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From: "Eric S. Raymond" <esr@thyrsus.com>
To: "Jakub Narębski" <jnareb@gmail.com>
Cc: Martin Langhoff <martin.langhoff@gmail.com>,
	Git Mailing List <git@vger.kernel.org>
Subject: Re: I have end-of-lifed cvsps
Date: Tue, 17 Dec 2013 19:21:22 -0500	[thread overview]
Message-ID: <20131218002122.GA20152@thyrsus.com> (raw)
In-Reply-To: <CANQwDwdQZGhR=hhFHe7wRAeNej_F5fHspN7+f-LiJu06utwC-w@mail.gmail.com>

Jakub Narębski <jnareb@gmail.com>:
> > No, cvs-fast-export does not have --export-marks. It doesn't generate the
> > SHA1s that would require. Even if it did, it's not clear how that would help.
> 
> I was thinking about how the following part of git-fast-export
> `--import-marks=<file>`
> 
>   Any commits that have already been marked will not be exported again.
>   If the backend uses a similar --import-marks file, this allows for incremental
>   bidirectional exporting of the repository by keeping the marks the same
>   across runs.

I understand that. But it's not relevant - cvs-fast-import doesn't know about
git SHA1s, and cannot.
 
> How cvs-fast-export know where to start exporting from in incremental mode?

You give it a cutoff date. This is the same way cvsps-2.x and 3.x worked,
and it's what the cvsimport wrapper expects to pass down.

> BTW. does cvs-fast-export support incremental *output*, or does it
> perform also incremental *work*?

As I tried to explain previously in my response to John Herland, it's
incremental output only.  There is *no* CVS exporter known to me, or
him, that supports incremental work.  That would be at best be impractically
difficult; given CVS's limitations it may be actually impossible. I wouldn't
bet against impossible.

> Anyway, that might mean that generic fast-import stream based incremental
> (i.e. supporting proper thin fetch) remote helper is out of question, perhaps
> writing one for cvs / cvs-fe would bring incremental import from CVS to
> git?

Sorry, I don't understand that.
-- 
		<a href="http://www.catb.org/~esr/">Eric S. Raymond</a>

  reply	other threads:[~2013-12-18  0:21 UTC|newest]

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-12-12  0:17 I have end-of-lifed cvsps Eric S. Raymond
2013-12-12  3:38 ` Martin Langhoff
2013-12-12  4:26   ` Eric S. Raymond
2013-12-12 13:42     ` Martin Langhoff
2013-12-12 17:17       ` Andreas Krey
2013-12-12 17:26         ` Martin Langhoff
2013-12-12 18:35           ` Eric S. Raymond
2013-12-12 18:29         ` Eric S. Raymond
2013-12-12 19:08           ` Martin Langhoff
2013-12-12 19:39             ` Eric S. Raymond
2013-12-12 19:48               ` Martin Langhoff
2013-12-12 20:58                 ` Eric S. Raymond
2013-12-12 22:51                   ` Martin Langhoff
2013-12-12 23:04                     ` Eric S. Raymond
2013-12-13  2:35                       ` Martin Langhoff
2013-12-13  3:38                         ` Eric S. Raymond
2013-12-12 18:15       ` Eric S. Raymond
2013-12-12 18:53         ` Martin Langhoff
2013-12-17 10:57       ` Jakub Narębski
2013-12-17 11:18         ` Johan Herland
2013-12-17 14:58           ` Eric S. Raymond
2013-12-17 17:52             ` Johan Herland
2013-12-17 18:47               ` Eric S. Raymond
2013-12-17 21:26                 ` Johan Herland
2013-12-17 22:41                   ` Eric S. Raymond
2013-12-18 23:44                 ` Michael Haggerty
2013-12-19  1:11                   ` Johan Herland
2013-12-19  9:31                     ` Michael Haggerty
2013-12-19 15:26                       ` Johan Herland
2013-12-19 16:18                         ` Michael Haggerty
2013-12-19  4:06                   ` Eric S. Raymond
2013-12-19  9:43                     ` Michael Haggerty
2013-12-17 14:07         ` Eric S. Raymond
2013-12-17 19:58           ` Jakub Narębski
2013-12-17 21:02             ` Eric S. Raymond
2013-12-18  0:02               ` Jakub Narębski
2013-12-18  0:21                 ` Eric S. Raymond [this message]
2013-12-18 15:39                   ` Jakub Narębski
2013-12-18 16:23                     ` incremental fast-import and marks (Re: I have end-of-lifed cvsps) Jonathan Nieder
2013-12-18 16:27                     ` I have end-of-lifed cvsps Eric S. Raymond
2013-12-18 16:53                       ` Martin Langhoff
2013-12-18 19:54                         ` John Keeping
2013-12-18 20:20                           ` Eric S. Raymond
2013-12-18 20:47                             ` Kent R. Spillner
2013-12-18 17:46                       ` Jeff King
2013-12-18 19:16                         ` Eric S. Raymond
2013-12-18  0:04               ` Andreas Schwab
2013-12-18  0:25                 ` Eric S. Raymond

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