How to refer previous task and stop the build in azure devops if there is no new data to publish an artifact - powershell

Question

Getsolution.exe will give New data available or no new data available, if new data available then next jobs should be executed else nothing should be executed. How should i do it? (i am working on classic editor)
example: i have set of tasks, consider 4 tasks:
task-1: builds the solution
task-2: runs the Getstatus.exe which get the status of data available or no data available
task-3: i should be able to use the above task and make a condition/use some api query and to proceed to publish an artifact if data is available if not cleanly break out of the task and stop the build. it Shouldn't proceed to publish artifact or move to the next available task
task-4:publish artifact

Answer 1

First what you need is to set a variable in your task where you run Getstatus.exe:
and then set condition in next tasks:
If you set doThing to different valu than Yes you will get this:

Answer 2

How to refer previous task and stop the build in azure devops if there is no new data to publish an artifact
Since we need to execute different task based on the different results of Getstatus.exe running, we need set the condition based on the result of Getstatus.exe running.
To resolve this, just like the Krzysztof Madej said, we could set variable(s) based on the return value of Getstatus.exe in the inline powershell task:
$dataAvailable= $(The value of the `Getstatus.exe`）
if ($dataAvailable -eq "True")
{
Write-Host ("##vso[task.setvariable variable=Status]Yes")
}
elseif ($dataAvailable -eq "False")
{
Write-Host ("##vso[task.setvariable variable=Status]No")
}
Then set the different condition for next task:
You could check the document Specify conditions for some more details.