Enabling postgres for php

wercker.yml

box: wercker/php
services:
  - wercker/postgresql
# Build definition
build:
  # The steps that will be executed on build
  steps:
    - install-packages:
        name: install postgres extension
        packages: "php5-pgsql"
    - script:
        name: enable postgres extension for current php version
        code: |
          sudo find / -name pgsql.so | xargs echo "extension=$1" >> $HOME/.phpenv/versions/$(phpenv version-name)/etc/php.ini
          sudo find / -name pdo_pgsql.so | xargs echo "extension=$1" >> $HOME/.phpenv/versions/$(phpenv version-name)/etc/php.ini
          phpenv rehash
    - script:
        name: run some php script
        code: |
          # php -f db_test.php