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From: "Eric S. Raymond" <esr@thyrsus.com>
To: Richard Stallman <rms@gnu.org>
Cc: acm@muc.de, eliz@gnu.org, emacs-devel@gnu.org, esr@snark.thyrsus.com
Subject: Re: What a modern collaboration toolkit looks like
Date: Wed, 2 Jan 2008 07:17:45 -0500	[thread overview]
Message-ID: <20080102121745.GD17588@thyrsus.com> (raw)
In-Reply-To: <E1JA0I8-0002I3-Hq@fencepost.gnu.org>

Richard Stallman <rms@gnu.org>:
> Is this substantially different from CVS, or is it just relabeling?
> It sounds like `git push' is basically equivalent to CVS commit.

I have not yet studied git specifically (that's coming after I finish
the evaluations on Arch and monotone), but I believe all the modern
DVCSes handle this the same way.  In my survey paper, I'm calling
it the "commit-before-merge" model, as opposed to "merge-before-commit"
which is what CVS and Subversion do.  It seems to have originated with
monotone.

CVS and Subversion try to maintain a linear version history unless you
do explicit branching.  So when you commit a change against an out-of-date
revision, they raise a conflict; you have to merge news before being
allowed to finish the commit.

In modern DVCSes, a push never blocks. The sequence of changesets you
developed is grafted into the repo as a branch attached to the
revision you pulled from.

If no one else has committed or pushed against that revision, the line
of development remains linear.  If someone has, you have the analogue
of a CVS conflict -- the revision is now a branch point with two
histories going forward.  

Later, someone may do a merge operation that fuses those two branches
together again.  Thus, "commit-before-merge".

This is certainly the way monotone, Mercurial, and bzr operate.  As
I said, I have not yet studied git specifically but I'm pretty sure
it works the same way.
-- 
		<a href="http://www.catb.org/~esr/">Eric S. Raymond</a>

  parent reply	other threads:[~2008-01-02 12:17 UTC|newest]

