Azure Devops Pipeline Build Parameters - azure

Question

The code below is an API call that will run an azure pipeline but the only problem I am having is I am unable to run it on custom branches and I have tried az commands but with az commands, you can't pass though parameters. My goal is basically I have a pipeline A and I want to run Pipeline B which isn't mind so I can't edit it but Pipeline B takes in a parameter called Tag and I want to pass that though from Pineline A but struggling to do so.
$token = -join("$Username", ":", "$PAT")
$headers = #{
Authorization = "Basic "+ [System.Convert]::ToBase64String([System.Text.Encoding]::ASCII.GetBytes($token))
'Content-Type' = "application/json"
}
$uri = "https://dev.azure.com/{$Company}/{$Team}/_apis/pipelines/{$ProjectID}/runs/?api-version=6.0-preview.1"
$pipelineBody=#{
resources=#{
repositories=#{
self=#{
ref="$Branch"
}
}
}
templateParameters=#{
Tag="$Tag"
}
} | ConvertTo-Json
$result = Invoke-WebRequest -Uri $uri `
-Headers $headers `
-Body "$pipelineBody" `
-Method Post `
#-SkipCertificateCheck `
#-SkipHttpErrorCheck `
#-ErrorAction Stop
if($result.StatusCode -ne "200")
{
throw $result
}
return ($result.Content | ConvertFrom-Json).url

Answer 1

You can closely (not directly what you want) achieve this by following below steps:
Create single pipeline for Pipeline A (Stage 1) and Pipeline B(Stage 2).
Add a dependency of Pipeline A(Stage 1) on Pipeline B(Stage 2) that it runs only when Pipeline A succeeds.
Use Powershell script in Stage 1 to set a pipeline variable to a value you trying to set for Stage 2 - using out variable in Powershell script task of ADO.
Consume the pipeline variable set above in the desired step (of Pipeline B).