTGRES_USER"
+
+POSTGIS_VERSION="${POSTGIS_VERSION%%+*}"
+
+# Load PostGIS into both template_database and $POSTGRES_DB
+for DB in template_postgis "$POSTGRES_DB" "${@}"; do
+    echo "Updating PostGIS extensions '$DB' to $POSTGIS_VERSION"
+    psql --dbname="$DB" -c "
+        -- Upgrade PostGIS (includes raster)
+        CREATE EXTENSION IF NOT EXISTS postgis VERSION '$POSTGIS_VERSION';
+        ALTER EXTENSION postgis UPDATE TO '$POSTGIS_VERSION';
+
+        -- Upgrade Topology
+        CREATE EXTENSION IF NOT EXISTS postgis_topology VERSION '$POSTGIS_VERSION';
+        ALTER EXTENSION postgis_topology UPDATE TO '$POSTGIS_VERSION';
+
+        -- Install Tiger dependencies in case not already installed
+        CREATE EXTENSION IF NOT EXISTS fuzzystrmatch;
+        -- Upgrade US Tiger Geocoder
+        CREATE EXTENSION IF NOT EXISTS postgis_tiger_geocoder VERSION '$POSTGIS_VERSION';
+        ALTER EXTENSION postgis_tiger_geocoder UPDATE TO '$POSTGIS_VERSION';
+    "
+done