From: Joseph Myers <joseph@codesourcery.com>
To: "Eric S. Raymond" <esr@thyrsus.com>
Cc: Maxim Kuvyrkov <maxim.kuvyrkov@linaro.org>,
GCC Development <gcc@gcc.gnu.org>,
Alexandre Oliva <oliva@gnu.org>, Jeff Law <law@redhat.com>,
Segher Boessenkool <segher@kernel.crashing.org>,
Mark Wielaard <mark@klomp.org>,
"Richard Earnshaw (lists)" <Richard.Earnshaw@arm.com>,
Jakub Jelinek <jakub@redhat.com>, <frnchfrgg@free.fr>
Subject: Re: Proposal for the transition timetable for the move to GIT
Date: Sun, 29 Dec 2019 23:00:00 -0000 [thread overview]
Message-ID: <alpine.DEB.2.21.1912292254340.18291@digraph.polyomino.org.uk> (raw)
In-Reply-To: <20191229224740.GB51787@thyrsus.com>
On Sun, 29 Dec 2019, Eric S. Raymond wrote:
> Joseph Myers <jsm@polyomino.org.uk>:
> > The case you mention is one where there was a merge to a branch not from
> > its immediate parent but from an indirect parent. I don't think it would
> > be hard to support detecting such merges in reposurgeon.
>
> We're working on it.
And the other example branch mentioned (redhat/gcc-9-branch) is a
different case: if the merge from gcc-9-branch to redhat/gcc-9-branch had
been done in the idiomatic way with modern SVN (i.e. naming the branch to
merge from and letting SVN deal with identifying the revisions involved),
I think reposurgeon would have handled it just fine. But the commit
messages indicate the merge was done in an old-fashioned way (naming
individual ranges of revisions to merge manually), which resulted in merge
properties very slightly different from what SVN creates automatically.
Now I understand what the difference is I expect we'll be able to fix that
case as well.
> As Joseph says, one of reposurgeon's design principles is "First, do no harm."
>
> And yes, changelogs are full of malformations and junk like this. I
> saw and dealt with a lifetime's worth while converting the Emacs
> history from bzr to git.
>
> If you try to interpret any random garbage in, you will assuredly
> get garbage out when you least expect it. Often the cost of this
> sort of mistake is not fully realized until it is far too late
> for correction. This is *why* reposurgeon is conservative.
>
> The correct thing for reposurgeon to do is flag unparseable entry
> headers for human intervention, and as of today it does that.
Furthermore, we can compare authors in the different conversions to
identify cases where, based on a manual review, Maxim's heuristics produce
better results for a particular commit, and add those to the list of
fixups in bugdb.py - and that way benefit both from reposurgeon making
choices that are as conservatively safe as possible, which seems a
desirable property for problem cases that haven't been manually reviewed,
and from different heuristics helping suggest improvements in particular
cases.
--
Joseph S. Myers
joseph@codesourcery.com
next prev parent reply other threads:[~2019-12-29 23:00 UTC|newest]
Thread overview: 198+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-17 12:02 Richard Earnshaw (lists)
2019-09-17 12:24 ` Richard Biener
2019-09-17 13:50 ` Richard Earnshaw (lists)
2019-09-17 16:35 ` Joseph Myers
2019-09-17 17:51 ` Richard Earnshaw (lists)
2019-09-17 16:33 ` Joseph Myers
2019-09-19 12:04 ` Janne Blomqvist
2019-09-19 14:43 ` Damian Rouson
2019-09-19 15:30 ` Janne Blomqvist
2019-10-25 14:10 ` Richard Earnshaw (lists)
2019-10-25 16:32 ` Jeff Law
