add an exclude command for images that should not be added as compone…

…nt reference

```feature user
Added an exclude flag to the image-vector generation command for images that should not be added as component reference

```

docs/reference/components-cli_image-vector_add.md

@@ -140,12 +140,13 @@ components-cli image-vector add --comp-desc component-descriptor-file --image-ve
 ### Options
 
 ```
-      --comp-desc string                 path to the component descriptor directory
-      --component-prefixes stringArray   Specify all prefixes that define a image  from another component
-      --generic-dependencies string      Specify all prefixes that define a image  from another component
-      --generic-dependency stringArray   Specify all image source names that are a generic dependency.
-  -h, --help                             help for add
-      --image-vector string              The path to the resources defined as yaml or json
+      --comp-desc string                          path to the component descriptor directory
+      --component-prefixes stringArray            Specify all prefixes that define a image  from another component
+      --exclude-component-reference stringArray   Specify all image name that should not be added as component reference
+      --generic-dependencies string               Specify all prefixes that define a image  from another component
+      --generic-dependency stringArray            Specify all image source names that are a generic dependency.
+  -h, --help                                      help for add
+      --image-vector string                       The path to the resources defined as yaml or json
 ```
 
 ### Options inherited from parent commands

pkg/commands/imagevector/add.go

@@ -255,6 +255,7 @@ func (o *AddOptions) AddFlags(set *pflag.FlagSet) {
 	set.StringVar(&o.ComponentDescriptorPath, "comp-desc", "", "path to the component descriptor directory")
 	set.StringVar(&o.ImageVectorPath, "image-vector", "", "The path to the resources defined as yaml or json")
 	set.StringArrayVar(&o.ParseImageOptions.ComponentReferencePrefixes, "component-prefixes", []string{}, "Specify all prefixes that define a image  from another component")
+	set.StringArrayVar(&o.ParseImageOptions.ExcludeComponentReference, "exclude-component-reference", []string{}, "Specify all image name that should not be added as component reference")
 	set.StringArrayVar(&o.ParseImageOptions.GenericDependencies, "generic-dependency", []string{}, "Specify all image source names that are a generic dependency.")
 	set.StringVar(&o.GenericDependencies, "generic-dependencies", "", "Specify all prefixes that define a image  from another component")
 }

pkg/commands/imagevector/add_test.go

@@ -301,6 +301,37 @@ var _ = Describe("Add", func() {
 		})))
 	})
 
+	It("should not add a image sources that match a given pattern as component reference but is excluded", func() {
+
+		opts := &ivcmd.AddOptions{
+			ComponentDescriptorPath: "./00-component/component-descriptor.yaml",
+			ImageVectorPath:         "./resources/20-comp-ref.yaml",
+			ParseImageOptions: imagevector.ParseImageOptions{
+				ComponentReferencePrefixes: []string{"eu.gcr.io/gardener-project/gardener"},
+				ExcludeComponentReference:  []string{"cluster-autoscaler"},
+			},
+		}
+
+		Expect(opts.Run(context.TODO(), testlog.NullLogger{}, testdataFs)).To(Succeed())
+
+		data, err := vfs.ReadFile(testdataFs, opts.ComponentDescriptorPath)
+		Expect(err).ToNot(HaveOccurred())
+
+		cd := &cdv2.ComponentDescriptor{}
+		Expect(codec.Decode(data, cd)).To(Succeed())
+
+		Expect(cd.ComponentReferences).To(HaveLen(0))
+		Expect(cd.Resources).To(HaveLen(1))
+		Expect(cd.Resources[0]).To(MatchFields(IgnoreExtras, Fields{
+			"Relation": Equal(cdv2.ExternalRelation),
+		}))
+		Expect(cd.Resources[0].IdentityObjectMeta).To(MatchFields(IgnoreExtras, Fields{
+			"Name":          Equal("cluster-autoscaler"),
+			"Version":       Equal("v0.10.0"),
+			"ExtraIdentity": HaveKeyWithValue(imagevector.TagExtraIdentity, "v0.10.0"),
+		}))
+	})
+
 	It("should add two image sources that match a given pattern as component reference", func() {
 
 		opts := &ivcmd.AddOptions{

pkg/imagevector/imagevector.go

@@ -20,6 +20,9 @@ type ParseImageOptions struct {
 	// These images are then not added as direct resources but the source repository is used as the component reference.
 	ComponentReferencePrefixes []string
 
+	// ExcludeComponentReference defines a list of image names that should be added as component reference
+	ExcludeComponentReference []string
+
 	// GenericDependencies define images that should be untouched and not added as real dependency to the component descriptors.
 	// These dependencies are added a specific label to the component descriptor.
 	GenericDependencies []string
@@ -48,7 +51,7 @@ func ParseImageVector(cd *cdv2.ComponentDescriptor, reader io.Reader, opts *Pars
 			continue
 		}
 
-		if entryMatchesPrefix(opts.ComponentReferencePrefixes, image.Repository) {
+		if entryMatchesPrefix(opts.ComponentReferencePrefixes, image.Repository) && !isOneOf(opts.ExcludeComponentReference, image.Name) {
 			// add image as component reference
 			ref := cdv2.ComponentReference{
 				Name:          image.Name,
@@ -283,3 +286,12 @@ func entryMatchesPrefix(prefixes []string, val string) bool {
 	}
 	return false
 }
+
+func isOneOf(keys []string, key string) bool {
+	for _, k := range keys {
+		if k == key {
+			return true
+		}
+	}
+	return false
+}