[PATCH v3 0/3] Teach fetch and pull to recursively fetch submodules

So here is the third iteration of the recursive fetch/pull series.

Changes since v2:

* The default now is to not recurse into submodules (also see "Still
  to do")

* The command line option has been renamed to "--recurse-submodules" as
  proposed at the GitTogether

* The config options are named "submodule.<name>.fetchRecurseSubmodules"
  and "fetch.recurseSubmodules" now

* Switched the order of the two patches adding the config options

Question:

* Should the "--submodule-prefix" option - which is only used internally
  now - be a hidden option to "git fetch"?

Still to do:

* Add a mode to only fetch those submodules where new recorded commits
  are fetched in the superproject (and maybe later even fetch only those
  commits in the submodule which are referenced in the superprojects
  fetch). This could be a sane default - especially for projects having
  lots of submodules - and could be enabled by using then to be added
  "--recurse-submodules=changed" and "fetch[.]recurseSubmodules=changed"
  options where the configuration uses other defaults (I'm not really
  convinced yet 'changed' is a very good name but couldn't come up with
  a better one yet. So suggestions for alternatives are very welcome :-)

* Boost performance by concurrently fetching submodules (after my first
  experiments this must be configurable, e.g. how many fetch commands
  to run at the same time, as some git servers barf on too many fetches
  run at the same time)

But nonetheless I think this patch series is ok for inclusion as it does not change default behavior and gives people the opportunity to play with recursive fetch/pull by enabling one of the introduced config options.

Jens Lehmann (3):
  fetch/pull: Add the --recurse-submodules option
  Add the 'fetch.recurseSubmodules' config setting
  Submodules: Add the "fetchRecurseSubmodules" config option

 Documentation/config.txt        |   12 +++
 Documentation/fetch-options.txt |   13 +++
 Documentation/gitmodules.txt    |    8 ++
 builtin/fetch.c                 |   64 ++++++++++---
 git-pull.sh                     |   10 ++-
 submodule.c                     |   98 +++++++++++++++++++-
 submodule.h                     |    5 +
 t/t5526-fetch-submodules.sh     |  195 +++++++++++++++++++++++++++++++++++++++
 8 files changed, 388 insertions(+), 17 deletions(-)
 create mode 100755 t/t5526-fetch-submodules.sh