feat: implement undeploy command

cli/app/undeploy.go

@@ -1,7 +1,49 @@
 package app
 
-import "github.com/urfave/cli/v2"
+import (
+	"context"
+	"errors"
+
+	"coopcloud.tech/abra/cli/internal"
+	"coopcloud.tech/abra/client"
+	"coopcloud.tech/abra/client/swarm"
+	"coopcloud.tech/abra/config"
+	"github.com/docker/cli/cli/command/stack/options"
+	"github.com/sirupsen/logrus"
+	"github.com/urfave/cli/v2"
+)
 
 var appUndeployCommand = &cli.Command{
-	Name: "undeploy",
+	Name:  "undeploy",
+	Usage: "Undeploy an app",
+	Action: func(c *cli.Context) error {
+		appName := c.Args().First()
+		if appName == "" {
+			internal.ShowSubcommandHelpAndError(c, errors.New("no app name provided"))
+		}
+
+		appFiles, err := config.LoadAppFiles("")
+		if err != nil {
+			logrus.Fatal(err)
+		}
+
+		appEnv, err := config.GetApp(appFiles, appName)
+		if err != nil {
+			logrus.Fatal(err)
+		}
+
+		ctx := context.Background()
+		host := appFiles[appName].Server
+		cl, err := client.NewClientWithContext(host)
+		if err != nil {
+			logrus.Fatal(err)
+		}
+
+		rmOpts := options.Remove{Namespaces: []string{appEnv.StackName()}}
+		if err := swarm.RunRemove(ctx, cl, rmOpts); err != nil {
+			logrus.Fatal(err)
+		}
+
+		return nil
+	},
 }