git/list[1] front-page[2] threads[3] people[4] search[5] about
 

Re: [PATCH 3/3] Add filter-objects command

From
Junio C Hamano <gitster@pobox.com>
Date
Jun 19, 2015, 18:28 UTC
Message-ID
<xmqqsi9n8sef.fsf@gitster.dls.corp.google.com>
In-Reply-To
<20150619105210.GA29755@peff.net>
Jeff King <peff@peff.net> writes:
Show 7 quoted lines
> Right, my point was only that it works for _your_ particular
> filter, but it would be nice to have something more general. And
> we already have "cat-file --batch-check". IOW, I think I would
> prefer the "magical" form because it's a better scripting building
> block. As you note, "filter-objects" without any filters is
> exactly that. Your 10 extra lines of C code are not exactly bloat,
> but I just wonder if other people will find it all that useful.

Yup. I do not mind a fast "enumerate all objects" but I suspect that making "all" fast may turn out to be not so great a trade-off after all, as you would need more work on the "now we have all coming from our input, let's filter with this and that criteria" downstream in general cases. Graph-based filtering e.g. "Oops, here is our whole customer database committed by mistake--which branch should we rewrite to nuke?" inherently is much more costly to do in the downstream that essentially has to reconstruct the graph around interesting parts of the history, and is better done by "enumerate" phase spending time to do the actual graph traversal.

And "filter-anything" should not be the name for "enumerate" command that comes on the upstream of a pipe. You usually call what is downstream of a pipe "a filter".

Previous: Jeff KingNext: John Keeping
Message 17 of 51 in “Improvements to parse-options and a new filter-objects command”
  1. Charles BaileyJun 19, 2015
  2. 1/3 Correct test-parse-options to handle negative intsCharles Bailey, Jun 19, 2015
  3. Junio C HamanoJun 19, 2015
  4. 2/3 Move unsigned long option parsing out of pack-objects.cCharles Bailey, Jun 19, 2015
  5. Remi Galan AlfonsoJun 19, 2015
  6. Charles BaileyJun 19, 2015
  7. Junio C HamanoJun 19, 2015
  8. Junio C HamanoJun 19, 2015
  9. Jakub NarębskiJun 20, 2015
  10. Jakub NarębskiJun 19, 2015
  11. Charles BaileyJun 20, 2015
  12. Junio C HamanoJun 20, 2015
  13. 3/3 Add filter-objects commandCharles Bailey, Jun 19, 2015
  14. Jeff KingJun 19, 2015
  15. Charles BaileyJun 19, 2015
  16. Jeff KingJun 19, 2015
  17. Junio C HamanoJun 19, 2015
  18. John KeepingJun 19, 2015
  19. Charles BaileyJun 19, 2015
  20. Improvements to integer option parsingCharles Bailey, Jun 21, 2015
  21. 1/2 Correct test-parse-options to handle negative intsCharles Bailey, Jun 21, 2015
  22. 2/2 Move unsigned long option parsing out of pack-objects.cCharles Bailey, Jun 21, 2015
  23. Charles BaileyJun 21, 2015
  24. Junio C HamanoJun 22, 2015
  25. Junio C HamanoJun 22, 2015
  26. Junio C HamanoJun 22, 2015
  27. Charles BaileyJun 22, 2015
  28. Fast enumeration of objectsCharles Bailey, Jun 21, 2015
  29. Add list-all-objects commandCharles Bailey, Jun 21, 2015
  30. Jeff KingJun 22, 2015
  31. Jeff KingJun 22, 2015
  32. 1/7 for_each_packed_object: automatically open pack indexJeff King, Jun 22, 2015
  33. 2/7 cat-file: minor style fix in options listJeff King, Jun 22, 2015
  34. 3/7 cat-file: move batch_options definition to top of fileJeff King, Jun 22, 2015
  35. 4/7 cat-file: add --buffer optionJeff King, Jun 22, 2015
  36. 5/7 cat-file: stop returning value from batch_one_objectJeff King, Jun 22, 2015
  37. 6/7 cat-file: split batch_one_object into two stagesJeff King, Jun 22, 2015
  38. 7/7 cat-file: add --batch-all-objects optionJeff King, Jun 22, 2015
  39. Eric SunshineJun 26, 2015
  40. Jeff KingJun 26, 2015
  41. 8/7 cat-file: sort and de-dup output of --batch-all-objectsJeff King, Jun 22, 2015
  42. Charles BaileyJun 22, 2015
  43. Jeff KingJun 22, 2015
  44. Charles BaileyJun 22, 2015
  45. Junio C HamanoJun 22, 2015
  46. Jeff KingJun 22, 2015
  47. Charles BaileyJun 22, 2015
  48. Duy NguyenJun 22, 2015
  49. Jeff KingJun 22, 2015
  50. Jeff KingJun 22, 2015
  51. Junio C HamanoJun 22, 2015

Read the whole thread, see it on lore, or plain text.

$ cat FOOTERMessages come from the public archive at lore.kernel.org/git, fetched every hour. The front page is chosen and written each morning by an AI editor and can be wrong; the threads themselves are the record. About and API. For agents: an MCP server at https://gitlist.dev/mcp, and any thread, story or person page as Markdown by adding .md to its URL (or sending Accept: text/markdown). Details in /llms.txt.