Does Azure DevOps remove quotation marks when setting a pipeline variable via a script?

Question

I have to set an array for an ARM Template within my Azure DevOps pipeline. I set my variable like this:

$foo = '["' + 'bar' + '"]'
Write-Host $foo
#######Assign Variables with Correct Value in pipeline
Write-Host "##vso[task.setvariable variable=fooVariableInPipeline]$foo"

The $foo value is fine which would be ["bar"] as expected. But when I inspect the value in the next tasks after setting the variable, it would remove the quotation marks and show the value as [bar].

This is rather strange and I am wondering if its me or is it a bug? Any workarounds?

For the time being, I have updated my file directly using powershell code.

Answer 1

Does Azure DevOps remove quotation marks when setting a pipeline variable via a script?

This issue does not come from azure devops, but depends on the syntax of your next task.

If I use the command line task to output that variable, it works fine:

echo $(fooVariableInPipeline)

The output:

However, if we use the powershell task to output it, it will remove quotation marks:

Write-Host "fooVariableInPipeline is $(fooVariableInPipeline)"

The output:

To resolve this issue, we need to surround the variable with single quotes to make it a literal string, like:

$Testfoo= '$(fooVariableInPipeline)'

Write-Host "Testfoo is $Testfoo"

Now, it works fine:

Hope this helps.