Allow the user to provide a list of specific kube markers to be ignored

README.md

@@ -76,3 +76,6 @@ Other supported options are:
     *   when set to `true`, the native openapi schemas will be used for Integer types instead of Solo wrappers that add Kubernetes extension headers to the schema to treat int as strings.
 *  `disable_kube_markers`
     *   when set to `true`, kubebuilder markers and validations such as PreserveUnknownFields, MinItems, default, and all CEL rules will be omitted from the OpenAPI schema. The Type and Required markers will be maintained.
+*  `ignored_kube_marker_substrings`
+    *   when set, this list of substrings will be used to identify kubebuilder markers to ignore. When multiple are 
+        supplied, this will function as a logical OR i.e. any rule which contains a provided substring will be ignored

changelog/v0.2.5/allow_ignored_kube_markers.yaml

@@ -0,0 +1,7 @@
+changelog:
+  - type: NEW_FEATURE
+    issueLink: https://github.com/solo-io/gloo-mesh-enterprise/issues/18119
+    resolvesIssue: false
+    description: |
+      Allows the user to define one or more kube markers to ignore. This is useful when using protos that contain
+      unsupported kubebuilder decorators.

integration_test.go

@@ -109,6 +109,36 @@ func TestOpenAPIGeneration(t *testing.T) {
 			},
 			wantFiles: []string{"test7/openapiv3.yaml"},
 		},
+		{
+			name:       "Test no markers are ignored when ignored_kube_markers is zero length",
+			id:         "test8",
+			perPackage: false,
+			genOpts:    "yaml=true,single_file=true,proto_oneof=true,int_native=true,multiline_description=true,disable_kube_markers=false,ignored_kube_marker_substrings=",
+			inputFiles: map[string][]string{
+				"test8": {"./testdata/test8/markers.proto"},
+			},
+			wantFiles: []string{"test8/openapiv3.yaml"},
+		},
+		{
+			name:       "Test ignored_kube_markers option ignores a single marker",
+			id:         "test9",
+			perPackage: false,
+			genOpts:    "yaml=true,single_file=true,proto_oneof=true,int_native=true,multiline_description=true,disable_kube_markers=false,ignored_kube_marker_substrings=Required",
+			inputFiles: map[string][]string{
+				"test9": {"./testdata/test9/markers.proto"},
+			},
+			wantFiles: []string{"test9/openapiv3.yaml"},
+		},
+		{
+			name:       "Test ignored_kube_markers option ignores multiple markers",
+			id:         "test10",
+			perPackage: false,
+			genOpts:    "yaml=true,single_file=true,proto_oneof=true,int_native=true,multiline_description=true,disable_kube_markers=false,ignored_kube_marker_substrings=Required+example",
+			inputFiles: map[string][]string{
+				"test10": {"./testdata/test10/markers.proto"},
+			},
+			wantFiles: []string{"test10/openapiv3.yaml"},
+		},
 	}
 
 	for _, tc := range testcases {

main.go

@@ -56,6 +56,7 @@ func generate(request pluginpb.CodeGeneratorRequest) (*pluginpb.CodeGeneratorRes
 	disableKubeMarkers := false
 
 	var messagesWithEmptySchema []string
+	var ignoredKubeMarkerSubstrings []string
 
 	p := extractParams(request.GetParameter())
 	for k, v := range p {
@@ -147,6 +148,10 @@ func generate(request pluginpb.CodeGeneratorRequest) (*pluginpb.CodeGeneratorRes
 			default:
 				return nil, fmt.Errorf("unknown value '%s' for disable_kube_markers", v)
 			}
+		} else if k == "ignored_kube_marker_substrings" {
+			if len(v) > 0 {
+				ignoredKubeMarkerSubstrings = strings.Split(v, "+")
+			}
 		} else {
 			return nil, fmt.Errorf("unknown argument '%s' specified", k)
 		}
@@ -184,6 +189,7 @@ func generate(request pluginpb.CodeGeneratorRequest) (*pluginpb.CodeGeneratorRes
 		protoOneof,
 		intNative,
 		disableKubeMarkers,
+		ignoredKubeMarkerSubstrings,
 	)
 	return g.generateOutput(filesToGen)
 }

