A RegEx replace script which uses Hybrid Batch\JScript code

repl.bat

@if (@X)==(@Y) @end /* Harmless hybrid line that begins a JScript comment

::************ Documentation ***********
::REPL.BAT version 4.1
:::
:::REPL  Search  Replace  [Options  [SourceVar]]
:::REPL  /?[REGEX|REPLACE]
:::REPL  /V
:::
:::  Performs a global regular expression search and replace operation on
:::  each line of input from stdin and prints the result to stdout.
:::
:::  Each parameter may be optionally enclosed by double quotes. The double
:::  quotes are not considered part of the argument. The quotes are required
:::  if the parameter contains a batch token delimiter like space, tab, comma,
:::  semicolon. The quotes should also be used if the argument contains a
:::  batch special character like &, |, etc. so that the special character
:::  does not need to be escaped with ^.
:::
:::  If called with a single argument of /?, then prints help documentation
:::  to stdout. If a single argument of /?REGEX, then opens up Microsoft's
:::  JScript regular expression documentation within your browser. If a single
:::  argument of /?REPLACE, then opens up Microsoft's JScript REPLACE
:::  documentation within your browser.
:::
:::  If called with a single argument of /V, case insensitive, then prints
:::  the version of REPL.BAT.
:::
:::  Search  - By default, this is a case sensitive JScript (ECMA) regular
:::            expression expressed as a string.
:::
:::            JScript regex syntax documentation is available at
:::            http://msdn.microsoft.com/en-us/library/ae5bf541(v=vs.80).aspx
:::
:::  Replace - By default, this is the string to be used as a replacement for
:::            each found search expression. Full support is provided for
:::            substituion patterns available to the JScript replace method.
:::
:::            For example, $& represents the portion of the source that matched
:::            the entire search pattern, $1 represents the first captured
:::            submatch, $2 the second captured submatch, etc. A $ literal
:::            can be escaped as $$.
:::
:::            An empty replacement string must be represented as "".
:::
:::            Replace substitution pattern syntax is fully documented at
:::            http://msdn.microsoft.com/en-US/library/efy6s3e6(v=vs.80).aspx
:::
:::  Options - An optional string of characters used to alter the behavior
:::            of REPL. The option characters are case insensitive, and may
:::            appear in any order.
:::
:::            I - Makes the search case-insensitive.
:::
:::            L - The Search is treated as a string literal instead of a
:::                regular expression. Also, all $ found in Replace are
:::                treated as $ literals.
:::
:::            B - The Search must match the beginning of a line.
:::                Mostly used with literal searches.
:::
:::            E - The Search must match the end of a line.
:::                Mostly used with literal searches.
:::
:::            V - Search and Replace represent the name of environment
:::                variables that contain the respective values. An undefined
:::                variable is treated as an empty string.
:::
:::            A - Only print altered lines. Unaltered lines are discarded.
:::                If both the M and V options are present, then prints the
:::                entire result if there was a change anywhere in the string.
:::                The A option is incompatible with the M option unless the S
:::                option is also present.
:::
:::            M - Multi-line mode. The entire contents of stdin is read and
:::                processed in one pass instead of line by line, thus enabling
:::                search for \n. This also enables preservation of the original
:::                line terminators. If the M option is not present, then every
:::                printed line is termiated with carriage return and line feed.
:::                The M option is incompatible with the A option unless the S
:::                option is also present.
:::
:::                Note: If working with binary data containing NULL bytes,
:::                      then the M option must be used.
:::
:::            X - Enables extended substitution pattern syntax with support
:::                for the following escape sequences within the Replace string:
:::
:::                \\     -  Backslash
:::                \b     -  Backspace
:::                \f     -  Formfeed
:::                \n     -  Newline
:::                \q     -  Quote
:::                \r     -  Carriage Return
:::                \t     -  Horizontal Tab
:::                \v     -  Vertical Tab
:::                \xnn   -  Extended ASCII byte code expressed as 2 hex digits
:::                \unnnn -  Unicode character expressed as 4 hex digits
:::
:::                Also enables the \q escape sequence for the Search string.
:::                The other escape sequences are already standard for a regular
:::                expression Search string.
:::
:::                Also modifies the behavior of \xnn in the Search string to work
:::                properly with extended ASCII byte codes.
:::
:::                Extended escape sequences are supported even when the L option
:::                is used. Both Search and Replace support all of the extended
:::                escape sequences if both the X and L opions are combined.
:::
:::            S - The source is read from an environment variable instead of
:::                from stdin. The name of the source environment variable is
:::                specified in the next argument after the option string. Without
:::                the M option, ^ anchors the beginning of the string, and $ the
:::                end of the string. With the M option, ^ anchors the beginning
:::                of a line, and $ the end of a line.
:::
::: REPL.BAT was written by Dave Benham, with assistance from DosTips user Aacini
::: to get \xnn to work properly with extended ASCII byte codes. Also assistance
::: from DosTips user penpen diagnosing issues reading NULL bytes, along with a
::: workaround. REPL.BAT was originally posted at:
::: http://www.dostips.com/forum/viewtopic.php?f=3&t=3855
:::

