Improve tool description, user feedback and add examples

Author: MatteoPologruto

main.go

@@ -19,10 +19,11 @@ import (
 	"context"
 	"fmt"
 	"log/slog"
+	"os"
 
 	"github.com/spf13/cobra"
 	"go.bug.st/cleanup"
-	
+
 	"github.com/arduino/arduino-flasher-cli/feedback"
 	"github.com/arduino/arduino-flasher-cli/i18n"
 )
@@ -34,7 +35,9 @@ var format string
 func main() {
 	rootCmd := &cobra.Command{
 		Use:   "arduino-flasher-cli",
-		Short: "A CLI to update and flash the Debian image",
+		Short: "A CLI to update your Arduino UNO Q board, by downloading and flashing the latest Arduino Linux image",
+		Example: " " + os.Args[0] + " flash latest\n" +
+			" " + os.Args[0] + " list\n",
 		PersistentPreRun: func(cmd *cobra.Command, args []string) {
 			format, ok := feedback.ParseOutputFormat(format)
 			if !ok {

updater/download_image.go

@@ -46,24 +46,27 @@ type Release struct {
 // DownloadConfirmCB is a function that is called when a Debian image is ready to be downloaded.
 type DownloadConfirmCB func(target string) (bool, error)
 
-func DownloadAndExtract(client *Client, targetVersion string, upgradeConfirmCb DownloadConfirmCB, forceYes bool) (*paths.Path, error) {
+func DownloadAndExtract(client *Client, targetVersion string, upgradeConfirmCb DownloadConfirmCB, forceYes bool) (*paths.Path, string, error) {
 	tmpZip, version, err := DownloadImage(client, targetVersion, upgradeConfirmCb, forceYes)
 	if err != nil {
-		return nil, fmt.Errorf("error downloading the image: %v", err)
+		return nil, "", fmt.Errorf("error downloading the image: %v", err)
 	}
 
 	// Download not confirmed
 	if tmpZip == nil {
-		return nil, nil
+		return nil, "", nil
 	}
 
 	err = ExtractImage(tmpZip, tmpZip.Parent())
 	if err != nil {
-		return nil, fmt.Errorf("error extracting the image: %v", err)
+		return nil, "", fmt.Errorf("error extracting the image: %v", err)
 	}
 
 	imagePath := tmpZip.Parent().Join("arduino-unoq-debian-image-" + version)
-	return imagePath, nil
+	if targetVersion == "latest" {
+		version += "(latest)"
+	}
+	return imagePath, version, nil
 }
 
 func DownloadImage(client *Client, targetVersion string, upgradeConfirmCb DownloadConfirmCB, forceYes bool) (*paths.Path, string, error) {

updater/flasher.go

@@ -32,7 +32,7 @@ func Flash(ctx context.Context, imagePath *paths.Path, version string, forceYes
 	if !imagePath.Exist() {
 		client := NewClient()
 
-		tempImagePath, err := DownloadAndExtract(client, version, func(target string) (bool, error) {
+		tempImagePath, v, err := DownloadAndExtract(client, version, func(target string) (bool, error) {
 			feedback.Printf("Found Debian image version: %s", target)
 			feedback.Printf("Do you want to download it? (yes/no)")
 
@@ -56,6 +56,7 @@ func Flash(ctx context.Context, imagePath *paths.Path, version string, forceYes
 
 		defer tempImagePath.Parent().RemoveAll()
 
+		version = v
 		imagePath = tempImagePath
 	} else if !imagePath.IsDir() {
 		temp, err := GetTempDir("extract-")
@@ -77,7 +78,7 @@ func Flash(ctx context.Context, imagePath *paths.Path, version string, forceYes
 		imagePath = tempContent[0]
 	}
 
-	return FlashBoard(ctx, imagePath.String(), func(target string) (bool, error) {
+	return FlashBoard(ctx, imagePath.String(), version, func(target string) (bool, error) {
 		feedback.Print("\nWARNING: flashing a new Linux image on the board will erase any existing data you have on it.")
 		feedback.Printf("Do you want to procede and flash %s on the board? (yes/no)", target)
 
@@ -91,9 +92,9 @@ func Flash(ctx context.Context, imagePath *paths.Path, version string, forceYes
 	}, forceYes)
 }
 
-func FlashBoard(ctx context.Context, downloadedImagePath string, upgradeConfirmCb DownloadConfirmCB, forceYes bool) error {
+func FlashBoard(ctx context.Context, downloadedImagePath string, version string, upgradeConfirmCb DownloadConfirmCB, forceYes bool) error {
 	if !forceYes {
-		res, err := upgradeConfirmCb(downloadedImagePath)
+		res, err := upgradeConfirmCb(version)
 		if err != nil {
 			return err
 		}
@@ -152,5 +153,7 @@ func FlashBoard(ctx context.Context, downloadedImagePath string, upgradeConfirmC
 		return err
 	}
 
+	feedback.Print("\nThe board has been successfully flashed. You can now power-cycle the board (unplug and re-plug). Remember to remove the jumper.")
+
 	return nil
 }