:four_leaf_clover: `Proposal`: refactor plugin install method

[steinliber]

What Would You Like to Add? Why Is This Needed?

We have many plugin install methods listed below currently

Install method	plugin
Helm	argocd, hashicorpvault, jenkins, kubeprometheus, openldap,tekton
Kubectl	argocdapp,devlake
Docker	gitlabcedocker
Github Client	githubactions, jiragithub, reposcaffolding, trellogithub
Trello Client	trello, trellogithub
GoClient	zentao

The install method's code is separate in a different package, which makes it difficult to manage and extend the install method, we can extract these methods' code into a standalone package, like plugininstaller?

Design

• put the Install method all in the same package like plugininstaller
• define installerOption func

// this func input operation params and output operation and error
 type InstallerlOperation func (operation Operation) (Operation, error)

• define plugin install step

func Create(options map[string]interface{}) (map[string]interface{}, error) {
	// 1. decode options
	var opts Options
        var retErr error
	if err := mapstructure.Decode(options, &opts); err != nil {
		return nil, err
	}
        // 2. define installOperator to install this plugin
	installers := []plugininstaller.InstallerOperation{
                // if func run normal, err is nil and these func will run by order
                // else interrupt execute and return err. just like kubernetes's admission controller logic
		plugininstaller.helm.ValidateBasic, 
		plugininstaller.kubeClient.CreateNameSpace,
		plugininstaller.helm.InstallOrUpdate,
	}

        // 3. run opt with installOperator list
       retErr = plugininstaller.Execute(opts, installers)

        // 4. get installed status
  	retMap := GetStaticState().ToStringInterfaceMap()
	log.Debugf("Return map: %v", retMap)

	return retMap, nil

[daniel-hutao]

Maybe a todo list is needed here so that we can know the progress of the refactoring. @steinliber

e.g.

• [x] task1
• [ ] task2

[steinliber]

The rest of the plugins not using installer

• [x] gitlabci
• [x] jenkins
• [x] jenkinspipelinekubernetes
• [x] trello
• [ ] trellogithub