Nant equivalent of the Ant Replace task - ant

Question

Looking for the equivalent of Ant Replace task in Nant

Answer 1

As far as I can tell, the filter features in NAnt is exactly what you're looking for. Supported by the <copy> and <move> tasks, you define token replacement expressions that will transform file content during file copy/move operations.

Answer 2

There is no direct equivalent in Nant.
This link http://maonet.wordpress.com/2008/08/12/replace-file-content-in-nant-task/ has a couple of options.

Answer 3

You can write a custom task:
<target name="deftask-replregexp"
description="define custum task like ants task replaceregexp">
<script language="C#">
<!-- NAnt 0.92 reference states that this is loaded by default. Do not
know why this is required. -->
<references>
<include name="System.dll"/>
</references>
<imports>
<import namespace="System.Text.RegularExpressions" />
</imports>
<code>
<![CDATA[
[TaskName("replaceregexp")]
public class ReplaceRegExp : Task
{
#region Public Instance Properties
[TaskAttribute("file", Required=true)]
public string InFile { get; set; }
[TaskAttribute("match", Required=true)]
public string Match { get; set; }
[TaskAttribute("replace", Required=true)]
public string Replace { get; set; }
#endregion Public Instance Properties
#region Override implementation of Task
protected override void ExecuteTask()
{
if ( !File.Exists(this.InFile) )
{
throw new BuildException("The file \"" + this.InFile
+ "\" does " + "not exist.");
}
doReplaceRegExp( this.InFile, this.Match, this.Replace);
}
private static void doReplaceRegExp(String inFile,
String pattern,
String replacement)
{
String outFile = Path.GetTempFileName();
Regex regex = new Regex(pattern, RegexOptions.Compiled
| RegexOptions.IgnoreCase);
bool replaceDone = false;
try
{
using (StreamReader input = new StreamReader(inFile, true))
using (TextWriter output = new StreamWriter(
new FileStream(outFile,
FileMode.Create),
input.CurrentEncoding))
{
String line;
do
{
line = input.ReadLine();
if (line != null)
{
System.Text.RegularExpressions.Match m
= regex.Match(line);
if (m.Success)
{
replaceDone = true;
line = regex.Replace(line, replacement, 1);
}
output.WriteLine(line);
}
} while (line != null);
input.Close();
output.Close();
}
if (replaceDone)
{
File.Copy(outFile, inFile, true);
}
}
finally
{
if (outFile != null && File.Exists(outFile))
{
File.Delete(outFile);
}
}
}
#endregion Override implementation of Task
}
]]>
</code>
</script>
</target>