[PATCH v2 0/5] Add --no-ahead-behind to status

[Jeff Hostetler <git@jeffhostetler.com>]

From: Jeff Hostetler <jeffhost@microsoft.com>

This is version 2 of my patch series to avoid expensive
ahead/behind calculations in status.  This version addresses
Peff's comments on V1.

This version renames the command line parameter to have
positive sense "--ahead-behind" and avoids confusing double
negatives throughout.  It also changes the config setting
from "status." to "core." in anticipation of use by other
commands (like branch and checkout).

The output for porcelain status formats does change, but
ONLY if the "--no-ahead-behind" option is given on the
command line; porcelain formats DO NOT inherit the config
setting.  The intent here is that only scripts explicitly
requesting the new feature will see any format changes.

This idea was previously discussed in [1].  Working with the
enormous Windows repository, we found that 20+ seconds was being
spent in the ahead/behind computation when the current branch was
150K commits behind the upstream branch.  (Yes, this happens and
only took 3 weeks on the reporter's system.)


I've only modified "git status" in this patch series.  A similar
change could be added to "git branch -vv" and "git checkout" to
avoid delays there too.  I avoided doing it here to keep this
patch series focused.

[1] https://public-inbox.org/git/030bf57c-7a23-3391-4fc0-93efee791543@jeffhostetler.com/T/

Jeff Hostetler (5):
  core.aheadbehind: add new config setting
  stat_tracking_info: return +1 when branches are not equal
  status: add --[no-]ahead-behind to porcelain V2 output
  status: update short status to use --no-ahead-behind
  status: support --no-ahead-behind in long format

 Documentation/config.txt     |  8 ++++++
 Documentation/git-status.txt | 11 ++++++--
 builtin/checkout.c           |  2 +-
 builtin/commit.c             | 19 ++++++++++++++
 cache.h                      |  1 +
 config.c                     |  5 ++++
 environment.c                |  1 +
 ref-filter.c                 |  4 +--
 remote.c                     | 38 ++++++++++++++++++++--------
 remote.h                     | 10 ++++++--
 t/t6040-tracking-info.sh     | 42 +++++++++++++++++++++++++++++++
 t/t7064-wtstatus-pv2.sh      | 60 ++++++++++++++++++++++++++++++++++++++++++++
 wt-status.c                  | 34 +++++++++++++++++++------
 wt-status.h                  |  2 ++
 14 files changed, 212 insertions(+), 25 deletions(-)

-- 
2.9.3