In MsBuild, how do I run something PowerShell and have all errors reported [duplicate]

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Closed 7 years ago.

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Any good PowerShell MSBuild tasks?

Powershell doesn't seem to have an easy way to trigger it with an arbitrary command and then bubble up parse and execution errors in a way that correctly interoperates with callers that are not PowerShell - e.g., cmd.exe, TeamCity etc.

My question is simple. What's the best way for me with OOTB MSBuild v4 and PowerShell v3 (open to suggestions-wouldnt rule out a suitably production ready MSBuild Task, but it would need to be a bit stronger than suggesting "it's easy - taking the PowerShell Task Factory sample and tweak it and/or becoming it's maintainer/parent") to run a command (either a small script segment, or (most commonly) an invocation of a .ps1 script.

I'm thinking it should be something normal like:

<Exec 
  IgnoreStandardErrorWarningFormat="true"
  Command="PowerShell &quot;$(ThingToDo)&quot;" />

---

That sadly doesn't work:-

1. if ThingToDo fails to parse, it fails silently
2. if ThingToDo is a script invocation that doesn't exist, it fails
3. if you want to propagate an ERRORLEVEL based .cmd result, it gets hairy
4. if you want to embed " quotes in the ThingToDo, it won't work

So, what is the bullet proof way of running PowerShell from MSBuild supposed to be? Is there something I can PsGet to make everything OK?

Answer 1

You can use the following example:

<InvokeScript Condition="..."
              PowerShellProperties="..."
              ScriptFile="[PATH TO PS1 FILE]"
              Function="[FUNCTION TO CALL IN PS1]"
              Parameters="..."
              RequiredOutputParams="...">
  <!-- You can catch the output in an Item -->
  <Output TaskParameter="OutputResults"
          ItemName="Output" />
</InvokeScript>

This can be used in MSBuild.

Answer 2

Weeeeelll, you could use something long winded like this until you find a better way:-

<PropertyGroup>
  <__PsInvokeCommand>powershell "Invoke-Command</__PsInvokeCommand>
  <__BlockBegin>-ScriptBlock { $errorActionPreference='Stop';</__BlockBegin>
  <__BlockEnd>; exit $LASTEXITCODE }</__BlockEnd>
  <_PsCmdStart>$(__PsInvokeCommand) $(__BlockBegin)</PsCmdStart>
  <_PsCmdEnd>$(__BlockEnd)"</PsCmdEnd>
</PropertyGroup>

And then 'all' you need to do is:

<Exec 
  IgnoreStandardErrorWarningFormat="true"
  Command="$(_PsCmdStart)$(ThingToDo)$(_PsCmdEnd)" />

The single redeeming feature of this (other than trapping all error types I could think of), is that it works OOTB with any PowerShell version and any MSBuild version.

I'll get my coat.