Thread overview: 277+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-12-30 12:22 What a modern collaboration toolkit looks like Eric S. Raymond
2007-12-30 15:32 ` Thien-Thi Nguyen
2007-12-30 15:42 ` Richard Stallman
2007-12-30 17:22   ` Eric S. Raymond
2007-12-30 20:25     ` Robert J. Chassell
2007-12-30 21:55     ` Nick Roberts
2007-12-30 22:25       ` Lennart Borgman (gmail)
2007-12-30 22:58         ` Richard Stallman
2007-12-30 22:58     ` Richard Stallman
2007-12-31  2:58       ` Eric S. Raymond
2007-12-31 12:14         ` Thien-Thi Nguyen
2008-01-01 23:57           ` John S. Yates, Jr.
2008-01-02  1:46             ` Thien-Thi Nguyen
2007-12-31 22:29         ` Richard Stallman
2008-01-01  0:19           ` Leo
2007-12-31  4:31 ` Eli Zaretskii
2007-12-31 13:07   ` Eric S. Raymond
2007-12-31 20:57     ` Eli Zaretskii
2007-12-31 21:41       ` Eric S. Raymond
2007-12-31 23:00         ` Nick Roberts
2008-01-01  0:50           ` Eric S. Raymond
2008-01-01  4:22             ` Eli Zaretskii
2008-01-01  6:20               ` Eric S. Raymond
2007-12-31 23:12         ` Eli Zaretskii
2008-01-01  0:27           ` Dan Nicolaescu
2008-01-01  3:00             ` Mike Mattie
2008-01-01  7:57               ` Drew Adams
2008-01-02 19:28               ` Agustin Martin
2008-01-03  9:50               ` Richard Stallman
2008-01-05  3:34                 ` Mike Mattie
2008-01-06  8:09                   ` Richard Stallman
2008-01-03  9:50               ` Richard Stallman
2008-01-01 20:44             ` Eli Zaretskii
2008-01-02  4:17               ` Dan Nicolaescu
2008-01-05 10:48                 ` Eli Zaretskii
2008-01-01  0:57           ` Eric S. Raymond
2008-01-01  4:21             ` Eli Zaretskii
2008-01-01  0:10         ` Miles Bader
2008-01-01  1:06           ` Eric S. Raymond
2008-01-01  1:41             ` Miles Bader
2008-01-01  2:16               ` Eric S. Raymond
2008-01-01 19:43           ` Tom Tromey
2008-01-01 21:11             ` Nick Roberts
2008-01-02  0:25             ` Miles Bader
2008-01-02  1:12               ` Tom Tromey
2008-01-02 17:19                 ` On-the-fly compiling (was Re: What a modern collaboration toolkit looks like) Mark A. Hershberger
2008-01-02 20:57                   ` On-the-fly compiling Stefan Monnier
2008-01-02 22:33                     ` Lennart Borgman (gmail)
2008-01-02 23:09                   ` Tom Tromey
2008-01-02  9:53             ` What a modern collaboration toolkit looks like Richard Stallman
2008-01-01 11:28       ` Tassilo Horn
2008-01-01 20:36         ` Eli Zaretskii
2008-01-02  0:29           ` Miles Bader
2008-01-02  4:14             ` Eli Zaretskii
2008-01-02  4:33               ` Miles Bader
2008-01-02  8:24                 ` Werner LEMBERG
2008-01-02  8:20           ` Tassilo Horn
2008-01-03  9:50             ` Richard Stallman
2008-01-03 13:15               ` Ævar Arnfjörð Bjarmason
2008-01-04 13:56                 ` Stefan Monnier
2008-01-02  8:41           ` tomas
2008-01-03  9:50         ` Richard Stallman
2008-01-03 10:16           ` Miles Bader
2008-01-05  5:55             ` Richard Stallman
2008-01-05  6:59               ` Óscar Fuentes
2008-01-05 15:29                 ` Eli Zaretskii
2008-01-05 19:53                   ` Óscar Fuentes
2008-01-06  8:09                 ` Richard Stallman
2008-01-05  8:55               ` David Kastrup
2008-01-05  9:55                 ` Werner LEMBERG
2008-01-05 15:23                 ` Eli Zaretskii
2008-01-05 15:31                   ` Lars Magne Ingebrigtsen
2008-01-05 15:39                   ` David Kastrup
2008-01-06  8:09                 ` Richard Stallman
2008-01-06  9:51                   ` tomas
2008-01-06 11:02                   ` David Kastrup
2008-01-06 12:05                     ` Robert J. Chassell
2008-01-06 12:40                       ` David Kastrup
2008-01-06 16:51                         ` Robert J. Chassell
2008-01-06 17:03                           ` David Kastrup
2008-01-07  4:18                         ` Richard Stallman
2008-01-05 22:46               ` Stefan Monnier
2008-01-06 18:09                 ` Richard Stallman
2008-01-07 17:17               ` Gregory Collins
2008-01-07 23:21                 ` Stephen J. Turnbull
2008-01-08  0:25                   ` Gregory Collins
2008-01-08  0:51                     ` David Kastrup
2008-01-08  2:43                       ` Mike Mattie
2008-01-08  3:03                         ` YAMAMOTO Mitsuharu
2008-01-08  4:25                           ` Mike Mattie
2008-01-08 19:07                 ` Richard Stallman
2008-01-03 10:32           ` David Kastrup
2008-01-01 17:11     ` Alan Mackenzie
2008-01-01 18:05       ` Werner LEMBERG
