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Re: [RFH] GSoC 2015 application

From
Duy Nguyen <pclouds@gmail.com>
Date
Mar 6, 2015, 11:24 UTC
Message-ID
<20150306112434.GA10703@lanh>
In-Reply-To
<xmqqsidk3r17.fsf@gitster.dls.corp.google.com>
On Wed, Mar 04, 2015 at 10:19:16PM -0800, Junio C Hamano wrote:
> But we would need some way to say a set-based cut-off; I do not
> think using --since for that purpose is a good idea, though, because
> that is already taken for date-based cut-off, and mixing them
> together will introduce confusion.

I agree. Although I look at this from the implementation perspective: mixing the two would make it really hard to detect which is which. Speaking of implementation..

On Thu, Mar 5, 2015 at 5:28 PM, Nguyễn Thái Ngọc Duy <pclouds@gmail.com> wrote:
Show 6 quoted lines
> I do have plenty of topics to finish up. But I wanted to see how this
> feature would look like. I needed to write some code for that and for
> straightening my thoughts. Totally untested, but I think it looks cool :)
>
> I think this feature is feasible. The protocol and UI are still up in
> the air. Plenty of work for any student who wants to pick this up.

I think students are losing the chance to have this fun now. A rough implementation is available at

    https://github.com/pclouds/git/tree/shallow-since

if anybody wants to try out. I don't post it here yet because while it seems to be working in my limited tests, there could be some corner cases to sort out, bugs and style violations. Also tests to be added.

Documentation changes below. --not and --since can be mixed. Neither of them can be used with --depth though, but I'd consider it a temporary limitation.

diff --git a/Documentation/fetch-options.txt b/Documentation/fetch-options.txt
index b09a783..ec68374 100644
--- a/Documentation/fetch-options.txt
+++ b/Documentation/fetch-options.txt
@@ -13,6 +13,15 @@
 	to the specified number of commits from the tip of each remote
 	branch history. Tags for the deepened commits are not fetched.
 
+--since=<date>::
+	Deepen or shorten the history of a 'shallow' repository to
+	include all reachable commits that are after <date>.
+
+--not=<revision>::
+	Deepen or shorten the history of a 'shallow' repository to
+	exclude commits reachable from a specified remote branch or tag.
+	This option can be specified multiple times.
+
 --unshallow::
 	If the source repository is complete, convert a shallow
 	repository to a complete one, removing all the limitations
diff --git a/Documentation/git-clone.txt b/Documentation/git-clone.txt
index f1f2a3f..fc094c6 100644
--- a/Documentation/git-clone.txt
+++ b/Documentation/git-clone.txt
@@ -187,6 +187,14 @@ objects from the source repository into a pack in the cloned repository.
 	Create a 'shallow' clone with a history truncated to the
 	specified number of revisions.
 
+--since=<date>::
+	Create a 'shallow' clone with a history after the specified time.
+
+--not=<revision>::
+	Create a 'shallow' clone with a history, excluding commits
+	reachable from a specified remote branch or tag.  This option
+	can be specified multiple times.
+
 --[no-]single-branch::
 	Clone only the history leading to the tip of a single branch,
 	either specified by the `--branch` option or the primary
diff --git a/Documentation/technical/protocol-capabilities.txt b/Documentation/technical/protocol-capabilities.txt
index 4f8a7bf..3649301 100644
--- a/Documentation/technical/protocol-capabilities.txt
+++ b/Documentation/technical/protocol-capabilities.txt
@@ -179,6 +179,24 @@ This capability adds "deepen", "shallow" and "unshallow" commands to
 the  fetch-pack/upload-pack protocol so clients can request shallow
 clones.
 
