Functions/Get-POSHOriginSecret.ps1

function Get-POSHOriginSecret {
    <#
        .SYNOPSIS
            Returns a PowerShell credential object using a given resolver name and options.
        .DESCRIPTION
            Returns a PowerShell credential object using a given resolver name and options.
        .PARAMETER Resolver
            The name of the credential resolver to use
        .PARAMETER Options
            Hashtable of options that the resolver will use to translate into a credential object
        .EXAMPLE
            Read the configuration contained in vm_config.ps1 into a variable.
            
            resource 'POSHOrigin_vSphere:VM' 'VM01' @{
                defaults = '.\defaults.psd1'
                ###
                # Other options omitted for brevity
                ###
                vcenterCredentials = Get-POSHOriginSecret 'pscredential' @{
                    username = 'svcvcenter'
                    password = 'password123!'
                }
            }
    #>

    [cmdletbinding(HelpUri='https://github.com/devblackops/POSHOrigin/wiki/Get-POSHOriginSecret')]
    param(
        [parameter(Mandatory, Position=0)]
        [string]$Resolver,

        [parameter(Mandatory, Position=1)]
        [hashtable]$Options
    )

    # Let's avoid repeatadly calling the resolver if we're getting the same credential
    # Instead, we'll compute a checksum of the options and store the credential in a cache
    # We'll lookup the credential by the checksum in the cache first before we go out to the resolver

    $resolverPath = "$moduleRoot\Resolvers\$resolver"
    if (Test-Path -Path $resolverPath) {
        $json = ConvertTo-Json -InputObject $options
        $hash = _getHash -Text $json
        if ($script:credentialCache.ContainsKey($hash)) {
            $cred = $script:credentialCache.$hash
            Write-Verbose -Message ($msgs.gpos_cache_hit -f $hash)
        } else {
            $cred = & "$resolverPath\Resolve.ps1" -Options $options
            $script:credentialCache.Add($hash, $cred)
        }
        return $cred
    } else {
        $knownResolvers = Get-ChildItem -Path "$moduleRoot\Resolvers\" -Directory | Select-Object -ExpandProperty Name
        $knownResolversTxt = $knownResolvers -join ', '
        throw ($msgs.gpos_unknown_resolver -f $resolver, $knownResolvers)
    }
}