RequireJS script error when requiring "ReleaseaManagement/Core/RestClient" on TFS 2015 and 2017 - tfs-2015

Question

I'm creating an tfs hub Extension (2015/2017) and need to read the projects' release defs and create releases also. I know, I could make direkt Rest Calls instead of using the methods of the rest clients. But they seem more comfortable to me.
When I try to get the Restmanagement RestClient, I get:
Script error for: ReleaseManagement/Core/RestClient
http://requirejs.org/docs/errors.html#scripterror
In both TFS.2015.2 and TFS.2017
Doesn't the client yet exist on-premise?

Answer 1

You can refer to this article for how to use Rest API in extension to read a release definition: Writing a ReleaseManagement extension for cloning an existing release definition.
The code to read a release definition:
VSS.require(["VSS/Controls", "VSS/Service", "ReleaseManagement/Core/RestClient"],
var rmClient = VSS_Service.getCollectionClient(RM_WebApi.ReleaseHttpClient);
rmClient.getReleaseDefinition(vsoContext.project.id,sourceItemContext.definition.id);
And if you are using typescript, you need to include "ms.vss-releaseManagement-web.release-service-data-external" in the contribution like following:
"contributions": [
{
"id": "release-status",
"type": "ms.vss-web.hub",
"includes": [ "ms.vss-releaseManagement-web.release-service-data-external" ],
"description": "A hub to show release status",
"targets": [
"ms.vss-work-web.work-hub-group"
],
"properties": {
"name": "hello",
"order": 99,
"uri": "app.html"
}
}
]