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Re: [RFC 00/11] Foreign VCS helper program for CVS repositories

From
Johan Herland <johan@herland.net>
Date
Jul 27, 2009, 18:11 UTC
Message-ID
<200907272011.19430.johan@herland.net>
In-Reply-To
<alpine.LNX.2.00.0907271251280.2147@iabervon.org>
On Monday 27 July 2009, Daniel Barkalow wrote:
Show 19 quoted lines
> On Mon, 27 Jul 2009, Johan Herland wrote:
> > This series is a first draft towards implementing a foreign VCS
> > helper program for CVS.
> >
> > It is based on the 'db/foreign-scm' and 'jh/notes' topics in 'pu'.
> > As such, this patch series should apply cleanly to current 'pu'.
> >
> > The first 4 patches supply the necessary parts of Daniel Barkalow's
> > foreign-scm topic that has not yet been merged to 'pu' (i.e.
> > everything remaining in Daniel's original patch series, except the
> > p4-specific stuff).
>
> I've got some changes to this series in the works; I just made a few
> changes to share the transport-side code for interacting with the
> helper with the transport-side code for interacting with
> native-object helpers. Mainly, this means starting each line in the
> "list" response with "?" to indicate that you don't know the hash,
> since the protocol is trying to be compatible with cases where you do
> know.

No problem. I'm actually considering whether I should rewrite the CVS helper to a full-fledged git-shim (btw, thanks for the shim work; it looks really promising). I would still probably have to use git-fast-import, but I would have more control over the fast-import process (e.g. by closing the fast-import process myself, I could simplify the code maintaining the marks database).

With the git-shim feature already having found an excellent use case (the HTTP fetcher), how do you see the future for the foreign-scm topic? I like the idea of rewriting foreign-scm on top of git-shim, but is there anything substantial _left_ in foreign-scm after such a rewrite?

Show 6 quoted lines
> > Next, there are 3 patches tweaking and expanding the git-vcs API
> > (with corresponding implementations in the foreign transport code)
> > to adjust for the CVS helper's needs.
>
> These make sense to me. I assume you're planning to support exporting
> in some ways, but haven't got it working yet?

Indeed. The current version is only a first draft that fetches successfully from simple toy repositories (but probably not many real-world CVS repos). I hope to support both fetching and pushing to real-world CVS repos at some point.

Have fun! :)
...Johan
-- 
Johan Herland, <johan@herland.net>
www.herland.net
Previous: Daniel BarkalowNext: Daniel Barkalow
Message 29 of 30 in “[RFC 00/11] Foreign VCS helper program for CVS repositories”
  1. Johan HerlandJul 27, 2009
  2. 01/11 Add specification of git-vcs-* helper programsJohan Herland, Jul 27, 2009
  3. 02/11 Use a function to determine whether a remote is validJohan Herland, Jul 27, 2009
  4. 03/11 Allow programs to not depend on remotes having urlsJohan Herland, Jul 27, 2009
  5. Junio C HamanoJul 27, 2009
  6. Daniel BarkalowJul 27, 2009
  7. Alex RiesenJul 29, 2009
  8. Johan HerlandJul 30, 2009
  9. 04/11 Add a transport implementation using git-vcs-* helpersJohan Herland, Jul 27, 2009
  10. 05/11 Refactor path name parsing into new function: get_path_str()Johan Herland, Jul 27, 2009
  11. 06/11 Add support for mark references as path namesJohan Herland, Jul 27, 2009
  12. Shawn O. PearceJul 27, 2009
  13. Johan HerlandJul 27, 2009
  14. Shawn O. PearceJul 27, 2009
  15. 06/11 fast-import: Add support for importing commit notesJohan Herland, Jul 28, 2009
  16. Junio C HamanoJul 29, 2009
  17. Johan HerlandJul 29, 2009
  18. Shawn O. PearceJul 29, 2009
  19. Junio C HamanoJul 29, 2009
  20. Johan HerlandJul 30, 2009
  21. Junio C HamanoJul 30, 2009
  22. Junio C HamanoJul 29, 2009
  23. Johan HerlandJul 29, 2009
  24. 07/11 Preliminary clarifications to git-vcs documentationJohan Herland, Jul 27, 2009
  25. 08/11 Teach foreign transport code to perform the "capabilities" commandJohan Herland, Jul 27, 2009
  26. 09/11 Introduce a 'marks <filename>' feature to the foreign transport codeJohan Herland, Jul 27, 2009
  27. 11/11 Add simple test cases of git-vcs-cvs functionalityJohan Herland, Jul 27, 2009
  28. Daniel BarkalowJul 27, 2009
  29. Johan HerlandJul 27, 2009
  30. Daniel BarkalowJul 27, 2009

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