Return-Path: 
 <user-return-64657-apmail-ant-user-archive=ant.apache.org@ant.apache.org>
Delivered-To: apmail-ant-user-archive@www.apache.org
Received: (qmail 55592 invoked from network); 28 Apr 2008 09:51:42 -0000
Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.2)
  by minotaur.apache.org with SMTP; 28 Apr 2008 09:51:42 -0000
Received: (qmail 93926 invoked by uid 500); 28 Apr 2008 09:51:40 -0000
Delivered-To: apmail-ant-user-archive@ant.apache.org
Received: (qmail 93893 invoked by uid 500); 28 Apr 2008 09:51:40 -0000
Mailing-List: contact user-help@ant.apache.org; run by ezmlm
Precedence: bulk
List-Unsubscribe: <mailto:user-unsubscribe@ant.apache.org>
List-Help: <mailto:user-help@ant.apache.org>
List-Post: <mailto:user@ant.apache.org>
List-Id: "Ant Users List" <user.ant.apache.org>
Reply-To: "Ant Users List" <user@ant.apache.org>
Delivered-To: mailing list user@ant.apache.org
Received: (qmail 93882 invoked by uid 99); 28 Apr 2008 09:51:40 -0000
Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136)
    by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 28 Apr 2008 02:51:40 -0700
X-ASF-Spam-Status: No, hits=-2.8 required=10.0
	tests=RCVD_IN_DNSWL_MED,SPF_NEUTRAL
X-Spam-Check-By: apache.org
Received-SPF: neutral (athena.apache.org: local policy)
Received: from [192.6.10.2] (HELO colossus.hpl.hp.com) (192.6.10.2)
    by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 28 Apr 2008 09:50:53 +0000
Received: from localhost (localhost.localdomain [127.0.0.1])
	by colossus.hpl.hp.com (Postfix) with ESMTP id 690556BA02
	for <user@ant.apache.org>; Mon, 28 Apr 2008 10:50:53 +0100 (BST)
X-Virus-Scanned: amavisd-new at hplb.hpl.hp.com
Received: from colossus.hpl.hp.com ([127.0.0.1])
	by localhost (colossus.hpl.hp.com [127.0.0.1]) (amavisd-new, port 10024)
	with LMTP id NASxqOLt3G1X for <user@ant.apache.org>;
	Mon, 28 Apr 2008 10:50:52 +0100 (BST)
Received: from ha-node-br2.hpl.hp.com (ha-node-br2.hpl.hp.com [16.25.144.57])
	(using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits))
	(No client certificate requested)
	by colossus.hpl.hp.com (Postfix) with ESMTP id C76F96B9E7
	for <user@ant.apache.org>; Mon, 28 Apr 2008 10:50:51 +0100 (BST)
MailScanner-NULL-Check: 1209981030.34505@/XWhRvuG/4qHc7yQaCaOLw
Received: from [16.25.171.118] (morzine.hpl.hp.com [16.25.171.118])
	by ha-node-br2.hpl.hp.com (8.14.1/8.13.4) with ESMTP id m3S9oTjh013859
	(version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO)
	for <user@ant.apache.org>; Mon, 28 Apr 2008 10:50:30 +0100 (BST)
Message-ID: <48159DE7.3050105@apache.org>
Date: Mon, 28 Apr 2008 10:50:31 +0100
From: Steve Loughran <stevel@apache.org>
User-Agent: Thunderbird 2.0.0.12 (X11/20080213)
MIME-Version: 1.0
To: Ant Users List <user@ant.apache.org>
Subject: Re: <javac> rebuilds even if source not changed
References: <20080427133312.GA430@lefuneste.homelinux.org>
In-Reply-To: <20080427133312.GA430@lefuneste.homelinux.org>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
X-HPL-MailScanner-Information: Please contact the ISP for more information
X-MailScanner-ID: m3S9oTjh013859
X-HPL-MailScanner: Found to be clean
X-HPL-MailScanner-From: stevel@apache.org
X-Virus-Checked: Checked by ClamAV on apache.org

Jean-Rene David wrote:
> Hello,
> 
> When a class is in a package, the <javac> target
> always rebuilds it even if the source hasn't
> changed. Here's a test case:
> 
> $ ant -version
> Apache Ant version 1.7.0 compiled on December 13 2006
> 
> $ ls
> build.xml
> Welcome.java
> 
> $ cat Welcome.java
> package My.Class;
> public class Welcome
> {
>    public static void main(String[] args)
>    {
>       System.out.println("Hello World!");
>    }
> }
> 
> $ cat build.xml
> <?xml version="1.0"?>
> <project name="test" default="build" basedir=".">
>    <target name="build">
>       <mkdir dir="foo" />
>       <javac srcdir="." destdir="foo" />
>    </target>
> </project>
> 
> $ ant
> Buildfile: build.xml
> 
> build:
>     [mkdir] Created dir: /tmp/testcase/foo
>     [javac] Compiling 1 source file to /tmp/testcase/foo
> 
> BUILD SUCCESSFUL
> Total time: 1 second
> 
> Now I just run it again:
> 
> $ ant
> Buildfile: build.xml
> 
> build:
>     [javac] Compiling 1 source file to /tmp/testcase/foo
> 
> BUILD SUCCESSFUL
> Total time: 0 seconds
> 
> And it recompiles but the source file hasn't
> changed.
> 
> My class is part of the My.Class package, so javac
> put it in: foo/My/Class:
> 
> $ find 
> .
> ./Welcome.java
> ./build.xml
> ./foo
> ./foo/My
> ./foo/My/Class
> ./foo/My/Class/Welcome.class



> 
> But the <javac> task doesn't recurse the hierarchy
> to find the class file. It only looks in the
> "destdir" itself. So if I just:
> 
> $ touch foo/Welcome.class

you must move the class under the package name it is in. Without that 
not only does ant not do any dependency checking (is it expected to 
remember where every .class file comes from?) and sun's javac compiler 
wont build files in the correct order.
-- 
Steve Loughran                  http://www.1060.org/blogxter/publish/5
Author: Ant in Action           http://antbook.org/

---------------------------------------------------------------------
To unsubscribe, e-mail: user-unsubscribe@ant.apache.org
For additional commands, e-mail: user-help@ant.apache.org