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

spruce.json

{"flavor":"1.16.1","prune":["meta"],"env":["HOME=/home/user"],"cherry_pick":[],"yaml":[{"filename":"file1.yml","contents":"---\nlist:\n- name: one\n  version: v1\n- name: two\n  version: v1\n- name: three\n  version: v1\n- name: four\n  version: v1\n\n"},{"filename":"file2.yml","contents":"---\nlist:\n- name: eins\n  \u003c\u003c\u003c: (( inject list.one ))\n- name: zwei\n  \u003c\u003c\u003c: (( inject list.one ))\n- name: drei\n  \u003c\u003c\u003c: (( inject list.one ))\n- name: vier\n  \u003c\u003c\u003c: (( inject list.one ))\n\n"}],"skip_eval":false,"fallback_append":false,"go_patch":false,"debug":false,"trace":false}