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

pkg/simple/client/devops/devops.go

@@ -0,0 +1,109 @@
+/*
+Copyright 2018 The KubeSphere 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 devops
+
+import (
+	"fmt"
+	"k8s.io/klog"
+	"kubesphere.io/kubesphere/pkg/gojenkins"
+	"sync"
+)
+
+const (
+	JenkinsAllUserRoleName = "kubesphere-user"
+)
+
+type DevopsClient struct {
+	jenkinsClient *gojenkins.Jenkins
+}
+
+func NewDevopsClient(options *DevopsOptions) (*DevopsClient, error) {
+	var d DevopsClient
+
+	jenkins := gojenkins.CreateJenkins(nil, options.Host, options.MaxConnections, options.Username, options.Password)
+	jenkins, err := jenkins.Init()
+	if err != nil {
+		klog.Errorf("failed to connecto to jenkins role, %+v", err)
+		return nil, err
+	}
+
+	d.jenkinsClient = jenkins
+
+	err = d.initializeJenkins()
+	if err != nil {
+		klog.Error(err)
+		return nil, err
+	}
+
+	return &d, nil
+}
+
+func NewDevopsClientOrDie(options *DevopsOptions) *DevopsClient {
+	jenkins := gojenkins.CreateJenkins(nil, options.Host, options.MaxConnections, options.Username, options.Password)
+	jenkins, err := jenkins.Init()
+	if err != nil {
+		klog.Errorf("failed to connecto to jenkins role, %+v", err)
+		panic(err)
+	}
+
+	d := &DevopsClient{
+		jenkinsClient: jenkins,
+	}
+
+	err = d.initializeJenkins()
+	if err != nil {
+		klog.Error(err)
+		panic(err)
+	}
+
+	return d
+}
+
+func (c *DevopsClient) Jenkins() *gojenkins.Jenkins {
+	return c.jenkinsClient
+}
+
+var mutex = sync.Mutex{}
+
+func (c *DevopsClient) initializeJenkins() error {
+	mutex.Lock()
+	defer mutex.Unlock()
+
+	if c.jenkinsClient == nil {
+		return fmt.Errorf("jenkins intialization failed")
+	}
+
+	globalRole, err := c.jenkinsClient.GetGlobalRole(JenkinsAllUserRoleName)
+	if err != nil {
+		klog.Error(err)
+		return err
+	}
+
+	// Jenkins uninitialized, create global role
+	if globalRole == nil {
+		_, err := c.jenkinsClient.AddGlobalRole(JenkinsAllUserRoleName, gojenkins.GlobalPermissionIds{GlobalRead: true}, true)
+		if err != nil {
+			klog.Error(err)
+			return err
+		}
+	}
+
+	_, err = c.jenkinsClient.AddProjectRole(JenkinsAllUserRoleName, "\\n\\s*\\r", gojenkins.ProjectPermissionIds{SCMTag: true}, true)
+	if err != nil {
+		klog.Error(err)
+		return err
+	}
+
+	return nil
+}