private static readonly Regex RegexBetweenTags = new Regex(@">\s+<", RegexOptions.Compiled);
        private static readonly Regex RegexLineBreaks = new Regex(@"\r\s+", RegexOptions.Compiled);

        protected override void Render(HtmlTextWriter writer)
        {
            using (var htmlwriter = new HtmlTextWriter(new System.IO.StringWriter()))
            {
                base.Render(htmlwriter);
                var html = htmlwriter.InnerWriter.ToString();

                html = RegexBetweenTags.Replace(html, "> <");
                html = RegexLineBreaks.Replace(html, string.Empty);
                html = html.Replace("//<![CDATA[", "").Replace("//]]>", "");
                html = html.Replace("// <![CDATA[", "").Replace("// ]]>", "");

                writer.Write(html.Trim());
            }
        }

using System;
using System.IO;
using System.IO.Compression;
using System.Text;
using System.Text.RegularExpressions;
using System.Web;
using System.Web.Mvc;

namespace PWS.Common.ActionFilters
{
    public class CompressAttribute : ActionFilterAttribute
    {
         #region Methods (2) 

        // Public Methods (1) 

        /// <summary>
        /// Called by the ASP.NET MVC framework before the action method executes.
        /// </summary>
        /// <param name="filterContext">The filter context.</param>
        public override void OnActionExecuting(ActionExecutingContext filterContext)
        {
            var response = filterContext.HttpContext.Response;
            if (IsGZipSupported(filterContext.HttpContext.Request))
            {
                String acceptEncoding = filterContext.HttpContext.Request.Headers["Accept-Encoding"];
                if (acceptEncoding.Contains("gzip"))
                {
                    response.Filter = new GZipStream(response.Filter, CompressionMode.Compress);
                    response.AppendHeader("Content-Encoding", "gzip");
                }
                else
                {
                    response.Filter = new DeflateStream(response.Filter, CompressionMode.Compress);
                    response.AppendHeader("Content-Encoding", "deflate");
                }
            }
            // Allow proxy servers to cache encoded and unencoded versions separately
            response.AppendHeader("Vary", "Content-Encoding");
           //حذف فضاهای خالی





            response.Filter = new WhitespaceFilter(response.Filter);
        }
        // Private Methods (1) 

        /// <summary>
        /// Determines whether [is G zip supported] [the specified request].
        /// </summary>
        /// <param name="request">The request.</param>
        /// <returns></returns>
        private Boolean IsGZipSupported(HttpRequestBase request)
        {
            String acceptEncoding = request.Headers["Accept-Encoding"];

            if (acceptEncoding == null) return false;
            return !String.IsNullOrEmpty(acceptEncoding) && acceptEncoding.Contains("gzip") || acceptEncoding.Contains("deflate");
        }

#endregion Methods 
    }

    /// <summary>
    /// Whitespace Filter
    /// </summary>
    public class WhitespaceFilter : Stream
    {
#region Fields (3) 

        private readonly Stream _filter;
        /// <summary>
        /// 
        /// </summary>
        private static readonly Regex RegexAll = new Regex(@"\s+|\t\s+|\n\s+|\r\s+", RegexOptions.Compiled);
        /// <summary>
        /// 
        /// </summary>
        private static readonly Regex RegexTags = new Regex(@">\s+<", RegexOptions.Compiled);

#endregion Fields 

#region Constructors (1) 

        /// <summary>
        /// Initializes a new instance of the <see cref="WhitespaceFilter" /> class.
        /// </summary>
        /// <param name="filter">The filter.</param>
        public WhitespaceFilter(Stream filter)
        {
            _filter = filter;
        }

#endregion Constructors 

#region Properties (5) 

        //methods that need to be overridden from stream
        /// <summary>
        /// When overridden in a derived class, gets a value indicating whether the current stream supports reading.
        /// </summary>
        /// <returns>true if the stream supports reading; otherwise, false.</returns>
        public override bool CanRead
        {
            get { return true; }
        }

        /// <summary>
        /// When overridden in a derived class, gets a value indicating whether the current stream supports seeking.
        /// </summary>
        /// <returns>true if the stream supports seeking; otherwise, false.</returns>
        public override bool CanSeek
        {
            get { return true; }
        }

        /// <summary>
        /// When overridden in a derived class, gets a value indicating whether the current stream supports writing.
        /// </summary>
        /// <returns>true if the stream supports writing; otherwise, false.</returns>
        public override bool CanWrite
        {
            get { return true; }
        }

