pin dependencies

Signed-off-by: Roland.Ma <rolandma@yunify.com>

vendor/helm.sh/helm/v3/pkg/lint/rules/chartfile.go

@@ -0,0 +1,210 @@
+/*
+Copyright The Helm Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package rules // import "helm.sh/helm/v3/pkg/lint/rules"
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+
+	"github.com/Masterminds/semver/v3"
+	"github.com/asaskevich/govalidator"
+	"github.com/pkg/errors"
+	"sigs.k8s.io/yaml"
+
+	"helm.sh/helm/v3/pkg/chart"
+	"helm.sh/helm/v3/pkg/chartutil"
+	"helm.sh/helm/v3/pkg/lint/support"
+)
+
+// Chartfile runs a set of linter rules related to Chart.yaml file
+func Chartfile(linter *support.Linter) {
+	chartFileName := "Chart.yaml"
+	chartPath := filepath.Join(linter.ChartDir, chartFileName)
+
+	linter.RunLinterRule(support.ErrorSev, chartFileName, validateChartYamlNotDirectory(chartPath))
+
+	chartFile, err := chartutil.LoadChartfile(chartPath)
+	validChartFile := linter.RunLinterRule(support.ErrorSev, chartFileName, validateChartYamlFormat(err))
+
+	// Guard clause. Following linter rules require a parsable ChartFile
+	if !validChartFile {
+		return
+	}
+
+	// type check for Chart.yaml . ignoring error as any parse
+	// errors would already be caught in the above load function
+	chartFileForTypeCheck, _ := loadChartFileForTypeCheck(chartPath)
+
+	linter.RunLinterRule(support.ErrorSev, chartFileName, validateChartName(chartFile))
+
+	// Chart metadata
+	linter.RunLinterRule(support.ErrorSev, chartFileName, validateChartAPIVersion(chartFile))
+
+	linter.RunLinterRule(support.ErrorSev, chartFileName, validateChartVersionType(chartFileForTypeCheck))
+	linter.RunLinterRule(support.ErrorSev, chartFileName, validateChartVersion(chartFile))
+	linter.RunLinterRule(support.ErrorSev, chartFileName, validateChartAppVersionType(chartFileForTypeCheck))
+	linter.RunLinterRule(support.ErrorSev, chartFileName, validateChartMaintainer(chartFile))
+	linter.RunLinterRule(support.ErrorSev, chartFileName, validateChartSources(chartFile))
+	linter.RunLinterRule(support.InfoSev, chartFileName, validateChartIconPresence(chartFile))
+	linter.RunLinterRule(support.ErrorSev, chartFileName, validateChartIconURL(chartFile))
+	linter.RunLinterRule(support.ErrorSev, chartFileName, validateChartType(chartFile))
+	linter.RunLinterRule(support.ErrorSev, chartFileName, validateChartDependencies(chartFile))
+}
+
+func validateChartVersionType(data map[string]interface{}) error {
+	return isStringValue(data, "version")
+}
+
+func validateChartAppVersionType(data map[string]interface{}) error {
+	return isStringValue(data, "appVersion")
+}
+
+func isStringValue(data map[string]interface{}, key string) error {
+	value, ok := data[key]
+	if !ok {
+		return nil
+	}
+	valueType := fmt.Sprintf("%T", value)
+	if valueType != "string" {
+		return errors.Errorf("%s should be of type string but it's of type %s", key, valueType)
+	}
+	return nil
+}
+
+func validateChartYamlNotDirectory(chartPath string) error {
+	fi, err := os.Stat(chartPath)