openapiGenerator.go

@@ -33,6 +33,7 @@ import (
 
 	"github.com/solo-io/protoc-gen-openapi/pkg/markers"
 	"github.com/solo-io/protoc-gen-openapi/pkg/protomodel"
+	"regexp"
 )
 
 var descriptionExclusionMarkers = []string{"$hide_from_docs", "$hide", "@exclude"}
@@ -121,6 +122,10 @@ type openapiGenerator struct {
 	// If set to true, kubebuilder markers and validations such as PreserveUnknownFields, MinItems, default, and all CEL rules will be omitted from the OpenAPI schema.
 	// The Type and Required markers will be maintained.
 	disableKubeMarkers bool
+
+	// when set, this list of substrings will be used to identify kubebuilder markers to ignore. When multiple are
+	// supplied, this will function as a logical OR i.e. any rule which contains a provided substring will be ignored
+	ignoredKubeMarkerSubstrings []string
 }
 
 type DescriptionConfiguration struct {
@@ -143,25 +148,26 @@ func newOpenAPIGenerator(
 	protoOneof bool,
 	intNative bool,
 	disableKubeMarkers bool,
+	ignoredKubeMarkers []string,
 ) *openapiGenerator {
 	mRegistry, err := markers.NewRegistry()
 	if err != nil {
 		log.Panicf("error initializing marker registry: %v", err)
 	}
-
 	return &openapiGenerator{
-		model:                      model,
-		perFile:                    perFile,
-		singleFile:                 singleFile,
-		yaml:                       yaml,
-		useRef:                     useRef,
-		descriptionConfiguration:   descriptionConfiguration,
-		enumAsIntOrString:          enumAsIntOrString,
-		customSchemasByMessageName: buildCustomSchemasByMessageName(messagesWithEmptySchema),
-		protoOneof:                 protoOneof,
-		intNative:                  intNative,
-		markerRegistry:             mRegistry,
-		disableKubeMarkers:         disableKubeMarkers,
+		model:                       model,
+		perFile:                     perFile,
+		singleFile:                  singleFile,
+		yaml:                        yaml,
+		useRef:                      useRef,
+		descriptionConfiguration:    descriptionConfiguration,
+		enumAsIntOrString:           enumAsIntOrString,
+		customSchemasByMessageName:  buildCustomSchemasByMessageName(messagesWithEmptySchema),
+		protoOneof:                  protoOneof,
+		intNative:                   intNative,
+		markerRegistry:              mRegistry,
+		disableKubeMarkers:          disableKubeMarkers,
+		ignoredKubeMarkerSubstrings: ignoredKubeMarkers,
 	}
 }
 
@@ -663,6 +669,13 @@ func (g *openapiGenerator) parseComments(desc protomodel.CoreDesc) (comments str
 	c := strings.TrimSpace(desc.Location().GetLeadingComments())
 	blocks := strings.Split(c, "\n\n")
 
+	var ignoredKubeMarkersRegexp *regexp.Regexp
+	if len(g.ignoredKubeMarkerSubstrings) > 0 {
+		ignoredKubeMarkersRegexp = regexp.MustCompile(
+			fmt.Sprintf("(?:%s)", strings.Join(g.ignoredKubeMarkerSubstrings, "|")),
+		)
+	}
+
 	var sb strings.Builder
 	for i, block := range blocks {
 		if shouldNotRenderDesc(strings.TrimSpace(block)) {
@@ -681,7 +694,12 @@ func (g *openapiGenerator) parseComments(desc protomodel.CoreDesc) (comments str
 			if shouldNotRenderDesc(l) {
 				continue
 			}
+
 			if strings.HasPrefix(l, markers.Kubebuilder) {
+				if isIgnoredKubeMarker(ignoredKubeMarkersRegexp, l) {
+					continue
+				}
+
 				validationRules = append(validationRules, l)
 				continue
 			}
@@ -813,3 +831,11 @@ func (g *openapiGenerator) relativeName(desc protomodel.CoreDesc) string {
 
