DevOps - Extract version number

The following PowerShell script can be used as task to extract the version number (file version) from an assembly like a exe or a dll:

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$searchPath = "$(Build.ArtifactStagingDirectory)"
$searchExeName = "$(Solution).exe"

Get-ChildItem -Path $searchPath -Filter $searchExeName -Recurse |
    ForEach-Object {
        try {
            $_ | Add-Member NoteProperty FileVersion ($_.VersionInfo.FileVersion)
        } catch {}
        $_
    } |
    Select-Object -ExpandProperty FileVersion -OutVariable BuildVersionNumber

Write-Host "Extracted FileVersion Number: $($BuildVersionNumber)"

$BuildVersionNumber | out-file -filepath "$(Build.ArtifactStagingDirectory)/version.marker"
Write-Host "Stored the versionNumber in: $(Build.ArtifactStagingDirectory)/version.marker"

I used this script in some of my DevOps CI/CD pipelines to check on this, or to create a folder with it. The $(Build.ArtifactStagingDirectory) is a variable in the DevOps pipe, as well as the $(Solution). The last two lines are to pipe the $BuildVersionNumber to a file version.marker wich gets uploaded as pipeline artifact to be available in the separated release pipe, too.

A alternative to work with the version number is to write it to a pipeline variable:

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Write-Host "##vso[task.setvariable variable=BuildVersionNumber]$BuildVersionNumber"

ci-variable

Note: This pipeline variable named $BuildVersionNumber is only visible in the same pipeline Job. Other jobs can’t read the variable value set in another prior executed job within the same release pipe.