2008-01-01 18:27         ` Alan Mackenzie
2008-01-01 18:28           ` Werner LEMBERG
2008-01-02  9:53             ` Richard Stallman
2008-01-02 10:36               ` Werner LEMBERG
2008-01-02 12:23                 ` Eric S. Raymond
2008-01-04  5:27                 ` Richard Stallman
2008-01-02 11:27               ` Thien-Thi Nguyen
2008-01-02 12:17               ` Eric S. Raymond [this message]
2008-01-03  1:26                 ` Stephen J. Turnbull
2008-01-03  2:49                   ` Eric S. Raymond
2008-01-04  5:27                 ` Richard Stallman
2008-01-04  5:35                   ` Miles Bader
2008-01-04 12:47                     ` Eric S. Raymond
2008-01-05 14:30                     ` Richard Stallman
2008-01-06  1:10                       ` Miles Bader
2008-01-04 12:45                   ` Eric S. Raymond
2008-01-05 14:30                     ` Richard Stallman
2008-01-05 15:29                       ` Eric S. Raymond
2008-01-05 15:59                       ` Andreas Schwab
2008-01-06  2:14                         ` Mike Mattie
2008-01-03  1:08               ` Giorgos Keramidas
2008-01-03  2:56                 ` Eric S. Raymond
2008-01-03  3:18                   ` Giorgos Keramidas
2008-01-04  5:27                 ` Richard Stallman
2008-01-04  8:51                   ` David Kastrup
2008-01-05 14:30                     ` Richard Stallman
2008-01-05 15:28                       ` David Kastrup
2008-01-06 10:46                         ` Richard Stallman
2008-01-06 11:10                           ` David Kastrup
2008-01-07  4:18                             ` Richard Stallman
2008-01-07  4:36                               ` dhruva
2008-01-07  4:52                               ` Sam Steingold
2008-01-07  5:09                                 ` dhruva
2008-01-07  8:17                                 ` David Kastrup
2008-01-07 15:37                                   ` Stefan Monnier
2008-01-07 15:47                                     ` David Kastrup
2008-01-07 16:22                                       ` Stefan Monnier
2008-01-07 17:09                                         ` David Kastrup
2008-01-07 15:40                                 ` CHENG Gao
2008-01-07 23:36                                   ` Stephen J. Turnbull
2008-01-08  4:31                                     ` CHENG Gao
2008-01-08  5:07                                     ` Mike Mattie
2008-01-08  2:56                                   ` Mike Mattie
2008-01-08  9:37                                     ` Andreas Schwab
2008-01-07  5:16                               ` Jason Earl
2008-01-07 17:16                                 ` Richard Stallman
2008-01-07 17:45                                   ` Gregory Collins
2008-01-08 19:07                                     ` Richard Stallman
2008-01-08 19:50                                       ` Miles Bader
2008-01-13 20:06                                       ` Giorgos Keramidas
2008-01-14 11:28                                         ` Richard Stallman
2008-01-07 21:28                                   ` Jason Earl
2008-01-07  8:15                               ` David Kastrup
2008-01-07  8:33                                 ` Giorgos Keramidas
2008-01-07 23:50                                   ` Stephen J. Turnbull
2008-01-05 21:11                       ` Stephen J. Turnbull
2008-01-06 18:08                         ` Richard Stallman
2008-01-07  9:35                       ` Piet van Oostrum
2008-01-01 20:53         ` Nick Roberts
2008-01-02  9:53           ` Richard Stallman
2008-01-02 12:24             ` Eric S. Raymond
2008-01-02 15:19               ` David Kastrup
2008-01-02 20:35                 ` Karl Fogel
2008-01-02 19:19                   ` Andreas Schwab
2008-01-02 19:23                   ` Romain Francoise
2008-01-03  1:18                 ` Giorgos Keramidas
2008-01-03  7:55                   ` David Kastrup
2008-01-02  9:53         ` Richard Stallman
2008-01-02 10:03           ` David Kastrup
2008-01-02 10:05           ` Tassilo Horn
2008-01-02 11:31             ` Alan Mackenzie
2008-01-02 11:28               ` Tassilo Horn
2008-01-02 14:26           ` Óscar Fuentes
2008-01-02 19:48             ` Karl Fogel
2008-01-02 18:43               ` Andreas Schwab
2008-01-02 22:10               ` Alfred M. Szmidt
2008-01-03  2:58                 ` Karl Fogel
2008-01-03  1:21               ` Giorgos Keramidas
2008-01-03  9:14                 ` Andreas Schwab
2008-01-03 10:57                   ` Giorgos Keramidas
2008-01-01 19:37       ` Eric S. Raymond
2008-01-01 21:46         ` Alan Mackenzie
2008-01-01 22:49           ` Eric S. Raymond
2008-01-02 17:05             ` Mark A. Hershberger