+deepen-since
+------------
+
+This capability adds "deepen-since" command to fetch-pack/upload-pack
+protocol so the client can request shallow clones that are cut at a
+specific time, instead of depth. Internally it's equivalent of doing
+"rev-list --since=<time>" on the server side. "deepen-since" cannot be
+used with "deepen".
+
+deepen-not
+----------
+
+This capability adds "deepen-not" command to fetch-pack/upload-pack
+protocol so the client can request shallow clones that are cut at a
+specific revision, instead of depth. Internally it's equivalent of
+doing "rev-list --not <rev>" on the server side. "deepen-not"
+cannot be used with "deepen", but can be used with "deepen-since".
+
 no-progress
 -----------
Previous: Junio C HamanoNext: Duy Nguyen
Message 63 of 74 in “[RFH] GSoC 2015 application”
  1. Jeff KingFeb 18, 2015
  2. Jeff KingFeb 18, 2015
  3. Johannes SchindelinFeb 24, 2015
  4. Jeff KingFeb 24, 2015
  5. Johannes SchindelinFeb 24, 2015
  6. Jeff KingFeb 24, 2015
  7. Johannes SchindelinFeb 25, 2015
  8. Matthieu MoyFeb 25, 2015
  9. Matthieu MoyFeb 25, 2015
  10. Johannes SchindelinFeb 25, 2015
  11. Matthieu MoyFeb 24, 2015
  12. Junio C HamanoFeb 24, 2015
  13. Johannes SchindelinFeb 24, 2015
  14. Junio C HamanoFeb 24, 2015
  15. Matthieu MoyFeb 24, 2015
  16. Stefan BellerFeb 25, 2015
  17. Michael J GruberFeb 25, 2015
  18. Johannes SchindelinFeb 25, 2015
  19. Christian CouderFeb 25, 2015
  20. Duy NguyenFeb 25, 2015
  21. Johannes SchindelinFeb 25, 2015
  22. Junio C HamanoFeb 18, 2015
  23. Junio C HamanoFeb 19, 2015
  24. Matthieu MoyFeb 19, 2015
  25. Jeff KingFeb 20, 2015
  26. Matthieu MoyFeb 20, 2015
  27. Dennis KaarsemakerFeb 20, 2015
  28. Matthieu MoyFeb 20, 2015
  29. Eric SunshineFeb 20, 2015
  30. 1/3 microprojects: tweaks after discussion with PeffMatthieu Moy, Feb 20, 2015
  31. 2/3 GSoC ideas: git bisect fixed/unfixedMatthieu Moy, Feb 20, 2015
  32. 3/3 idea: Be nicer to the user on tracked/untracked merge conflictsMatthieu Moy, Feb 20, 2015
  33. Duy NguyenFeb 20, 2015
  34. Jeff KingFeb 20, 2015
  35. Junio C HamanoFeb 20, 2015
  36. Support customized reordering in version sortDuy Nguyen, Feb 21, 2015
  37. Junio C HamanoFeb 21, 2015
  38. Duy NguyenFeb 21, 2015
  39. Junio C HamanoFeb 21, 2015
  40. Junio C HamanoFeb 21, 2015
  41. versionsort: support reorder prerelease suffixesNguyễn Thái Ngọc Duy, Feb 26, 2015
  42. Junio C HamanoFeb 27, 2015
  43. Junio C HamanoMar 5, 2015
  44. Duy NguyenMar 9, 2015
  45. Junio C HamanoMar 10, 2015
  46. Eric SunshineMar 10, 2015
  47. config.txt: update versioncmp.prereleaseSuffixNguyễn Thái Ngọc Duy, Mar 10, 2015
  48. Michael HaggertyFeb 20, 2015
  49. Jeff KingFeb 20, 2015
  50. Junio C HamanoFeb 20, 2015
  51. Matthieu MoyFeb 20, 2015
  52. Jeff KingFeb 20, 2015
  53. Jeff KingFeb 20, 2015
  54. Matthieu MoyFeb 23, 2015
  55. Jeff KingFeb 23, 2015
  56. Philip OakleyMar 4, 2015
  57. Stefan BellerMar 4, 2015
  58. Philip OakleyMar 4, 2015
  59. Junio C HamanoMar 5, 2015
  60. Stefan BellerMar 5, 2015
  61. Junio C HamanoMar 5, 2015
  62. Junio C HamanoMar 5, 2015
  63. Duy NguyenMar 6, 2015
  64. Duy NguyenMar 5, 2015
  65. Nguyễn Thái Ngọc DuyMar 5, 2015
  66. 1/6 upload-pack: move shallow deepen code out of receive_needs()Nguyễn Thái Ngọc Duy, Mar 5, 2015
  67. 2/6 upload-pack: move "shallow" sending code out of deepen()Nguyễn Thái Ngọc Duy, Mar 5, 2015
  68. 3/6 upload-pack: remove unused variable "backup"Nguyễn Thái Ngọc Duy, Mar 5, 2015
  69. 4/6 upload-pack: move "unshallow" sending code out of deepen()Nguyễn Thái Ngọc Duy, Mar 5, 2015
  70. 5/6 shallow.c: implement a generic shallow boundary finder based on rev-listNguyễn Thái Ngọc Duy, Mar 5, 2015
  71. 6/6 upload-pack: example code to use get_shallow_commits_by_rev_listNguyễn Thái Ngọc Duy, Mar 5, 2015
  72. Duy NguyenFeb 26, 2015
  73. Jeff KingMar 4, 2015
  74. Duy NguyenMar 4, 2015

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