adding support for JSON Schema 2020

Signed-off-by: Kurnia D Win <kurnia.d.win@gmail.com>

go.mod

@@ -29,6 +29,7 @@ require (
 	github.com/phayes/freeport v0.0.0-20220201140144-74d24b5ae9f5
 	github.com/pkg/errors v0.9.1
 	github.com/rubenv/sql-migrate v1.7.1
+	github.com/santhosh-tekuri/jsonschema/v6 v6.0.1
 	github.com/sirupsen/logrus v1.9.3
 	github.com/spf13/cobra v1.8.1
 	github.com/spf13/pflag v1.0.5

go.sum

@@ -83,6 +83,8 @@ github.com/distribution/distribution/v3 v3.0.0-rc.2 h1:tTrzntanYMbd20SyvdeR83Ya1
 github.com/distribution/distribution/v3 v3.0.0-rc.2/go.mod h1:H2zIRRXS20ylnv2HTuKILAWuANjuA60GB7MLOsQag7Y=
 github.com/distribution/reference v0.6.0 h1:0IXCQ5g4/QMHHkarYzh5l+u8T3t73zM5QvfrDyIgxBk=
 github.com/distribution/reference v0.6.0/go.mod h1:BbU0aIcezP1/5jX/8MP0YiH4SdvB5Y4f/wlDRiLyi3E=
+github.com/dlclark/regexp2 v1.11.0 h1:G/nrcoOa7ZXlpoa/91N3X7mM3r8eIlMBBJZvsz/mxKI=
+github.com/dlclark/regexp2 v1.11.0/go.mod h1:DHkYz0B9wPfa6wondMfaivmHpzrQ3v9q8cnmRbL6yW8=
 github.com/docker/cli v27.1.0+incompatible h1:P0KSYmPtNbmx59wHZvG6+rjivhKDRA1BvvWM0f5DgHc=
 github.com/docker/cli v27.1.0+incompatible/go.mod h1:JLrzqnKDaYBop7H2jaqPtU4hHvMKP+vjCwu2uszcLI8=
 github.com/docker/distribution v2.8.3+incompatible h1:AtKxIZ36LoNK51+Z6RpzLpddBirtxJnzDrHLEKxTAYk=
@@ -330,6 +332,8 @@ github.com/rubenv/sql-migrate v1.7.1 h1:f/o0WgfO/GqNuVg+6801K/KW3WdDSupzSjDYODmi
 github.com/rubenv/sql-migrate v1.7.1/go.mod h1:Ob2Psprc0/3ggbM6wCzyYVFFuc6FyZrb2AS+ezLDFb4=
 github.com/russross/blackfriday/v2 v2.1.0 h1:JIOH55/0cWyOuilr9/qlrm0BSXldqnqwMsf35Ld67mk=
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
+github.com/santhosh-tekuri/jsonschema/v6 v6.0.1 h1:PKK9DyHxif4LZo+uQSgXNqs0jj5+xZwwfKHgph2lxBw=
+github.com/santhosh-tekuri/jsonschema/v6 v6.0.1/go.mod h1:JXeL+ps8p7/KNMjDQk3TCwPpBy0wYklyWTfbkIzdIFU=
 github.com/sergi/go-diff v1.2.0 h1:XU+rvMAioB0UC3q1MFrIQy4Vo5/4VsRDQQXHsEya6xQ=
 github.com/sergi/go-diff v1.2.0/go.mod h1:STckp+ISIX8hZLjrqAeVduY0gWCT9IjLuqbuNXdaHfM=
 github.com/shopspring/decimal v1.4.0 h1:bxl37RwXBklmTi0C79JfXCEBD1cqqHt0bbgBAGFp81k=

pkg/chartutil/jsonschema.go

@@ -18,10 +18,12 @@ package chartutil
 
 import (
 	"bytes"
+	"encoding/json"
 	"fmt"
 	"strings"
 
 	"github.com/pkg/errors"
+	"github.com/santhosh-tekuri/jsonschema/v6"
 	"github.com/xeipuuv/gojsonschema"
 	"sigs.k8s.io/yaml"
 
