From: Thomas Lord <lord@emf.net>
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: Andreas Schwab <schwab@suse.de>, Jason Earl <jearl@xmission.com>,
emacs-devel@gnu.org, bazaar@lists.canonical.com
Subject: Re: Emacs Bazaar repository
Date: Fri, 14 Mar 2008 13:12:48 -0700 [thread overview]
Message-ID: <47DADC40.4090209@emf.net> (raw)
In-Reply-To: <jwv1w6dkto3.fsf-monnier+emacs@gnu.org>
Stefan Monnier wrote:
> Even if we end up using this tree to generate the initial Bzr tree, I'd
> be interested to know who to add merge info to a Bzr repository.
>
>
This is a frustrating development, from my perspective.
Arch was designed to *not* be monolithic, in some specific
ways that are relevant to problems like this:
Arch defines a "global name-space" for projects, branches,
and revisions -- but the idea is that you can use that name-space
without using all of Arch. Users disliked a few superficial
attributes of the Arch name-space but the basic idea of
having one is sound. Without picking a specific DVCS,
one can still pick a distributed, global name-space for revisions.
Arch records merge history in the source tree itself, using
ordinary files, referring to that global name-space. The
source tree, not some external database, tells you what has
been merged into a given revision. So, again,
you can use Arch's way of recording merge history even if
you don't use Arch itself. In practice, it's like having a
Changelog but an extra-fancy changelog that tells you
(or the merge tools you use) the merge history. All that the
underlying DVCS has to do is make it possible to look up
various trees (or deltas between them) using the global names.
If you start with those two things, global names for
revisions and in-tree merge-history, then your perspective
on distributed revision control should change completely.
For example, merge operations need not any longer be
some built-in facility of the revision control system. Rather,
merge operations are, by definition, algorithms that do some
diffing and patching by looking at in-tree merge history
and comparing various trees that are named there. A merge
operator can be coded abstractly, in a way that works
across multiple revision control systems.
If a project like emacs, instead of picking a DVCS, picks
a naming convention for revisions and a representation
convention for merge history, then portability between
DVCS systems becomes a largely moot issue.
-t
next prev parent reply other threads:[~2008-03-14 20:12 UTC|newest]
Thread overview: 236+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-12 23:41 Emacs Bazaar repository Jason Earl
2008-03-13 1:48 ` Stefan Monnier
2008-03-13 1:52 ` dhruva
2008-03-13 2:26 ` Bastien
2008-03-13 2:28 ` Stefan Monnier
2008-03-13 3:12 ` dhruva
2008-03-13 4:06 ` Karl Fogel
2008-03-13 4:11 ` Jonathan Lange
2008-03-29 1:00 ` Xavier Maillard
2008-03-13 15:30 ` Karl Fogel
2008-03-13 15:58 ` dhruva
2008-03-13 16:50 ` Jason Earl
2008-03-13 20:18 ` How to spell "commit" [was: bikeshedding bzr (or similar) :] Stephen J. Turnbull
2008-03-13 4:09 ` Emacs Bazaar repository Karl Fogel
2008-03-13 4:15 ` Jonathan Lange
2008-03-13 4:30 ` Jonathan Lange
2008-03-14 1:11 ` Dan Nicolaescu
2008-03-14 1:51 ` Jason Earl
2008-03-14 5:10 ` Jonathan Lange
2008-03-13 9:58 ` Andreas Schwab
2008-03-13 22:13 ` Jonathan Lange
2008-03-14 10:27 ` Andreas Schwab
2008-03-14 10:36 ` David Kastrup
2008-03-13 5:08 ` Jason Earl
2008-03-13 10:39 ` Juanma Barranquero
2008-03-13 14:45 ` Stefan Monnier
2008-03-13 4:19 ` Eric Hanchrow
2008-03-13 5:20 ` Jason Earl
2008-03-13 8:04 ` dhruva
