a bit o' spruce, from http://play.spruce.cf

spruce.json

{"flavor":"1.11.0","prune":["meta"],"env":["HOME=/home/user"],"cherry_pick":[],"yaml":[{"filename":"file1.yml","contents":"users:\n  geoff:\n    groups: geoff, sudoers\n    home: /home/geoff\n    shell: /bin/bash\n  admin:\n    groups: admin, sudoers\n    home: /home/administrator\n    shell: /bin/zsh\n\nuser_names: (( keys users ))\n\n\n\n"}],"skip_eval":false,"fallback_append":false,"go_patch":false,"debug":false,"trace":false}