feat: Retrieves auth token from image

This allows using a private registry for an image.
To use it, you have to run docker login on your local machine before
running abra deploy.

pkg/upstream/stack/stack.go

@@ -17,6 +17,7 @@ import (
 	"coopcloud.tech/abra/pkg/log"
 	"coopcloud.tech/abra/pkg/ui"
 	"coopcloud.tech/abra/pkg/upstream/convert"
+	"github.com/docker/cli/cli/command"
 	"github.com/docker/cli/cli/command/stack/formatter"
 	composetypes "github.com/docker/cli/cli/compose/types"
 	"github.com/docker/docker/api/types"
@@ -426,7 +427,8 @@ func deployServices(
 	services map[string]swarm.ServiceSpec,
 	namespace convert.Namespace,
 	sendAuth bool,
-	resolveImage string) ([]ui.ServiceMeta, error) {
+	resolveImage string,
+) ([]ui.ServiceMeta, error) {
 	var servicesMeta []ui.ServiceMeta
 
 	existingServices, err := GetStackServices(ctx, cl, namespace.Name())
@@ -446,6 +448,21 @@ func deployServices(
 			encodedAuth string
 		)
 
+		// When sendAuth is set, use the docker cli to retrieve the auth token
+		// for the image we are deploying.
+		// This enables using a private registry by running docker login on the
+		// machine, that abra is executed.
+		if sendAuth {
+			dockerCLI, err := command.NewDockerCli()
+			if err != nil {
+				log.Errorf("retrieving docker auth token: failed create docker cli: %s", err)
+			}
+			encodedAuth, err = command.RetrieveAuthTokenFromImage(dockerCLI.ConfigFile(), image)
+			if err != nil {
+				log.Errorf("failed to retrieve registry auth for image %s: %s", image, err)
+			}
+		}
+
 		if service, exists := existingServiceMap[name]; exists {
 			log.Debugf("updating %s", name)
 
@@ -587,7 +604,7 @@ func WaitOnServices(ctx context.Context, cl *dockerClient.Client, opts WaitOpts)
 				fmt.Sprintf("%s_%s", opts.AppName, timestamp()),
 			)
 
-			if err := os.MkdirAll(filepath.Join(config.LOGS_DIR, opts.ServerName), 0764); err != nil {
+			if err := os.MkdirAll(filepath.Join(config.LOGS_DIR, opts.ServerName), 0o764); err != nil {
 				return fmt.Errorf("waitOnServices: error creating log dir: %s", err)
 			}