Return-Path: <bodewig@bost.de>
Mailing-List: contact ant-dev-help@jakarta.apache.org; run by ezmlm
Delivered-To: mailing list ant-dev@jakarta.apache.org
Received: (qmail 57327 invoked from network); 30 Nov 2000 10:47:04 -0000
Received: from bodewig.bost.de (root@195.227.98.11)
  by locus.apache.org with SMTP; 30 Nov 2000 10:47:04 -0000
Received: (from bodewig@localhost)
	by bodewig.bost.de (8.9.3/8.9.3) id LAA02765;
	Thu, 30 Nov 2000 11:47:04 +0100
X-Authentication-Warning: bodewig.bost.de: bodewig set sender to
 bodewig@bost.de using -f
To: ant-dev@jakarta.apache.org
Subject: Re: [PROPOSAL] jar distribution system
References: <B648726D.1846B%jon@latchkey.com>
From: Stefan Bodewig <bodewig@apache.org>
Date: 30 Nov 2000 11:47:04 +0100
Message-ID: <m3zoih7n4n.fsf@bodewig.bost.de>
Lines: 47
User-Agent: Gnus/5.0807 (Gnus v5.8.7) XEmacs/21.1 (Channel Islands)
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
X-Spam-Rating: locus.apache.org 1.6.2 0/1000/N

Jon Stevens <jon@latchkey.com> wrote:

> I have placed the start of cjan.xml up on the jakarta.apache.org
> site
> 
> <http://jakarta.apache.org/cjan/cjan.xml>
> 

Just a quick thought:

CJAN (the client side application) needs some way to know whether a
given dependency is fulfilled on the local system or not. I see two
options here:

(1) keep track on all JARs that have ever been loaded and installed in
a CJAN registry. 

This forces the user to install every component which might be
available to CJAN through CJAN - I don't think you can expect this on
a multi user system, even for single use boxes this seems too strong
therefore I'd prefer

(2) Add some <available> like functionality. The section describing a
product as well as a service (I like Conor's concept) should hold
something like

<product name="Ant" permissionToDistribute="true">
  <version label="1.2" latest="true">
    <provides classname="org.apache.tools.ant.types.FileSet" />
    <depends service="jaxp" version="1.0" required="true"/>
    ...
  </version>
  <version label="1.1" latest="false">
    <provides classname="org.apache.tools.ant.Main" />
    ...
  </version>
</product>

<service name="jaxp">
  <version label="1.0" latest="false">
    <provides classname="javax.xml.parsers.SAXParserFactory" />
    <provider name="xerces" version="1.2"/>
    <provider name="jaxp_reference" version="1.0"/>
  </version>
</service>

Stefan