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Re: [PATCH v3 05/19] update-ref.c: use the error string from _commit to print better message

From
Jonathan Nieder <jrnieder@gmail.com>
Date
Apr 25, 2014, 22:36 UTC
Message-ID
<20140425223620.GD9218@google.com>
In-Reply-To
<1398442494-23438-6-git-send-email-sahlberg@google.com>
Ronnie Sahlberg wrote:
> Call ref_transaction_commit with QUIET_ON_ERR and use the error string
> that is returned to print a better log message if/after the transaction
> fails.
Ah, so that's how the transition to a better API happens.  Makes sense.

(A mention of QUIET_ON_ERR in the patch that introduces the &err parameter could help, or feel free to ignore these comments, since it's all well by the end of the series.)

> Update the tests to reflect that the log message is now slightly different
>   fatal: update_ref failed: Cannot lock the ref 'some ref'
> versus from the previous
>   fatal: Cannot lock the ref 'some ref'

Makes sense as a demo of what the new code allows, but is this error message better? The use of 'git update-ref' is an implementation detail that the user doesn't need to know about.

I think I'd prefer the result of plain die("%s", err), even though that's a no-op.

[...]
> +++ b/builtin/update-ref.c
[...]
Show 9 quoted lines
> @@ -359,17 +360,18 @@ int cmd_update_ref(int argc, const char **argv, const char *prefix)
>  		die("Refusing to perform update with empty message.");
>  
>  	if (read_stdin) {
> -		int ret;
>  		transaction = ref_transaction_begin();
> -
> +		if (!transaction)
> +			die("failed to update refs");

This can't happen (xcalloc is defined to die() on malloc failure). If you want to protect against it anyway, die("BUG: ...")?

Thanks, Jonathan

Previous: Ronnie SahlbergNext: Ronnie Sahlberg
Message 11 of 48 in “Use ref transactions from most callers”
  1. 00/19 Use ref transactions from most callersRonnie Sahlberg, Apr 25, 2014
  2. 01/19 refs.c: constify the sha arguments for ref_transaction_create|delete|updateRonnie Sahlberg, Apr 25, 2014
  3. 02/19 refs.c: allow passing NULL to ref_transaction_freeRonnie Sahlberg, Apr 25, 2014
  4. 03/19 refs.c: make ref_transaction_commit return an error stringRonnie Sahlberg, Apr 25, 2014
  5. Jonathan NiederApr 25, 2014
  6. Ronnie SahlbergApr 28, 2014
  7. 04/19 refs.c: return error string from ref_update_reject_duplicates on failureRonnie Sahlberg, Apr 25, 2014
  8. Jonathan NiederApr 25, 2014
  9. Ronnie SahlbergApr 28, 2014
  10. 05/19 update-ref.c: use the error string from _commit to print better messageRonnie Sahlberg, Apr 25, 2014
  11. Jonathan NiederApr 25, 2014
  12. Ronnie SahlbergApr 28, 2014
  13. 06/19 refs.c: make update_ref_write to return error string on failureRonnie Sahlberg, Apr 25, 2014
  14. Jonathan NiederApr 25, 2014
  15. Ronnie SahlbergApr 28, 2014
  16. 07/19 refs.c: remove the onerr argument to ref_transaction_commitRonnie Sahlberg, Apr 25, 2014
  17. Jonathan NiederApr 25, 2014
  18. Ronnie SahlbergApr 28, 2014
  19. 08/19 refs.c: change ref_transaction_update() to do error checking and return statusRonnie Sahlberg, Apr 25, 2014
  20. 09/19 refs.c: change ref_transaction_create to do error checking and return statusRonnie Sahlberg, Apr 25, 2014
  21. 10/19 refs.c: ref_transaction_delete to check for error and return statusRonnie Sahlberg, Apr 25, 2014
  22. 11/19 tag.c: use ref transactions when doing updatesRonnie Sahlberg, Apr 25, 2014
  23. Michael HaggertyApr 25, 2014
  24. Ronnie SahlbergApr 28, 2014
  25. 12/19 replace.c: use the ref transaction functions for updatesRonnie Sahlberg, Apr 25, 2014
  26. Michael HaggertyApr 25, 2014
  27. Ronnie SahlbergApr 28, 2014
  28. 13/19 commit.c: use ref transactions for updatesRonnie Sahlberg, Apr 25, 2014
  29. 14/19 sequencer.c: use ref transactions for all ref updatesRonnie Sahlberg, Apr 25, 2014
  30. 15/19 fast-import.c: change update_branch to use ref transactionsRonnie Sahlberg, Apr 25, 2014
  31. 16/19 branch.c: use ref transaction for all ref updatesRonnie Sahlberg, Apr 25, 2014
  32. Michael HaggertyApr 25, 2014
  33. Ronnie SahlbergApr 28, 2014
  34. Michael HaggertyApr 29, 2014
  35. Ronnie SahlbergApr 29, 2014
  36. Junio C HamanoApr 29, 2014
  37. 17/19 refs.c: change update_ref to use a transactionRonnie Sahlberg, Apr 25, 2014
  38. Michael HaggertyApr 25, 2014
  39. Ronnie SahlbergApr 28, 2014
  40. 18/19 refs.c: free the transaction before returning when number of updates is 0Ronnie Sahlberg, Apr 25, 2014
  41. 19/19 refs.c: pass **transaction to commit and have it clear the pointerRonnie Sahlberg, Apr 25, 2014
  42. Michael HaggertyApr 26, 2014
  43. Ronnie SahlbergApr 28, 2014
  44. Michael HaggertyApr 29, 2014
  45. Ronnie SahlbergApr 29, 2014
  46. Michael HaggertyApr 30, 2014
  47. Jonathan NiederApr 25, 2014
  48. Ronnie SahlbergApr 25, 2014

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