Getting latest release (isCurrent?) for each Channel for a project

[chris_olver]

Hey,

We heavily use the c# Octopus.Client package to re-release deployments to servers, normally we calculate the latest release using:

var dashboard = Repository.Dashboards.GetDynamicDashboard(new string[] { project.Id }, new string[] { deployEnvo.Id });
var latestDeployment = deploymentInfo.Where(r => r.IsCurrent ).FirstOrDefault();

But we need to now expand this to the latest release per channel. From the forum a year or two ago it was recommended to use: Repository.Client.Get($"/api/progression/{project.Id}") but it only marks the one release for an environment across all channels as IsCurrent. What’s the best way to calculate the latest release for a channel or is there a better method to work this out?

-Chris

[Kenneth_Bates]

Hi Chris,

Thanks for getting in touch! This is a great question, and after some research I think a good sample script to get you at least part of the way there is the following. This uses the progression API as well like you’ve mentioned in a thread you came across (is this the same one?) to retrieve releases based on channel specified that can be promoted.

var project = repository.Projects.FindByName("MyProject");
var progressions = repository.Projects.GetProgression(project)
    .Releases
    .Where(r => r.Channel.Id == "Channels-1");
var canPromoteToEnv2 = progressions.Where(r => r.NextDeployments.Contains("Environments-2"));

You can reference the full context of the thread where I pulled this sample script from here.

https://help.octopusdeploy.com/discussions/questions/12092-using-octopusclient-library-to-determine-if-there-is-a-release-available-for-deployment-on-a-specific-channel-in-a-project#comment_42845147

I hope this helps. Let me know how you go or if you have any further questions moving forward.

Best regards,

Kenny

[chris_olver]

Hey Kenny,

Had a play with the code but I am not seeing isCurrent being populated for any other channels. The isCurrent is only populating for a different channel.

 var progressions = Repository.Projects.GetProgression(project).Releases.Where(r => r.Channel.Id == channel.Id && r.NextDeployments.Contains(deployEnvo.Id));

 var isCurrent = progressions.SelectMany(v => v.Deployments).SelectMany(a => a.Value).Where(v => v.IsCurrent);

Code used above.

Ta

-Chris