2008-01-03  9:49             ` Richard Stallman
2008-01-02  8:35           ` Tassilo Horn
2008-01-02  5:54         ` John S. Yates, Jr.
2008-01-02 11:52           ` Eric S. Raymond
2008-01-03  9:50           ` Richard Stallman
2008-01-02  8:51         ` tomas
2008-01-02  9:53         ` Richard Stallman
2008-01-01 22:01       ` Romain Francoise
2007-12-31 13:11 ` Alan Mackenzie
2007-12-31 13:24   ` Miles Bader
2007-12-31 13:44     ` Alan Mackenzie
2007-12-31 15:45       ` Eric S. Raymond
2007-12-31 15:14     ` Juanma Barranquero
2007-12-31 15:31     ` Eric S. Raymond
2007-12-31 15:25   ` Eric S. Raymond
2008-01-01 20:34     ` Alan Mackenzie
2008-01-01 20:57       ` Eric S. Raymond
2008-01-02  9:53         ` Richard Stallman
2008-01-02 12:29           ` Eric S. Raymond
2008-01-02 12:59             ` dhruva
2008-01-02 13:11               ` Miles Bader
2008-01-02 13:17               ` Tassilo Horn
2008-01-02 13:49                 ` David Kastrup
2008-01-04  5:28                   ` Richard Stallman
2008-01-04  7:03                     ` John S. Yates, Jr.
2008-01-05 14:29                       ` Richard Stallman
2008-01-02 13:48               ` Werner LEMBERG
2008-01-02 13:56                 ` dhruva
2008-01-02 14:55                 ` Eric S. Raymond
2008-01-03  1:13                 ` Giorgos Keramidas
2008-01-02 14:50               ` Eric S. Raymond
2008-01-19 17:45 ` Jari Aalto
2008-01-20  2:59   ` dhruva
2008-01-20  5:10     ` Miles Bader
2008-01-20  5:36       ` Juanma Barranquero
2008-01-20  6:03         ` Miles Bader
2008-01-20 19:28           ` Eli Zaretskii
2008-01-20 20:42             ` Juanma Barranquero
2008-01-20 20:17           ` Juanma Barranquero
2008-01-20 20:28           ` Juanma Barranquero
2008-01-21  2:11             ` Miles Bader
2008-01-21  2:38               ` Karl Fogel
2008-01-21  2:49                 ` Miles Bader
2008-01-21  3:06                   ` Nick Roberts
2008-01-21  3:17                     ` Miles Bader
2008-01-21  3:26                     ` Stephen J. Turnbull
2008-01-21  3:16                   ` Glenn Morris
2008-01-21  4:11                     ` Nick Roberts
2008-01-21 10:00                     ` Thien-Thi Nguyen
2008-01-21  2:41               ` Juanma Barranquero
2008-01-21  3:01               ` Nick Roberts
2008-01-21  9:07   ` Richard Stallman
2008-01-21 15:51     ` Dan Nicolaescu
2008-01-21 17:37       ` Miles Bader
2008-01-21 17:53         ` Tom Tromey
2008-01-21 20:06           ` Stefan Monnier
2008-01-21 19:50             ` Tom Tromey
2008-01-22  0:33         ` Dan Nicolaescu
2008-01-24 14:43     ` Mark A. Hershberger
2008-01-24 15:00       ` Juanma Barranquero
2008-01-24 15:34         ` dhruva
2008-01-24 19:52           ` Stephen J. Turnbull
2008-01-25  0:43             ` Juanma Barranquero
2008-01-25 22:47             ` Richard Stallman
2008-01-25 23:13               ` Alfred M. Szmidt
2008-01-25 23:36                 ` Miles Bader
2008-01-27  0:45                   ` Richard Stallman
2008-01-27 17:39                     ` David Kastrup
2008-01-27 20:06                       ` Nick Roberts
2008-01-27 22:21                         ` David Kastrup
2008-01-27 23:58                         ` Johan Bockgård
2008-01-28  7:17                         ` Richard Stallman
2008-01-28  7:17                         ` Richard Stallman
2008-01-28  7:57                           ` GNU Project [was: Re: What a modern collaboration toolkit looks like] Nick Roberts
2008-01-28 21:32                             ` Richard Stallman
2008-01-28  7:18                       ` What a modern collaboration toolkit looks like Richard Stallman
2008-01-28  7:30                         ` David Kastrup
2008-01-28  9:18                           ` Stephen J. Turnbull
2008-01-28 21:32                           ` Richard Stallman
2008-01-26  1:23                 ` Thomas Lord
  -- strict thread matches above, loose matches on Subject: below --
2008-01-01  3:09 Nick Roberts
2008-01-01  6:24 ` Eric S. Raymond
2008-01-03 20:32 Trey Jackson
2008-01-04  9:46 ` dhruva
2008-01-05 13:36   ` Eli Zaretskii
2008-01-05 15:04     ` dhruva
2008-01-05 15:13       ` Eli Zaretskii
2008-01-06  1:17     ` Miles Bader
2008-01-04 13:43 ` Gianluca Della Vedova
2008-01-05 14:30 ` Richard Stallman
2008-01-06  5:03   ` Trey Jackson
2008-01-06  6:58     ` Nick Roberts
2008-01-07  4:57       ` Trey Jackson
2008-01-07  5:54         ` Nick Roberts
2008-01-06 18:09     ` Richard Stallman
2008-01-07  5:16       ` Trey Jackson
2008-01-07  6:15         ` Nick Roberts
2008-01-07 15:41         ` Stefan Monnier
2008-01-29  5:43 Werner LEMBERG

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