update vendor

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

vendor/helm.sh/helm/v3/pkg/plugin/plugin.go

@@ -20,9 +20,11 @@ import (
 	"io/ioutil"
 	"os"
 	"path/filepath"
+	"regexp"
 	"runtime"
 	"strings"
 
+	"github.com/pkg/errors"
 	"sigs.k8s.io/yaml"
 
 	"helm.sh/helm/v3/pkg/cli"
@@ -94,6 +96,12 @@ type Metadata struct {
 	// Downloaders field is used if the plugin supply downloader mechanism
 	// for special protocols.
 	Downloaders []Downloaders `json:"downloaders"`
+
+	// UseTunnelDeprecated indicates that this command needs a tunnel.
+	// Setting this will cause a number of side effects, such as the
+	// automatic setting of HELM_HOST.
+	// DEPRECATED and unused, but retained for backwards compatibility with Helm 2 plugins. Remove in Helm 4
+	UseTunnelDeprecated bool `json:"useTunnel,omitempty"`
 }
 
 // Plugin represents a plugin.
@@ -157,18 +165,51 @@ func (p *Plugin) PrepareCommand(extraArgs []string) (string, []string, error) {
 	return main, baseArgs, nil
 }
 
+// validPluginName is a regular expression that validates plugin names.
+//
+// Plugin names can only contain the ASCII characters a-z, A-Z, 0-9, ​_​ and ​-.
+var validPluginName = regexp.MustCompile("^[A-Za-z0-9_-]+$")
+
+// validatePluginData validates a plugin's YAML data.
+func validatePluginData(plug *Plugin, filepath string) error {
+	if !validPluginName.MatchString(plug.Metadata.Name) {
+		return fmt.Errorf("invalid plugin name at %q", filepath)
+	}
+	// We could also validate SemVer, executable, and other fields should we so choose.
+	return nil
+}
+
+func detectDuplicates(plugs []*Plugin) error {
+	names := map[string]string{}
+
+	for _, plug := range plugs {
+		if oldpath, ok := names[plug.Metadata.Name]; ok {
+			return fmt.Errorf(
+				"two plugins claim the name %q at %q and %q",
+				plug.Metadata.Name,
+				oldpath,
+				plug.Dir,
+			)
+		}
+		names[plug.Metadata.Name] = plug.Dir
+	}
+
+	return nil
+}
+
 // LoadDir loads a plugin from the given directory.
 func LoadDir(dirname string) (*Plugin, error) {
-	data, err := ioutil.ReadFile(filepath.Join(dirname, PluginFileName))
+	pluginfile := filepath.Join(dirname, PluginFileName)
+	data, err := ioutil.ReadFile(pluginfile)
 	if err != nil {
-		return nil, err
+		return nil, errors.Wrapf(err, "failed to read plugin at %q", pluginfile)
 	}
 
 	plug := &Plugin{Dir: dirname}
-	if err := yaml.Unmarshal(data, &plug.Metadata); err != nil {
-		return nil, err
+	if err := yaml.UnmarshalStrict(data, &plug.Metadata); err != nil {
+		return nil, errors.Wrapf(err, "failed to load plugin at %q", pluginfile)
 	}
-	return plug, nil
+	return plug, validatePluginData(plug, pluginfile)
 }
 
 // LoadAll loads all plugins found beneath the base directory.
@@ -180,7 +221,7 @@ func LoadAll(basedir string) ([]*Plugin, error) {
 	scanpath := filepath.Join(basedir, "*", PluginFileName)
 	matches, err := filepath.Glob(scanpath)
 	if err != nil {
-		return plugins, err
+		return plugins, errors.Wrapf(err, "failed to find plugins in %q", scanpath)
 	}
 
 	if matches == nil {
@@ -195,7 +236,7 @@ func LoadAll(basedir string) ([]*Plugin, error) {
 		}
 		plugins = append(plugins, p)
 	}
-	return plugins, nil
+	return plugins, detectDuplicates(plugins)
 }
 
 // FindPlugins returns a list of YAML files that describe plugins.