Define constants for credential paths.

Right now this is just the docker context.

Signed-off-by: Ian Campbell <ijc@docker.com>

Author: Ian Campbell

cmd/cnab-run/env.go

@@ -3,6 +3,7 @@ package main
 import (
 	"os"
 
+	"github.com/docker/app/internal"
 	"github.com/docker/cli/cli/command"
 	cliconfig "github.com/docker/cli/cli/config"
 	"github.com/docker/cli/cli/context/docker"
@@ -11,10 +12,6 @@ import (
 	cliflags "github.com/docker/cli/cli/flags"
 )
 
-const (
-	fileDockerContext = "/cnab/app/context.dockercontext"
-)
-
 var storeConfig = contextstore.NewConfig(
 	func() interface{} { return &command.DockerContext{} },
 	contextstore.EndpointTypeGetter(docker.DockerEndpoint, func() interface{} { return &docker.EndpointMeta{} }),
@@ -23,7 +20,7 @@ var storeConfig = contextstore.NewConfig(
 
 func setupDockerContext() (command.Cli, error) {
 	s := contextstore.New(cliconfig.ContextStoreDir(), storeConfig)
-	f, err := os.Open(fileDockerContext)
+	f, err := os.Open(internal.CredentialDockerContextPath)
 	if err != nil {
 		return nil, err
 	}

internal/names.go

@@ -34,6 +34,8 @@ const (
 
 	// CredentialDockerContextName is the name of the credential containing a Docker context
 	CredentialDockerContextName = "docker.context"
+	// CredentialDockerContextPath is the path to the credential containing a Docker context
+	CredentialDockerContextPath = "/cnab/app/context.dockercontext"
 
 	// DockerStackOrchestratorEnvVar is the environment variable set by the CNAB runtime to select
 	// the stack orchestrator.

internal/packager/cnab.go

@@ -92,7 +92,7 @@ func ToCNAB(app *types.App, invocationImageName string) (*bundle.Bundle, error)
 	return &bundle.Bundle{
 		Credentials: map[string]bundle.Location{
 			internal.CredentialDockerContextName: {
-				Path: "/cnab/app/context.dockercontext",
+				Path: internal.CredentialDockerContextPath,
 			},
 		},
 		Description: app.Metadata().Description,