2019-09-19 15:30 ` Richard Earnshaw (lists)
2019-09-19 15:49 ` Damian Rouson
2019-09-19 15:35 ` Maxim Kuvyrkov
2019-12-06 14:44 ` Maxim Kuvyrkov
2019-12-06 17:21 ` Eric S. Raymond
2019-12-06 17:39 ` Richard Biener
2019-12-06 19:46 ` Eric S. Raymond
2019-12-06 20:43 ` Sandra Loosemore
2019-12-07 2:57 ` Segher Boessenkool
2019-12-09 18:19 ` Joseph Myers
2019-12-09 18:40 ` Bernd Schmidt
2019-12-09 20:45 ` Joseph Myers
2019-12-09 22:12 ` Eric S. Raymond
2019-12-09 19:28 ` Eric S. Raymond
2019-12-11 14:40 ` Maxim Kuvyrkov
2019-12-11 15:03 ` Richard Earnshaw (lists)
2019-12-11 15:19 ` Jonathan Wakely
2019-12-11 15:21 ` Richard Earnshaw (lists)
2019-12-11 15:36 ` Joseph Myers
2019-12-11 16:02 ` Jonathan Wakely
2019-12-11 17:47 ` Eric S. Raymond
2019-12-16 2:19 ` Joseph Myers
2019-12-11 15:30 ` Dennis Luehring
2019-12-11 15:36 ` Richard Earnshaw
2019-12-11 17:36 ` Eric S. Raymond
2019-12-06 20:49 ` Bernd Schmidt
2019-12-16 9:53 ` Mark Wielaard
2019-12-16 11:29 ` Joseph Myers
2019-12-16 12:43 ` Mark Wielaard
2019-12-16 13:36 ` Segher Boessenkool
2019-12-16 13:54 ` Eric S. Raymond
2019-12-16 14:05 ` Segher Boessenkool
2019-12-16 14:13 ` Joseph Myers
2019-12-16 15:37 ` Segher Boessenkool
2019-12-16 16:36 ` Joseph Myers
2019-12-16 17:40 ` Jeff Law
2019-12-25 8:12 ` Alexandre Oliva
2019-12-25 12:07 ` Eric S. Raymond
2019-12-25 12:24 ` Segher Boessenkool
2019-12-25 14:16 ` Joseph Myers
2019-12-25 18:50 ` Eric S. Raymond
2019-12-25 19:18 ` Segher Boessenkool
2019-12-26 6:09 ` Alexandre Oliva
2019-12-26 11:04 ` Joseph Myers
2019-12-26 11:17 ` Jakub Jelinek
2019-12-26 12:10 ` Joseph Myers
2019-12-26 16:11 ` Maxim Kuvyrkov
2019-12-26 16:58 ` Joseph Myers
2019-12-26 18:36 ` Jakub Jelinek
2019-12-26 18:59 ` Joseph Myers
2019-12-27 11:21 ` Richard Earnshaw (lists)
2019-12-27 11:33 ` Andrew Pinski
2019-12-27 13:35 ` Segher Boessenkool
2019-12-27 11:35 ` Joseph Myers
2019-12-27 12:37 ` Richard Earnshaw (lists)
2019-12-28 2:27 ` Eric S. Raymond
2019-12-28 11:23 ` Joseph Myers
2019-12-28 12:19 ` Segher Boessenkool
2019-12-28 17:11 ` Richard Earnshaw (lists)
2019-12-28 20:28 ` Segher Boessenkool
2019-12-29 1:45 ` Julien "FrnchFrgg" Rivaud
2019-12-29 10:41 ` Segher Boessenkool
2019-12-29 11:02 ` Richard Biener
2019-12-29 11:47 ` Julien '_FrnchFrgg_' RIVAUD
2019-12-29 13:31 ` Segher Boessenkool
2019-12-29 13:51 ` Julien '_FrnchFrgg_' RIVAUD
2019-12-29 12:15 ` Segher Boessenkool
2019-12-29 16:32 ` Richard Earnshaw
2019-12-29 16:37 ` Julien '_FrnchFrgg_' RIVAUD
2019-12-29 11:42 ` Julien '_FrnchFrgg_' RIVAUD
2019-12-29 13:26 ` Segher Boessenkool
2019-12-29 13:48 ` Julien '_FrnchFrgg_' RIVAUD
2019-12-29 15:01 ` Segher Boessenkool
2019-12-29 17:31 ` Ian Lance Taylor via gcc
2019-12-30 0:31 ` Julien "FrnchFrgg" Rivaud
2019-12-29 21:31 ` Thomas Koenig
2019-12-29 23:57 ` Jeff Law
2019-12-27 13:29 ` Segher Boessenkool
2019-12-26 20:31 ` Richard Biener
2019-12-27 1:32 ` Joseph Myers
2019-12-27 10:14 ` Maxim Kuvyrkov
2019-12-28 1:55 ` Eric S. Raymond
2019-12-29 18:31 ` Maxim Kuvyrkov
2019-12-29 18:55 ` Joseph Myers
2019-12-29 22:47 ` Eric S. Raymond
2019-12-29 23:00 ` Joseph Myers [this message]
2019-12-29 23:13 ` Segher Boessenkool
2019-12-30 15:36 ` Richard Earnshaw (lists)
2019-12-30 22:37 ` Segher Boessenkool
2019-12-30 22:58 ` Joseph Myers
2019-12-31 0:23 ` Segher Boessenkool
2019-12-31 12:48 ` Segher Boessenkool
2019-12-31 3:09 ` Eric S. Raymond
