functions/New-DbaDirectory.ps1

function New-DbaDirectory {
    <#
    .SYNOPSIS
        Creates new path as specified by the path variable
 
    .DESCRIPTION
        Uses master.dbo.xp_create_subdir to create the path
        Returns $true if the path can be created, $false otherwise
 
    .PARAMETER SqlInstance
        The SQL Server you want to run the test on.
 
    .PARAMETER Path
        The Path to tests. Can be a file or directory.
 
    .PARAMETER SqlCredential
        Login to the target instance using alternative credentials. Windows and SQL Authentication supported. Accepts credential objects (Get-Credential)
 
    .PARAMETER EnableException
        By default, when something goes wrong we try to catch it, interpret it and give you a friendly warning message.
        This avoids overwhelming you with "sea of red" exceptions, but is inconvenient because it basically disables advanced scripting.
        Using this switch turns this "nice by default" feature off and enables you to catch exceptions with your own try/catch.
 
    .NOTES
        Tags: Path, Directory, Folder
        Author: Stuart Moore
 
        Website: https://dbatools.io
        Copyright: (c) 2018 by dbatools, licensed under MIT
        License: MIT https://opensource.org/licenses/MIT
 
        Requires: Admin access to server (not SQL Services),
        Remoting must be enabled and accessible if $SqlInstance is not local
 
    .LINK
        https://dbatools.io/New-DbaDirectory
 
    .EXAMPLE
        PS C:\> New-DbaDirectory -SqlInstance sqlcluster -Path L:\MSAS12.MSSQLSERVER\OLAP
 
        If the SQL Server instance sqlcluster can create the path L:\MSAS12.MSSQLSERVER\OLAP it will do and return $true, if not it will return $false.
 
    .EXAMPLE
        PS C:\> $credential = Get-Credential
        PS C:\> New-DbaDirectory -SqlInstance sqlcluster -SqlCredential $credential -Path L:\MSAS12.MSSQLSERVER\OLAP
 
        If the SQL Server instance sqlcluster can create the path L:\MSAS12.MSSQLSERVER\OLAP it will do and return $true, if not it will return $false. Uses a SqlCredential to connect
 
#>

    [CmdletBinding()]
    param (
        [Parameter(Mandatory)]
        [Alias("ServerInstance", "SqlServer")]
        [DbaInstanceParameter[]]$SqlInstance,
        [Parameter(Mandatory)]
        [string]$Path,
        [PSCredential]$SqlCredential,
        [switch]$EnableException
    )

    Test-DbaDeprecation -DeprecatedOn "1.0.0" -EnableException:$false -Alias New-DbaSqlDirectory

    foreach ($instance in $SqlInstance) {
        try {
            $server = Connect-SqlInstance -SqlInstance $instance -SqlCredential $sqlcredential
        }
        catch {
            Stop-Function -Message "Failure" -Category ConnectionError -ErrorRecord $_ -Target $instance -Continue
        }

        $Path = $Path.Replace("'", "''")

        $exists = Test-DbaPath -SqlInstance $sqlinstance -SqlCredential $SqlCredential -Path $Path

        if ($exists) {
            Stop-Function -Message "$Path already exists" -Target $server -Continue
        }

        $sql = "EXEC master.dbo.xp_create_subdir'$path'"
        Write-Message -Level Debug -Message $sql

        try {
            $query = $server.Query($sql)
            $Created = $true
        }
        catch {
            $Created = $false
            Stop-Function -Message "Failure" -ErrorRecord $_
        }

        [pscustomobject]@{
            Server  = $SqlInstance
            Path    = $Path
            Created = $Created
        }
    }
}