package testing import ( "dagger.io/llb" "dagger.io/dagger" ) source: dagger.#Artifact foo: "bar" bar: { string #up: [ llb.#FetchContainer & {ref: "busybox"}, llb.#Exec & { args: ["cp", "/source/testfile", "/out"] mount: "/source": from: source }, llb.#Export & { format: "string" source: "/out" }, ] }