CLI: Improved - Hackdot

Re:CLI: Improved by flukus on Friday August 31, 2018 @02:57AM (#17883491)

A while ago I was trying to copy a bunch of files and couldn't believe the powershell abominations I found: https://techblog.dorogin.com/powershell-how-to-recursively-c...

    $exclude = @("main.js")
    $excludeMatch = @("app")
    Get-ChildItem -Path $from -Recurse -Exclude $exclude | 
              where { $excludeMatch -eq $null -or     $_.FullName.Replace($from, "") -notmatch $excludeMatch } |
              Copy-Item -Destination {
                if ($_.PSIsContainer) {
                  Join-Path $to         $_.Parent.FullName.Substring($from.length)
                } else {
                  Join-Path $to     $_.FullName.Substring($from.length)
                }
               } -Force -Exclude $exclude

All to do:

    find sourceFolder \! -path */app/* | xargs cp -t destFolder

Screwed up the formatting a bit in the first example. I'm not positive the second works perfectly but I know which one I'd rather debug.

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Re:CLI: Improved by h1d on Friday August 31, 2018 @03:45AM (#17883707)

  rsync -a --exclude=app/ --exclude=main.js sourceFolder/ destFolder/

Thank you, thank you unix tools.

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Re:CLI: Improved by AnIdiotOnTheNet on Friday August 31, 2018 @08:12AM (#17884832)

First of all, the two examples you present do not do the same thing. The Powershell version preserves paths and excludes more patterns than your find | xargs example. The right way to do this is to just use robocopy.

This example has targeted a very specific deficiency in the way Copy-Item works. I could similarly point out that the following Powershell command would be much more difficult in standard unix tooling:

  Get-WMIObject -Computer $remote -Class Win32_Product | Where-Object { $_.name -like "7-Zip*" } | select Version

Which gets the version(s) of 7-Zip installed on a remote machine.

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