Command line tool for processing template file using Go text/template syntax.
go get github.com/powerman/gotmpl
Or use static binary:
curl -s -L -o /usr/local/bin/gotmpl \
https://github.com/powerman/gotmpl/releases/download/v1.1.1/gotmpl-`uname -s`-`uname -m`
chmod +x /usr/local/bin/gotmpl
gotmpl <config.yaml.tmpl >config.yaml