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Re: [RFC] Re: Convert 'git blame' to parse_options()

From
Jeff King <peff@peff.net>
Date
Jun 23, 2008, 18:15 UTC
Message-ID
<20080623181517.GA28527@sigill.intra.peff.net>
In-Reply-To
<alpine.LFD.1.10.0806231027210.2926@woody.linux-foundation.org>
On Mon, Jun 23, 2008 at 10:32:21AM -0700, Linus Torvalds wrote:
Show 6 quoted lines
> > How can that be correct, if you don't know whether "-b" takes an
> > argument?
> 
> Did you read my post or not?
> 
> If you have that case, then use STOP_ON_UNKNOWN.

How do you know that is the case, unless you know what the other option parsers are going to do? Or are you suggesting that I check every other downstream option parser to make sure that it's OK in this particular instance, use IGNORE_UNKNOWN, and then laugh maniacally when somebody adds such an option to the diff option parser later?

> Umm. Helloo, reality.. There are actually very few options that take a 
> flag for their arguments. In particular, the option parsing we really 
> _care_ about (revision parsing - see builtin-blame.c which is exactly 
> where I wanted to convert things) very much DOES NOT.
Reality: revision.c, lines 1008-1012. "-n" takes an argument.
Reality: revision.c, lines 1075-1080. "--default" takes an argument.
> Try just looking at the code!

I did. Or maybe you missed the thread where this exact feature was mentioned, and I already looked at the code and mentioned those two spots. It's right here:

  http://thread.gmane.org/gmane.comp.version-control.git/85354/focus=85355
Show 6 quoted lines
> So I'm really not interested in arguing about "theoretical issues", when 
> we have a real-life *practical* issue to solve.
> 
> Solve builtin-blame.c for me. I sent out a patch yesterday, but in the 
> description of that patch I also described exactly why I want 
> CONTINUE_ON_UNKNOWN.

There is already a discussion underway about the proper solution. This isn't just a git-blame issue, but rather an issue with all commands that have their own options and take revision parameters. So I think rather than doing a halfway fix that happens to work with git-blame, it is more useful to focus on a solution that works everywhere and fix _all_ of the problems.

-Peff
Previous: Linus TorvaldsNext: Linus Torvalds
Message 13 of 82 in “Convert 'git blame' to parse_options()”
  1. Linus TorvaldsJun 23, 2008
  2. Junio C HamanoJun 23, 2008
  3. Johannes SchindelinJun 23, 2008
  4. [RFC] Re: Convert 'git blame' to parse_options()Pierre Habouzit, Jun 23, 2008
  5. Johannes SchindelinJun 23, 2008
  6. Pierre HabouzitJun 23, 2008
  7. Johannes SchindelinJun 23, 2008
  8. Linus TorvaldsJun 23, 2008
  9. Jeff KingJun 23, 2008
  10. Linus TorvaldsJun 23, 2008
  11. Jeff KingJun 23, 2008
  12. Linus TorvaldsJun 23, 2008
  13. Jeff KingJun 23, 2008
  14. Linus TorvaldsJun 23, 2008
  15. Linus TorvaldsJun 23, 2008
  16. Jeff KingJun 23, 2008
  17. Linus TorvaldsJun 23, 2008
  18. Linus TorvaldsJun 23, 2008
  19. Pierre HabouzitJun 23, 2008
  20. parse-opt: have parse_options_{start,end}.Pierre Habouzit, Jun 23, 2008
  21. parse-opt: Export a non NORETURN usage dumper.Pierre Habouzit, Jun 23, 2008
  22. parse-opt: create parse_options_step.Pierre Habouzit, Jun 23, 2008
  23. parse-opt: do not pring errors on unknown options, return -2 intead.Pierre Habouzit, Jun 23, 2008
  24. parse-opt: fake short strings for callers to believe in.Pierre Habouzit, Jun 23, 2008
  25. Junio C HamanoJun 23, 2008
  26. Pierre HabouzitJun 23, 2008
  27. Pierre HabouzitJun 23, 2008
  28. Junio C HamanoJun 23, 2008
  29. Pierre HabouzitJun 23, 2008
  30. Linus TorvaldsJun 23, 2008
  31. Linus TorvaldsJun 23, 2008
  32. Pierre HabouzitJun 23, 2008
  33. Junio C HamanoJun 23, 2008
  34. Pierre HabouzitJun 23, 2008
  35. Pierre HabouzitJun 23, 2008
  36. Junio C HamanoJun 23, 2008
  37. Pierre HabouzitJun 23, 2008
  38. Linus TorvaldsJun 23, 2008
  39. Junio C HamanoJun 23, 2008
  40. Pierre HabouzitJun 24, 2008
  41. Jeff KingJun 24, 2008
  42. Jeff KingJun 23, 2008
  43. Pierre HabouzitJun 23, 2008
  44. Linus TorvaldsJun 23, 2008
  45. Jeff KingJun 24, 2008
  46. Linus TorvaldsJun 24, 2008
  47. Johannes SchindelinJun 24, 2008
  48. Jeff KingJun 24, 2008
  49. Linus TorvaldsJun 24, 2008
  50. Jeff KingJun 24, 2008
  51. Junio C HamanoJun 24, 2008
  52. Pierre HabouzitJun 24, 2008
  53. Linus TorvaldsJun 24, 2008
  54. Pierre HabouzitJun 24, 2008
  55. Pierre HabouzitJun 24, 2008
  56. Johannes SixtJun 25, 2008
  57. Johannes SchindelinJun 23, 2008
  58. Linus TorvaldsJun 23, 2008
  59. Johannes SchindelinJun 23, 2008
  60. Jeff KingJun 23, 2008
  61. Johannes SchindelinJun 23, 2008
  62. Pierre HabouzitJun 23, 2008
  63. Linus TorvaldsJun 23, 2008
  64. Making parse-opt incremental, reworked seriesPierre Habouzit, Jun 24, 2008
  65. 1/7 parse-opt: have parse_options_{start,end}.Pierre Habouzit, Jun 24, 2008
  66. 2/7 parse-opt: Export a non NORETURN usage dumper.Pierre Habouzit, Jun 24, 2008
  67. 3/7 parse-opt: create parse_options_step.Pierre Habouzit, Jun 24, 2008
  68. 4/7 parse-opt: do not pring errors on unknown options, return -2 intead.Pierre Habouzit, Jun 24, 2008
  69. 5/7 parse-opt: fake short strings for callers to believe in.Pierre Habouzit, Jun 24, 2008
  70. 6/7 parse-opt: add PARSE_OPT_KEEP_ARGV0 parser option.Pierre Habouzit, Jun 24, 2008
  71. 7/7 Migrate git-blame to parse-option partially.Pierre Habouzit, Jun 24, 2008
  72. Pierre HabouzitJun 24, 2008
  73. Linus TorvaldsJun 24, 2008
  74. Pierre HabouzitJun 24, 2008
  75. Pierre HabouzitJun 24, 2008
  76. Linus TorvaldsJun 24, 2008
  77. Pierre HabouzitJun 24, 2008
  78. Andreas EricssonJun 25, 2008
  79. parse-opt: fake short strings for callers to believe in.Pierre Habouzit, Jun 24, 2008
  80. Pierre HabouzitJun 26, 2008
  81. Junio C HamanoJun 26, 2008
  82. Pierre HabouzitJun 26, 2008

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