Templates

Templates

Coyaml replaces placeholders inside strings after resolve_templates():

• ${{ env:VAR[:DEFAULT] }} — environment variables
• ${{ file:PATH }} — embed file contents (UTF‑8)
• ${{ config:PATH.TO.NODE }} — reference a value from the current config
• ${{ yaml:PATH }} — load and merge external YAML and resolve its templates recursively

Notes

• Resolution repeats until no templates are left in the resulting string
• config returning dict/list inside a string raises ValueError
• yaml cannot be used inside a string; use it as a standalone value
• Missing env variable without default raises ValueError
• Missing files raise FileNotFoundError

See tutorials for concrete examples.