Return-Path: 
 <user-return-72567-apmail-ant-user-archive=ant.apache.org@ant.apache.org>
X-Original-To: apmail-ant-user-archive@www.apache.org
Delivered-To: apmail-ant-user-archive@www.apache.org
Received: from mail.apache.org (hermes.apache.org [140.211.11.3])
	by minotaur.apache.org (Postfix) with SMTP id 34E14DDE8
	for <apmail-ant-user-archive@www.apache.org>;
 Tue, 20 Nov 2012 05:06:35 +0000 (UTC)
Received: (qmail 55282 invoked by uid 500); 20 Nov 2012 05:06:35 -0000
Delivered-To: apmail-ant-user-archive@ant.apache.org
Received: (qmail 54230 invoked by uid 500); 20 Nov 2012 05:06:24 -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 54198 invoked by uid 99); 20 Nov 2012 05:06:23 -0000
Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136)
    by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 20 Nov 2012 05:06:23 +0000
X-ASF-Spam-Status: No, hits=0.7 required=5.0
	tests=SPF_NEUTRAL
X-Spam-Check-By: apache.org
Received-SPF: neutral (athena.apache.org: local policy)
Received: from [88.84.128.168] (HELO samaflost.de) (88.84.128.168)
    by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 20 Nov 2012 05:06:17 +0000
Received: from localhost (localhost.localdomain [127.0.0.1])
	by samaflost.de (Postfix) with ESMTP id 41ADD28985DA
	for <user@ant.apache.org>; Tue, 20 Nov 2012 06:05:54 +0100 (CET)
Received: from samaflost.de ([127.0.0.1])
	by localhost (v35516.1blu.de [127.0.0.1]) (amavisd-new, port 10024)
	with ESMTP id t15jZseNLwPJ for <user@ant.apache.org>;
	Tue, 20 Nov 2012 06:05:46 +0100 (CET)
Received: by samaflost.de (Postfix, from userid 1000)
	id B82D128985DC; Tue, 20 Nov 2012 06:05:46 +0100 (CET)
From: Stefan Bodewig <bodewig@apache.org>
To: user@ant.apache.org
Subject: Re: zip from zip with mappers
References: 
 <CAA04BLmitEATz_umLVgRP+5Maze=zPa+Qt7U3jrzddZCHggckQ@mail.gmail.com>
Date: Tue, 20 Nov 2012 06:05:46 +0100
In-Reply-To: 
 <CAA04BLmitEATz_umLVgRP+5Maze=zPa+Qt7U3jrzddZCHggckQ@mail.gmail.com>
	(Patrick Martin's message of "Mon, 19 Nov 2012 13:39:25 +0100")
Message-ID: <87sj84x3rp.fsf@v35516.1blu.de>
User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.2 (gnu/linux)
MIME-Version: 1.0
Content-Type: text/plain
X-Virus-Checked: Checked by ClamAV on apache.org

On 2012-11-19, Patrick Martin wrote:

> I have a situation where I need to create an archive (zip) from an other
> one, but transforming some path inside. I want to avoid using a temporary
> folder structure as the input files contains a huge amount of entries
> (about 125000...) and this generates quite a lot of I/Os.

> I was thinking of using <zip> and <zipfileset>. However, as <zip> does not
> support <mapper>, it is not possible directly.

> So I thought of using the <mappedresources> resource collection:
> <zip destfile="dest.zip">
> <mappedresources enablemultiplemappings="true">
> <zipfileset src="src.zip" includes="**" />
> <firstmatchmapper> <mapper type="glob" from="fromfolder\*" to="tofolder\*"
> /> <identitymapper /> </firstmatchmapper>
> </mappedresources>
> </zip>

> The mapping is done quite fast but then zip is reeaaally slow (can be seen
> when running in verbose mode).

Yes, this is a known problem with the way Ant deals with zipfileset.

> My guess is that Ant will look for each resource individually and thus
> scan the source zip each time.

It's even worse.  The ZIP file will be reopened and the central
directory re-parsed every time an entry is read.  This is avoided by
special code inside the zip task when the zipfileset is nested directly
into the task.

> Is there any other possibility to achieve zip to zip transfer with mapping
> / transformation (and filtering with include/exclude patterns) ?
> Or is there any way to add <mapper> support in <zip> ?

Filtering should work by using zipfileset directly.  As for mapping, I'm
afraid there is no real solution - apart from coding the ZIP creation
directly in Java.

Stefan

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