gomplate

Command-line tool for rendering templates before executing binaries

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.