Support migration of just Services (#40)

Readme.md

@@ -52,6 +52,11 @@ To migrate an application and all the workflows & pipelines
 harness-upgrade app --all
 ```
 
+To migrate services from an app
+```shell
+harness-upgrade service
+```
+
 To migrate workflows
 ```shell
 harness-upgrade workflows
@@ -118,6 +123,12 @@ HARNESS_MIGRATOR_AUTH=apiKey harness-upgrade --project PROJECT --org ORG --accou
 HARNESS_MIGRATOR_AUTH=apiKey harness-upgrade --app APP_ID --project PROJECT --org ORG --account ACCOUNT_ID --secret-scope SCOPE --connector-scope SCOPE --template-scope SCOPE --env ENV app
 ```
 
+### To migrate services
+
+```shell
+HARNESS_MIGRATOR_AUTH=apiKey harness-upgrade --app APP_ID --project PROJECT --org ORG --account ACCOUNT_ID --secret-scope SCOPE --connector-scope SCOPE --template-scope SCOPE --env ENV service
+```
+
 ### To migrate workflows
 
 ```shell

main.go

@@ -250,6 +250,13 @@ func main() {
 					},
 				},
 			},
+			{
+				Name:  "service",
+				Usage: "Import services into an existing project from an application",
+				Action: func(context *cli.Context) error {
+					return cliWrapper(migrateServices, context)
+				},
+			},
 			{
 				Name:  "workflows",
 				Usage: "Import workflows as stage or pipeline templates by providing the `appId` & `workflowIds`",

services.go

@@ -0,0 +1,33 @@
+package main
+
+import (
+	log "github.com/sirupsen/logrus"
+	"github.com/urfave/cli/v2"
+)
+
+func migrateServices(*cli.Context) error {
+	promptConfirm := PromptDefaultInputs()
+	if len(migrationReq.AppId) == 0 {
+		promptConfirm = true
+		migrationReq.AppId = TextInput("Please provide the application ID -")
+	}
+
+	promptConfirm = PromptOrgAndProject([]string{Project}) || promptConfirm
+
+	logMigrationDetails()
+
+	if promptConfirm {
+		confirm := ConfirmInput("Do you want to proceed?")
+		if !confirm {
+			log.Fatal("Aborting...")
+		}
+	}
+
+	log.Info("Importing the services....")
+	CreateEntities(getReqBody(Service, Filter{
+		AppId: migrationReq.AppId,
+	}))
+	log.Info("Imported the services.")
+
+	return nil
+}