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

spruce.json

{"flavor":"1.29.0","prune":["meta"],"env":["HOME=/home/user"],"cherry_pick":[],"yaml":[{"filename":"file1.yml","contents":"--- # cloud config\nnetworks:\n- name: prod\n  subnets:\n  - gateway: 10.0.1.1\n    range: 10.0.1.0/24\n    static: [ 10.0.1.2 - 10.0.1.10 ]\n\n\n\n\n\n"},{"filename":"file2.yml","contents":"--- # job definitions\ninstance_groups:\n- name: haproxy\n  instances: 2\n  jobs:\n  - { name: haproxy, release: haproxy }\n  networks:\n  - name: prod\n    static_ips: (( static_ips(0, 1) ))\n\nazs:           (( prune ))\ncompilation:   (( prune ))\ndisk_types:    (( prune ))\nnetworks:      (( prune ))\nvm_extensions: (( prune ))\nvm_types:      (( prune ))\n\n\n\n"}],"skip_eval":false,"fallback_append":false,"go_patch":false,"debug":false,"trace":false}