 	return desc.PackageDesc().Name + "." + typeName
 }
+
+func isIgnoredKubeMarker(regexp *regexp.Regexp, l string) bool {
+	if regexp == nil {
+		return false
+	}
+
+	return regexp.MatchString(l)
+}

testdata/golden/test10/openapiv3.yaml

@@ -0,0 +1,73 @@
+components:
+  schemas:
+    test10.Msg:
+      description: This is a top-level message.
+      properties:
+        a:
+          exclusiveMaximum: true
+          exclusiveMinimum: true
+          format: int32
+          maximum: 100
+          minimum: 5
+          multipleOf: 2
+          type: integer
+          x-kubernetes-validations:
+          - message: must not equal 27
+            rule: self != 27
+        blist:
+          items:
+            type: string
+          maxItems: 5
+          minItems: 1
+          type: array
+          uniqueItems: true
+        nested:
+          maxProperties: 2
+          minProperties: 1
+          properties:
+            a:
+              pattern: ^[a-zA-Z0-9_]*$
+              type: string
+            b:
+              enum:
+              - Allow
+              - Forbid
+              - Replace
+              type: string
+            c:
+              maxLength: 100
+              minLength: 1
+              type: string
+            d:
+              format: date-time
+              type: string
+            defaultValue:
+              default: forty-two
+              type: string
+            embedded:
+              nullable: true
+              type: string
+              x-kubernetes-embedded-resource: true
+            intOrString:
+              type: string
+              x-kubernetes-int-or-string: true
+            schemaless:
+              description: Schemaless field
+          type: object
+          x-kubernetes-preserve-unknown-fields: true
+        object:
+          description: Should maintain valid Type marker and not enumerate subfields.
+          type: object
+          x-kubernetes-preserve-unknown-fields: true
+        recursive:
+          type: object
+          x-kubernetes-preserve-unknown-fields: true
+        val:
+          x-kubernetes-preserve-unknown-fields: true
+      type: object
+      x-kubernetes-preserve-unknown-fields: true
+info:
+  title: OpenAPI Spec for Solo APIs.
+  version: ""
+openapi: 3.0.1
+paths: null

testdata/golden/test8/openapiv3.yaml

@@ -0,0 +1,77 @@
+components:
+  schemas:
+    test8.Msg:
+      description: This is a top-level message.
+      properties:
+        a:
+          exclusiveMaximum: true
+          exclusiveMinimum: true
+          format: int32
+          maximum: 100
+          minimum: 5
+          multipleOf: 2
+          type: integer
+          x-kubernetes-validations:
+          - message: must not equal 27
+            rule: self != 27
+        blist:
+          items:
+            type: string
+          maxItems: 5
+          minItems: 1
+          type: array
+          uniqueItems: true
+        nested:
+          maxProperties: 2
+          minProperties: 1
+          properties:
+            a:
+              pattern: ^[a-zA-Z0-9_]*$
+              type: string
+            b:
+              enum:
+              - Allow
+              - Forbid
+              - Replace
+              type: string
+            c:
+              maxLength: 100
+              minLength: 1
+              type: string
+            d:
+              format: date-time
+              type: string
+            defaultValue:
+              default: forty-two
+              example: forty-two
+              type: string
+            embedded:
+              nullable: true
+              type: string
+              x-kubernetes-embedded-resource: true
+            intOrString:
+              type: string
+              x-kubernetes-int-or-string: true
+            schemaless:
+              description: Schemaless field
+          required:
+          - a
+          - b
+          type: object
+          x-kubernetes-preserve-unknown-fields: true
+        object:
+          description: Should maintain valid Type marker and not enumerate subfields.
+          type: object
+          x-kubernetes-preserve-unknown-fields: true
+        recursive:
+          type: object
+          x-kubernetes-preserve-unknown-fields: true
+        val:
+          x-kubernetes-preserve-unknown-fields: true
+      type: object
+      x-kubernetes-preserve-unknown-fields: true
+info:
+  title: OpenAPI Spec for Solo APIs.
+  version: ""
+openapi: 3.0.1
+paths: null