Question:
I am trying to remove some verbosity from a choco install command within AppVeyor. Here is what I been trying (as suggested here):
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if (Test-Path "C:/ProgramData/chocolatey/bin/swig.exe") { echo "using swig from cache" } else { choco install swig > NUL } |
However it fails with:
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Redirection to 'NUL' failed: FileStream will not open Win32 devices such as disk partitions and tape drives. Avoid use of "\\.\" in the path. At line:4 char:5 + choco install swig > NUL + ~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo : InvalidOperation: (:) [], RuntimeException + FullyQualifiedErrorId : RedirectionFailed Command executed with exception: Redirection to 'NUL' failed: FileStream will not open Win32 devices such as disk partitions and tape drives. Avoid use of "\\.\" in the path. |
So my question is there a way to suppress the verbosity of a choco install command within PowerShell on AppVeyor?
Answer:
nul is batch syntax. In PowerShell you can use $null instead, as Mathias R. Jessen pointed out in his comment:
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choco install swig > $null |
Other options are piping into the
Out-Null cmdlet, collecting the output in a variable, or casting it to void:|
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choco install swig | Out-Null $dummy = choco install swig [void](choco install swig) |