Add schema-path flag to input openAPI for setters

cmd/config/internal/commands/cmdcreatesetter.go

@@ -48,6 +48,9 @@ func NewCreateSetterRunner(parent string) *CreateSetterRunner {
 	set.Flags().MarkHidden("partial")
 	set.Flags().StringVar(&setterVersion, "version", "",
 		"use this version of the setter format")
+	set.Flags().StringVar(&r.CreateSetter.SchemaPath, "schema-path", "",
+		`openAPI schema file path for setter constraints -- file content `+
+			`e.g. {"type": "string", "maxLength": 15, "enum": ["allowedValue1", "allowedValue2"]}`)
 	set.Flags().MarkHidden("version")
 	fixDocs(parent, set)
 	r.Command = set

cmd/config/internal/commands/cmdcreatesetter_test.go

@@ -21,6 +21,7 @@ func TestCreateSetterCommand(t *testing.T) {
 		name              string
 		input             string
 		args              []string
+		schema            string
 		out               string
 		inputOpenAPI      string
 		expectedOpenAPI   string
@@ -85,6 +86,88 @@ openAPI:
  `,
 			err: "substitution with name my-image already exists, substitution and setter can't have same name",
 		},
+
+		{
+			name:   "add replicas with schema",
+			args:   []string{"replicas", "3", "--description", "hello world", "--set-by", "me"},
+			schema: `{"maximum": 10, "type": "integer"}`,
+			input: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: nginx-deployment
+spec:
+  replicas: 3
+ `,
+			inputOpenAPI: `
+apiVersion: v1alpha1
+kind: Example
+`,
+			expectedOpenAPI: `
+apiVersion: v1alpha1
+kind: Example
+openAPI:
+  definitions:
+    io.k8s.cli.setters.replicas:
+      maximum: 10
+      type: integer
+      description: hello world
+      x-k8s-cli:
+        setter:
+          name: replicas
+          value: "3"
+          setBy: me
+ `,
+			expectedResources: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: nginx-deployment
+spec:
+  replicas: 3 # {"$ref":"#/definitions/io.k8s.cli.setters.replicas"}
+ `,
+		},
+
+		{
+			name:   "add replicas with schema list values",
+			args:   []string{"list", "a", "--description", "hello world", "--set-by", "me", "--type", "array"},
+			schema: `{"maxItems": 2, "type": "array", "items": {"type": "string"}}`,
+			input: `
+apiVersion: example.com/v1beta1
+kind: Example
+spec:
+  list:
+  - "a"
+ `,
+			inputOpenAPI: `
+apiVersion: v1alpha1
+kind: Example
+`,
+			expectedOpenAPI: `
+apiVersion: v1alpha1
+kind: Example
+openAPI:
+  definitions:
+    io.k8s.cli.setters.list:
+      items:
+        type: string
+      maxItems: 2
+      type: array
+      description: hello world
+      x-k8s-cli:
+        setter:
+          name: list
+          value: a
+          setBy: me
+ `,
+			expectedResources: `
+apiVersion: example.com/v1beta1
+kind: Example
+spec:
+  list:
+  - "a" # {"$ref":"#/definitions/io.k8s.cli.setters.list"}
+ `,
+		},
 	}
 	for i := range tests {
 		test := tests[i]
@@ -98,10 +181,27 @@ openAPI:
 				t.FailNow()
 			}
 			defer os.Remove(f.Name())
+
 			err = ioutil.WriteFile(f.Name(), []byte(test.inputOpenAPI), 0600)
 			if !assert.NoError(t, err) {
 				t.FailNow()
 			}
+
+			if test.schema != "" {
+				sch, err := ioutil.TempFile("", "schema.json")
+				if !assert.NoError(t, err) {
+					t.FailNow()
+				}
+				defer os.Remove(sch.Name())
+
+				err = ioutil.WriteFile(sch.Name(), []byte(test.schema), 0600)
+				if !assert.NoError(t, err) {
+					t.FailNow()
+				}
+
+				test.args = append(test.args, "--schema-path", sch.Name())
+			}
+
 			old := ext.GetOpenAPIFile
 			defer func() { ext.GetOpenAPIFile = old }()
 			ext.GetOpenAPIFile = func(args []string) (s string, err error) {

kyaml/setters2/add.go

@@ -4,6 +4,7 @@
 package setters2
 
 import (
+	"encoding/json"
 	"strings"
 
