convertEOL.ps1

# EOL converter
function convertEOL
{
     <#
     .SYNOPSIS
     Function to convert Windows EOL to Unix EOL format.

     .DESCRIPTION
     Takes EOL format and file as input and converts the entire file to provided EOL format.

     .NOTES
     Change the line endings of a text file to: Windows (CR/LF), Unix (LF) or Mac (CR)
     Requires PowerShell 3.0 or greater

     .EXAMPLE
     convertEOL  -lineEnding <mac|unix|win> -file <full path to file>

     convertEOL  -lineEnding unix -file "$scriptPath\$fileBase\$fileBase.ansibleInventory.txt"

     .LINK
     Source https://ss64.com/ps/syntax-set-eol.html

     #>

     [CmdletBinding()]
     Param(
       [Parameter(Mandatory=$True,Position=1)]
         [ValidateSet("mac","unix","win")]
         [string]$lineEnding,
       [Parameter(Mandatory=$True)]
         [string]$file
     )

     # Convert the friendly name into a PowerShell EOL character
     Switch ($lineEnding) {
       "mac"  { $eol="`r" }
       "unix" { $eol="`n" }
       "win"  { $eol="`r`n" }
     }

     # Replace CR+LF with LF
     $text = [System.IO.File]::ReadAllText($file) -replace "`r`n", "`n"
     [System.IO.File]::WriteAllText($file, $text)

     # Replace CR with LF
     $text = [System.IO.File]::ReadAllText($file) -replace "`r", "`n"
     [System.IO.File]::WriteAllText($file, $text)

     #  At this point all line-endings should be LF.

     # Replace LF with intended EOL char
     if ($eol -ne "`n") {
       $text = [System.IO.File]::ReadAllText($file) -replace "`n", $eol
       [System.IO.File]::WriteAllText($file, $text)
     }

     return "True"
}