+
+	if err == nil && fi.IsDir() {
+		return errors.New("should be a file, not a directory")
+	}
+	return nil
+}
+
+func validateChartYamlFormat(chartFileError error) error {
+	if chartFileError != nil {
+		return errors.Errorf("unable to parse YAML\n\t%s", chartFileError.Error())
+	}
+	return nil
+}
+
+func validateChartName(cf *chart.Metadata) error {
+	if cf.Name == "" {
+		return errors.New("name is required")
+	}
+	return nil
+}
+
+func validateChartAPIVersion(cf *chart.Metadata) error {
+	if cf.APIVersion == "" {
+		return errors.New("apiVersion is required. The value must be either \"v1\" or \"v2\"")
+	}
+
+	if cf.APIVersion != chart.APIVersionV1 && cf.APIVersion != chart.APIVersionV2 {
+		return fmt.Errorf("apiVersion '%s' is not valid. The value must be either \"v1\" or \"v2\"", cf.APIVersion)
+	}
+
+	return nil
+}
+
+func validateChartVersion(cf *chart.Metadata) error {
+	if cf.Version == "" {
+		return errors.New("version is required")
+	}
+
+	version, err := semver.NewVersion(cf.Version)
+
+	if err != nil {
+		return errors.Errorf("version '%s' is not a valid SemVer", cf.Version)
+	}
+
+	c, err := semver.NewConstraint(">0.0.0-0")
+	if err != nil {
+		return err
+	}
+	valid, msg := c.Validate(version)
+
+	if !valid && len(msg) > 0 {
+		return errors.Errorf("version %v", msg[0])
+	}
+
+	return nil
+}
+
+func validateChartMaintainer(cf *chart.Metadata) error {
+	for _, maintainer := range cf.Maintainers {
+		if maintainer.Name == "" {
+			return errors.New("each maintainer requires a name")
+		} else if maintainer.Email != "" && !govalidator.IsEmail(maintainer.Email) {
+			return errors.Errorf("invalid email '%s' for maintainer '%s'", maintainer.Email, maintainer.Name)
+		} else if maintainer.URL != "" && !govalidator.IsURL(maintainer.URL) {
+			return errors.Errorf("invalid url '%s' for maintainer '%s'", maintainer.URL, maintainer.Name)
+		}
+	}
+	return nil
+}
+
+func validateChartSources(cf *chart.Metadata) error {
+	for _, source := range cf.Sources {
+		if source == "" || !govalidator.IsRequestURL(source) {
+			return errors.Errorf("invalid source URL '%s'", source)
+		}
+	}
+	return nil
+}
+
+func validateChartIconPresence(cf *chart.Metadata) error {
+	if cf.Icon == "" {
+		return errors.New("icon is recommended")
+	}
+	return nil
+}
+
+func validateChartIconURL(cf *chart.Metadata) error {
+	if cf.Icon != "" && !govalidator.IsRequestURL(cf.Icon) {
+		return errors.Errorf("invalid icon URL '%s'", cf.Icon)
+	}
+	return nil
+}
+
+func validateChartDependencies(cf *chart.Metadata) error {
+	if len(cf.Dependencies) > 0 && cf.APIVersion != chart.APIVersionV2 {
+		return fmt.Errorf("dependencies are not valid in the Chart file with apiVersion '%s'. They are valid in apiVersion '%s'", cf.APIVersion, chart.APIVersionV2)
+	}
+	return nil
+}
+
+func validateChartType(cf *chart.Metadata) error {
+	if len(cf.Type) > 0 && cf.APIVersion != chart.APIVersionV2 {
+		return fmt.Errorf("chart type is not valid in apiVersion '%s'. It is valid in apiVersion '%s'", cf.APIVersion, chart.APIVersionV2)
