mytrigger.ps1

################# Declare stage variables with triggering artifacts
$myhash = @{"ALPHA"="_myA"; "BETA"="_myB"; "GAMMA" = "_myC"; "DELTA" = "_myD"}

################## Declaration done

$trigalias = "$(RELEASE.TRIGGERINGARTIFACT.ALIAS)"

if ($trigalias -ne "") {
 $mystage = $myhash.Keys | ? { $myhash[$_] -eq $trigalias }
 $relid = "$(RELEASE.RELEASEID)"
 $headers = @{authorization="Bearer $env:SYSTEM_ACCESSTOKEN"}
 $contentType = "application/json"
 $uri = "https://vsrm.dev.azure.com/rajeevgupta0325/GlobantDevops/_apis/release/releases/"+$relid+"?api-version=5.1"
 $data = Invoke-RestMethod -Uri $uri -Method GET -Headers $headers -ContentType "application/json" 
 foreach ($myenv in $data.environments)
 {
   if ($myenv.name -eq "$mystage") {$mystageid = $myenv.id}
 }
 $mystageid
 $myuri = "https://vsrm.dev.azure.com/rajeevgupta0325/GlobantDevops/_apis/Release/releases/"+$relid+"/environments/"+$mystageid+"?api-version=5.1-preview.6"
 $myuri
 $mybody = "{`"status`":`"inProgress`",`"scheduledDeploymentTime`":null,`"comment`":`"`"}"
 $mydeploy = Invoke-RestMethod -Uri $myuri -Method PATCH -Headers $headers -body $mybody -ContentType "application/json"
 $mydeploy
 }