nvm-version.ps1

$origNvm = Get-Command nvm -CommandType Application -ErrorAction SilentlyContinue
if ($origNvm) { Set-Alias nvm_external $origNvm.Path }

function nvmFunc {
    param(
        [string]$Argument,
        [string]$Version = ""
    )

    function Get-NvmVersion {
        if (Test-Path ".nvmrc") {
            return (Get-Content .nvmrc).Trim()
        }
        elseif (Test-Path ".node-version") {
            return (Get-Content .node-version).Trim()
        }
        else {
            Write-Warning "No .nvmrc or .node-version file found"
            return $null
        }
    }

    if ($Argument -eq "install" -and $Version -eq "") {
        $ver = Get-NvmVersion
        if ($ver) { & nvm install $ver }
    }
    elseif ($Argument -eq "use") {
        if ($Version -eq "") {
            $ver = Get-NvmVersion
        }
        else {
            $ver = $Version
        }
        if ($ver) { & cmd /c nvm use $ver }
    }
    else {
        & nvm_external $Argument
    }
}

Set-alias nvm nvmFunc