A PowerShell function usedto search the text inside PowerShell scripts for a particular string

Search-PSScripts.ps1

Function Search-PSScripts{
<#
.SYNOPSIS
Use to search the text inside PowerShell scripts for a particular string

.PARAMETER SearchString
The string to search for inside the script file
    
.PARAMETER Path
The folder path to search for PowerShell files in. Default to userprofile if not specified.

.PARAMETER Recurse
Indicates that this function gets the items in the specified locations and in all child items of the locations.

.EXAMPLE 
Search-PSScripts -searchString "Get-Help" -recurse

Description
-----------
This command searches all of the script files in the user's profile path and its subdirectories.

.EXAMPLE 
Search-PSScripts -searchString "Invoke-WebRequest" -path 'C:\Scripts' -recurse

Description
-----------
This command searches all of the script files in the current directory and its subdirectories.

.EXAMPLE 
Search-PSScripts -searchString "Invoke-WebRequest" -path 'C:\Scripts' 

Description
-----------
This command searches only the script files in the current directory.


#>
    [cmdletbinding()]
    param(
        [Parameter(Mandatory=$true)]
        [string]$SearchString, 
	    [Parameter(Mandatory=$false)]
        [string]$Path = $env:USERPROFILE,
        [Parameter(Mandatory=$false)]
        [switch]$Recurse
    )

    $filter = "*.ps1","*.psm1"

    # Confirm path is valid
    if(!(Test-Path $Path)){
        throw "'$Path' is not a valid folder or is not accessible."
    }

    # Get the name of this script to exclude it
    $Invocation = (Get-Variable MyInvocation -Scope 1).Value;

    
    $progressParam = @{
        Activity = "Search for PowerShell Script in $Path"
        Status = "Depending on the number of scripts this may take some time"
        PercentComplete = 0
        id = 1
        }
    Write-Progress @progressParam
    
    # Get all files in the path
    if($Recurse){
        $fileList = Get-ChildItem $Path -Recurse -include $filter -Exclude $Invocation.MyCommand -File
    } else {
        $Path = (Join-Path $Path '*.*')
        $fileList = Get-ChildItem $Path -include $filter -Exclude $Invocation.MyCommand -File
    }

    [System.Collections.Generic.List[PSObject]] $results = @()
    $progress=1
    # Check each file for the string pattern
    Foreach($file in $fileList){
        $progressParam = @{
            Activity = "Search for '$SearchString' - $progress of $(@($fileList).count)"
            Status = "Found: $(@($results).count)"
            PercentComplete = $(($progress/$($fileList.count))*100)
            id = 1
            }
        Write-Progress @progressParam
        $progress++
        $found = Select-String -Path $file.fullname -pattern $SearchString 
        if($found){
            Write-Verbose ($found | Out-String)
            $results.Add(($file | Select-Object LastWriteTime, FullName))
        }
    }
    Write-Progress -Activity "Done" -Id 1 -Completed

    # Return found scripts sorted by last write time
    $results | sort LastWriteTime
}