Powershell command to create a .gitignore file from .gitignore.io

Get-GitIgnore.ps1

function Get-GitIgnore {
    [CmdletBinding()]
    param (
        [Parameter(Mandatory=$true)]
        [string[]]
        $Targets,
        [string]
        $OutputDirectory = "$PWD",
        [string]
        $Filename = ".gitignore",
        [switch]$NoClobber
    )

    foreach ($target in $Targets) {
        if ($target -notmatch "[a-zA-Z][a-zA-Z0-9\.]*") {
            Write-Error -ErrorAction Stop -Message "Incorrect target format, " + `
                  "must start with a letter, and use only letters, numbers and periods."
        }
    }
    
    
    $url = "https://www.gitignore.io/api/$($Targets -join `",`")"

    $gitIgnoreResponse = Invoke-WebRequest -Uri $url

    if ($gitIgnoreResponse.StatusCode -ne 200) {
            Write-Error -ErrorAction Stop -Message "gitignore.io call returned error"
    }

    $outputPath = Join-Path -Path $OutputDirectory -ChildPath $Filename
    $outputPath

    if ((Test-Path -Path $outputPath) -And ($NoClobber -eq $true)) {
        Write-Error -ErrorAction Stop -Message "File already exists and NoClobber was specified."
    }

    if ((Test-Path $OutputDirectory) -ne $true) {
        New-Item -ItemType Directory -Path $OutputDirectory
    }

    $content = $gitIgnoreResponse.Content
    $Utf8NoBomEncoding = New-Object System.Text.UTF8Encoding $False
    [System.IO.File]::WriteAllLines($outputPath, $content, $Utf8NoBomEncoding)                
    
    Write-Output "GitIgnore file created at $outputPath"    
    
}