[PATCH v2 00/25] More flexibility in making shallow clones

This series brings three new options to shallow clone/fetch, to let you specify cut point by time, or by excluding some refs, or to let you extend shallow boundary by <N> commits.

The series is now complete. Changes since v1 [1]

 - smart http support
 - option names --not and --since are changed to --shallow-exclude
   and --shallow-since
 - fix the last patch per Eric's comments (the tests were totally
   broken but I didn't realize)

The meat starts since 14/25. Before that is just cleanups and stuff. Happy (shallowly) cloning!

[1] http://thread.gmane.org/gmane.comp.version-control.git/283110

Nguyễn Thái Ngọc Duy (25):
  remote-curl.c: convert fetch_git() to use argv_array
  transport-helper.c: refactor set_helper_option()
  transport-helper.c: do not send null option to remote helper
  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()
  upload-pack: use skip_prefix() instead of starts_with() when possible
  upload-pack: tighten number parsing at "deepen" lines
  upload-pack: move rev-list code out of check_non_tip()
  fetch-pack: use skip_prefix() instead of starts_with() when possible
  fetch-pack: use a common function for verbose printing
  fetch-pack: use a separate flag for fetch in deepening mode
  shallow.c: implement a generic shallow boundary finder based on rev-list
  upload-pack: add deepen-since to cut shallow repos based on time
  fetch: define shallow boundary with --shallow-since
  clone: define shallow clone boundary based on time with --shallow-since
  t5500, t5539: tests for shallow depth since a specific date
  refs: add expand_ref()
  upload-pack: support define shallow boundary by excluding revisions
  fetch: define shallow boundary with --shallow-exclude
  clone: define shallow clone boundary with --shallow-exclude
  t5500, t5539: tests for shallow depth excluding a ref
  upload-pack: make check_reachable_object() return unreachable list if asked
  fetch, upload-pack: --deepen=N extends shallow boundary by N commits

 Documentation/fetch-options.txt                   |  14 +
 Documentation/git-clone.txt                       |   8 +
 Documentation/git-fetch-pack.txt                  |  14 +
 Documentation/gitremote-helpers.txt               |  11 +
 Documentation/technical/pack-protocol.txt         |   4 +-
 Documentation/technical/protocol-capabilities.txt |  25 ++
 builtin/clone.c                                   |  32 ++-
 builtin/fetch-pack.c                              |  31 ++-
 builtin/fetch.c                                   |  41 ++-
 commit.h                                          |   2 +
 fetch-pack.c                                      | 128 +++++----
 fetch-pack.h                                      |   4 +
 object.h                                          |   2 +-
 refs.c                                            |   8 +-
 refs.h                                            |   1 +
 remote-curl.c                                     |  75 ++++--
 shallow.c                                         |  85 ++++++
 t/t5500-fetch-pack.sh                             |  67 +++++
 t/t5539-fetch-http-shallow.sh                     |  72 ++++++
 transport-helper.c                                |  71 +++--
 transport.c                                       |  11 +
 transport.h                                       |  14 +
 upload-pack.c                                     | 301 ++++++++++++++++------
 23 files changed, 832 insertions(+), 189 deletions(-)