Introduce a new run binary, which is the new docker-app CNAB "backend".

In future commits, the docker-app binary will be mutated as a frontend, and all the installation logic will be moved to the run binary.
run comes with the 4 CNAB core commands: install/uninstall/status/upgrade.

Adds github.com/deislabs/duffle as vendoring

Signed-off-by: Silvin Lubecki <silvin.lubecki@docker.com>

Author: silvin-lubecki

Dockerfile

@@ -37,3 +37,11 @@ RUN make EXPERIMENTAL=${EXPERIMENTAL} cross
 FROM cross AS e2e-cross
 ARG EXPERIMENTAL="off"
 RUN make EXPERIMENTAL=${EXPERIMENTAL} e2e-cross
+
+# builder of invocation image entrypoint
+FROM build AS invocation-build
+COPY . .
+ARG EXPERIMENTAL="off"
+ARG TAG
+ARG COMMIT
+RUN make EXPERIMENTAL=${EXPERIMENTAL} TAG=${TAG} COMMIT=${COMMIT} bin/run

Gopkg.lock

@@ -29,7 +29,13 @@ required = ["github.com/wadey/gocovmerge"]
 
 [[constraint]]
   name = "github.com/docker/cli"
-  branch = "master"
+  branch = "expose-stack-commands-1500"
+  source = "github.com/silvin-lubecki/cli"
+
+[[constraint]]
+  name = "github.com/deis/duffle"
+  branch = "dockercon-version"
+  source = "git@github.com:simonferquel/duffle.git"
 
 [[constraint]]
   name = "github.com/sirupsen/logrus"

Gopkg.toml

@@ -0,0 +1,41 @@
+package main
+
+import (
+	"os"
+
+	"github.com/docker/cli/cli/command"
+	cliconfig "github.com/docker/cli/cli/config"
+	"github.com/docker/cli/cli/context/docker"
+	kubcontext "github.com/docker/cli/cli/context/kubernetes"
+	contextstore "github.com/docker/cli/cli/context/store"
+	cliflags "github.com/docker/cli/cli/flags"
+)
+
+const (
+	envVarOchestrator = "DOCKER_STACK_ORCHESTRATOR"
+	fileDockerContext = "/cnab/app/context.dockercontext"
+)
+
+var storeConfig = contextstore.NewConfig(
+	func() interface{} { return &command.DockerContext{} },
+	contextstore.EndpointTypeGetter(docker.DockerEndpoint, func() interface{} { return &docker.EndpointMeta{} }),
+	contextstore.EndpointTypeGetter(kubcontext.KubernetesEndpoint, func() interface{} { return &kubcontext.EndpointMeta{} }),
+)
+
+func setupDockerContext() (command.Cli, error) {
+	s := contextstore.New(cliconfig.ContextStoreDir(), storeConfig)
+	f, err := os.Open(fileDockerContext)
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+	if err := contextstore.Import("cnab", s, f); err != nil {
+		return nil, err
+	}
+	cli := command.NewDockerCli(os.Stdin, os.Stdout, os.Stderr, false, nil)
+	return cli, cli.Initialize(&cliflags.ClientOptions{
+		Common: &cliflags.CommonOptions{
+			Context: "cnab",
+		},
+	})
+}