[RFC PATCH 0/7] Unset the submodule URL in the superproject when no longer needed

This is available as

  git fetch //github.com/stefanbeller/git unsetsubmoduleurl
  
and was hinted at in
https://public-inbox.org/git/CAGZ79kYfoK9hfXM2-VMAZLPpqBOFQYKtyYuYJb8twzz6Oz5ymQ@mail.gmail.com/

  Originally we have had the url in the config, (a) that we can change
  the URLs after the "git submodule init" and "git submodule update"
  step that actually clones the submodule if not present and much more
  importantly (b) to know which submodule "was initialized/active".
  
  Now that we have the submodule.active or even
  submodule.<name>.active flags, we do not need (b) any more.
  So the URL turns into a useless piece of cruft that just is unneeded
  and might confuse the user.

Opinions?

Thanks, Stefan

Stefan Beller (7):
  t7410: update to new style
  builtin/submodule--helper: remove stray new line
  submodule: is_submodule_active to differentiate between new and old
    mode
  submodule sync: omit setting submodule URL in config if possible
  submodule--helper: factor out allocation of callback cookie
  submodule--helper, update_clone: store index to update_clone instead
    of ce
  builtin/submodule--helper: unset submodule url if possible

 builtin/submodule--helper.c      | 82 ++++++++++++++++++--------
 submodule.c                      |  5 +-
 submodule.h                      |  6 ++
 t/t5526-fetch-submodules.sh      |  2 +-
 t/t7406-submodule-update.sh      |  8 +++
 t/t7410-submodule-checkout-to.sh | 99 +++++++++++++++++++-------------
 6 files changed, 131 insertions(+), 71 deletions(-)