SubVars

Substitute Variables (subvars) is a small utility which provides a way to render any Go templates from command line recognizing the object being passed in and drawing attributes from the object to create wanted text. It is very useful for template driven configuration files.

It uses sprig v3 for template functions which provides additional functions apart from standard library.

subvars reads input from stdin and renders output to stdout. You can pipe the input or < direct it to subvars.

Options to render all files in a given folder and output to another folder preserving folder and file structure is available via dir subcommand.