Config_Substitutions

Configuration Substitutions

Version 3.6 onwards addresses a couple of issues around the use of configuration files. It introduces 2 new concepts

Ability to autoload values from license.keys into config data. By specifying a config item as LICENSE_KEY:VALUE it will replace the value in license.keys into the config data. This means config such as

client:
  email:
    username: LICENSE_KEY:EMAIL_USERNAME
    password:LICENSE_KEY:EMAIL_PASSWORD

Can use the username and password values stored in license keys as

[email protected]
EMAIL_PASSWORD=pavingslabs

This is a clean way of keeping config files free of secure data and keeping license.keys out of GitHub by using .gitignore

Ability to pass a substitutions.txt file as a command line parameter. Values in this file will be automatically replaced in your config file, e.g

client:
  email:
    host: $EMAIL_HOST
    port: $EMAIL_PORT

You can then have multiple substitutions.txt files with different values

$EMAIL_HOST:prod_server.com
$EMAIL_PORT:9999

and

$EMAIL_HOST:test_server.com
$EMAIL_PORT:888

By just passing in the subs file as '-subs substitutions.txt' you can keep one config file and just change environment settings.