2008-03-13 9:04 ` Thien-Thi Nguyen
2008-03-13 9:41 ` David Kastrup
2008-03-13 12:08 ` Thien-Thi Nguyen
2008-03-13 23:46 ` Jonathan Lange
2008-03-14 2:52 ` dhruva
2008-03-14 3:00 ` Jason Earl
2008-03-14 3:03 ` Martin Pool
2008-03-14 5:36 ` Stephen J. Turnbull
2008-03-14 7:03 ` Martin Pool
2008-03-15 4:44 ` Stephen J. Turnbull
2008-03-14 10:30 ` Andreas Schwab
2008-03-14 15:02 ` Giorgos Keramidas
2008-03-13 11:20 ` James Westby
2008-03-13 16:37 ` Jason Earl
2008-03-13 7:43 ` Thien-Thi Nguyen
2008-03-13 8:49 ` Jason Earl
2008-03-13 9:07 ` Thien-Thi Nguyen
2008-03-13 13:11 ` Aaron Bentley
2008-03-13 11:43 ` Andreas Schwab
2008-03-13 11:55 ` David Kastrup
2008-03-14 9:58 ` Matthieu Moy
2008-03-14 10:42 ` Andreas Schwab
2008-03-14 12:24 ` Matthieu Moy
[not found] ` <8562053f49b38b1584b86e1e4d1ec6e6, vpqbq5htrwx.fsf@bauges.imag.fr>
2008-03-14 12:42 ` David Ingamells
2008-03-14 13:05 ` Andreas Schwab
2008-03-14 12:40 ` Eli Zaretskii
2008-03-14 8:23 ` John Arbash Meinel
2008-03-14 13:32 ` Andreas Schwab
2008-03-14 13:39 ` James Westby
2008-03-14 14:13 ` Matthieu Moy
2008-03-14 14:30 ` Andreas Schwab
2008-03-14 14:37 ` Nicholas Allen
2008-03-14 16:17 ` David Kastrup
2008-03-14 16:32 ` Daniel Mark Watkins
2008-03-14 15:15 ` David Allouche
2008-03-14 15:21 ` James Westby
2008-03-14 15:43 ` Matthieu Moy
2008-03-14 13:35 ` David Kastrup
2008-03-14 13:44 ` James Westby
2008-03-14 13:59 ` David Kastrup
2008-03-14 14:09 ` James Westby
2008-03-14 14:29 ` Nicholas Allen
2008-03-15 0:39 ` Stephen J. Turnbull
2008-03-15 10:30 ` James Westby
2008-03-15 12:30 ` James Westby
2008-03-14 23:34 ` Stephen J. Turnbull
2008-03-17 10:41 ` Matthieu Moy
2008-03-17 12:39 ` Sergei Organov
2008-03-18 1:48 ` Dan Nicolaescu
2008-03-18 2:13 ` dhruva
2008-03-18 4:03 ` Karl Fogel
2008-03-18 5:00 ` dhruva
2008-03-18 5:40 ` Jonathan Lange
2008-03-18 9:17 ` Andreas Schwab
2008-03-18 10:00 ` dhruva
2008-03-19 5:44 ` Bastien
2008-03-19 9:42 ` Juanma Barranquero
2008-03-19 14:04 ` Bastien
2008-03-19 14:49 ` Juanma Barranquero
2008-03-19 15:30 ` Bastien
2008-03-29 1:00 ` Xavier Maillard
2008-03-18 16:50 ` Stefan Monnier
2008-03-18 18:15 ` Juanma Barranquero
2008-03-20 14:00 ` Stefan Monnier
2008-03-20 14:10 ` Jason Rumney
2008-03-20 15:33 ` Stefan Monnier
2008-03-20 20:34 ` Eli Zaretskii
2008-03-21 12:51 ` dhruva
2008-03-29 1:00 ` Xavier Maillard
2008-03-18 19:31 ` Mike Mattie
2008-03-18 19:27 ` Richard Stallman
2008-03-18 20:05 ` Andreas Schwab
2008-03-18 20:26 ` Thien-Thi Nguyen
2008-03-22 4:23 ` Michael Olson
2008-03-22 11:18 ` Thien-Thi Nguyen
2008-03-24 6:19 ` Michael Olson
2008-03-25 9:36 ` Thien-Thi Nguyen
2008-03-20 1:04 ` Jonathan Lange
2008-03-18 20:58 ` Brian Cully
2008-03-18 21:13 ` Mike Mattie
2008-03-18 21:45 ` Stefan Monnier
2008-03-18 22:02 ` Jonathan Lange
2008-03-19 1:21 ` Stefan Monnier
2008-03-18 23:18 ` Chong Yidong
2008-03-18 23:46 ` Nick Roberts
2008-03-19 0:13 ` Thomas Lord
2008-03-19 0:17 ` Mike Mattie
2008-03-19 1:14 ` Thomas Lord
2008-03-19 0:12 ` Johannes Weiner
2008-03-26 7:56 ` David Kastrup
2008-03-27 22:22 ` Johannes Weiner
2008-03-29 1:00 ` Xavier Maillard
2008-03-14 12:56 ` dhruva
2008-03-14 13:10 ` Lennart Borgman (gmail)
2008-03-14 13:23 ` dhruva
2008-03-14 13:26 ` Andreas Schwab
2008-03-14 14:19 ` Matthieu Moy
2008-03-14 14:29 ` Lennart Borgman (gmail)
2008-03-15 0:43 ` Jonathan Rockway
2008-03-15 14:37 ` Eli Zaretskii
2008-03-15 15:06 ` dhruva
2008-03-15 0:44 ` Stephen J. Turnbull
2008-03-17 10:43 ` Matthieu Moy
2008-03-14 22:26 ` Martin Geisler
2008-03-15 12:09 ` dhruva
2008-03-15 21:32 ` Martin Geisler
