Pass a value from powershell to TFS Build Workflow

Question

I have a build which kicks off a PowerShell script. What it does is gather code coverage metrics and then stores that info in a database. I'd like to pass a value out of that script and back into the build workflow so I can pass or fail the build based on that value.

Any ideas on how I could accomplish that?

jessehouwing · Accepted Answer · 2013-12-20 17:50:24Z

3

Easiest way is to have PowerShell throw an exception. That will also cause Powershell to return a non-0 exit code. In your InvokeProcess you can either handle the Error stream or have the Result parameter assigned to a variable on your build workflow, then follow that with an if block to pass or fail the build.

Or you can return the coverage outcome using the exit function, it will be assigned to the Result property of the InvokeProcess Activity.

exit 12345;

edited Dec 20, 2013 at 17:50

answered Dec 20, 2013 at 16:30

jessehouwing

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4 Comments

Steve L. Over a year ago

Would it be possible to create custom error code, this way I can isolate it from real errors? Hope that made sense.

Steve L. Over a year ago

How about this option? Pass in the coverage threshold value to PowerShell, the coverage process would run, and if the passed in value was less than the result, I could set the build status from within PowerShell.

jessehouwing Over a year ago

Sure, that's possible as well, call the exit function from powershell: blogs.msdn.com/b/powershell/archive/2006/10/14/…

Steve L. Over a year ago

This is what I came up with on the PowerShell side:

function CoverageResult() {     IF ($CoveragePercent -lt $FailurePercent)      {         Write-Output "Exit Code 10000: $(Get-Date –f $timeStampFormat) - Code Coverage was $CoveragePercent percent, which is below the defined threshold."                  $Host.SetShouldExit(10000)     }     ELSE      {         Write-Output "$(Get-Date –f $timeStampFormat) - Code Coverage was $CoveragePercent percent, which is above the defined threshold.     } }

Works great! :)

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