package test import ( "dagger.io/dagger" "dagger.io/dagger/engine" "universe.dagger.io/docker" "universe.dagger.io/alpine" ) dagger.#Plan & { actions: { image: alpine.#Build run: docker.#Run & { "image": image.output command: { name: "sh" flags: "-c": #""" echo -n $TEST_MESSAGE >> /output.txt """# } env: TEST_MESSAGE: "hello world" } verify: engine.#ReadFile & { input: run.output.rootfs path: "/output.txt" } & { contents: "hello world" } } }