2019-12-29 22:24 ` Richard Earnshaw (lists)
2019-12-30 0:18 ` Joseph Myers
2019-12-30 0:44 ` Julien "FrnchFrgg" Rivaud
2019-12-30 12:39 ` Maxim Kuvyrkov
2019-12-30 13:01 ` Maxim Kuvyrkov
2019-12-30 15:31 ` Richard Earnshaw (lists)
2019-12-30 15:49 ` Maxim Kuvyrkov
2019-12-30 16:08 ` Richard Earnshaw (lists)
2020-01-02 2:59 ` Alexandre Oliva
2020-01-02 10:58 ` Richard Earnshaw (lists)
2020-01-08 20:46 ` Maxim Kuvyrkov
2020-01-08 22:11 ` Eric S. Raymond
2020-01-08 23:34 ` Joseph Myers
2020-01-09 2:38 ` Segher Boessenkool
2020-01-09 12:12 ` Richard Earnshaw (lists)
2020-01-09 14:01 ` Eric S. Raymond
2020-01-11 11:30 ` Segher Boessenkool
2020-01-10 7:33 ` Maxim Kuvyrkov
2020-01-10 9:49 ` Richard Earnshaw (lists)
2020-01-10 11:38 ` Richard Biener
2020-01-10 12:09 ` Iain Sandoe
2020-01-10 13:11 ` Joseph Myers
2020-01-10 12:53 ` Nathan Sidwell
2020-01-10 14:13 ` Martin Liška
2020-01-11 11:57 ` Segher Boessenkool
2020-01-11 11:52 ` Segher Boessenkool
2020-01-10 13:31 ` Bernd Schmidt
2020-01-10 15:27 ` Eric S. Raymond
2020-01-10 15:09 ` Maxim Kuvyrkov
2020-01-10 15:16 ` Joseph Myers
2020-01-10 15:33 ` Maxim Kuvyrkov
2020-01-11 7:04 ` Gerald Pfeifer
2020-01-09 5:07 ` Jeff Law
2020-01-09 12:30 ` Joseph Myers
2020-01-10 15:27 ` Joseph Myers
2020-01-11 7:06 ` Gerald Pfeifer
2020-01-14 8:21 ` Jeff Law
2019-12-26 22:33 ` Joseph Myers
2019-12-26 19:16 ` Eric S. Raymond
2019-12-26 20:08 ` Alexandre Oliva
2019-12-26 20:28 ` Joseph Myers
2019-12-27 12:06 ` Alexandre Oliva
2019-12-27 12:21 ` Joseph Myers
2019-12-28 2:33 ` Eric S. Raymond
2019-12-26 21:19 ` Eric S. Raymond
2019-12-25 12:10 ` Segher Boessenkool
2019-12-25 14:13 ` Joseph Myers
2019-12-29 16:47 ` Mark Wielaard
2019-12-29 22:42 ` Joseph Myers
2019-12-16 16:27 ` Eric S. Raymond
2019-12-16 16:47 ` Segher Boessenkool
2019-12-16 16:04 ` Jeff Law
2019-12-16 16:37 ` Eric S. Raymond
2019-12-16 16:47 ` Jeff Law
2019-12-31 13:43 ` Joseph Myers
2019-12-31 14:13 ` Richard Earnshaw (lists)
2019-12-31 17:26 ` Segher Boessenkool
2019-12-16 13:56 ` Joseph Myers
2019-12-16 14:17 ` Mark Wielaard
2019-12-16 16:29 ` Joseph Myers
2019-12-16 13:53 ` Joseph Myers
2019-12-16 16:39 ` Jeff Law
2019-12-16 17:57 ` Richard Biener
2019-12-16 16:55 ` Jeff Law
2019-12-16 17:08 ` Joseph Myers
2019-12-16 19:15 ` Eric S. Raymond
2019-12-16 21:59 ` Segher Boessenkool
2019-12-16 22:14 ` Jeff Law
2019-12-16 22:42 ` Segher Boessenkool
2019-12-16 23:26 ` Joseph Myers
2019-12-16 23:44 ` Eric S. Raymond
2019-12-18 18:07 ` Jeff Law
2019-12-18 18:24 ` Joseph Myers
2019-12-19 0:57 ` Eric S. Raymond
2019-12-18 19:50 ` Segher Boessenkool
2019-12-18 20:43 ` Jeff Law
2019-12-20 16:28 ` Segher Boessenkool
2019-12-19 2:34 ` Unix philosopy vs. poor semantic locality Eric S. Raymond
2019-12-19 3:16 ` Joseph Myers
2019-12-19 5:46 ` Eric S. Raymond
2019-12-19 0:46 ` Proposal for the transition timetable for the move to GIT Eric S. Raymond
2019-12-16 23:34 ` Eric S. Raymond
2019-12-16 23:18 ` Joseph Myers
2019-12-16 23:19 ` Eric S. Raymond
2019-12-18 17:27 ` Segher Boessenkool
2019-12-16 13:33 ` Segher Boessenkool
2019-09-19 17:04 ` Paul Koning
2019-10-25 14:02 ` Richard Earnshaw (lists)
2019-09-20 15:49 ` Jeff Law
2019-09-21 9:11 ` Segher Boessenkool
2019-09-21 9:39 ` Andreas Schwab
2019-09-21 9:51 ` Segher Boessenkool
2019-09-21 10:04 ` Andreas Schwab
2019-09-21 9:26 ` Segher Boessenkool
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