dbatools

1.1.19

functions/Get-DbatoolsConfigValue.ps1

                                function Get-DbatoolsConfigValue {

    <#

    .SYNOPSIS

        Returns the configuration value stored under the specified name.

    .DESCRIPTION

        Returns the configuration value stored under the specified name.

        It requires the full name (<Module>.<Name>) and is usually only called by functions.

    .PARAMETER FullName

        The full name (<Module>.<Name>) of the configured value to return.

    .PARAMETER Fallback

        A fallback value to use, if no value was registered to a specific configuration element.

        This basically is a default value that only applies on a "per call" basis, rather than a system-wide default.

    .PARAMETER NotNull

        By default, this function returns null if one tries to retrieve the value from either a Configuration that does not exist or a Configuration whose value was set to null.

        However, sometimes it may be important that some value was returned.

        By specifying this parameter, the function will throw an error if no value was found at all.

    .NOTES

        Tags: Module

        Author: Friedrich Weinmann (@FredWeinmann)

        Website: https://dbatools.io

        Copyright: (c) 2018 by dbatools, licensed under MIT

        License: MIT https://opensource.org/licenses/MIT

    .LINK

        https://dbatools.io/Get-DbatoolsConfigValue

    .EXAMPLE

        PS C:\> Get-DbatoolsConfigValue -Name 'System.MailServer'

        Returns the configured value that was assigned to the key 'System.MailServer'

    .EXAMPLE

        PS C:\> Get-DbatoolsConfigValue -Name 'Default.CoffeeMilk' -Fallback 0

        Returns the configured value for 'Default.CoffeeMilk'. If no such value is configured, it returns '0' instead.

    #>

    [Diagnostics.CodeAnalysis.SuppressMessageAttribute("PSPossibleIncorrectComparisonWithNull", "")]

    [CmdletBinding()]

    param (

        [Alias('Name')]

        [Parameter(Mandatory)]

        [string]$FullName,

        [object]$Fallback,

        [switch]$NotNull

    )

    $FullName = $FullName.ToLowerInvariant()

    $temp = $null

    $temp = [Sqlcollaborative.Dbatools.Configuration.ConfigurationHost]::Configurations[$FullName].Value

    if ($temp -eq $null) { $temp = $Fallback }

    if ($NotNull -and ($temp -eq $null)) {

        Stop-Function -Message "No Configuration Value available for $Name" -EnableException $true -Category InvalidData -Target $FullName

    } else {

        return $temp

    }

}

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