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

spruce.json

{"flavor":"1.14.0","prune":["meta"],"env":["HOME=/home/user"],"cherry_pick":[],"yaml":[{"filename":"file1.yml","contents":"---\nspruce-1-14:\n  days: 3\n  hours: (( calc \"3 * 24\" ))\n  minutes: (( calc \"3 * 24 * 60\" ))\n  \nhopeful:\n  days: 3\n  hours_expr: (( concat hopeful.days \" * 24\" ))\n  hours: (( calc hopeful.hours_expr ))\n  minutes_expr: (( concat hopeful.days \" * 24 * 60\" ))\n  minutes: (( calc minutes_expr ))\n  \nideal:\n  days: 3\n  hours: (( calc ideal.days * 24 ))\n  minutes: (( calc ideal.hours * 60 ))\n\nacceptable:\n  days: 3\n  # note the lack of a space before the '*' operator\n  hours: (( calc acceptable.days \"* 24\" ))\n  minute: (( calc acceptable.hours \"* 60\" ))\n"}],"skip_eval":false,"fallback_append":false,"go_patch":false,"debug":false,"trace":false}