Issue with setting variable in Azure Devops pipeline

Question

I have an Azure DevOps online and want to set Buildnumber as ImageTag variable, to use it later as Image tag for docker image. To do so, I created empty variable ImageTag on the variables tab:

And add PS script:

Write-Host "Buildnumber is $(Build.BuildNumber)"
$ImageTagVar = "$(Build.BuildNumber)"

Write-Host "##vso[task.setvariable variable=ImageTag;]$ImageTagVar"

Write-Host "Set environment variable to $env:ImageTag"
Write-Host "Set environment variable1 to $ImageTag"

The problem is that content from $(Build.BuildNumber) does not pass to variable ImageTag:

Can anyone hint me, what am I doing wrong in Azure DevOps?

Shamrai Aleksander · Accepted Answer · 2020-03-03 16:43:21Z

1

You will see it on next steps of your build pipeline:

Steps in build definition:

Step 1

Step 2

Build results

Step 1

Step 2

answered Mar 3, 2020 at 16:43

Shamrai Aleksander

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Levi Lu-MSFT · Accepted Answer · 2020-03-04 06:49:02Z

1

If you just want to tag the docker image with buildNumber, you do not need to define the ImageTag variable. You can directly use $(Build.BuildNumber) in the docker build task.

If you have to define the ImageTag variable, you can directly assign $(Build.BuildNumber) to it.

answered Mar 4, 2020 at 6:49

Levi Lu-MSFT

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