The reason that I chose Select-String instead of -split is because : In fact Powershell -split operator can also take regex pattern, and is as powerful as Select-String can do in terms of searching pattern. The demo reads in real-time a test file and use Select-ColorString to highlight the keyword warn That’s all, let’s see a demo on Select-ColorString. If ( $Token -like "* $Word *" ) Write-Host $line. When I checked the code source of Trace-Word, I found the cmdlet logic is:įirstly reads the input content line by line: Indeed, I was deeply impressed when I read his post, the color in Powershell string search results had been one of my most expected Powershell functionalities. Let me show you a screenshot of his Trace-Word to let you have an idea about what it can do: Trace-Wordįirst of all, I must mention another powershell cmdlet Trace-Word that I read on Prateek Singh’s blog.
#Powershell grep example how to
But from my personal point of view, it’s a little bit pity that Select-String doesn’t highlight the matching patterns, so I will show you in this post how to make it possible (more or less) with Select-ColorString. It’s very much like the famous command-line grep in Unix. Select-String in Powershell is a very powerful cmdlet to search a string or a pattern in input or files.
The original post before the Emphasis has been introduced in Powershell 7: Powershell 7 Select-String default highlighting demo: I don’t know if you have the same feeling as the mine, this feature is killing, it will help me for many other things :)
#Powershell grep example update
Update : I just found a workaround here, by specifying $PSDefaultParameterValues = $true in the Profile.ps1. I think it would be nice to have an inverse switch -NoAllMatches just like -NoEmphasis, and let -AllMatches to be $true by default. So I highly recommend everyone to switch to Powershell 7 ( RC is supported by Microsoft), it has also many other new powerful features.īTW, in Powershell 7, Select-String -AllMatches is set as $false by default. To disable the emphasis, use the -NoEmphasis switch. The emphasis uses negative colors based on your PowerShell background and text colors. It uses similar way (index, length) to find and highlight the matches. Update : It’s very exciting to see that since Powershell 7, the Select-String has highlighting (internal name: emphasis) by default. Update Powershell 7 Select-String default highlighting Update on new switch -MultiColorsForSimplePattern.Update Powershell 7 Select-String default highlighting.Select-ColorString : A Unix’s grep-like Powershell Cmdlet Based On Select-String With Color
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