Initial cdb_geocoder_server commit

server/sql/0.0.1/00_header.sql

@@ -0,0 +1,2 @@
+-- Complain if script is sourced in psql, rather than via CREATE EXTENSION
+\echo Use "CREATE EXTENSION cdb_geocoder_server" to load this file. \quit

server/sql/0.0.1/10_helper.sql

@@ -0,0 +1,19 @@
+-- Check if a given host is up by performing a ping -c 1 call.
+CREATE OR REPLACE FUNCTION check_host(hostname TEXT)
+  RETURNS BOOLEAN
+AS $$
+  import os
+
+  response = os.system("ping -c 1 " + hostname)
+
+  return False if response else True
+$$ LANGUAGE plpythonu VOLATILE;
+
+-- Returns current pwd
+CREATE OR REPLACE FUNCTION pwd()
+  RETURNS TEXT
+AS $$
+  import os
+
+  return os.getcwd()
+$$ LANGUAGE plpythonu VOLATILE;