fix: Download bundle without specifying tag

The "latest" tag is not supported, therefore it is necessary to stop
with an error in case it is not provided when using the -b flag command
line flag.

Add unit tests to reproduce the bug and verify the fix.

Closes issue #4470

pkg/crc/machine/bundle/metadata.go

@@ -238,17 +238,20 @@ func GetCustomBundleName(bundleFilename string) string {
 	return fmt.Sprintf("%s_%d%s", baseName, time.Now().Unix(), bundleExtension)
 }
 
-func GetBundleNameFromURI(bundleURI string) string {
+func GetBundleNameFromURI(bundleURI string) (string, error) {
 	// the URI is expected to have been validated by validation.ValidateBundlePath first
 	switch {
 	case strings.HasPrefix(bundleURI, "docker://"):
 		imageAndTag := strings.Split(path.Base(bundleURI), ":")
-		return constants.BundleForPreset(image.GetPresetName(imageAndTag[0]), imageAndTag[1])
+		if len(imageAndTag) < 2 {
+			return "", fmt.Errorf("No tag found in bundle URI")
+		}
+		return constants.BundleForPreset(image.GetPresetName(imageAndTag[0]), imageAndTag[1]), nil
 	case strings.HasPrefix(bundleURI, "http://"), strings.HasPrefix(bundleURI, "https://"):
-		return path.Base(bundleURI)
+		return path.Base(bundleURI), nil
 	default:
 		// local path
-		return filepath.Base(bundleURI)
+		return filepath.Base(bundleURI), nil
 	}
 }
 

pkg/crc/machine/bundle/metadata_test.go

@@ -55,7 +55,7 @@ func jsonForBundleWithVersion(version, name string) string {
       {
         "name": "crc.qcow2",
         "format": "qcow2",
-	"size": "9",
+        "size": "9",
         "sha256sum": "245a0e5acd4f09000a9a5f37d731082ed1cf3fdcad1b5320cbe9b153c9fd82a4"
       }
     ],
@@ -289,3 +289,27 @@ func TestGetBundleInfoFromNameInvalid(t *testing.T) {
 	_, err = GetBundleInfoFromName("crc_nanoshift_libvirt_4.16.7_amd64_232.crcbundle")
 	assert.Error(t, err)
 }
+
+func TestGetBundleNameFromURI(t *testing.T) {
+	// URI with no tag
+	bundleName, err := GetBundleNameFromURI("docker://quay.io/crcont/openshift-bundle")
+	assert.Equal(t, "", bundleName)
+	assert.Error(t, err)
+
+	expectedBundleName := "crc_libvirt_4.17.3_amd64.crcbundle"
+
+	// URI with tag
+	bundleName, err = GetBundleNameFromURI("docker://quay.io/crcont/openshift-bundle:4.17.3")
+	assert.Nil(t, err)
+	assert.Equal(t, expectedBundleName, bundleName)
+
+	// HTTPs
+	bundleName, err = GetBundleNameFromURI("https://developers.redhat.com/content-gateway/file/pub/openshift-v4/clients/crc/bundles/openshift/4.17.3/crc_libvirt_4.17.3_amd64.crcbundle")
+	assert.Nil(t, err)
+	assert.Equal(t, bundleName, expectedBundleName, bundleName)
+
+	// Local file
+	bundleName, err = GetBundleNameFromURI("/home/user/Downloads/crc_libvirt_4.17.3_amd64.crcbundle")
+	assert.Nil(t, err)
+	assert.Equal(t, bundleName, expectedBundleName, bundleName)
+}

pkg/crc/machine/start.go

@@ -278,7 +278,11 @@ func (client *client) Start(ctx context.Context, startConfig types.StartConfig)
 		return nil, errors.Wrap(err, "Cannot determine if VM exists")
 	}
 
-	bundleName := bundle.GetBundleNameWithoutExtension(bundle.GetBundleNameFromURI(startConfig.BundlePath))
+	bundleNameFromURI, err := bundle.GetBundleNameFromURI(startConfig.BundlePath)
+	if err != nil {
+		return nil, errors.Wrap(err, "Error getting bundle name")
+	}
+	bundleName := bundle.GetBundleNameWithoutExtension(bundleNameFromURI)
 	crcBundleMetadata, err := getCrcBundleInfo(startConfig.Preset, bundleName, startConfig.BundlePath, startConfig.EnableBundleQuayFallback)
 	if err != nil {
 		return nil, errors.Wrap(err, "Error getting bundle metadata")

pkg/crc/preflight/preflight_checks_common.go

@@ -86,7 +86,11 @@ var genericCleanupChecks = []Check{
 func checkBundleExtracted(bundlePath string) func() error {
 	return func() error {
 		logging.Infof("Checking if %s exists", bundlePath)
-		bundleName := bundle.GetBundleNameFromURI(bundlePath)
+		bundleName, err := bundle.GetBundleNameFromURI(bundlePath)
+		if err != nil {
+			logging.Debugf("error getting bundle name from path %s: %v", bundlePath, err)
+			return err
+		}
 		if _, err := bundle.Get(bundleName); err != nil {
 			logging.Debugf("error getting bundle info for %s: %v", bundleName, err)
 			return err

pkg/crc/validation/validation.go

@@ -83,13 +83,19 @@ func ValidateBundlePath(bundlePath string, preset crcpreset.Preset) error {
 		}
 	}
 
-	userProvidedBundle := bundle.GetBundleNameFromURI(bundlePath)
+	userProvidedBundle, err := bundle.GetBundleNameFromURI(bundlePath)
+	if err != nil {
+		return err
+	}
 	bundleMismatchWarning(userProvidedBundle, preset)
 	return nil
 }
 
 func ValidateBundle(bundlePath string, preset crcpreset.Preset) error {
-	bundleName := bundle.GetBundleNameFromURI(bundlePath)
+	bundleName, err := bundle.GetBundleNameFromURI(bundlePath)
+	if err != nil {
+		return err
+	}
 	bundleMetadata, err := bundle.Get(bundleName)
 	if err != nil {
 		if bundlePath == constants.GetDefaultBundlePath(preset) {