Ian
Jaroslaw Kowalski wrote:
I'd like to propose a new function set that would help solve the issue of generating a classpath from a list of files. The functions deal with named filesets like this:
<project> <fileset id="zzz"> <includes name="*.cs" /> </fileset> <fileset id="rrr"> <includes name="*.csu7987987" /> </fileset> <echo message="flatten: ${fileset::flatten('zzz',';')}" /> <echo message="exists: ${fileset::exists('zzz')}" /> <echo message="exists: ${fileset::exists('zzz2')}" /> <echo message="is-empty: ${fileset::is-empty('zzz')}" /> <echo message="is-empty: ${fileset::is-empty('rrr')}" /> <echo message="file-count: ${fileset::get-file-count('zzz')}" /> <echo message="file-name[0]: ${fileset::get-file-name('zzz',0)}" /> </project>
Proposed implementation is attached (no help yet, but if we decide this should go in, I'll write some help text).
With this you'd be able to do:
<fileset id="jarfiles"> <includes name="${ant.home}/lib/*.jar" /> </fileset>
<exec commandline "...-classpath ${fileset::flatten('jarfiles',';')}... " />
I believe that this technique would be useful in many more places. Should I commit?
Jarek
----- Original Message ----- From: <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Friday, March 19, 2004 2:57 PM
Subject: [nant-dev] New to the list
between
Hi everyone! I joined this list because there are some differences
aNant and Ant which have been causing me trouble. I wanted to post my solutions in the hopes that they may be useful. If it's stuff that's already been thought of, just tell me to shut up :)
The first problem I ran up against was running Ant from Nant. On the Windows platform, Ant is run through a batch file which does not communicate the program exit code. So the Nant build always believes that the Ant build succeeded. To get around this, I actually call the Java class file like so:
<exec program="${java.home}/bin/java.exe" workingdir="${mbpa.home}" commandline="-classpath ${ant.cp} org.apache.tools.ant.launch.Launcher build" failonerror="true" />
This is obviously not a problem, however getting the classpath correct is
Antpain because you have to add all the jars in the ant/lib directory since Nant doesn't have any clue what a Java classpath is. To achieve this, I wrote a little script:
<script language="C#"> <code><![CDATA[ public static void ScriptMain( Project project ) { string ald = project.Properties["ant.home"] + "/lib"; string jh = project.Properties["java.home"]; string cp = jh + "/lib/tools.jar"; DirectoryInfo di = new DirectoryInfo(ald); FileInfo[] files = di.GetFiles("*.jar"); foreach (FileInfo fi in files) cp += ";" + ald + "/" + fi.Name; project.Properties["ant.cp"] = cp; } ]]></code> </script>
It's a simple script and it has been working very well for me. Is there a
better way to do this? I guess what I want to achieve eventually is an
thetask for Nant. I imagine it would require that a Java task also be created. Is anybody else working on this kind of thing? I'd appreciate some suggestions on what it would take to start working on an Ant task. And if you don't think this is desirable, please speak up so that I don't waste my time.
Alright, the second thing I ran into is a big annoyance to me. Ant has
ability to load a properties file using the following:{
<property file="build.properties" />
I could not find anything similar to this in Nant, so please tell me if I just missed something. I want to share a properties file between Nant and Ant, so I needed something that would load the properties from that file. To do this, I wrote the following script outside of a target:
<script language="C#">
<code><![CDATA[
public static void ScriptMain( Project project ) {
try {
string prop_file = project.Properties["prop.file"];
using (StreamReader sr = new StreamReader(prop_file))
lookstring line; while ((line = sr.ReadLine()) != null) { Regex re = new Regex("^\\s*([\\w_\\-\\.]+)\\s*=\\s*(.*?)\\s*$"); if (re.IsMatch(line)) { Match m = re.Match(line); string prop_name = m.Groups[1].ToString(); string prop_val = m.Groups[2].ToString(); // The following line does semantic processing on the property before // adding it to the list of properties. prop_val = project.Properties.ExpandProperties(prop_val, Location.UnknownLocation); project.Properties[prop_name] = prop_val; } } } } catch (Exception exc) { throw new BuildException("Exception caught while loading properties file:\n" + exc.Message); } } ]]></code> </script>
This is also a bit of functionality that I'd like to add to Nant. This
code doesn't verify the property file at all, it just finds lines that
like properties and ignores the rest. Also, there's this line:of
prop_val = project.Properties.ExpandProperties(prop_val, Location.UnknownLocation);
This line seems troublesome to me because if something later changes one
those properties, the dependent properties will not change. I did try tocapabilities
mark the properties as dynamic through the PropertyDictionary, but Nant
comes back with an error explaining that MarkDynamic is not defined. Any
suggestions on how to fix this? And how much validation would be required
for a properties file in order to add the same properties file
that Ant has to Nant?
Thanks for your time,
Dustin
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------------------------------------------------------------------------
// NAnt - A .NET build tool // Copyright (C) 2001-2003 Gerry Shaw // // This program is free software; you can redistribute it and/or modify // it under the terms of the GNU General Public License as published by // the Free Software Foundation; either version 2 of the License, or // (at your option) any later version. // // This program is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License // along with this program; if not, write to the Free Software // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA // // Ian Maclean ([EMAIL PROTECTED]) // Jaroslaw Kowalski ([EMAIL PROTECTED])
using System; using System.IO; using System.Text; using System.Collections; using System.Reflection; using System.Globalization;
using NAnt.Core; using NAnt.Core.Types; using NAnt.Core.Attributes;
namespace NAnt.Core.Functions { [FunctionSet("fileset", "Fileset")] public class FilesetFunctions : FunctionSetBase { #region Public Instance Constructors
public FilesetFunctions(Project project, PropertyDictionary propDict) : base(project, propDict) { }
#endregion Public Instance Constructors
#region Public Instance Methods
[Function("exists")] public bool Exists(string filesetId) { DataTypeBase dtb = Project.DataTypeReferences[filesetId]; if (dtb == null) return false; if (dtb is FileSet) return true; else return false; }
[Function("get-file-count")] public int GetFileCount(string filesetId) { FileSet fs = GetFileSetByID(filesetId); return fs.FileNames.Count; }
[Function("get-file-name")] public string GetFileCount(string filesetId, int pos) { FileSet fs = GetFileSetByID(filesetId); return fs.FileNames[pos]; }
[Function("is-empty")] public bool IsEmpty(string filesetId) { FileSet fs = GetFileSetByID(filesetId); return fs.FileNames.Count == 0; }
[Function("flatten")] public string Flatten(string filesetId, string separator) { FileSet fs = GetFileSetByID(filesetId); StringBuilder result = new StringBuilder();
foreach (string s in fs.FileNames) { if (result.Length != 0) result.Append(separator);
result.Append(s); }
return result.ToString(); }
private FileSet GetFileSetByID(string id) { DataTypeBase dtb = Project.DataTypeReferences[id]; if (dtb == null) throw new ArgumentException(String.Format(CultureInfo.InvariantCulture, "Fileset: '{0}' not found", id)); if (!(dtb is FileSet)) throw new ArgumentException(String.Format(CultureInfo.InvariantCulture, "Fileset: '{0}' not found", id)); return (FileSet)dtb; }
#endregion Public Instance Methods
}
}
--
Ian MacLean, Developer, ActiveState, a division of Sophos
http://www.ActiveState.com
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