 	"github.com/go-openapi/spec"
@@ -116,6 +117,9 @@ type SetterDefinition struct {
 	// Type is the type of the setter value.
 	Type string `yaml:"type,omitempty"`
 
+	// Schema is the openAPI schema for setter constraints.
+	Schema string `yaml:"schema,omitempty"`
+
 	// EnumValues is a map of possible setter values to actual field values.
 	// If EnumValues is specified, then the value set the by user 1) MUST
 	// be present in the enumValues map as a key, and 2) the map entry value
@@ -137,6 +141,26 @@ func (sd SetterDefinition) Filter(object *yaml.RNode) (*yaml.RNode, error) {
 	if err != nil {
 		return nil, err
 	}
+
+	definitions, err := object.Pipe(yaml.Lookup(openapi.SupplementaryOpenAPIFieldName, "definitions"))
+	if err != nil {
+		return nil, err
+	}
+
+	if sd.Schema != "" {
+		schNode, err := ConvertJSONToYamlNode(sd.Schema)
+		if err != nil {
+			return nil, err
+		}
+
+		err = definitions.PipeE(yaml.SetField(key, schNode))
+		if err != nil {
+			return nil, err
+		}
+		// don't write the schema to the extension
+		sd.Schema = ""
+	}
+
 	if sd.Description != "" {
 		err = def.PipeE(yaml.FieldSetter{Name: "description", StringValue: sd.Description})
 		if err != nil {
@@ -176,6 +200,24 @@ func (sd SetterDefinition) Filter(object *yaml.RNode) (*yaml.RNode, error) {
 	return object, nil
 }
 
+// ConvertJSONToYamlNode parses input json string and returns equivalent yaml node
+func ConvertJSONToYamlNode(jsonStr string) (*yaml.RNode, error) {
+	var body map[string]interface{}
+	err := json.Unmarshal([]byte(jsonStr), &body)
+	if err != nil {
+		return nil, err
+	}
+	yml, err := yaml.Marshal(body)
+	if err != nil {
+		return nil, err
+	}
+	ymlStr, err := yaml.Parse(string(yml))
+	if err != nil {
+		return nil, err
+	}
+	return ymlStr, nil
+}
+
 // SetterDefinition may be used to update a files OpenAPI definitions with a new substitution.
 type SubstitutionDefinition struct {
 	// Name is the name of the substitution to create or update

kyaml/setters2/settersutil/settercreator.go

@@ -4,6 +4,8 @@
 package settersutil
 
 import (
+	"io/ioutil"
+
 	"sigs.k8s.io/kustomize/kyaml/kio"
 	"sigs.k8s.io/kustomize/kyaml/openapi"
 	"sigs.k8s.io/kustomize/kyaml/setters2"
@@ -21,6 +23,8 @@ type SetterCreator struct {
 
 	Type string
 
+	SchemaPath string
+
 	// FieldName if set will add the OpenAPI reference to fields with this name or path
 	// FieldName may be the full name of the field, full path to the field, or the path suffix.
 	// e.g. all of the following would match spec.template.spec.containers.image --
@@ -35,10 +39,14 @@ type SetterCreator struct {
 }
 
 func (c SetterCreator) Create(openAPIPath, resourcesPath string) error {
+	schema, err := schemaFromFile(c.SchemaPath)
+	if err != nil {
+		return err
+	}
 	// Update the OpenAPI definitions to hace the setter
 	sd := setters2.SetterDefinition{
 		Name: c.Name, Value: c.FieldValue, Description: c.Description, SetBy: c.SetBy,
-		Type: c.Type,
+		Type: c.Type, Schema: schema,
 	}
 	if err := sd.AddToFile(openAPIPath); err != nil {
 		return err
@@ -62,3 +70,15 @@ func (c SetterCreator) Create(openAPIPath, resourcesPath string) error {
 		Outputs: []kio.Writer{inout},
 	}.Execute()
 }
+
+// schemaFromFile reads the contents from schemaPath and returns schema
+func schemaFromFile(schemaPath string) (string, error) {
+	if schemaPath == "" {
+		return "", nil
+	}
+	sch, err := ioutil.ReadFile(schemaPath)
+	if err != nil {
+		return "", err
+	}
+	return string(sch), nil
+}

kyaml/testutil/testutil.go

@@ -1,3 +1,6 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package testutil_test
 
 import (