feat: ⬆️ add self update command

commands/update-self.go

@@ -0,0 +1,54 @@
+package commands
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"os/exec"
+	"ui/cli/module"
+
+	"github.com/gookit/color"
+	"github.com/urfave/cli/v2"
+)
+
+func UpdateSelf(c *cli.Context) {
+	var cmd = exec.Command("sudo", "-v")
+	cmd.Stdout = nil
+	err := cmd.Run()
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	color.Yellowln("Updating ui-cli")
+	fmt.Println()
+
+	filePath := module.DownloadFileToCache("https://github.com/Update-Install/CLI/releases/latest/download/ui-cli_linux_amd64")
+
+	module.FullWidthMessage("installation log start", color.Gray)
+	cmd = exec.Command("sudo", "mv", filePath, "/usr/local/bin/ui")
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	err = cmd.Run()
+	if err != nil {
+		log.Fatal(err)
+	}
+	fmt.Println("Moved", filePath, "to /usr/local/bin")
+	cmd = exec.Command("sudo", "chmod", "+x", "/usr/local/bin/ui")
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	err = cmd.Run()
+	if err != nil {
+		log.Fatal(err)
+	}
+	fmt.Println("Changed permission for /usr/local/bin/ui")
+	module.FullWidthMessage("installation log end", color.Gray)
+
+	color.Greenf("Successfully updated ui-cli to ")
+	cmd = exec.Command("/usr/local/bin/ui", "version")
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	err = cmd.Run()
+	if err != nil {
+		log.Fatal(err)
+	}
+}

main.go

@@ -70,6 +70,15 @@ func main() {
 					return nil
 				},
 			},
+			{
+				Name:    "update-self",
+				Aliases: []string{"us"},
+				Usage:   "update ui-cli to the latest version",
+				Action: func(ctx *cli.Context) error {
+					commands.UpdateSelf(ctx)
+					return nil
+				},
+			},
 		},
 	}