Add support for locale and encoding, fix #406

Author: mscherer

src/root/usr/share/container-scripts/postgresql/README.md

@@ -74,6 +74,13 @@ initialization by passing `-e VAR=VALUE` to the Docker run command.
 **`POSTGRESQL_ADMIN_PASSWORD`**  
        Password for the `postgres` admin account (optional)
 
+The following environment variables are optional, and only used when the database is initialzed
+
+**`POSTGRESQL_ENCODING`**
+	Database encoding. Default to UTF8
+
+**`POSTGRESQL_LOCALE`**
+	Database locale. Default to en_US
 
 Alternatively, the following options are related to migration scenario:
 

src/root/usr/share/container-scripts/postgresql/common.sh

@@ -190,7 +190,10 @@ initdb_wrapper ()
   # Initialize the database cluster with utf8 support enabled by default.
   # This might affect performance, see:
   # http://www.postgresql.org/docs/{{ spec.version }}/static/locale.html
-  LANG=${LANG:-en_US.utf8} "$@"
+  ENCODING=${POSTGRESQL_ENCODING:-UTF8}
+  LOCALE=${POSTGRESQL_LOCALE:-en_US}
+  if [ ${LOCALE} == "C" ] ; then LANG=C; fi
+  LANG=${LANG:-$LOCALE.$ENCODING} "$@" -E $ENCODING
 }
 
 function initialize_database() {
@@ -223,7 +226,16 @@ EOF
 function create_users() {
   if [[ ",$postinitdb_actions," = *,simple_db,* ]]; then
     createuser "$POSTGRESQL_USER"
-    createdb --owner="$POSTGRESQL_USER" "$POSTGRESQL_DATABASE"
+
+    EXTRA_ARGS=""
+    if [ -v POSTGRESQL_ENCODING ]; then
+       EXTRA_ARGS="$EXTRA_ARGS -E $POSTGRESQL_ENCODING"
+    fi
+    if [ -v POSTGRESQL_LOCALE ]; then
+       EXTRA_ARGS="$EXTRA_ARGS -l $POSTGRESQL_LOCALE"
+    fi
+
+    createdb $EXTRA_ARGS --owner="$POSTGRESQL_USER" "$POSTGRESQL_DATABASE"
   fi
 
   if [ -v POSTGRESQL_MASTER_USER ]; then