Add a spinner 😵‍💫

cmd/src/sbom_fetch.go

@@ -95,17 +95,23 @@ Examples:
 			return err
 		}
 
-		fmt.Printf("Fetching SBOMs and validating signatures for all %d images in the Sourcegraph %s deployment...\n", len(images), c.version)
+		fmt.Printf("Fetching SBOMs and validating signatures for all %d images in the Sourcegraph %s release...\n", len(images), c.version)
 
 		var successCount, failureCount int
 		for _, image := range images {
+			stopSpinner := make(chan bool)
+			go spinner(image, stopSpinner)
+
 			_, err = c.getSBOMForImageVersion(image, c.version)
+
+			stopSpinner <- true
+
 			if err != nil {
 				out.WriteLine(output.Line(output.EmojiFailure, output.StyleWarning,
-					fmt.Sprintf("%s: error fetching and validating SBOM:\n    %v", image, err)))
+					fmt.Sprintf("\r%s: error fetching and validating SBOM:\n    %v", image, err)))
 				failureCount += 1
 			} else {
-				out.WriteLine(output.Line("\u2705", output.StyleSuccess, image))
+				out.WriteLine(output.Line("\r\u2705", output.StyleSuccess, image))
 				successCount += 1
 			}
 		}

cmd/src/sbom_utils.go

@@ -7,6 +7,7 @@ import (
 	"net/http"
 	"os/exec"
 	"strings"
+	"time"
 )
 
 // Manifest represents a simplified structure of the Docker manifest response
@@ -191,3 +192,19 @@ func getGcloudAccessToken() (string, error) {
 	token := strings.TrimSpace(string(out))
 	return token, nil
 }
+
+var spinnerChars = []rune{'⠋', '⠙', '⠹', '⠸', '⠼', '⠴', '⠦', '⠧', '⠇', '⠏'}
+
+func spinner(name string, stop chan bool) {
+	i := 0
+	for {
+		select {
+		case <-stop:
+			return
+		default:
+			fmt.Printf("\r%s  %s", string(spinnerChars[i%len(spinnerChars)]), name)
+			i++
+			time.Sleep(100 * time.Millisecond)
+		}
+	}
+}