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Re: [PATCH v2 1/2] Allow git-apply to ignore the hunk headers

From
Johannes Schindelin <johannes.schindelin@gmx.de>
Date
Jun 5, 2008, 23:36 UTC
Message-ID
<alpine.DEB.1.00.0806060030160.21190@racer>
In-Reply-To
<7v4p87zcv6.fsf@gitster.siamese.dyndns.org>
Hi,
On Thu, 5 Jun 2008, Junio C Hamano wrote:
Show 17 quoted lines
> Johannes Schindelin <Johannes.Schindelin@gmx.de> writes:
> 
> >> And the robustness issue I worry about the second point also applies to 
> >> a line that is "^-- $", especially if we were to make this available to 
> >> git-am.  Perhaps when the line begins with a '-', the logic could be 
> >> extra careful to detect the case where the line looks like the e-mail 
> >> signature separator and check one line beyond it to see if it does not 
> >> look anything like part of a diff (in which case you stop, without 
> >> considering the line you are currently looking at, "^-- $", a deletion 
> >> of "^- $", as part of the preimage context).
> >
> > Is this really an issue?  fixup_counts() is only called after a hunk 
> > header was read, and that should be well after any "^-- $".
> 
> Are you talking about "^-- $" or "^---$"?  Yes we are way past the 
> three-dash separator at this point, but e-mail signature separator 
> happens at the very end after the patch.
Oh yes, I was thinking about the "^---$".
Show 8 quoted lines
> You read a hunk header line "@@ -l,m +n,o @@", and start counting the 
> diff text because you do not trust m and o.  When you read the last hunk 
> in a patch e-mail, you may hit a e-mail signature separator, like what 
> is given by format-patch output at the end.  Mistaking that as an extra 
> preimage context to remove "^- $" is what I was worried about.
> 
> -- 
> I worry, therefore I am...
Nice signature...

I could check for garbage after a line that consists of exactly "^-- $" with something like this (on top of 1/2):

@@ -0,0 +0,0 @@
 	default:
-		return -1;
+		return len != 4 && memcmp(line - len, "-- \n", len);
 	}

Hmm?

However, this will not work if anybody has a signature starting with 
"@@ ", "+", " ", "-" or "diff "...

Ciao,
Dscho
-- 
Won't dorry, he bappy
Previous: Junio C HamanoNext: Paolo Bonzini
Message 31 of 39 in “Allow git-apply to fix up the line counts”
  1. 1/2 Allow git-apply to fix up the line countsJohannes Schindelin, Jun 5, 2008
  2. 2/2 git-add: introduce --edit (to edit the diff vs. the index)Johannes Schindelin, Jun 5, 2008
  3. Johannes SixtJun 5, 2008
  4. Johannes SchindelinJun 5, 2008
  5. Johannes SixtJun 5, 2008
  6. Johannes SchindelinJun 5, 2008
  7. Johannes SixtJun 5, 2008
  8. Johannes SchindelinJun 5, 2008
  9. Johannes SixtJun 5, 2008
  10. 0/2 git add --editJohannes Schindelin, Jun 5, 2008
  11. 1/2 Allow git-apply to ignore the hunk headersJohannes Schindelin, Jun 5, 2008
  12. Junio C HamanoJun 5, 2008
  13. Johannes SchindelinJun 5, 2008
  14. 0/2 git add --editJohannes Schindelin, Jun 5, 2008
  15. 1/2 Allow git-apply to ignore the hunk headers (AKA recountdiff)Johannes Schindelin, Jun 5, 2008
  16. Junio C HamanoJun 6, 2008
  17. Johannes SchindelinJun 6, 2008
  18. Junio C HamanoJun 6, 2008
  19. Junio C HamanoJun 6, 2008
  20. Johannes SchindelinJun 6, 2008
  21. Junio C HamanoJun 6, 2008
  22. Johannes SchindelinJun 6, 2008
  23. Govind SalinasJun 6, 2008
  24. Johannes SchindelinJun 6, 2008
  25. 2/2 git-add: introduce --edit (to edit the diff vs. the index)Johannes Schindelin, Jun 5, 2008
  26. Olivier MarinJun 6, 2008
  27. Johannes SchindelinJun 6, 2008
  28. Junio C HamanoJun 6, 2008
  29. Johannes SchindelinJun 6, 2008
  30. Junio C HamanoJun 5, 2008
  31. Johannes SchindelinJun 5, 2008
  32. Paolo BonziniJun 6, 2008
  33. Johannes SchindelinJun 6, 2008
  34. Sergei OrganovJun 6, 2008
  35. Johannes SchindelinJun 6, 2008
  36. Junio C HamanoJun 6, 2008
  37. 2/2 git-add: introduce --edit (to edit the diff vs. the index)Johannes Schindelin, Jun 5, 2008
  38. Pieter de BieJun 5, 2008
  39. Junio C HamanoJun 5, 2008

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