ec-user-data 
A very simple library to access user-data on EC2 machines (or a configuration file called ${HOME}\.deployer.json
everywhere else).
This library first check of the existence of a file called ${HOME}\.deployer.json. If this file exists, the content
of the file is parsed and, if the file contains valid JSON, the content is returned.
If there is no ${HOME}\.deployer.json, the library tries to access
AWS Instance Metadata. In
particular, this library accesses information passed using the user-data field that can be passed when launching
an instance.
Example:
ec-user-data