+	}
+	return nil
+}
+
+// loadChartFileForTypeCheck loads the Chart.yaml
+// in a generic form of a map[string]interface{}, so that the type
+// of the values can be checked
+func loadChartFileForTypeCheck(filename string) (map[string]interface{}, error) {
+	b, err := ioutil.ReadFile(filename)
+	if err != nil {
+		return nil, err
+	}
+	y := make(map[string]interface{})
+	err = yaml.Unmarshal(b, &y)
+	return y, err
+}

vendor/helm.sh/helm/v3/pkg/lint/rules/dependencies.go

@@ -0,0 +1,82 @@
+/*
+Copyright The Helm Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package rules // import "helm.sh/helm/v3/pkg/lint/rules"
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/pkg/errors"
+
+	"helm.sh/helm/v3/pkg/chart"
+	"helm.sh/helm/v3/pkg/chart/loader"
+	"helm.sh/helm/v3/pkg/lint/support"
+)
+
+// Dependencies runs lints against a chart's dependencies
+//
+// See https://github.com/helm/helm/issues/7910
+func Dependencies(linter *support.Linter) {
+	c, err := loader.LoadDir(linter.ChartDir)
+	if !linter.RunLinterRule(support.ErrorSev, "", validateChartFormat(err)) {
+		return
+	}
+
+	linter.RunLinterRule(support.ErrorSev, linter.ChartDir, validateDependencyInMetadata(c))
+	linter.RunLinterRule(support.WarningSev, linter.ChartDir, validateDependencyInChartsDir(c))
+}
+
+func validateChartFormat(chartError error) error {
+	if chartError != nil {
+		return errors.Errorf("unable to load chart\n\t%s", chartError)
+	}
+	return nil
+}
+
+func validateDependencyInChartsDir(c *chart.Chart) (err error) {
+	dependencies := map[string]struct{}{}
+	missing := []string{}
+	for _, dep := range c.Dependencies() {
+		dependencies[dep.Metadata.Name] = struct{}{}
+	}
+	for _, dep := range c.Metadata.Dependencies {
+		if _, ok := dependencies[dep.Name]; !ok {
+			missing = append(missing, dep.Name)
+		}
+	}
+	if len(missing) > 0 {
+		err = fmt.Errorf("chart directory is missing these dependencies: %s", strings.Join(missing, ","))
+	}
+	return err
+}
+
+func validateDependencyInMetadata(c *chart.Chart) (err error) {
+	dependencies := map[string]struct{}{}
+	missing := []string{}
+	for _, dep := range c.Metadata.Dependencies {
+		dependencies[dep.Name] = struct{}{}
+	}
+	for _, dep := range c.Dependencies() {
+		if _, ok := dependencies[dep.Metadata.Name]; !ok {
+			missing = append(missing, dep.Metadata.Name)
+		}
+	}
+	if len(missing) > 0 {
+		err = fmt.Errorf("chart metadata is missing these dependencies: %s", strings.Join(missing, ","))
+	}
+	return err
+}

vendor/helm.sh/helm/v3/pkg/lint/rules/deprecations.go

@@ -0,0 +1,84 @@
+/*
+Copyright The Helm Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package rules // import "helm.sh/helm/v3/pkg/lint/rules"
+
+import (
+	"fmt"
+
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+	"k8s.io/apiserver/pkg/endpoints/deprecation"
+	kscheme "k8s.io/client-go/kubernetes/scheme"
+)
+
+const (
+	// This should be set in the Makefile based on the version of client-go being imported.
