Make unattended reset work (#110)

Our current example for cloud images on the docs on how to use the reset
with a cloud-config and a stage does not actually work as the tty
adquisition and such seems to be failing due tto not being properly run
in a tty.

This pathc introduces 2 new flags to the reset command.

reboot: Enable reboot after reset, overriding any config in the system.
This is only a enable switch, so if the flag is disabled but the config
says reset it will NOT override it.

unattended: Disables printing stuff into the screen, locking the
terminal and falling back to a new tty on run. Also enables fast mode
automatically.

Signed-off-by: Itxaka <itxaka@kairos.io>

internal/agent/reset.go

@@ -3,10 +3,6 @@ package agent
 import (
 	"encoding/json"
 	"fmt"
-	"os"
-	"sync"
-	"time"
-
 	hook "github.com/kairos-io/kairos-agent/v2/internal/agent/hooks"
 	"github.com/kairos-io/kairos-agent/v2/internal/bus"
 	"github.com/kairos-io/kairos-agent/v2/internal/cmd"
@@ -16,43 +12,48 @@ import (
 	"github.com/kairos-io/kairos-sdk/collector"
 	"github.com/kairos-io/kairos-sdk/machine"
 	"github.com/kairos-io/kairos-sdk/utils"
+	"os"
+	"sync"
+	"time"
 
 	"github.com/mudler/go-pluggable"
 )
 
-func Reset(dir ...string) error {
+func Reset(reboot, unattended bool, dir ...string) error {
 	bus.Manager.Initialize()
-
-	cmd.PrintBranding(DefaultBanner)
-
+	
 	// This config is only for reset branding.
 	agentConfig, err := LoadConfig()
 	if err != nil {
 		return err
 	}
 
-	cmd.PrintText(agentConfig.Branding.Reset, "Reset")
+	if !unattended {
+		cmd.PrintBranding(DefaultBanner)
+		cmd.PrintText(agentConfig.Branding.Reset, "Reset")
 
-	// We don't close the lock, as none of the following actions are expected to return
-	lock := sync.Mutex{}
-	go func() {
-		// Wait for user input and go back to shell
-		utils.Prompt("") //nolint:errcheck
-		// give tty1 back
-		svc, err := machine.Getty(1)
-		if err == nil {
-			svc.Start() //nolint:errcheck
+		// We don't close the lock, as none of the following actions are expected to return
+		lock := sync.Mutex{}
+		go func() {
+			// Wait for user input and go back to shell
+			utils.Prompt("") //nolint:errcheck
+			// give tty1 back
+			svc, err := machine.Getty(1)
+			if err == nil {
+				svc.Start() //nolint:errcheck
+			}
+
+			lock.Lock()
+			fmt.Println("Reset aborted")
+			panic(utils.Shell().Run())
+		}()
+
+		if !agentConfig.Fast {
+			time.Sleep(60 * time.Second)
 		}
 
 		lock.Lock()
-		fmt.Println("Reset aborted")
-		panic(utils.Shell().Run())
-	}()
-
-	if !agentConfig.Fast {
-		time.Sleep(60 * time.Second)
 	}
-	lock.Lock()
 
 	ensureDataSourceReady()
 
@@ -95,6 +96,11 @@ func Reset(dir ...string) error {
 		}
 	}
 
+	// Override with flags
+	if reboot {
+		resetSpec.Reboot = reboot
+	}
+
 	resetAction := action.NewResetAction(c, resetSpec)
 	if err := resetAction.Run(); err != nil {
 		fmt.Println(err)

main.go

@@ -446,9 +446,21 @@ This command is meant to be used from the boot GRUB menu, but can likely be used
 	},
 	{
 		Name: "reset",
+		Flags: []cli.Flag{
+			&cli.BoolFlag{
+				Name:  "reboot",
+				Usage: "Enable automated reboot after reset. Has precedence over any config in the system.",
+			},
+			&cli.BoolFlag{
+				Name:  "unattended",
+				Usage: "Do not wait for user input and provide ttys after reset. Also sets the fast mode (do not wait 60 seconds before reset)",
+			},
+		},
 		Action: func(c *cli.Context) error {
+			reboot := c.Bool("reboot")
+			unattended := c.Bool("unattended")
 
-			return agent.Reset(configScanDir...)
+			return agent.Reset(reboot, unattended, configScanDir...)
 		},
 		Usage: "Starts kairos reset mode",
 		Description: `