[PATCHv6 0/8] Expose submodule parallelism to the user

This is a resend of sb/submodule-parallel-update and is available at github[1] as well.

What does it do? --- This series should finish the on going efforts of parallelizing submodule network traffic. The patches contain tests for clone, fetch and submodule update to use the actual parallelism both via command line as well as a configured option. I decided to go with "submodule.fetchJobs" for all three for now.

What changed to v5? --- No major changes, I just made it compile again as thr order of parameters to the parallel processing engine changed.

Thanks, Stefan

[1] https://github.com/stefanbeller/git/tree/submodule-parallel-update-2 which is on top of https://github.com/stefanbeller/git/tree/submodule-parallel-fetch-2 which I sent to the list about 3 hours ago.

Stefan Beller (8):
  submodule-config: keep update strategy around
  submodule-config: drop check against NULL
  submodule-config: remove name_and_item_from_var
  submodule-config: introduce parse_generic_submodule_config
  fetching submodules: respect `submodule.fetchJobs` config option
  git submodule update: have a dedicated helper for cloning
  submodule update: expose parallelism to the user
  clone: allow an explicit argument for parallel submodule clones

 Documentation/config.txt        |   7 ++
 Documentation/git-clone.txt     |   6 +-
 Documentation/git-submodule.txt |   7 +-
 builtin/clone.c                 |  19 +++-
 builtin/fetch.c                 |   2 +-
 builtin/submodule--helper.c     | 239 ++++++++++++++++++++++++++++++++++++++++
 git-submodule.sh                |  54 ++++-----
 submodule-config.c              | 109 +++++++++++-------
 submodule-config.h              |   3 +
 submodule.c                     |   5 +
 t/t5526-fetch-submodules.sh     |  14 +++
 t/t7400-submodule-basic.sh      |   4 +-
 t/t7406-submodule-update.sh     |  27 +++++
 13 files changed, 413 insertions(+), 83 deletions(-)