fix #426 (#430)

* fix #426

* fix logic to get versions

README.md

@@ -272,6 +272,13 @@ POSTGRES_MULTIPLE_EXTENSIONS=postgis,pgrouting:3.4.0
 where `pgrouting:3.4.0` The extension name is fixed with the version name with the delimiter being a
 colon.
 
+**Note** In some cases, some versions of extensions might not be available for
+install. To enable them you can do the following inside the container:
+```bash
+wget --directory-prefix /usr/share/postgresql/15/extension/ https://raw.githubusercontent.com/postgres/postgres/master/contrib/hstore/hstore--1.1--1.2.sql
+```
+Then proceed to install it the normal way.
+
 #### Shared preload libraries
 
 Some PostgreSQL extensions require shared_preload_libraries to be specified in the conf files.

scripts/env-data.sh

@@ -17,6 +17,7 @@ RECOVERY_CONF="$ROOT_CONF/recovery.conf"
 POSTGRES="/usr/lib/postgresql/${POSTGRES_MAJOR_VERSION}/bin/postgres"
 INITDB="/usr/lib/postgresql/${POSTGRES_MAJOR_VERSION}/bin/initdb"
 SQLDIR="/usr/share/postgresql/${POSTGRES_MAJOR_VERSION}/contrib/postgis-${POSTGIS_MAJOR}.${POSTGIS_MINOR_RELEASE}/"
+EXTDIR="/usr/share/postgresql/${POSTGRES_MAJOR_VERSION}/extension/"
 SETVARS="POSTGIS_ENABLE_OUTDB_RASTERS=1 POSTGIS_GDAL_ENABLED_DRIVERS=ENABLE_ALL"
 LOCALONLY="-c listen_addresses='127.0.0.1'"
 PG_BASEBACKUP="/usr/bin/pg_basebackup"
@@ -526,9 +527,25 @@ function extension_install() {
       psql ${DATABASE} -U ${POSTGRES_USER} -p 5432 -h localhost -c "CREATE EXTENSION IF NOT EXISTS \"${EXTENSION_NAME}\" cascade;"
     fi
   else
-    echo -e "\e[32m [Entrypoint] Installing extension \e[1;31m ${EXTENSION_NAME}  \e[32m with version \e[1;31m ${EXTENSION_VERSION} \e[32m in the database : \e[1;31m ${DATABASE} \033[0m"
     if [[ ${EXTENSION_NAME} != 'pg_cron' ]]; then
-      psql ${DATABASE} -U ${POSTGRES_USER} -p 5432 -h localhost -c "CREATE EXTENSION IF NOT EXISTS \"${EXTENSION_NAME}\" WITH VERSION '${EXTENSION_VERSION}' cascade;"
+      pattern="${EXTENSION_NAME}--"
+      last_numbers=()
+      for file in "$EXTDIR"/${pattern}*; do
+        filename=$(basename "$file" .sql)
+        if [[ "$filename" == *"--"* ]]; then
+          last_number=$(echo "$filename" | awk -F '--' '{print $NF}')
+          if [[ ! " ${last_numbers[@]} " =~ " $last_number " ]]; then
+    	      last_numbers+=("$last_number")
+          fi
+        fi
+      done
+      if [[ " ${last_numbers[@]} " =~ " $EXTENSION_VERSION " ]]; then
+        echo -e "\e[32m [Entrypoint] Installing extension \e[1;31m ${EXTENSION_NAME}  \e[32m with version \e[1;31m ${EXTENSION_VERSION} \e[32m in the database : \e[1;31m ${DATABASE} \033[0m"
+        psql ${DATABASE} -U ${POSTGRES_USER} -p 5432 -h localhost -c "CREATE EXTENSION IF NOT EXISTS \"${EXTENSION_NAME}\" WITH VERSION '${EXTENSION_VERSION}' cascade;"
+      else
+        echo -e "\e[32m [Entrypoint] Extension \e[1;31m ${EXTENSION_NAME}  \e[32m with version \e[1;31m ${EXTENSION_VERSION} \e[32m is not available for install, available versions to install are \e[1;31m  "${last_numbers[@]}" \033[0m"
+      fi
+
     fi
   fi