src/Metadata/New-XrmChoiceColumn.ps1

<#
    .SYNOPSIS
    Build a PicklistAttributeMetadata for a Dataverse column.

    .DESCRIPTION
    Creates a configured Microsoft.Xrm.Sdk.Metadata.PicklistAttributeMetadata object
    referencing a global option set, ready for New-XrmColumn.

    .PARAMETER LogicalName
    Column logical name.

    .PARAMETER SchemaName
    Column schema name.

    .PARAMETER DisplayName
    Column display name.

    .PARAMETER GlobalOptionSetName
    Global option set name.

    .PARAMETER Description
    Column description label.

    .PARAMETER RequiredLevel
    Required level. Default: None.

    .PARAMETER LanguageCode
    Label language code. Default: 1033.

    .OUTPUTS
    Microsoft.Xrm.Sdk.Metadata.PicklistAttributeMetadata.

    .EXAMPLE
    $attribute = New-XrmChoiceColumn -LogicalName "new_status" -SchemaName "new_Status" -DisplayName "Status" -GlobalOptionSetName "new_statuschoices";
    New-XrmColumn -EntityLogicalName "account" -Attribute $attribute;

    .LINK
    https://learn.microsoft.com/power-apps/developer/data-platform/webapi/reference/picklistattributemetadata
#>

function New-XrmChoiceColumn {
    [CmdletBinding()]
    [OutputType([Microsoft.Xrm.Sdk.Metadata.PicklistAttributeMetadata])]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [string]
        $LogicalName,

        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [string]
        $SchemaName,

        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [string]
        $DisplayName,

        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [string]
        $GlobalOptionSetName,

        [Parameter(Mandatory = $false)]
        [string]
        $Description,

        [Parameter(Mandatory = $false)]
        [Microsoft.Xrm.Sdk.Metadata.AttributeRequiredLevel]
        $RequiredLevel = [Microsoft.Xrm.Sdk.Metadata.AttributeRequiredLevel]::None,

        [Parameter(Mandatory = $false)]
        [int]
        $LanguageCode = 1033
    )
    begin {
        $StopWatch = [System.Diagnostics.Stopwatch]::StartNew();
        Trace-XrmFunction -Name $MyInvocation.MyCommand.Name -Stage Start -Parameters ($MyInvocation.MyCommand.Parameters);
    }
    process {
        $attribute = [Microsoft.Xrm.Sdk.Metadata.PicklistAttributeMetadata]::new();
        $attribute.LogicalName = $LogicalName;
        $attribute.SchemaName = $SchemaName;
        $attribute.DisplayName = New-XrmLabel -Text $DisplayName -LanguageCode $LanguageCode;
        $attribute.RequiredLevel = [Microsoft.Xrm.Sdk.Metadata.AttributeRequiredLevelManagedProperty]::new($RequiredLevel);

        $optionSet = [Microsoft.Xrm.Sdk.Metadata.OptionSetMetadata]::new();
        $optionSet.IsGlobal = $true;
        $optionSet.Name = $GlobalOptionSetName;
        $attribute.OptionSet = $optionSet;

        if (-not [string]::IsNullOrWhiteSpace($Description)) {
            $attribute.Description = New-XrmLabel -Text $Description -LanguageCode $LanguageCode;
        }

        $attribute;
    }
    end {
        $StopWatch.Stop();
        Trace-XrmFunction -Name $MyInvocation.MyCommand.Name -Stage Stop -StopWatch $StopWatch;
    }
}

Set-Alias -Name New-ChoiceColumn -Value New-XrmChoiceColumn;
Export-ModuleMember -Function New-XrmChoiceColumn -Alias *;