This is a huge commit, it does following things:

1. refactor kubesphere dependency service client creation, we can
disable dependency by config
2. dependencies can be configured by configuration file
3. refactor cmd package using cobra.Command, so we can use hypersphere
to invoke command sepearately. Later we only need to build one image to
contains all kubesphere core components. One command to rule them all!
4. live reloading configuration currently not implemented

vendor/k8s.io/component-base/cli/flag/namedcertkey_flag.go

@@ -0,0 +1,113 @@
+/*
+Copyright 2016 The Kubernetes 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 flag
+
+import (
+	"errors"
+	"flag"
+	"strings"
+)
+
+// NamedCertKey is a flag value parsing "certfile,keyfile" and "certfile,keyfile:name,name,name".
+type NamedCertKey struct {
+	Names             []string
+	CertFile, KeyFile string
+}
+
+var _ flag.Value = &NamedCertKey{}
+
+func (nkc *NamedCertKey) String() string {
+	s := nkc.CertFile + "," + nkc.KeyFile
+	if len(nkc.Names) > 0 {
+		s = s + ":" + strings.Join(nkc.Names, ",")
+	}
+	return s
+}
+
+func (nkc *NamedCertKey) Set(value string) error {
+	cs := strings.SplitN(value, ":", 2)
+	var keycert string
+	if len(cs) == 2 {
+		var names string
+		keycert, names = strings.TrimSpace(cs[0]), strings.TrimSpace(cs[1])
+		if names == "" {
+			return errors.New("empty names list is not allowed")
+		}
+		nkc.Names = nil
+		for _, name := range strings.Split(names, ",") {
+			nkc.Names = append(nkc.Names, strings.TrimSpace(name))
+		}
+	} else {
+		nkc.Names = nil
+		keycert = strings.TrimSpace(cs[0])
+	}
+	cs = strings.Split(keycert, ",")
+	if len(cs) != 2 {
+		return errors.New("expected comma separated certificate and key file paths")
+	}
+	nkc.CertFile = strings.TrimSpace(cs[0])
+	nkc.KeyFile = strings.TrimSpace(cs[1])
+	return nil
+}
+
+func (*NamedCertKey) Type() string {
+	return "namedCertKey"
+}
+
+// NamedCertKeyArray is a flag value parsing NamedCertKeys, each passed with its own
+// flag instance (in contrast to comma separated slices).
+type NamedCertKeyArray struct {
+	value   *[]NamedCertKey
+	changed bool
+}
+
+var _ flag.Value = &NamedCertKey{}
+
+// NewNamedKeyCertArray creates a new NamedCertKeyArray with the internal value
+// pointing to p.
+func NewNamedCertKeyArray(p *[]NamedCertKey) *NamedCertKeyArray {
+	return &NamedCertKeyArray{
+		value: p,
+	}
+}
+
+func (a *NamedCertKeyArray) Set(val string) error {
+	nkc := NamedCertKey{}
+	err := nkc.Set(val)
+	if err != nil {
+		return err
+	}
+	if !a.changed {
+		*a.value = []NamedCertKey{nkc}
+		a.changed = true
+	} else {
+		*a.value = append(*a.value, nkc)
+	}
+	return nil
+}
+
+func (a *NamedCertKeyArray) Type() string {
+	return "namedCertKey"
+}
+
+func (a *NamedCertKeyArray) String() string {
+	nkcs := make([]string, 0, len(*a.value))
+	for i := range *a.value {
+		nkcs = append(nkcs, (*a.value)[i].String())
+	}
+	return "[" + strings.Join(nkcs, ";") + "]"
+}