Re: [PATCH 00/20] More flexibility in making shallow clones

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Nguyễn Thái Ngọc Duy  <pclouds@xxxxxxxxx> writes:

> This series brings three new options to shallow clone/fetch. --since
> lets you specify cut point by time. --not cuts by excluding specified
> refs. And --deepen=<N> extends shallow boundary in a more predictable
> way. Some of these were requested in the past.

Hmm, is this --deepen=<N> a response to the "--depth=<N> after too
long a time since the clone may even lose the originally acquired
history because the tip has advanced more than <N>"?  If that is so,
I guess it is a welcome change ;-)

> An important point of this series is it starts to use rev-list behind
> the scene to define shallow boundary, which opens doors to even more
> ways of cutting a repository.
>
> The series is good enough to look at but I don't think I have stared
> long enough to spot all the bugs. This mail is mostly about checking
> if the design (at both code and protocol levels) and the UI make
> sense. I'm thinking --since and --not may be too generic, but I don't
> see any better names, for example.
>
> Refactor/cleanup patches are sprinkled throughout (bad?). The meat is
> in 05, 09, 12, 13, 16, 17, 18 and 20.

Thanks.  As an initial "how about going in this direction?"
weatherbaloon, the order of changes are less important, but as the
topic gets closer to the final, it would be nicer to see preparatory
things done as, eh, preparatory steps ;-)

> HTTP support is not in this series (and I don't intend to do soon).
> The amount of filler code just to pass some info from UI down to the
> protocol seems too much, and it's even more so when HTTP support is
> added. But I don't see anyway around it. Maybe we can share some code
> between git-clone, git-fetch and git-fetch-pack, at least the argument
> parsing..
>
> Nguyễn Thái Ngọc Duy (20):
>   upload-pack: move shallow deepen code out of receive_needs()
>   upload-pack: move "shallow" sending code out of deepen()
>   upload-pack: remove unused variable "backup"
>   upload-pack: move "unshallow" sending code out of deepen()
>   shallow.c: implement a generic shallow boundary finder based on rev-list
>   upload-pack: glue code to use get_shallow_commits_by_rev_list
>   upload-pack: use skip_prefix() instead of starts_with() when possible
>   upload-pack: tighten number parsing at "deepen" lines
>   upload-pack: add deepen-since to cut shallow repos based on time
>   fetch-pack: use a common function for verbose printing
>   fetch-pack: use a separate flag for fetch in deepening mode
>   fetch: define shallow boundary with --since
>   clone: define shallow clone boundary based on time with --since
>   Add test_repo_expect_success for running tests in a new repository
>   t5500: test for shallow depth since a specific date
>   upload-pack: support define shallow boundary by excluding revisions
>   fetch: define shallow boundary with --not
>   clone: define shallow clone boundary with --not
>   t5500: test for shallow depth excluding a ref
>   fetch: add --deepen=<N> to extend shallow boundary by <N> commits
>
>  Documentation/fetch-options.txt                   |  14 ++
>  Documentation/git-clone.txt                       |   8 +
>  Documentation/technical/pack-protocol.txt         |   4 +-
>  Documentation/technical/protocol-capabilities.txt |  25 +++
>  builtin/clone.c                                   |  32 +++-
>  builtin/fetch.c                                   |  44 ++++-
>  commit.h                                          |   2 +
>  fetch-pack.c                                      | 128 ++++++++------
>  fetch-pack.h                                      |   4 +
>  shallow.c                                         |  92 ++++++++++
>  t/README                                          |  15 ++
>  t/t5500-fetch-pack.sh                             |  36 ++++
>  t/t5510-fetch.sh                                  |  12 ++
>  t/test-lib-functions.sh                           |  20 +++
>  transport.c                                       |  11 ++
>  transport.h                                       |  14 ++
>  upload-pack.c                                     | 206 ++++++++++++++++------
>  17 files changed, 550 insertions(+), 117 deletions(-)
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