From owner-freebsd-current@FreeBSD.ORG  Mon Mar  2 09:26:02 2015
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115])
 (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by hub.freebsd.org (Postfix) with ESMTPS id 7C662BC8;
 Mon,  2 Mar 2015 09:26:02 +0000 (UTC)
Received: from theravensnest.org (theraven.freebsd.your.org [216.14.102.27])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client CN "cloud.theravensnest.org",
 Issuer "StartCom Class 1 Primary Intermediate Server CA" (not verified))
 by mx1.freebsd.org (Postfix) with ESMTPS id 41553750;
 Mon,  2 Mar 2015 09:26:01 +0000 (UTC)
Received: from [192.168.0.7] (cpc16-cmbg15-2-0-cust60.5-4.cable.virginm.net
 [86.5.162.61]) (authenticated bits=0)
 by theravensnest.org (8.15.1/8.14.9) with ESMTPSA id t229Pwl1024388
 (version=TLSv1 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO);
 Mon, 2 Mar 2015 09:26:00 GMT (envelope-from theraven@FreeBSD.org)
X-Authentication-Warning: theravensnest.org: Host
 cpc16-cmbg15-2-0-cust60.5-4.cable.virginm.net [86.5.162.61] claimed to be
 [192.168.0.7]
Content-Type: text/plain; charset=us-ascii
Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2070.6\))
Subject: Re: Massive libxo-zation that breaks everything
From: David Chisnall <theraven@FreeBSD.org>
In-Reply-To: <54F42A82.1020308@freebsd.org>
Date: Mon, 2 Mar 2015 09:25:53 +0000
Content-Transfer-Encoding: quoted-printable
Message-Id: <B727735C-8C3C-4DFE-A017-0EC6B0152BA5@FreeBSD.org>
References: <54F31510.7050607@hot.ee> <54F34B6E.2040809@astrodoggroup.com>
 <CAG=rPVfcB1Fy_8mHq-t5Ay07yrzuSGthQ0ZcGzvp0XG9gSSzkg@mail.gmail.com>
 <54F35F29.4000603@astrodoggroup.com> <54F36431.30506@freebsd.org>
 <54F42A82.1020308@freebsd.org>
To: Julian Elischer <julian@freebsd.org>
X-Mailer: Apple Mail (2.2070.6)
Cc: freebsd-current@freebsd.org, Allan Jude <allanjude@freebsd.org>
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.18-1
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
 <freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-current>, 
 <mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current/>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
 <mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 02 Mar 2015 09:26:02 -0000

On 2 Mar 2015, at 09:16, Julian Elischer <julian@freebsd.org> wrote:
>=20
> if we develop a suitable post processor with pluggable grammars, we =
save a lot of work.
> given enough examples you could almost have automatically generated =
grammars.

This decoupled approach is problematic.  A large part of the point of =
libxo is to allow changing the human-readable output without breaking =
tools that consume the output.  Now I need to keep the tool that =
consumes it and the tool that produces it in sync, so that's an extra =
set of moving parts.  When you throw jails with multiple versions of =
world into the mix, it becomes a recipe for disaster.

David