Ruby script to use Puppets erb/hiera features without the need to have puppet installed.
It can puppet apply --hiera_config hiera.yaml --execute "file {'/tmp/oops': content => template('$PWD/my-template.erb')}"
and commands similar to it.
We use it at Spreadshirt to generate Kubernetes configuration for different environments, including secrets from a credentials store.
We suggest to use erb-hiera-generator with docker to avoid dependency problems on your local machine.
docker -t build erb-hiera-generator .
a) Usage with docker
docker run -v $(pwd)/hiera.yaml:/params/hiera.yaml -v $(pwd)/test.erb:/params/template -v $(pwd)/test.result:/params/outputfile --rm erb-hiera-generator
Attention: Make sure the file $(pwd)/test.result exists before running the docker command as it otherwise will became a folder that can not be used by erb-hiera-generator.
b) Native usage
You can of course use erb-hiera-generator without docker when all dependencies are installed. (gem install facter hiera should do that for you.)
./erb-hiera-generator.rb path/to/hiera.yaml path/to/template path/to/output
Be aware of the fact that erb-hiera-generator will overwrite the output file.