+	// These constants will be overwritten with LDFLAGS
+	k8sVersionMajor = 1
+	k8sVersionMinor = 20
+)
+
+// deprecatedAPIError indicates than an API is deprecated in Kubernetes
+type deprecatedAPIError struct {
+	Deprecated string
+	Message    string
+}
+
+func (e deprecatedAPIError) Error() string {
+	msg := e.Message
+	return msg
+}
+
+func validateNoDeprecations(resource *K8sYamlStruct) error {
+	// if `resource` does not have an APIVersion or Kind, we cannot test it for deprecation
+	if resource.APIVersion == "" {
+		return nil
+	}
+	if resource.Kind == "" {
+		return nil
+	}
+
+	runtimeObject, err := resourceToRuntimeObject(resource)
+	if err != nil {
+		// do not error for non-kubernetes resources
+		if runtime.IsNotRegisteredError(err) {
+			return nil
+		}
+		return err
+	}
+	if !deprecation.IsDeprecated(runtimeObject, k8sVersionMajor, k8sVersionMinor) {
+		return nil
+	}
+	gvk := fmt.Sprintf("%s %s", resource.APIVersion, resource.Kind)
+	return deprecatedAPIError{
+		Deprecated: gvk,
+		Message:    deprecation.WarningMessage(runtimeObject),
+	}
+}
+
+func resourceToRuntimeObject(resource *K8sYamlStruct) (runtime.Object, error) {
+	scheme := runtime.NewScheme()
+	kscheme.AddToScheme(scheme)
+
+	gvk := schema.FromAPIVersionAndKind(resource.APIVersion, resource.Kind)
+	out, err := scheme.New(gvk)
+	if err != nil {
+		return nil, err
+	}
+	out.GetObjectKind().SetGroupVersionKind(gvk)
+	return out, nil
+}

vendor/helm.sh/helm/v3/pkg/lint/rules/template.go

@@ -0,0 +1,310 @@
+/*
+Copyright The Helm Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package rules
+
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+	"path"
+	"path/filepath"
+	"regexp"
+	"strings"
+
+	"github.com/pkg/errors"
+	"k8s.io/apimachinery/pkg/api/validation"
+	apipath "k8s.io/apimachinery/pkg/api/validation/path"
+	"k8s.io/apimachinery/pkg/util/validation/field"
+	"k8s.io/apimachinery/pkg/util/yaml"
+
+	"helm.sh/helm/v3/pkg/chart/loader"
+	"helm.sh/helm/v3/pkg/chartutil"
+	"helm.sh/helm/v3/pkg/engine"
+	"helm.sh/helm/v3/pkg/lint/support"
+)
+
+var (
+	crdHookSearch     = regexp.MustCompile(`"?helm\.sh/hook"?:\s+crd-install`)
+	releaseTimeSearch = regexp.MustCompile(`\.Release\.Time`)
+)
+
+// Templates lints the templates in the Linter.
+func Templates(linter *support.Linter, values map[string]interface{}, namespace string, strict bool) {
+	fpath := "templates/"
+	templatesPath := filepath.Join(linter.ChartDir, fpath)
+
+	templatesDirExist := linter.RunLinterRule(support.WarningSev, fpath, validateTemplatesDir(templatesPath))
+
+	// Templates directory is optional for now
+	if !templatesDirExist {
+		return
+	}
+
+	// Load chart and parse templates
+	chart, err := loader.Load(linter.ChartDir)
+
+	chartLoaded := linter.RunLinterRule(support.ErrorSev, fpath, err)
+
+	if !chartLoaded {
+		return
+	}
+
+	options := chartutil.ReleaseOptions{
+		Name:      "test-release",
+		Namespace: namespace,
+	}
+
+	cvals, err := chartutil.CoalesceValues(chart, values)
+	if err != nil {
+		return
+	}
+	valuesToRender, err := chartutil.ToRenderValues(chart, cvals, options, nil)
+	if err != nil {
+		linter.RunLinterRule(support.ErrorSev, fpath, err)
+		return
+	}
+	var e engine.Engine
+	e.LintMode = true
+	renderedContentMap, err := e.Render(chart, valuesToRender)
+
+	renderOk := linter.RunLinterRule(support.ErrorSev, fpath, err)
+
+	if !renderOk {
+		return
+	}
+
+	/* Iterate over all the templates to check:
+	- It is a .yaml file
+	- All the values in the template file is defined
+	- {{}} include | quote
+	- Generated content is a valid Yaml file
+	- Metadata.Namespace is not set
+	*/
+	for _, template := range chart.Templates {
+		fileName, data := template.Name, template.Data
+		fpath = fileName
+
+		linter.RunLinterRule(support.ErrorSev, fpath, validateAllowedExtension(fileName))
+		// These are v3 specific checks to make sure and warn people if their
+		// chart is not compatible with v3
