seedling: Webui enhancements (#620)

* 🌱 Make sure webui starts on alpine

Also drop to shell when there are no providers

Signed-off-by: mudler <mudler@c3os.io>

* 🌱 Suppress verbose logging on tty

Signed-off-by: mudler <mudler@c3os.io>

* 🌱 Print WebUI address

Signed-off-by: mudler <mudler@c3os.io>

* 🎨 Update banner

Signed-off-by: mudler <mudler@c3os.io>

* 🌱 Refactor, display also interfaces

Signed-off-by: mudler <mudler@c3os.io>

* 🌱 Address feedback from review

Signed-off-by: mudler <mudler@c3os.io>

Signed-off-by: mudler <mudler@c3os.io>

internal/agent/config.go

@@ -18,6 +18,11 @@ type WebUI struct {
 	Disable       bool   `yaml:"disable"`
 	ListenAddress string `yaml:"listen_address"`
 }
+
+func (w WebUI) HasAddress() bool {
+	return w.ListenAddress != ""
+}
+
 type Config struct {
 	Fast     bool         `yaml:"fast,omitempty"`
 	WebUI    WebUI        `yaml:"webui"`

internal/agent/install.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"os"
 	"os/exec"
+	"strings"
 	"syscall"
 	"time"
 
@@ -38,6 +39,28 @@ func optsToArgs(options map[string]string) (res []string) {
 	return
 }
 
+func displayInfo(agentConfig *Config) {
+	fmt.Println("--------------------------")
+	fmt.Println("No providers found, dropping to a shell. \n -- For instructions on how to install manually, see: https://kairos.io/docs/installation/manual/")
+	if !agentConfig.WebUI.Disable {
+		if !agentConfig.WebUI.HasAddress() {
+			ips := machine.LocalIPs()
+			if len(ips) > 0 {
+				fmt.Print("WebUI installer running at : ")
+				for _, ip := range ips {
+					fmt.Printf("%s%s ", ip, config.DefaultWebUIListenAddress)
+				}
+				fmt.Print("\n")
+			}
+		} else {
+			fmt.Printf("WebUI installer running at : %s\n", agentConfig.WebUI.ListenAddress)
+		}
+
+		ifaces := machine.Interfaces()
+		fmt.Printf("Network Interfaces: %s\n", strings.Join(ifaces, " "))
+	}
+}
+
 func ManualInstall(config string, options map[string]string) error {
 	dat, err := os.ReadFile(config)
 	if err != nil {
@@ -88,7 +111,7 @@ func Install(dir ...string) error {
 
 	// Reads config, and if present and offline is defined,
 	// runs the installation
-	cc, err := config.Scan(config.Directories(dir...), config.MergeBootLine)
+	cc, err := config.Scan(config.Directories(dir...), config.MergeBootLine, config.NoLogs)
 	if err == nil && cc.Install != nil && cc.Install.Auto {
 		r["cc"] = cc.String()
 		r["device"] = cc.Install.Device
@@ -110,14 +133,23 @@ func Install(dir ...string) error {
 		fmt.Printf("- config not found in the system: %s", err.Error())
 	}
 
-	_, err = bus.Manager.Publish(events.EventChallenge, events.EventPayload{Config: cc.String()})
+	agentConfig, err := LoadConfig()
 	if err != nil {
 		return err
 	}
 
+	// try to clear screen
+	cmd.ClearScreen()
 	cmd.PrintBranding(DefaultBanner)
 
-	agentConfig, err := LoadConfig()
+	// If there are no providers registered, we enter a shell for manual installation and print information about
+	// the webUI
+	if !bus.Manager.HasRegisteredPlugins() {
+		displayInfo(agentConfig)
+		return utils.Shell().Run()
+	}
+
+	_, err = bus.Manager.Publish(events.EventChallenge, events.EventPayload{Config: cc.String()})
 	if err != nil {
 		return err
 	}

internal/bus/bus.go

@@ -35,6 +35,10 @@ func (b *Bus) LoadProviders() {
 	b.Manager.Autoload("agent-provider", "/system/providers", "/usr/local/system/providers", wd).Register()
 }
 
+func (b *Bus) HasRegisteredPlugins() bool {
+	return len(b.Plugins) > 0
+}
+
 func (b *Bus) Initialize() {
 	if b.registered {
 		return

internal/cmd/utils.go

@@ -15,14 +15,18 @@ func PrintText(f string, banner string) {
 		f)
 }
 
+func ClearScreen() {
+	fmt.Print("\033c")
+}
+
 func PrintBranding(b []byte) {
 	brandingFile := kairos.BrandingFile("banner")
 	if _, err := os.Stat(brandingFile); err == nil {
 		f, err := os.ReadFile(brandingFile)
 		if err == nil {
 			fmt.Println(string(f))
+			return
 		}
-
 	}
 	utils.PrintBanner(b)
 }

internal/webui/webui.go

@@ -14,6 +14,7 @@ import (
 	"time"
 
 	"github.com/kairos-io/kairos/internal/agent"
+	"github.com/kairos-io/kairos/pkg/config"
 	"github.com/labstack/echo/v4"
 	process "github.com/mudler/go-processmanager"
 	"github.com/nxadm/tail"
@@ -134,7 +135,7 @@ func (t *TemplateRenderer) Render(w io.Writer, name string, data interface{}, c
 func Start(ctx context.Context) error {
 
 	s := state{}
-	listen := ":8080"
+	listen := config.DefaultWebUIListenAddress
 
 	ec := echo.New()
 	assetHandler := http.FileServer(getFileSystem())