Update release variable snapshot

$ErrorActionPreference = "Stop";

# Define working variables
$octopusURL = "https://youroctourl"
$octopusAPIKey = "API-YOURAPIKEY"
$header = @{ "X-Octopus-ApiKey" = $octopusAPIKey }
$projectName = "MyProject"
$releaseVersion = "1.0.0.0"
$channelName = "Default"
$spaceName = "default"

# Get space
$space = (Invoke-RestMethod -Method Get -Uri "$octopusURL/api/spaces/all" -Headers $header) | Where-Object {$_.Name -eq $spaceName}

# Get project
$project = (Invoke-RestMethod -Method Get -Uri "$octopusURL/api/$($space.Id)/projects/all" -Headers $header) | Where-Object {$_.Name -eq $projectName}

# Get channel
$channel = (Invoke-RestMethod -Method Get -Uri "$octopusURL/api/$($space.Id)/projects/$($project.Id)/channels" -Headers $header).Items | Where-Object {$_.Name -eq $channelName}

# Get release
$release = (Invoke-RestMethod -Method Get -Uri "$octopusURL/api/$($space.Id)/projects/$($project.Id)/releases" -Headers $header).Items | Where-Object {$_.Version -eq $releaseVersion -and $_.ChannelId -eq $channel.Id}

# Update the variable snapshot
Invoke-RestMethod -Method Post -Uri "$octopusURL/api/$($space.Id)/releases/$($release.Id)/snapshot-variables" -Headers $header

# Load octopus.client assembly
Add-Type -Path "path\to\Octopus.Client.dll"

# Octopus variables
$octopusURL = "https://youroctourl"
$octopusAPIKey = "API-YOURAPIKEY"
$spaceName = "default"
$projectName = "MyProject"
$channelName = "default"
$releaseVersion = "1.0.0.0"

$endpoint = New-Object Octopus.Client.OctopusServerEndpoint $octopusURL, $octopusAPIKey
$repository = New-Object Octopus.Client.OctopusRepository $endpoint
$client = New-Object Octopus.Client.OctopusClient $endpoint

try
{
    # Get space
    $space = $repository.Spaces.FindByName($spaceName)
    $repositoryForSpace = $client.ForSpace($space)

    # Get project
    $project = $repositoryForSpace.Projects.FindByName($projectName)

    # Get channel
    $channel = $repositoryForSpace.Channels.FindOne({param($c) $c.Name -eq $channelName -and $c.ProjectId -eq $project.Id})

    # Get the release
    $release = $repositoryForSpace.Releases.FindOne({param($r) $r.ChannelId -eq $channel.Id -and $r.ProjectId -eq $project.Id -and $r.Version -eq $releaseVersion})
    
    # Get new variable snapshot
    $repositoryForSpace.Releases.SnapshotVariables($release)
}
catch
{
    Write-Host $_.Exception.Message
}

// If using .net Core, be sure to add the NuGet package of System.Security.Permissions
#r "path\to\Octopus.Client.dll"

using Octopus.Client;
using Octopus.Client.Model;

var octopusURL = "https://youroctourl";
var octopusAPIKey = "API-YOURAPIKEY";
var spaceName = "default";
string projectName = "MyProject";
string channelName = "Default";
string releaseVersion = "1.0.0.0";

// Create repository object
var endpoint = new OctopusServerEndpoint(octopusURL, octopusAPIKey);
var repository = new OctopusRepository(endpoint);
var client = new OctopusClient(endpoint);

try
{
    // Get space
    var space = repository.Spaces.FindByName(spaceName);
    var repositoryForSpace = client.ForSpace(space);

    // Get project
    var project = repositoryForSpace.Projects.FindByName(projectName);

    // Get channel
    var channel = repositoryForSpace.Channels.FindOne(r => r.ProjectId == project.Id && r.Name == channelName);

    // Get release
    var release = repositoryForSpace.Releases.FindOne(r => r.ProjectId == project.Id && r.ChannelId == channel.Id && r.Version == releaseVersion);

    // Update variable snapshot
    repositoryForSpace.Releases.SnapshotVariables(release);
}
catch (Exception ex)
{
    Console.WriteLine(ex.Message);
    return;
}