A PowerShell function to "clone" or "checkout" repositories from remote Version Control Systems

vcs.ps1

function co (
    [String]
    [Parameter(Mandatory = $true)]
    $url,
    [String]
    $path,
    [Switch]
    $git
) {
    if ( $url.StartsWith('git://') -Or $url.EndsWith('.git') ) {
        git clone --recurse-submodules $url $path
        return
    }

    if ( $url.StartsWith('svn://') ) {
        if ( $git ) {
            git svn clone $url $path
            return
        }

        svn checkout $url
        return
    }

    if ( $url.StartsWith('http://') -Or $url.StartsWith('https://') ) {
        $response = Invoke-WebRequest -Method Options -Body '<?xml version="1.0" encoding="utf-8"?><D:options xmlns:D="DAV:"><D:activity-collection-set></D:activity-collection-set></D:options>' -Uri $url
        if ( $response.Headers.ContainsKey('SVN-Youngest-Rev') ) {
            if ( $git ) {
                git svn clone $url $path
                return
            }

            svn checkout $url
            return
        }

        $response = Invoke-WebRequest -Method HEAD -Uri "${url}?cmd=heads"
        if ( $response.Headers.'Content-Type' -eq 'application/mercurial-0.1' ) {
            if ( $git ) {
                git clone "hg::${url}"
                return
            }

            hg clone $url $path
            return
        }
    }

    throw "Source Path Not Supported."
}