+		linter.RunLinterRule(support.WarningSev, fpath, validateNoCRDHooks(data))
+		linter.RunLinterRule(support.ErrorSev, fpath, validateNoReleaseTime(data))
+
+		// We only apply the following lint rules to yaml files
+		if filepath.Ext(fileName) != ".yaml" || filepath.Ext(fileName) == ".yml" {
+			continue
+		}
+
+		// NOTE: disabled for now, Refs https://github.com/helm/helm/issues/1463
+		// Check that all the templates have a matching value
+		//linter.RunLinterRule(support.WarningSev, fpath, validateNoMissingValues(templatesPath, valuesToRender, preExecutedTemplate))
+
+		// NOTE: disabled for now, Refs https://github.com/helm/helm/issues/1037
+		// linter.RunLinterRule(support.WarningSev, fpath, validateQuotes(string(preExecutedTemplate)))
+
+		renderedContent := renderedContentMap[path.Join(chart.Name(), fileName)]
+		if strings.TrimSpace(renderedContent) != "" {
+			linter.RunLinterRule(support.WarningSev, fpath, validateTopIndentLevel(renderedContent))
+
+			decoder := yaml.NewYAMLOrJSONDecoder(strings.NewReader(renderedContent), 4096)
+
+			// Lint all resources if the file contains multiple documents separated by ---
+			for {
+				// Even though K8sYamlStruct only defines a few fields, an error in any other
+				// key will be raised as well
+				var yamlStruct *K8sYamlStruct
+
+				err := decoder.Decode(&yamlStruct)
+				if err == io.EOF {
+					break
+				}
+
+				// If YAML linting fails, we sill progress. So we don't capture the returned state
+				// on this linter run.
+				linter.RunLinterRule(support.ErrorSev, fpath, validateYamlContent(err))
+
+				if yamlStruct != nil {
+					// NOTE: set to warnings to allow users to support out-of-date kubernetes
+					// Refs https://github.com/helm/helm/issues/8596
+					linter.RunLinterRule(support.WarningSev, fpath, validateMetadataName(yamlStruct))
+					linter.RunLinterRule(support.WarningSev, fpath, validateNoDeprecations(yamlStruct))
+
+					linter.RunLinterRule(support.ErrorSev, fpath, validateMatchSelector(yamlStruct, renderedContent))
+				}
+			}
+		}
+	}
+}
+
+// validateTopIndentLevel checks that the content does not start with an indent level > 0.
+//
+// This error can occur when a template accidentally inserts space. It can cause
+// unpredictable errors depending on whether the text is normalized before being passed
+// into the YAML parser. So we trap it here.
+//
+// See https://github.com/helm/helm/issues/8467
+func validateTopIndentLevel(content string) error {
+	// Read lines until we get to a non-empty one
+	scanner := bufio.NewScanner(bytes.NewBufferString(content))
+	for scanner.Scan() {
+		line := scanner.Text()
+		// If line is empty, skip
+		if strings.TrimSpace(line) == "" {
+			continue
+		}
+		// If it starts with one or more spaces, this is an error
+		if strings.HasPrefix(line, " ") || strings.HasPrefix(line, "\t") {
+			return fmt.Errorf("document starts with an illegal indent: %q, which may cause parsing problems", line)
+		}
+		// Any other condition passes.
+		return nil
+	}
+	return scanner.Err()
+}
+
+// Validation functions
+func validateTemplatesDir(templatesPath string) error {
+	if fi, err := os.Stat(templatesPath); err != nil {
+		return errors.New("directory not found")
+	} else if !fi.IsDir() {
+		return errors.New("not a directory")
+	}
+	return nil
+}
+
+func validateAllowedExtension(fileName string) error {
+	ext := filepath.Ext(fileName)
+	validExtensions := []string{".yaml", ".yml", ".tpl", ".txt"}
+
+	for _, b := range validExtensions {
+		if b == ext {
+			return nil
+		}
+	}
+
+	return errors.Errorf("file extension '%s' not valid. Valid extensions are .yaml, .yml, .tpl, or .txt", ext)
+}
+
+func validateYamlContent(err error) error {
+	return errors.Wrap(err, "unable to parse YAML")
+}
+
+// validateMetadataName uses the correct validation function for the object
+// Kind, or if not set, defaults to the standard definition of a subdomain in
+// DNS (RFC 1123), used by most resources.