::************ Batch portion ***********
@echo off
if .%2 equ . (
  if "%~1" equ "/?" (
    <"%~f0" cscript //E:JScript //nologo "%~f0" "^:::" "" a
    exit /b 0
  ) else if /i "%~1" equ "/?regex" (
    explorer "http://msdn.microsoft.com/en-us/library/ae5bf541(v=vs.80).aspx"
    exit /b 0
  ) else if /i "%~1" equ "/?replace" (
    explorer "http://msdn.microsoft.com/en-US/library/efy6s3e6(v=vs.80).aspx"
    exit /b 0
  ) else if /i "%~1" equ "/V" (
    <"%~f0" cscript //E:JScript //nologo "%~f0" "^::(REPL\.BAT version)" "$1" a
    exit /b 0
  ) else (
    call :err "Insufficient arguments"
    exit /b 1
  )
)
echo(%~3|findstr /i "[^SMILEBVXA]" >nul && (
  call :err "Invalid option(s)"
  exit /b 1
)
echo(%~3|findstr /i "M"|findstr /i "A"|findstr /vi "S" >nul && (
  call :err "Incompatible options"
  exit /b 1
)
cscript //E:JScript //nologo "%~f0" %*
exit /b 0

:err
>&2 echo ERROR: %~1. Use REPL /? to get help.
exit /b

************* JScript portion **********/
var env=WScript.CreateObject("WScript.Shell").Environment("Process");
var args=WScript.Arguments;
var search=args.Item(0);
var replace=args.Item(1);
var options="g";
if (args.length>2) options+=args.Item(2).toLowerCase();
var multi=(options.indexOf("m")>=0);
var alterations=(options.indexOf("a")>=0);
if (alterations) options=options.replace(/a/g,"");
var srcVar=(options.indexOf("s")>=0);
if (srcVar) options=options.replace(/s/g,"");
if (options.indexOf("v")>=0) {
  options=options.replace(/v/g,"");
  search=env(search);
  replace=env(replace);
}
if (options.indexOf("x")>=0) {
  options=options.replace(/x/g,"");
  replace=replace.replace(/\\\\/g,"\\B");
  replace=replace.replace(/\\q/g,"\"");
  replace=replace.replace(/\\x80/g,"\\u20AC");
  replace=replace.replace(/\\x82/g,"\\u201A");
  replace=replace.replace(/\\x83/g,"\\u0192");
  replace=replace.replace(/\\x84/g,"\\u201E");
  replace=replace.replace(/\\x85/g,"\\u2026");
  replace=replace.replace(/\\x86/g,"\\u2020");
  replace=replace.replace(/\\x87/g,"\\u2021");
  replace=replace.replace(/\\x88/g,"\\u02C6");
  replace=replace.replace(/\\x89/g,"\\u2030");
  replace=replace.replace(/\\x8[aA]/g,"\\u0160");
  replace=replace.replace(/\\x8[bB]/g,"\\u2039");
  replace=replace.replace(/\\x8[cC]/g,"\\u0152");
  replace=replace.replace(/\\x8[eE]/g,"\\u017D");
  replace=replace.replace(/\\x91/g,"\\u2018");
  replace=replace.replace(/\\x92/g,"\\u2019");
  replace=replace.replace(/\\x93/g,"\\u201C");
  replace=replace.replace(/\\x94/g,"\\u201D");
  replace=replace.replace(/\\x95/g,"\\u2022");
  replace=replace.replace(/\\x96/g,"\\u2013");
  replace=replace.replace(/\\x97/g,"\\u2014");
  replace=replace.replace(/\\x98/g,"\\u02DC");
  replace=replace.replace(/\\x99/g,"\\u2122");
  replace=replace.replace(/\\x9[aA]/g,"\\u0161");
  replace=replace.replace(/\\x9[bB]/g,"\\u203A");
  replace=replace.replace(/\\x9[cC]/g,"\\u0153");
  replace=replace.replace(/\\x9[dD]/g,"\\u009D");
  replace=replace.replace(/\\x9[eE]/g,"\\u017E");
  replace=replace.replace(/\\x9[fF]/g,"\\u0178");
  replace=replace.replace(/\\b/g,"\b");
  replace=replace.replace(/\\f/g,"\f");
  replace=replace.replace(/\\n/g,"\n");
  replace=replace.replace(/\\r/g,"\r");
  replace=replace.replace(/\\t/g,"\t");
  replace=replace.replace(/\\v/g,"\v");
  replace=replace.replace(/\\x[0-9a-fA-F]{2}|\\u[0-9a-fA-F]{4}/g,
    function($0,$1,$2){
      return String.fromCharCode(parseInt("0x"+$0.substring(2)));
    }
  );
