PowerShell/Docs/replace-in-files.md

## The replace-in-files.ps1 PowerShell Script

This PowerShell script searches and replaces a pattern in the given files by the replacement.

## Parameters
```powershell
replace-in-files.ps1 [[-pattern] <String>] [[-replacement] <String>] [[-files] <String>] [<CommonParameters>]

-pattern <String>
    Specifies the pattern to look for
    
    Required?                    false
    Position?                    1
    Default value                
    Accept pipeline input?       false
    Accept wildcard characters?  false

-replacement <String>
    Specifies the replacement
    
    Required?                    false
    Position?                    2
    Default value                
    Accept pipeline input?       false
    Accept wildcard characters?  false

-files <String>
    Specifies the file to scan
    
    Required?                    false
    Position?                    3
    Default value                
    Accept pipeline input?       false
    Accept wildcard characters?  false

[<CommonParameters>]
    This script supports the common parameters: Verbose, Debug, ErrorAction, ErrorVariable, WarningAction, 
    WarningVariable, OutBuffer, PipelineVariable, and OutVariable.
```

## Example
```powershell
PS> ./replace-in-files NSA "No Such Agency" C:\Temp\*.txt

```

## Notes
Author: Markus Fleschutz | License: CC0

## Related Links
https://github.com/fleschutz/PowerShell

## Source Code
<#
.SYNOPSIS
	Search and replace a pattern in the given files by the replacement
.DESCRIPTION
	This PowerShell script searches and replaces a pattern in the given files by the replacement.
.PARAMETER pattern
	Specifies the pattern to look for
.PARAMETER replacement
	Specifies the replacement
.PARAMETER files
	Specifies the file to scan
.EXAMPLE
	PS> ./replace-in-files NSA "No Such Agency" C:\Temp\*.txt
.LINK
	https://github.com/fleschutz/PowerShell
.NOTES
	Author: Markus Fleschutz | License: CC0
#>

param([string]$pattern = "", [string]$replacement = "", [string]$files = "")

function ReplaceInFile { param([string]$FilePath, [string]$Pattern, [string]$Replacement)

    [System.IO.File]::WriteAllText($FilePath,
        ([System.IO.File]::ReadAllText($FilePath) -replace $Pattern, $Replacement)
    )
}

try {
	if ($pattern -eq "" ) { $pattern = read-host "Enter search pattern" }
	if ($replacement -eq "" ) { $replacement = read-host "Enter replacement" }
	if ($files -eq "" ) { $files = read-host "Enter files" }

	$StopWatch = [system.diagnostics.stopwatch]::startNew()

	$fileList = (get-childItem -path "$files" -attributes !Directory)
	foreach($file in $fileList) {
		ReplaceInFile $file $pattern $replacement
	}
	[int]$Elapsed = $StopWatch.Elapsed.TotalSeconds
	"OK, replaced '$pattern' by '$replacement' in $($fileList.Count) files in $Elapsed sec."
	exit 0 # success
} catch {
	"⚠️ Error in line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"
	exit 1
}

*Generated by convert-ps2md.ps1 using the comment-based help of replace-in-files.ps1*