git/contrib
Karsten Blees 81efcfc201 mingw: add a cache below mingw's lstat and dirent implementations
Checking the work tree status is quite slow on Windows, due to slow
`lstat()` emulation (git calls `lstat()` once for each file in the
index). Windows operating system APIs seem to be much better at scanning
the status of entire directories than checking single files.

Add an `lstat()` implementation that uses a cache for lstat data. Cache
misses read the entire parent directory and add it to the cache.
Subsequent `lstat()` calls for the same directory are served directly
from the cache.

Also implement `opendir()`/`readdir()`/`closedir()` so that they create
and use directory listings in the cache.

The cache doesn't track file system changes and doesn't plug into any
modifying file APIs, so it has to be explicitly enabled for git functions
that don't modify the working copy.

Note: in an earlier version of this patch, the cache was always active and
tracked file system changes via ReadDirectoryChangesW. However, this was
much more complex and had negative impact on the performance of modifying
git commands such as 'git checkout'.

Signed-off-by: Karsten Blees <blees@dcon.de>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
2024-04-29 21:47:35 +02:00
..
buildsystems mingw: add a cache below mingw's lstat and dirent implementations 2024-04-29 21:47:35 +02:00
coccinelle use xstrncmpz() 2024-02-12 09:32:41 -08:00
completion Merge branch 'vs/complete-with-set-u-fix' 2024-04-10 10:00:08 -07:00
contacts git-contacts: also recognise "Reported-by:" 2017-07-27 09:42:55 -07:00
credential osxkeychain: store new attributes 2024-04-01 15:38:20 -07:00
diff-highlight perl: bump the required Perl version to 5.8.1 from 5.8.0 2023-11-17 07:26:32 +09:00
emacs git{,-blame}.el: remove old bitrotting Emacs code 2018-04-16 17:25:49 +09:00
examples Merge branch 'bw/c-plus-plus' into ds/lazy-load-trees 2018-04-11 10:46:32 +09:00
fast-import import-tars: ignore the global PAX header 2020-03-24 14:39:47 -07:00
git-jump git-jump: admit to passing merge mode args to ls-files 2023-10-05 12:55:38 -07:00
git-shell-commands
hooks multimail: stop shipping a copy 2021-06-11 13:35:19 +09:00
long-running-filter docs: warn about possible '=' in clean/smudge filter process values 2016-12-06 11:29:52 -08:00
mw-to-git Merge branch 'tz/send-email-negatable-options' into maint-2.43 2024-02-08 16:22:01 -08:00
persistent-https docs/config: mention protocol implications of url.insteadOf 2017-06-01 10:07:10 +09:00
remote-helpers contrib: git-remote-{bzr,hg} placeholders don't need Python 2017-03-03 11:09:34 -08:00
stats contrib: update stats/mailmap script 2012-12-12 11:09:11 -08:00
subtree subtree: update `contrib/subtree` `test` target 2024-04-29 21:47:18 +02:00
thunderbird-patch-inline contrib/thunderbird-patch-inline/appp.sh: use the $( ... ) construct for command substitution 2015-12-27 15:33:13 -08:00
update-unicode unicode_width.h: rename to use dash in file name 2018-04-11 18:11:00 +09:00
vscode path: remove mksnpath() 2024-04-05 09:49:38 -07:00
workdir refs: introduce reftable backend 2024-02-07 08:28:37 -08:00
README doc: fix some typos, grammar and wording issues 2023-10-05 12:55:38 -07:00
coverage-diff.sh contrib/coverage-diff: avoid redundant pipelines 2024-03-16 11:08:57 -07:00
git-resurrect.sh contrib/git-resurrect.sh: use hash-agnostic OID pattern 2020-10-08 11:48:56 -07:00
remotes2config.sh
rerere-train.sh contrib/rerere-train: avoid useless gpg sign in training 2022-07-19 11:24:08 -07:00

README

Contributed Software

Although these pieces are available as part of the official git
source tree, they are in somewhat different status.  The
intention is to keep interesting tools around git here, maybe
even experimental ones, to give users an easier access to them,
and to give tools wider exposure, so that they can be improved
faster.

I am not expecting to touch these myself that much.  As far as
my day-to-day operation is concerned, these subdirectories are
owned by their respective primary authors.  I am willing to help
if users of these components and the contrib/ subtree "owners"
have technical/design issues to resolve, but the initiative to
fix and/or enhance things _must_ be on the side of the subtree
owners.  IOW, I won't be actively looking for bugs and rooms for
enhancements in them as the git maintainer -- I may only do so
just as one of the users when I want to scratch my own itch.  If
you have patches to things in contrib/ area, the patch should be
first sent to the primary author, and then the primary author
should ack and forward it to me (git pull request is nicer).
This is the same way as how I have been treating gitk, and to a
lesser degree various foreign SCM interfaces, so you know the
drill.

I expect things that start their life in the contrib/ area
to graduate out of contrib/ once they mature, either by becoming
projects on their own, or moving to the toplevel directory.  On
the other hand, I expect I'll be proposing removal of disused
and inactive ones from time to time.

If you have new things to add to this area, please first propose
it on the git mailing list, and after a list discussion proves
there is general interest (it does not have to be a
list-wide consensus for a tool targeted to a relatively narrow
audience -- for example I do not work with projects whose
upstream is svn, so I have no use for git-svn myself, but it is
of general interest for people who need to interoperate with SVN
repositories in a way git-svn works better than git-svnimport),
submit a patch to create a subdirectory of contrib/ and put your
stuff there.

-jc