Re: I have end-of-lifed cvsps

From: Eric S. Raymond <esr@thyrsus.com>
Date: Dec 12, 2013, 18:15 UTC
Message-ID: <20131212181513.GA16960@thyrsus.com>
In-Reply-To: <CACPiFC+bopf32cgDcQcVpL5vW=3KxmSP8Oh1see4KduQ1BNcPw@mail.gmail.com>

Martin Langhoff <martin.langhoff@gmail.com>:

Show 10 quoted lines

> On Wed, Dec 11, 2013 at 11:26 PM, Eric S. Raymond <esr@thyrsus.com> wrote:
> > You'll have to remind me what you mean by "incremental" here. Possibly
> > it's something cvs-fast-export could support.
> 
> User can
> 
>  - run a cvs to git import at time T, resulting in repo G
>  - make commits to cvs repo
>  - run cvs to git import at time T1, pointed to G, and the import tool
> will only add the new commits found in cvs between T and T1.

No, cvs-fast-export doesn't do that. However, it is fast enough that you can probably just rebuild the whole repo each time you want to move content.

When I did the conversion of groff recently I was getting rates of about 150 commits a second - and it will be faster now, because I found an expensive operation in the output stage I could optimize out.

Now that you have reminded me of this, I remember implementing a -i option for cvsps-3.0 that could be combined with a time restriction to output incremental dumps. It's likely I could do the same thing for cvs-fast-import.

Show 12 quoted lines

> The above examples assume that the CVS repos have used "flying fish"
> approach in the "interesting" (i.e.: recent) parts of their history.
> 
> [ Simplifying a bit for non-CVS-geeks -- flying fish is using CVS HEAD
> for your development, plus 'feature branches' that get landed, plus
> long-lived 'stable release' branches. Most CVS projects in modern
> times use flying fish, which is a lot like what the git project uses
> in its own repo, but tuned to CVS's strengths (interesting commits
> linearized in CVS HEAD).
> 
> Other approaches ('dovetail') tend to end up with unworkable messes
> given CVS's weaknesses. ]

That terminology -- "flying fish" and "dovetail" -- is interesting, and I have not heard it before. It might be woth putting in the Jargon File. Can you point me at examples of live usage?

-- 
		<a href="http://www.catb.org/~esr/">Eric S. Raymond</a>