+func validateMetadataName(obj *K8sYamlStruct) error {
+	fn := validateMetadataNameFunc(obj)
+	allErrs := field.ErrorList{}
+	for _, msg := range fn(obj.Metadata.Name, false) {
+		allErrs = append(allErrs, field.Invalid(field.NewPath("metadata").Child("name"), obj.Metadata.Name, msg))
+	}
+	if len(allErrs) > 0 {
+		return errors.Wrapf(allErrs.ToAggregate(), "object name does not conform to Kubernetes naming requirements: %q", obj.Metadata.Name)
+	}
+	return nil
+}
+
+// validateMetadataNameFunc will return a name validation function for the
+// object kind, if defined below.
+//
+// Rules should match those set in the various api validations:
+// https://github.com/kubernetes/kubernetes/blob/v1.20.0/pkg/apis/core/validation/validation.go#L205-L274
+// https://github.com/kubernetes/kubernetes/blob/v1.20.0/pkg/apis/apps/validation/validation.go#L39
+// ...
+//
+// Implementing here to avoid importing k/k.
+//
+// If no mapping is defined, returns NameIsDNSSubdomain.  This is used by object
+// kinds that don't have special requirements, so is the most likely to work if
+// new kinds are added.
+func validateMetadataNameFunc(obj *K8sYamlStruct) validation.ValidateNameFunc {
+	switch strings.ToLower(obj.Kind) {
+	case "pod", "node", "secret", "endpoints", "resourcequota", // core
+		"controllerrevision", "daemonset", "deployment", "replicaset", "statefulset", // apps
+		"autoscaler",     // autoscaler
+		"cronjob", "job", // batch
+		"lease",                    // coordination
+		"endpointslice",            // discovery
+		"networkpolicy", "ingress", // networking
+		"podsecuritypolicy",                           // policy
+		"priorityclass",                               // scheduling
+		"podpreset",                                   // settings
+		"storageclass", "volumeattachment", "csinode": // storage
+		return validation.NameIsDNSSubdomain
+	case "service":
+		return validation.NameIsDNS1035Label
+	case "namespace":
+		return validation.ValidateNamespaceName
+	case "serviceaccount":
+		return validation.ValidateServiceAccountName
+	case "certificatesigningrequest":
+		// No validation.
+		// https://github.com/kubernetes/kubernetes/blob/v1.20.0/pkg/apis/certificates/validation/validation.go#L137-L140
+		return func(name string, prefix bool) []string { return nil }
+	case "role", "clusterrole", "rolebinding", "clusterrolebinding":
+		// https://github.com/kubernetes/kubernetes/blob/v1.20.0/pkg/apis/rbac/validation/validation.go#L32-L34
+		return func(name string, prefix bool) []string {
+			return apipath.IsValidPathSegmentName(name)
+		}
+	default:
+		return validation.NameIsDNSSubdomain
+	}
+}
+
+func validateNoCRDHooks(manifest []byte) error {
+	if crdHookSearch.Match(manifest) {
+		return errors.New("manifest is a crd-install hook. This hook is no longer supported in v3 and all CRDs should also exist the crds/ directory at the top level of the chart")
+	}
+	return nil
+}
+
+func validateNoReleaseTime(manifest []byte) error {
+	if releaseTimeSearch.Match(manifest) {
+		return errors.New(".Release.Time has been removed in v3, please replace with the `now` function in your templates")
+	}
+	return nil
+}
+
+// validateMatchSelector ensures that template specs have a selector declared.
