#!/bin/sh

usage() {
  echo "Usage: $0 [OPTION]"
  echo 
  echo "Configuration:"
  echo "  --help                 display this help and exit"
  echo "  --with-pgport=NUM      access PostgreSQL server on TCP port NUM"
}

PGPORT=5432

while test -n "$1"; do
  case "$1" in
    --help|-h)
      usage
      exit 0
      ;;
    --with-pgport=*)
      PGPORT=`echo "$1" | cut -d= -f2`
      ;;
    *)
      echo "Unknown option '$1'" >&2
      usage >&2
      exit 1
  esac
  shift
done

echo "PGPORT: $PGPORT"

# TODO: allow specifying configuration settings !
for f in config/environments/*.example; do
  o=`dirname "$f"`/`basename "$f" .example`
  echo "Writing $o"
  # See http://austinmatzko.com/2008/04/26/sed-multi-line-search-and-replace/
  sed -n "1h;1!H;\${;g;s/\(,postgres: {[^}]*port: *'\?\)[^',]*\('\?,\)/\1$PGPORT\2/;p;}" < "$f" > "$o"
done