Convert xargs Bash command to PowerShell?

Question

I've got a simple Bash command to resize some images automatically on a low-traffic website using ImageMagick - I'd like to convert this to a PowerShell command so I don't have to install Cygwin on my webserver. Can anyone lend their PSh skills here?

ls | xargs -I {} rconvert "{}" -resize 128x128\> "{}"

zdan · Accepted Answer · 2009-04-27T20:45:45.270

34

Your best bet is to pipe the output of ls to the foreach-object commandlet like this (% is an alias for foreach-object):

ls | %{rconvert $_ -resize 128x128}

Edit: ls outputs a list of FileInfo or DirectoryInfo objects onto the pipeline. To filter out the DirectoryInfo objects, use the where-object filter (? is alias):

ls | ?{-not $_.PSIsContainer} | %{rconvert $_ -resize 128x128}

If you need to access the full path name in your command, use the FullName property of the FileInfo object ($_ by itself will be resolved to $_.Name which is just the filename):

ls | ?{-not $_.PSIsContainer} | %{rconvert $_.FullName -resize 128x128}

edited Apr 27 '09 at 20:45

answered Apr 27 '09 at 18:04

zdan

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I think you should change $_ to $_.FullName – BeWarned Apr 27 '09 at 18:18
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You're probably right, that's more robust, but the command is being run from the current working directory, so it should work. – zdan Apr 27 '09 at 18:24
You have an extra "{" in the second and third command that needs to be removed (before the "%"). – JasonMArcher Apr 27 '09 at 20:29
Unfortunately, this approach cannot offer parallelism. – Raúl Salinas-Monteagudo Jun 11 '19 at 08:56

Convert xargs Bash command to PowerShell?

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