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Re: [PATCH v3 9/9] update-ref: implement interactive transaction handling

From
Junio C Hamano <gitster@pobox.com>
Date
Apr 3, 2020, 17:33 UTC
Message-ID
<xmqqa73s1njt.fsf@gitster.c.googlers.com>
In-Reply-To
<fd4b874a-478f-2139-e910-c000b8a1f396@gmail.com>
Phillip Wood <phillip.wood123@gmail.com> writes:
Show 8 quoted lines
> I found the talk of "non-transactional" sessions a bit confusing
> because the normal --stdin does update all the refs it is given as a
> single transaction, so that if it cannot update one ref none of them
> are updated. If I've understood correctly these changes are about
> coordinating transactions across several repositories. I'm not sure
> how best to convey that in the man page - perhaps we could call them
> single repository transactions and multi repository transaction or
> something.

FWIW, I described the topic in my "What's cooking" report as adding an ingredient to implement two-phase commit-style atomic updates across multiple repositories. These "prepare to commit, now if you say 'yes I am ready', there is no taking it back", "now do the commit as you promised", and "Earlier I made you promise that you'd commit all when I tell you, but you no longer should commit" are good enough ingredients, but I am not so sure about the actual implementation in this topic (or it is really possible to make the promise "ok, now I can commit everything without lock conflicts if you tell me" with our ref API, which does not have "now freeze all refs in the repository---from now on until I say otherwise, no refs can be manipulated", in the first place).

Previous: Patrick SteinhardtNext: Junio C Hamano
Message 46 of 48 in “Support for transactions in `git-update-ref --stdin`”
  1. 0/9 Support for transactions in `git-update-ref --stdin`Patrick Steinhardt, Mar 25, 2020
  2. 1/9 refs: fix segfault when aborting empty transactionPatrick Steinhardt, Mar 25, 2020
  3. Junio C HamanoMar 27, 2020
  4. 2/9 git-update-ref.txt: add missing wordPatrick Steinhardt, Mar 25, 2020
  5. 3/9 strbuf: provide function to append whole linesPatrick Steinhardt, Mar 25, 2020
  6. Junio C HamanoMar 27, 2020
  7. Patrick SteinhardtMar 30, 2020
  8. Junio C HamanoMar 30, 2020
  9. 4/9 update-ref: organize commands in an arrayPatrick Steinhardt, Mar 25, 2020
  10. Junio C HamanoMar 27, 2020
  11. Patrick SteinhardtMar 30, 2020
  12. Junio C HamanoMar 30, 2020
  13. Patrick SteinhardtMar 30, 2020
  14. 5/9 update-ref: drop unused argument for `parse_refname`Patrick Steinhardt, Mar 25, 2020
  15. 6/9 update-ref: pass end pointer instead of strbufPatrick Steinhardt, Mar 25, 2020
  16. 7/9 update-ref: move transaction handling into `update_refs_stdin()`Patrick Steinhardt, Mar 25, 2020
  17. Junio C HamanoMar 27, 2020
  18. 8/9 update-ref: read commands in a line-wise fashionPatrick Steinhardt, Mar 25, 2020
  19. Junio C HamanoMar 27, 2020
  20. Patrick SteinhardtMar 30, 2020
  21. Junio C HamanoMar 30, 2020
  22. 9/9 update-ref: implement interactive transaction handlingPatrick Steinhardt, Mar 25, 2020
  23. Junio C HamanoMar 27, 2020
  24. 0/9 Support for transactions in `git-update-ref --stdin`Patrick Steinhardt, Mar 30, 2020
  25. 1/9 refs: fix segfault when aborting empty transactionPatrick Steinhardt, Mar 30, 2020
  26. 2/9 git-update-ref.txt: add missing wordPatrick Steinhardt, Mar 30, 2020
  27. 3/9 strbuf: provide function to append whole linesPatrick Steinhardt, Mar 30, 2020
  28. 4/9 update-ref: organize commands in an arrayPatrick Steinhardt, Mar 30, 2020
  29. 5/9 update-ref: drop unused argument for `parse_refname`Patrick Steinhardt, Mar 30, 2020
  30. 6/9 update-ref: pass end pointer instead of strbufPatrick Steinhardt, Mar 30, 2020
  31. 7/9 update-ref: move transaction handling into `update_refs_stdin()`Patrick Steinhardt, Mar 30, 2020
  32. 8/9 update-ref: read commands in a line-wise fashionPatrick Steinhardt, Mar 30, 2020
  33. 9/9 update-ref: implement interactive transaction handlingPatrick Steinhardt, Mar 30, 2020
  34. 0/9 Support for transactions in `git-update-ref --stdin`Patrick Steinhardt, Apr 2, 2020
  35. 1/9 refs: fix segfault when aborting empty transactionPatrick Steinhardt, Apr 2, 2020
  36. 2/9 git-update-ref.txt: add missing wordPatrick Steinhardt, Apr 2, 2020
  37. 3/9 strbuf: provide function to append whole linesPatrick Steinhardt, Apr 2, 2020
  38. 4/9 update-ref: organize commands in an arrayPatrick Steinhardt, Apr 2, 2020
  39. 5/9 update-ref: drop unused argument for `parse_refname`Patrick Steinhardt, Apr 2, 2020
  40. 6/9 update-ref: pass end pointer instead of strbufPatrick Steinhardt, Apr 2, 2020
  41. 7/9 update-ref: move transaction handling into `update_refs_stdin()`Patrick Steinhardt, Apr 2, 2020
  42. 8/9 update-ref: read commands in a line-wise fashionPatrick Steinhardt, Apr 2, 2020
  43. 9/9 update-ref: implement interactive transaction handlingPatrick Steinhardt, Apr 2, 2020
  44. Phillip WoodApr 3, 2020
  45. Patrick SteinhardtApr 3, 2020
  46. Junio C HamanoApr 3, 2020
  47. Junio C HamanoApr 3, 2020
  48. Patrick SteinhardtApr 6, 2020

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