        /// <summary>
        /// When overridden in a derived class, gets the length in bytes of the stream.
        /// </summary>
        /// <returns>A long value representing the length of the stream in bytes.</returns>
        public override long Length
        {
            get { return 0; }
        }

        /// <summary>
        /// When overridden in a derived class, gets or sets the position within the current stream.
        /// </summary>
        /// <returns>The current position within the stream.</returns>
        public override long Position { get; set; }

#endregion Properties 

#region Methods (6) 

// Public Methods (6) 

        /// <summary>
        /// Closes the current stream and releases any resources (such as sockets and file handles) associated with the current stream. Instead of calling this method, ensure that the stream is properly disposed.
        /// </summary>
        public override void Close()
        {
            _filter.Close();
        }

        /// <summary>
        /// When overridden in a derived class, clears all buffers for this stream and causes any buffered data to be written to the underlying device.
        /// </summary>
        public override void Flush()
        {
            _filter.Flush();
        }

        /// <summary>
        /// When overridden in a derived class, reads a sequence of bytes from the current stream and advances the position within the stream by the number of bytes read.
        /// </summary>
        /// <param name="buffer">An array of bytes. When this method returns, the buffer contains the specified byte array with the values between <paramref name="offset" /> and (<paramref name="offset" /> + <paramref name="count" /> - 1) replaced by the bytes read from the current source.</param>
        /// <param name="offset">The zero-based byte offset in <paramref name="buffer" /> at which to begin storing the data read from the current stream.</param>
        /// <param name="count">The maximum number of bytes to be read from the current stream.</param>
        /// <returns>
        /// The total number of bytes read into the buffer. This can be less than the number of bytes requested if that many bytes are not currently available, or zero (0) if the end of the stream has been reached.
        /// </returns>
        public override int Read(byte[] buffer, int offset, int count)
        {
            return _filter.Read(buffer, offset, count);
        }

        /// <summary>
        /// When overridden in a derived class, sets the position within the current stream.
        /// </summary>
        /// <param name="offset">A byte offset relative to the <paramref name="origin" /> parameter.</param>
        /// <param name="origin">A value of type <see cref="T:System.IO.SeekOrigin" /> indicating the reference point used to obtain the new position.</param>
        /// <returns>
        /// The new position within the current stream.
        /// </returns>
        public override long Seek(long offset, SeekOrigin origin)
        {
            return _filter.Seek(offset, origin);
        }

        /// <summary>
        /// When overridden in a derived class, sets the length of the current stream.
        /// </summary>
        /// <param name="value">The desired length of the current stream in bytes.</param>
        public override void SetLength(long value)
        {
            _filter.SetLength(value);
        }

        /// <summary>
        /// When overridden in a derived class, writes a sequence of bytes to the current stream and advances the current position within this stream by the number of bytes written.
        /// </summary>
        /// <param name="buffer">An array of bytes. This method copies <paramref name="count" /> bytes from <paramref name="buffer" /> to the current stream.</param>
        /// <param name="offset">The zero-based byte offset in <paramref name="buffer" /> at which to begin copying bytes to the current stream.</param>
        /// <param name="count">The number of bytes to be written to the current stream.</param>
        public override void Write(byte[] buffer, int offset, int count)
        {
            string html = Encoding.Default.GetString(buffer);

            //remove whitespace
            html = RegexTags.Replace(html, "> <");
            html = RegexAll.Replace(html, " ");

            byte[] outdata = Encoding.Default.GetBytes(html);

            //write bytes to stream
            _filter.Write(outdata, 0, outdata.GetLength(0));
        }

#endregion Methods 
     }
}

GlobalFilters.Filters.Add(new CompressAttribute());

git log --oneline

اکنون باید این فایل Configuration را به Crescendo معرفی کنیم تا cmdlet را برایمان تولید کند. اینکار را توسط Export-CrescendoModule انجام خواهیم داد: 

Export-CrescendoModule -Configuration ./git-ps.json -ModuleName ./git-ps.psm1

با اجرای دستور فوق، فایل‌های git.psm1 و همچنین git.psd1 تولید خواهند شد. نیاز به بررسی فایل‌های جنریت شده نیست؛ چون تنها جایی که با آن باید در ارتباط باشیم، همان فایل JSON ابتدای بحث است که در ادامه آن را بررسی خواهیم کرد. اما قبل از آن اجازه دهید ماژول تولید شده را Import کنیم و دستور Get-GitLog را وارد کنیم: 