@@ -73,6 +75,11 @@ func ValidateAgainstSingleSchema(values Values, schemaJSON []byte) (reterr error
 	if bytes.Equal(valuesJSON, []byte("null")) {
 		valuesJSON = []byte("{}")
 	}
+
+	if schemaIs2020(schemaJSON) {
+		return validateUsingNewValidator(valuesJSON, schemaJSON)
+	}
+
 	schemaLoader := gojsonschema.NewBytesLoader(schemaJSON)
 	valuesLoader := gojsonschema.NewBytesLoader(valuesJSON)
 
@@ -91,3 +98,35 @@ func ValidateAgainstSingleSchema(values Values, schemaJSON []byte) (reterr error
 
 	return nil
 }
+
+func validateUsingNewValidator(valuesJSON, schemaJSON []byte) error {
+	schema, err := jsonschema.UnmarshalJSON(bytes.NewReader(schemaJSON))
+	if err != nil {
+		return err
+	}
+	values, err := jsonschema.UnmarshalJSON(bytes.NewReader(valuesJSON))
+	if err != nil {
+		return err
+	}
+
+	compiler := jsonschema.NewCompiler()
+	err = compiler.AddResource("file:///values.schema.json", schema)
+	if err != nil {
+		return err
+	}
+
+	validator, err := compiler.Compile("file:///values.schema.json")
+	if err != nil {
+		return err
+	}
+
+	return validator.Validate(values)
+}
+
+func schemaIs2020(schemaJSON []byte) bool {
+	var partialSchema struct {
+		Schema string `json:"$schema"`
+	}
+	_ = json.Unmarshal(schemaJSON, &partialSchema)
+	return partialSchema.Schema == "https://json-schema.org/draft/2020-12/schema"
+}

pkg/chartutil/jsonschema_test.go

@@ -104,6 +104,21 @@ const subchartSchema = `{
 }
 `
 
+const subchartSchema2020 = `{
+	"$schema": "https://json-schema.org/draft/2020-12/schema",
+	"title": "Values",
+	"type": "object",
+	"properties": {
+		"data": {
+			"type": "array",
+			"contains": { "type": "string" },
+			"unevaluatedItems": { "type": "number" }
+		}
+	},
+	"required": ["data"]
+}
+`
+
 func TestValidateAgainstSchema(t *testing.T) {
 	subchartJSON := []byte(subchartSchema)
 	subchart := &chart.Chart{
@@ -165,3 +180,68 @@ func TestValidateAgainstSchemaNegative(t *testing.T) {
 		t.Errorf("Error string :\n`%s`\ndoes not match expected\n`%s`", errString, expectedErrString)
 	}
 }
+
+func TestValidateAgainstSchema2020(t *testing.T) {
+	subchartJSON := []byte(subchartSchema2020)
+	subchart := &chart.Chart{
+		Metadata: &chart.Metadata{
+			Name: "subchart",
+		},
+		Schema: subchartJSON,
+	}
+	chrt := &chart.Chart{
+		Metadata: &chart.Metadata{
+			Name: "chrt",
+		},
+	}
+	chrt.AddDependency(subchart)
+
+	vals := map[string]interface{}{
+		"name": "John",
+		"subchart": map[string]interface{}{
+			"data": []any{"hello", 12},
+		},
+	}
+
+	if err := ValidateAgainstSchema(chrt, vals); err != nil {
+		t.Errorf("Error validating Values against Schema: %s", err)
+	}
+}
+
+func TestValidateAgainstSchema2020Negative(t *testing.T) {
+	subchartJSON := []byte(subchartSchema2020)
+	subchart := &chart.Chart{
+		Metadata: &chart.Metadata{
+			Name: "subchart",
+		},
+		Schema: subchartJSON,
+	}
+	chrt := &chart.Chart{
+		Metadata: &chart.Metadata{
+			Name: "chrt",
+		},
+	}
+	chrt.AddDependency(subchart)
+
+	vals := map[string]interface{}{
+		"name": "John",
+		"subchart": map[string]interface{}{
+			"data": []any{12},
+		},
+	}
+
+	var errString string
+	if err := ValidateAgainstSchema(chrt, vals); err == nil {
+		t.Fatalf("Expected an error, but got nil")
+	} else {
+		errString = err.Error()
+	}
+
+	expectedErrString := `subchart:
+jsonschema validation failed with 'file:///values.schema.json#'
+- at '/data': no items match contains schema
+  - at '/data/0': got number, want string`
+	if errString != expectedErrString {
+		t.Errorf("Error string :\n`%s`\ndoes not match expected\n`%s`", errString, expectedErrString)
+	}
+}