PowerShell/src/Microsoft.PowerShell.ConsoleHost/host/msh/ConsoleShell.cs

/********************************************************************++
Copyright (c) Microsoft Corporation.  All rights reserved.
--********************************************************************/

using System.Management.Automation;
using System.Management.Automation.Host;
using System.Management.Automation.Runspaces;
using Microsoft.PowerShell;

namespace Microsoft.PowerShell
{
    /// <summary>
    /// This class provides an entry point which is called by minishell's main
    /// to transfer control to Msh console host implementation.
    /// </summary>
    
    public static 
    class ConsoleShell
    {
        /// <summary>
        /// Entry point in to ConsoleShell. This method is called by
        /// main of minishell. 
        /// </summary>
        /// <param name="configuration">
        /// Configuration information which is used to create Runspace.
        /// </param>
        /// 
        /// <param name="bannerText">
        /// Banner text to be displayed by ConsoleHost
        /// </param>
        /// 
        /// <param name="helpText">
        /// Help text for minishell. This is displayed on 'minishell -?'.
        /// </param>
        /// 
        /// <param name="args">
        /// Commandline parameters specified by user.
        /// </param>
        /// 
        /// <returns>
        /// An integer value which should be used as exit code for the
        /// process.
        /// </returns>
        /// 
        public static
        int
        Start(RunspaceConfiguration configuration,
              string bannerText,
              string helpText,
              string[] args)
        {
            return Start(configuration, bannerText, helpText, null, args);
        }

        /// <summary>
        /// 
        /// Entry point in to ConsoleShell. This method is called by the MSHManagedEntrace
        /// 
        /// </summary>
        /// <param name="configuration">
        /// Configuration information which is used to create Runspace.
        /// </param>
        /// 
        /// <param name="bannerText">
        /// Banner text to be displayed by ConsoleHost
        /// </param>
        /// 
        /// <param name="helpText">
        /// Help text for minishell. This is displayed on 'minishell -?'.
        /// </param>
        /// 
        /// <param name="preStartWarning">
        /// Warning occurred prior to this point, for example, a snap-in fails to load beforehand.
        /// This string will be printed out.
        /// </param>
        /// 
        /// <param name="args">
        /// Commandline parameters specified by user.
        /// </param>
        /// 
        /// <returns>
        /// An integer value which should be used as exit code for the
        /// process.
        /// </returns>
        
        internal static
        int
        Start(RunspaceConfiguration configuration,
              string bannerText,
              string helpText,
              string preStartWarning,
              string[] args)
        {
            if (args == null)
            {
                throw PSTraceSource.NewArgumentNullException("args");
            }

            // The default font face used for Powershell Console is Lucida Console. 
            // However certain CJK locales dont support Lucida Console font. Hence for such 
            // locales the console font is updated to Raster dynamically.

            // For NanoServer:
            // 1. There is no GetCurrentConsoleFontEx / SetCurrentConsoleFontEx on NanoServer;
            // 2. We don't handle CJK locales on NanoServer due to lack of win32 API supports on NanoServer.
#if !CORECLR
            ConsoleControl.UpdateLocaleSpecificFont();
#endif

            return ConsoleHost.Start(configuration, bannerText, helpText, preStartWarning, args);
        }
    }
}