+// See https://github.com/helm/helm/issues/1990
+func validateMatchSelector(yamlStruct *K8sYamlStruct, manifest string) error {
+	switch yamlStruct.Kind {
+	case "Deployment", "ReplicaSet", "DaemonSet", "StatefulSet":
+		// verify that matchLabels or matchExpressions is present
+		if !(strings.Contains(manifest, "matchLabels") || strings.Contains(manifest, "matchExpressions")) {
+			return fmt.Errorf("a %s must contain matchLabels or matchExpressions, and %q does not", yamlStruct.Kind, yamlStruct.Metadata.Name)
+		}
+	}
+	return nil
+}
+
+// K8sYamlStruct stubs a Kubernetes YAML file.
+//
+// DEPRECATED: In Helm 4, this will be made a private type, as it is for use only within
+// the rules package.
+type K8sYamlStruct struct {
+	APIVersion string `json:"apiVersion"`
+	Kind       string
+	Metadata   k8sYamlMetadata
+}
+
+type k8sYamlMetadata struct {
+	Namespace string
+	Name      string
+}

vendor/helm.sh/helm/v3/pkg/lint/rules/values.go

@@ -0,0 +1,87 @@
+/*
+Copyright The Helm Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package rules
+
+import (
+	"io/ioutil"
+	"os"
+	"path/filepath"
+
+	"github.com/pkg/errors"
+
+	"helm.sh/helm/v3/pkg/chartutil"
+	"helm.sh/helm/v3/pkg/lint/support"
+)
+
+// Values lints a chart's values.yaml file.
+//
+// This function is deprecated and will be removed in Helm 4.
+func Values(linter *support.Linter) {
+	ValuesWithOverrides(linter, map[string]interface{}{})
+}
+
+// ValuesWithOverrides tests the values.yaml file.
+//
+// If a schema is present in the chart, values are tested against that. Otherwise,
+// they are only tested for well-formedness.
+//
+// If additional values are supplied, they are coalesced into the values in values.yaml.
+func ValuesWithOverrides(linter *support.Linter, values map[string]interface{}) {
+	file := "values.yaml"
+	vf := filepath.Join(linter.ChartDir, file)
+	fileExists := linter.RunLinterRule(support.InfoSev, file, validateValuesFileExistence(vf))
+
+	if !fileExists {
+		return
+	}
+
+	linter.RunLinterRule(support.ErrorSev, file, validateValuesFile(vf, values))
+}
+
+func validateValuesFileExistence(valuesPath string) error {
+	_, err := os.Stat(valuesPath)
+	if err != nil {
+		return errors.Errorf("file does not exist")
+	}
+	return nil
+}
+
+func validateValuesFile(valuesPath string, overrides map[string]interface{}) error {
+	values, err := chartutil.ReadValuesFile(valuesPath)
+	if err != nil {
+		return errors.Wrap(err, "unable to parse YAML")
+	}
+
+	// Helm 3.0.0 carried over the values linting from Helm 2.x, which only tests the top
+	// level values against the top-level expectations. Subchart values are not linted.
+	// We could change that. For now, though, we retain that strategy, and thus can
+	// coalesce tables (like reuse-values does) instead of doing the full chart
+	// CoalesceValues
+	coalescedValues := chartutil.CoalesceTables(make(map[string]interface{}, len(overrides)), overrides)
+	coalescedValues = chartutil.CoalesceTables(coalescedValues, values)
+
+	ext := filepath.Ext(valuesPath)
+	schemaPath := valuesPath[:len(valuesPath)-len(ext)] + ".schema.json"
+	schema, err := ioutil.ReadFile(schemaPath)
+	if len(schema) == 0 {
+		return nil
+	}
+	if err != nil {
+		return err
+	}
+	return chartutil.ValidateAgainstSingleSchema(coalescedValues, schema)
+}