AB#2309 constellation upgrade execute (#2)

Signed-off-by: Daniel Weiße <dw@edgeless.systems>

cli/internal/cmd/upgradeexecute.go

@@ -0,0 +1,53 @@
+package cmd
+
+import (
+	"context"
+
+	"github.com/edgelesssys/constellation/cli/internal/cloudcmd"
+	"github.com/edgelesssys/constellation/internal/config"
+	"github.com/edgelesssys/constellation/internal/file"
+	"github.com/spf13/afero"
+	"github.com/spf13/cobra"
+)
+
+func newUpgradeExecuteCmd() *cobra.Command {
+	cmd := &cobra.Command{
+		Use:   "execute",
+		Short: "Execute an upgrade of a Constellation cluster",
+		Long:  "Execute an upgrade of a Constellation cluster by applying the chosen configuration.",
+		Args:  cobra.NoArgs,
+		RunE:  runUpgradeExecute,
+	}
+
+	return cmd
+}
+
+func runUpgradeExecute(cmd *cobra.Command, args []string) error {
+	fileHandler := file.NewHandler(afero.NewOsFs())
+	upgrader, err := cloudcmd.NewUpgrader(cmd.OutOrStdout())
+	if err != nil {
+		return err
+	}
+
+	return upgradeExecute(cmd, upgrader, fileHandler)
+}
+
+func upgradeExecute(cmd *cobra.Command, upgrader cloudUpgrader, fileHandler file.Handler) error {
+	configPath, err := cmd.Flags().GetString("config")
+	if err != nil {
+		return err
+	}
+	config, err := config.FromFile(fileHandler, configPath)
+	if err != nil {
+		return err
+	}
+
+	// TODO: validate upgrade config? Should be basic things like checking image is not an empty string
+	// More sophisticated validation, like making sure we don't downgrade the cluster, should be done by `constellation upgrade plan`
+
+	return upgrader.Upgrade(cmd.Context(), config.Upgrade.Image, config.Upgrade.Measurements)
+}
+
+type cloudUpgrader interface {
+	Upgrade(ctx context.Context, image string, measurements map[uint32][]byte) error
+}