Delete all deploments for a Project-Environment

DeleteDeployments.ps1

$apiKey = "Your API Key"
$OctopusURL = "Your Octopus URL"
 
$Header =  @{ "X-Octopus-ApiKey" = $apiKey }
 
$ProjectName = "Your project name"
$EnvironmentName = "Your environment name"
 
#Getting Environment and Project By Name
$Project = Invoke-WebRequest -Uri "$OctopusURL/api/projects/$ProjectName" -Headers $Header| ConvertFrom-Json
 
$Environment = Invoke-WebRequest -Uri "$OctopusURL/api/Environments/all" -Headers $Header| ConvertFrom-Json
 
$Environment = $Environment | ?{$_.name -eq $EnvironmentName}

#Getting all deployents for Project-Environment combination
$deployments = Invoke-WebRequest -Uri "$OctopusURL/api/deployments?projects=$($Project.id)&environments=$($environment.id)" -Headers $Header | ConvertFrom-Json 


#Deleting all the deployments one by one
foreach ($deployment in $deployments.Items){

    Invoke-WebRequest -uri ("$env:OctopusURL" + $deployment.Links.Self) -Headers $Header -Method Delete

}