gistfile1.txt

package test

import (
  "dagger.io/dagger"
  "dagger.io/dagger/core"
  "universe.dagger.io/docker"
)

dagger.#Plan & {
  actions: {
    rover: {
      alpine: docker.#Pull & {source: "alpine:3"}

      foocache: "/foo": {
        dest:     "/foo"
        type:     "cache"
        contents: core.#CacheDir & {
          id: "foo"
        }
      }

      writecache: docker.#Run & {
        input: alpine.image
        user: "root"
        command: name: "echo"
        command: args: [ "hello!", ">", "/foo/hello.txt" ]
        always: true
        mounts: foocache
      }

      readcache: docker.#Run & {
        input: alpine.image
        user: "root"
        command: name: "cat"
        command: args: [ "/foo/hello.txt" ]
        always: true
        env: DEP: "\(writecache.success)"
        mounts: foocache
      }
    }
  }
}