PP /> Import-Module ./git-ps.psd1
PS /> Get-GitLog

usage: git [-v | --version] [-h | --help] [-C <path>] [-c <name>=<value>]
           [--exec-path[=<path>]] [--html-path] [--man-path] [--info-path]
           [-p | --paginate | -P | --no-pager] [--no-replace-objects] [--bare]
           [--git-dir=<path>] [--work-tree=<path>] [--namespace=<name>]
           [--super-prefix=<path>] [--config-env=<name>=<envvar>]
           <command> [<args>]

These are common Git commands used in various situations:

start a working area (see also: git help tutorial)
   clone     Clone a repository into a new directory
   init      Create an empty Git repository or reinitialize an existing one

work on the current change (see also: git help everyday)
   add       Add file contents to the index
   mv        Move or rename a file, a directory, or a symlink
   restore   Restore working tree files
   rm        Remove files from the working tree and from the index

examine the history and state (see also: git help revisions)
   bisect    Use binary search to find the commit that introduced a bug
   diff      Show changes between commits, commit and working tree, etc
   grep      Print lines matching a pattern
   log       Show commit logs
   show      Show various types of objects
   status    Show the working tree status

grow, mark and tweak your common history
   branch    List, create, or delete branches
   commit    Record changes to the repository
   merge     Join two or more development histories together
   rebase    Reapply commits on top of another base tip
   reset     Reset current HEAD to the specified state
   switch    Switch branches
   tag       Create, list, delete or verify a tag object signed with GPG

collaborate (see also: git help workflows)
   fetch     Download objects and refs from another repository
   pull      Fetch from and integrate with another repository or a local branch
   push      Update remote refs along with associated objects

'git help -a' and 'git help -g' list available subcommands and some
concept guides. See 'git help <command>' or 'git help <concept>'
to read about a specific subcommand or concept.
See 'git help git' for an overview of the system.

همانطور که مشاهده میکنید، خروجی دستور git، نمایش داده شده‌است. دلیل آن نیز این است که در فایل configuration، هیچ آرگومانی را به عنوان ورودی آن تعیین نکرده‌ایم. برای اضافه کردن آرگومان‌های موردنظر باید پراپرتی OrginalCommandElements را مقدار دهی کنیم: 

"OriginalCommandElements": ["log", "--oneline"],

بنابراین با فراخوانی دستور Get-GitLog، در اصل دستور git log —oneline فراخوانی خواهد شد:  

PS /> Get-GitLog

e9590e8 init

اما تا اینجا نیز خروجی به صورت رشته‌ایی است. برای داشتن یک خروجی Object، باید پراپرتی OutputHandlers را از Configuration، تغییر دهیم: 

"OutputHandlers": [
  {
    "ParameterSetName": "Default",
    "Handler": "$args[0] | ForEach-Object { $hash, $message = $_.Split(' ', 2) ; [PSCustomObject]@{ Hash = $hash; Message = $message } }"
  }
]

در اینجا توسط args$ به خروجی کامند اصلی دسترسی خواهیم داشت. این خروجی را سپس با کمک ForEach-Object، به یک شیء با پراپرتی‌های Hash و Message تبدیل کرده‌ایم. در اینجا فقط میخواستم روال تهیه یک آبجکت را از کامندهایی که خروجی JSON ندارند، نشان دهم؛ اما خوشبختانه توسط پرچم pretty در git log، امکان تهیه‌ی خروجی JSON را نیز داریم: 

git log --pretty=format:'{"commit": "%h", "author": "%an", "date": "%ad", "message": "%s"}'

در نتیجه عملاً نیازی به split کردن نیست و بجای آن میتوانیم به صورت مستقیم، خروجی را توسط ConvertFrom-Json پارز کنیم: 

"OutputHandlers": [
  {
    "ParameterSetName": "Default",
    "Handler": "$args[0] | ConvertFrom-Json"
  }
]

همچنین درون فایل schema با کمک پراپرتی Parameters، امکان تعریف پارامتر را نیز برای کامند Get-GitLog خواهیم داشت. به عنوان مثال میتوانیم فلگ reverse را نیز به کامند اصلی از طریق PowerShell ارسال کنیم: 

"Parameters": [
  {
    "Name": "reverse",
    "OriginalName": "--reverse",
    "ParameterType": "switch",
    "Description": "Reverse the order of the commits in the output."
  }
],

دقت داشته باشیم که با هربار تغییر فایل schema باید توسط دستور Export-CrescendoModule ماژول موردنظر را تولید کنید:

Export-CrescendoModule -Configuration ./git-ps.json -ModuleName ./git-ps.psm1
Import-Module ./git-ps.psd1

در نهایت cmdletمان به این صورت قابل استفاده خواهد بود: