Functions/Get-PathProvider.ps1

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# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

function Get-PathProvider
{
    <#
    .SYNOPSIS
    Returns a path's PowerShell provider.
 
    .DESCRIPTION
    When you want to do something with a path that depends on its provider, use this function. The path doesn't have to exist.
 
    If you pass in a relative path, it is resolved relative to the current directory. So make sure you're in the right place.
 
    .OUTPUTS
    System.Management.Automation.ProviderInfo.
 
    .EXAMPLE
    Get-PathProvider -Path 'C:\Windows'
 
    Demonstrates how to get the path provider for an NTFS path.
    #>

    [CmdletBinding()]
    param(
        [Parameter(Mandatory=$true)]
        [string]
        # The path whose provider to get.
        $Path
    )

    Set-StrictMode -Version 'Latest'

    Use-CallerPreference -Cmdlet $PSCmdlet -Session $ExecutionContext.SessionState

    $pathQualifier = Split-Path -Qualifier $Path -ErrorAction SilentlyContinue
    if( -not $pathQualifier )
    {
        $Path = Join-Path -Path (Get-Location) -ChildPath $Path
        $pathQualifier = Split-Path -Qualifier $Path -ErrorAction SilentlyContinue
        if( -not $pathQualifier )
        {
            Write-Error "Qualifier for path '$Path' not found."
            return
        }
    }

    $pathQualifier = $pathQualifier.Trim(':')
    $drive = Get-PSDrive -Name $pathQualifier -ErrorAction Ignore
    if( -not $drive )
    {
        $drive = Get-PSDrive -PSProvider $pathQualifier -ErrorAction Ignore
    }

    if( -not $drive )
    {
        Write-Error -Message ('Unable to determine the provider for path {0}.' -f $Path)
        return
    }

    $drive  |
        Select-Object -First 1 |
        Select-Object -ExpandProperty 'Provider'

}