  replace=replace.replace(/\\B/g,"\\");
  search=search.replace(/\\\\/g,"\\B");
  search=search.replace(/\\q/g,"\"");
  search=search.replace(/\\x80/g,"\\u20AC");
  search=search.replace(/\\x82/g,"\\u201A");
  search=search.replace(/\\x83/g,"\\u0192");
  search=search.replace(/\\x84/g,"\\u201E");
  search=search.replace(/\\x85/g,"\\u2026");
  search=search.replace(/\\x86/g,"\\u2020");
  search=search.replace(/\\x87/g,"\\u2021");
  search=search.replace(/\\x88/g,"\\u02C6");
  search=search.replace(/\\x89/g,"\\u2030");
  search=search.replace(/\\x8[aA]/g,"\\u0160");
  search=search.replace(/\\x8[bB]/g,"\\u2039");
  search=search.replace(/\\x8[cC]/g,"\\u0152");
  search=search.replace(/\\x8[eE]/g,"\\u017D");
  search=search.replace(/\\x91/g,"\\u2018");
  search=search.replace(/\\x92/g,"\\u2019");
  search=search.replace(/\\x93/g,"\\u201C");
  search=search.replace(/\\x94/g,"\\u201D");
  search=search.replace(/\\x95/g,"\\u2022");
  search=search.replace(/\\x96/g,"\\u2013");
  search=search.replace(/\\x97/g,"\\u2014");
  search=search.replace(/\\x98/g,"\\u02DC");
  search=search.replace(/\\x99/g,"\\u2122");
  search=search.replace(/\\x9[aA]/g,"\\u0161");
  search=search.replace(/\\x9[bB]/g,"\\u203A");
  search=search.replace(/\\x9[cC]/g,"\\u0153");
  search=search.replace(/\\x9[dD]/g,"\\u009D");
  search=search.replace(/\\x9[eE]/g,"\\u017E");
  search=search.replace(/\\x9[fF]/g,"\\u0178");
  if (options.indexOf("l")>=0) {
    search=search.replace(/\\b/g,"\b");
    search=search.replace(/\\f/g,"\f");
    search=search.replace(/\\n/g,"\n");
    search=search.replace(/\\r/g,"\r");
    search=search.replace(/\\t/g,"\t");
    search=search.replace(/\\v/g,"\v");
    search=search.replace(/\\x[0-9a-fA-F]{2}|\\u[0-9a-fA-F]{4}/g,
      function($0,$1,$2){
        return String.fromCharCode(parseInt("0x"+$0.substring(2)));
      }
    );
    search=search.replace(/\\B/g,"\\");
  } else search=search.replace(/\\B/g,"\\\\");
}
if (options.indexOf("l")>=0) {
  options=options.replace(/l/g,"");
  search=search.replace(/([.^$*+?()[{\\|])/g,"\\$1");
  replace=replace.replace(/\$/g,"$$$$");
}
if (options.indexOf("b")>=0) {
  options=options.replace(/b/g,"");
  search="^"+search
}
if (options.indexOf("e")>=0) {
  options=options.replace(/e/g,"");
  search=search+"$"
}
var search=new RegExp(search,options);
var str1, str2;

if (srcVar) {
  str1=env(args.Item(3));
  str2=str1.replace(search,replace);
  if (!alterations || str1!=str2) if (multi) {
    WScript.Stdout.Write(str2);
  } else {
    WScript.Stdout.WriteLine(str2);
  }
} else if (multi){
  var buf=1024;
  str1="";
  while (!WScript.StdIn.AtEndOfStream) {
    str1+=WScript.StdIn.Read(buf);
    buf*=2
  }
  WScript.Stdout.Write(str1.replace(search,replace));
} else {
  while (!WScript.StdIn.AtEndOfStream) {
    str1=WScript.StdIn.ReadLine();
    str2=str1.replace(search,replace);
    if (!alterations || str1!=str2) WScript.Stdout.WriteLine(str2);
  }
}

REPL.BAT was written by Dave Benham, with assistance from DosTips user Aacini to get \xnn to work properly with extended ASCII byte codes. Also assistance from DosTips user penpen diagnosing issues reading NULL bytes, along with a workaround. REPL.BAT was originally posted at dostips.com and that is probably your best best for the most current incarnation of this script.

The original post that I found this script in can be found here .

There is a similar javascript search script called jgrep.bat in my gist repository.