Escaping

Write $${{ to put a literal ${{ in a value.

Terminal

ferry env set api 'GREETING_TEMPLATE=Hello $${{ name }}'
# → GREETING_TEMPLATE=Hello ${{ name }} in the container

Ferry reads ${{ as the start of a reference. To put a literal ${{ in a value, escape it: write $${{.

The rule

You write	The container gets
`$${{ name }}`	`${{ name }}`

Ferry keeps all the text after $${{, up to }}, as plain text.

See Syntax for the full grammar.

Precedence

Ferry builds the environment in three layers, then resolves the references.

References in a blueprint

In a blueprint, Ferry changes each fromDatabase and fromService entry into a reference.