Octopus script template for slack notifiation with release notes and deployment link

SlackNotificationOctopusDeploy.ps1

function Slack-Rich-Notification ($notification)
{
    $payload = @{
        channel = $OctopusParameters['Channel']
        username = $OctopusParameters['Username'];
        icon_url = $OctopusParameters['IconUrl'];
        attachments = @(
            @{
            fallback = $notification["fallback"];
            color = $notification["color"];
            fields = @(
                @{
                title = $notification["title"];
                value = $notification["value"];
                });
            };
        );
    }

    Invoke-RestMethod -Method POST -Body ($payload | ConvertTo-Json -Depth 4) -Uri $OctopusParameters['HookUrl']  -ContentType 'application/json'
}

$IncludeMachineName = [boolean]::Parse($OctopusParameters['IncludeMachineName']);
if ($IncludeMachineName) {
    $MachineName = $OctopusParameters['Octopus.Machine.Name'];
    $FormattedMachineName = "($MachineName)";
}

$OctopusReleaseNotes = $OctopusParameters['Octopus.Release.Notes'];
$OctopusRelativeDeploymentLink = $OctopusParameters['Octopus.Web.DeploymentLink'];
$FullDeployUrl = "https://your-octopus-url.com$OctopusRelativeDeploymentLink"
    
if ($OctopusParameters['Octopus.Deployment.Error'] -eq $null){
    Slack-Rich-Notification @{
        title = "Success";
        value = "Deployed $OctopusProjectName release $OctopusReleaseNumber to $OctopusEnvironmentName $FormattedMachineName. $OctopusReleaseNotes. <$FullDeployUrl|See deploy>";
        fallback = "Deployed $OctopusProjectName release $OctopusReleaseNumber to $OctopusEnvironmentName successfully. $OctopusReleaseNotes. <$FullDeployUrl|See deploy>";
        color = "good";
    };
} else {
    Slack-Rich-Notification @{
        title = "Failed";
        value = "Deployed $OctopusProjectName release $OctopusReleaseNumber to $OctopusEnvironmentName $FormattedMachineName. $OctopusReleaseNotes. <$FullDeployUrl|See deploy>";
        fallback = "Failed to deploy $OctopusProjectName release $OctopusReleaseNumber to $OctopusEnvironmentName. $OctopusReleaseNotes. <$FullDeployUrl|See deploy>";
        color = "danger";
    };
}