2008-03-25 21:46 ` Giorgos Keramidas
2008-03-19 10:50 ` Sascha Wilde
2008-03-14 13:03 ` Andreas Schwab
2008-03-14 14:24 ` Matthieu Moy
2008-03-14 14:41 ` Andreas Schwab
2008-03-14 14:46 ` Jelmer Vernooij
2008-03-14 15:15 ` Andreas Schwab
2008-03-15 0:49 ` Harald Meland
2008-03-14 18:04 ` Dan Nicolaescu
2008-03-14 19:42 ` Stefan Monnier
2008-03-14 19:47 ` Andreas Schwab
2008-03-14 20:01 ` Mathias Dahl
2008-03-14 20:06 ` Andreas Schwab
2008-03-14 21:43 ` Karl Fogel
2008-03-15 0:00 ` Stephen J. Turnbull
2008-03-13 20:27 ` Eli Zaretskii
2008-03-14 10:23 ` Andreas Schwab
2008-03-14 3:56 ` Forest Bond
2008-03-14 10:32 ` Andreas Schwab
2008-03-14 11:28 ` Thomas Lord
2008-03-14 22:23 ` Stephen J. Turnbull
2008-03-14 23:49 ` Thomas Lord
2008-03-14 4:52 ` Jonathan Lange
2008-03-14 6:21 ` Dan Nicolaescu
2008-03-14 6:33 ` Alexander Belchenko
2008-03-14 7:16 ` Dan Nicolaescu
2008-03-14 9:18 ` Juanma Barranquero
2008-03-14 10:08 ` Matthew D. Fuller
2008-03-14 10:14 ` Juanma Barranquero
2008-03-19 16:31 ` Nicholas Allen
2008-03-14 10:35 ` Andreas Schwab
2008-03-14 10:37 ` Andreas Schwab
2008-03-14 11:30 ` Matt Nordhoff
2008-03-29 1:00 ` Xavier Maillard
2008-03-13 13:07 ` Andrea Russo
2008-03-14 9:16 ` Nicholas Allen
2008-03-13 14:18 ` Andreas Schwab
2008-03-14 18:08 ` Stefan Monnier
2008-03-14 18:35 ` Jason Earl
2008-03-14 18:51 ` Andreas Schwab
2008-03-14 19:15 ` Stefan Monnier
2008-03-14 19:32 ` Andreas Schwab
2008-03-14 20:12 ` Thomas Lord [this message]
2008-03-14 18:31 ` Goffredo Baroncelli
2008-03-16 18:57 ` Stefan Monnier
2008-03-16 19:53 ` Andreas Schwab
2008-03-17 15:00 ` Michael Haggerty
2008-03-17 16:37 ` Andreas Schwab
2008-03-16 21:47 ` Toshio Kuratomi
2008-03-18 15:43 ` Emacs repository benchmark: bzr and git Teemu Likonen
2008-03-18 15:51 ` Lennart Borgman (gmail)
2008-03-18 16:05 ` dhruva
2008-03-19 2:53 ` Richard Stallman
2008-03-27 1:32 ` Jonathan Lange
2008-03-27 2:24 ` Stephen J. Turnbull
2008-03-27 2:55 ` Stefan Monnier
2008-03-27 11:58 ` dhruva
2008-03-27 13:59 ` Vincent Ladeuil
2008-03-29 1:17 ` Stefan Monnier
2008-03-29 1:30 ` James Westby
2008-03-29 3:09 ` Stefan Monnier
2008-03-29 4:06 ` James Westby
2008-03-29 4:50 ` Stefan Monnier
2008-03-29 1:00 ` Xavier Maillard
2008-03-29 4:34 ` David Cournapeau
2008-03-31 0:00 ` Xavier Maillard
2008-03-29 1:00 ` Xavier Maillard
2008-03-29 9:19 ` Andreas Schwab
2008-03-29 9:58 ` David Kastrup
2008-03-29 10:13 ` dhruva
2008-03-29 10:26 ` David Kastrup
2008-03-31 0:00 ` Xavier Maillard
2008-03-29 14:55 ` Randal L. Schwartz
2008-03-29 16:35 ` Óscar Fuentes
2008-03-29 18:13 ` tomas
2008-03-29 21:05 ` Stephen J. Turnbull
2008-03-30 5:49 ` Richard Stallman
2008-03-30 5:49 ` Richard Stallman
2008-03-30 6:25 ` Jonathan Rockway
2008-03-30 19:56 ` Richard Stallman
2008-03-31 0:00 ` Xavier Maillard
2008-03-18 16:19 ` Matthieu Moy
2008-03-19 9:43 ` Teemu Likonen
2008-03-18 16:02 ` Matthieu Moy
2008-03-18 16:33 ` dhruva
2008-03-18 18:41 ` Jonathan Corbet
2008-03-19 1:40 ` dhruva
2008-03-18 21:04 ` Eli Zaretskii
2008-03-18 17:11 ` Teemu Likonen
2008-03-18 17:43 ` Stefan Monnier
2008-03-18 18:20 ` Juanma Barranquero
2008-03-18 16:43 ` Andreas Schwab
2008-03-18 19:19 ` Teemu Likonen
2008-03-18 20:22 ` James Westby
2008-03-19 11:37 ` Emacs repository benchmark: bzr and git (rerun) Teemu Likonen
2008-03-19 12:17 ` James Westby
2008-03-19 22:39 ` Robert Collins
2008-03-19 16:41 ` Teemu Likonen
2008-03-22 17:59 ` Emacs Bazaar repository Stefan Monnier
2008-03-22 19:59 ` Andreas Schwab
2008-03-24 7:53 ` Christian Faulhammer
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