Gomplate is a template-based CLI tool. gomplate supports additional
template datasources such as: JSON, YAML, AWS EC2 metadata, BoltDB,
sockaddr, Hashicorp Consul, and Hashicorp Vault secrets.

Gomplate lets you process templates which also include shell-like
variables. Also there are some useful built-in functions that can be
used to make templates even more expressive.

WWW: https://gomplate.hairyhenderson.ca