strchrnul() was introduced in glibc in April 1999 and included in
glibc-2.1. Checking for that version means the majority of all git
users would get to use the optimized version in glibc. Of the
remaining few some might get to use a slightly slower version
than necessary but probably not slower than what we have today.
Unfortunately, __GLIBC_PREREQ() macro was not available in glibc 2.1.1
which was short lived but already supported strchrnul(). Odd minority
users of that library needs to live with our compatibility inline version.
Rediffed-against-next-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
As Jeff King remarked, format strings with duplicate placeholders can
be slow to expand, because each instance is calculated anew.
This patch makes use of the fact that format_commit_message() and its
helper functions only ever add stuff to the end of the strbuf. For
certain expensive placeholders, store the offset and length of their
expansion with the strbuf at the first occurrence. Later they
expansion result can simply be copied from there -- no malloc() or
strdup() required.
These certain placeholders are the abbreviated commit, tree and
parent hashes, as the search for a unique abbreviated hash is quite
costly. Here are the times for next (best of three runs):
$ time git log --pretty=format:%h >/dev/null
real 0m0.611s
user 0m0.404s
sys 0m0.204s
$ time git log --pretty=format:%h%h%h%h >/dev/null
real 0m1.206s
user 0m0.744s
sys 0m0.452s
And here those with this patch (and the previous two); the speedup
of the single placeholder case is just noise:
$ time git log --pretty=format:%h >/dev/null
real 0m0.608s
user 0m0.416s
sys 0m0.192s
$ time git log --pretty=format:%h%h%h%h >/dev/null
real 0m0.639s
user 0m0.488s
sys 0m0.140s
Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Add a new function, strbuf_adddup(), that appends a duplicate of a
part of a struct strbuf to end of the latter.
Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
As Jeff King pointed out, some placeholder expansions are related to
each other: the steps to calculate one go most of the way towards
calculating the other, too.
This patch makes format_commit_message() parse the commit message
only once, remembering the position of each item. This speeds up
handling of format strings containing multiple placeholders from the
set %s, %a*, %c*, %e, %b.
Here are the timings for the git version in next. The first one is
to estimate the overhead of the caching, the second one is taken
from http://svn.tue.mpg.de/tentakel/trunk/tentakel/Makefile as an
example of a format string found in the wild. The times are the
fastest of three consecutive runs in each case:
$ time git log --pretty=format:%e >/dev/null
real 0m0.381s
user 0m0.340s
sys 0m0.024s
$ time git log --pretty=format:"* %cd %cn%n%n%s%n%b" >/dev/null
real 0m0.623s
user 0m0.556s
sys 0m0.052s
And here the times with this patch:
$ time git log --pretty=format:%e >/dev/null
real 0m0.385s
user 0m0.332s
sys 0m0.040s
$ time git log --pretty=format:"* %cd %cn%n%n%s%n%b" >/dev/null
real 0m0.563s
user 0m0.504s
sys 0m0.048s
Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Some of the --pretty=format placeholders expansions are expensive to
calculate. This is made worse by the current code's use of
interpolate(), which requires _all_ placeholders are to be prepared
up front.
One way to speed this up is to check which placeholders are present
in the format string and to prepare only the expansions that are
needed. That still leaves the allocation overhead of interpolate().
Another way is to use a callback based approach together with the
strbuf library to keep allocations to a minimum and avoid string
copies. That's what this patch does. It introduces a new strbuf
function, strbuf_expand().
The function takes a format string, list of placeholder strings,
a user supplied function 'fn', and an opaque pointer 'context'
to tell 'fn' what thingy to operate on.
The function 'fn' is expected to accept a strbuf, a parsed
placeholder string and the 'context' pointer, and append the
interpolated value for the 'context' thingy, according to the
format specified by the placeholder.
Thanks to Pierre Habouzit for his suggestion to use strchrnul() and
the code surrounding its callsite. And thanks to Junio for most of
this commit message. :)
Here my measurements of most of Paul Mackerras' test cases that
highlighted the performance problem (best of three runs):
(master)
$ time git log --pretty=oneline >/dev/null
real 0m0.390s
user 0m0.340s
sys 0m0.040s
(master)
$ time git log --pretty=raw >/dev/null
real 0m0.434s
user 0m0.408s
sys 0m0.016s
(master)
$ time git log --pretty="format:%H {%P} %ct" >/dev/null
real 0m1.347s
user 0m0.080s
sys 0m1.256s
(interp_find_active -- Dscho)
$ time ./git log --pretty="format:%H {%P} %ct" >/dev/null
real 0m0.694s
user 0m0.020s
sys 0m0.672s
(strbuf_expand -- this patch)
$ time ./git log --pretty="format:%H {%P} %ct" >/dev/null
real 0m0.395s
user 0m0.352s
sys 0m0.028s
Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
As suggested by Pierre Habouzit, add strchrnul(). It's a useful GNU
extension and can simplify string parser code. There are several
places in git that can be converted to strchrnul(); as a trivial
example, this patch introduces its usage to builtin-fetch--tool.c.
Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
* maint:
Start preparing for 1.5.3.6
git-send-email: Change the prompt for the subject of the initial message.
SubmittingPatches: improve the 'Patch:' section of the checklist
instaweb: Minor cleanups and fixes for potential problems
stop t1400 hiding errors in tests
Makefile: add missing dependency on wt-status.h
refresh_index_quietly(): express "optional" nature of index writing better
Fix sed string regex escaping in module_name.
Avoid a few unportable, needlessly nested "...`...".
git-mailsplit: with maildirs not only process cur/, but also new/
Signed-off-by: Junio C Hamano <gitster@pobox.com>
\n is not portable in a s/// replacement string, only
in the regex part. backslash-newline helps.
Signed-off-by: Ralf Wildenhues <Ralf.Wildenhues@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
I never understood what this prompt was asking for until I read the actual
source code. I think this wording is much more understandable.
Signed-off-by: Benoit Sigoure <tsuna@lrde.epita.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
There were 2 items "send patch to..." but having different set of
addresses to send patch to. Merge them together and move the resulting
item to the end of checklist.
Signed-off-by: Sergei Organov <osv@javad.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Fix path quoting and test of empty values that some shells do not like.
Remove duplicate check and setting of $browser.
Signed-off-by: Jonas Fonseca <fonseca@diku.dk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The last rm in the test was lacking an "&&" before it,
which caused the errors in the commands be silently hidden.
Signed-off-by: Alex Riesen <raa.lkml@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The point of the part of the code this patch touches is that if
we modified the active_cache, we try to write it out and make it
the index file for later users to use by calling
"commit_locked_index", but we do not really care about the
failure from this sequence because it is done purely as an
optimization.
The original code called three functions primarily for their
side effects but as condition of an if statement, which is
admittedly a bad style.
Incidentally, it squelches an "empty if body" warning from gcc.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When escaping a string to be used as a sed regex, it is important
to only escape active characters. Escaping other characters is
undefined according to POSIX, and in practice leads to issues with
extensions such as GNU sed's \+.
Signed-off-by: Ralf Wildenhues <Ralf.Wildenhues@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Decline deleting tags or branches through git push <remote> :<ref> by
default, support config options hooks.allowdeletetag, hooks.allowdeletebranch
to override this per repository.
Before this patch the update hook interpreted deleting a tag, no matter if
annotated or not, through git push <remote> :<tag> as unannotated tag, and
declined it by default, but with an unappropriate error message:
$ git push origin :atag
deleting 'refs/tags/atag'
*** The un-annotated tag, atag, is not allowed in this repository
*** Use 'git tag [ -a | -s ]' for tags you want to propagate.
ng refs/tags/atag hook declined
error: hooks/update exited with error code 1
error: hook declined to update refs/tags/atag
error: failed to push to 'monolith:/git/qm/test-repo'
Signed-off-by: Gerrit Pape <pape@smarden.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The update hook template intends to abort if the project description file
hasn't been adjusted or is empty. This patch fixes the check for 'being
adjusted'.
Signed-off-by: Gerrit Pape <pape@smarden.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When saving patches to a maildir with e.g. mutt, the files are put into
the new/ subdirectory of the maildir, not cur/. This makes git-am state
"Nothing to do.". This patch lets git-mailsplit additional check new/
after reading cur/.
This was reported by Joey Hess through
http://bugs.debian.org/447396
Signed-off-by: Gerrit Pape <pape@smarden.org>
Acked-by: Jeff King <peff@peff.net>
Acked-by: Alex Riesen <raa.lkml@gmail.com>
Acked-by: Fernando J. Pereda <ferdy@gentoo.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
* mh/work-tree:
Make git-blame fail when working tree is needed and we're not in one
Don't always require working tree for git-rm
Use setup_work_tree() in builtin-ls-files.c
Refactor working tree setup
Avoid "test -o" as it is only XSI not POSIX, and not portable.
Avoid exit(3) in test programs in favor of return, to accommodate
for newer Autoconf not providing a declaration for exit.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
"git fsck" learnt the option "--lost-found" in v1.5.3-rc0~5, to make
"git lost-found" obsolete. It is time to deprecate "git lost-found".
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
ZLIB_VERNUM isn't defined in some zlib versions, so this patch does a proper
linking test in autoconf to see whether deflateBound exists in zlib. Also,
setting NO_DEFLATE_BOUND will also work for folk not using autoconf.
Signed-off-by: David Symonds <dsymonds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Even if our code is quite a good documentation for our coding style,
some people seem to prefer a document describing it.
The part about the shell scripts is clearly just copied from one of
Junio's helpful mails, and some parts were added from comments by
Junio, Andreas Ericsson and Robin Rosenberg.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Email subjects are prefixed with "[SCM] " by default, make this optionally
configurable through the hooks.emailprefix config option.
Suggested by martin f krafft through
http://bugs.debian.org/428418
Signed-off-by: Gerrit Pape <pape@smarden.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
git-svn occasionally fails with no details as to what went wrong - this should help debug those situations.
Signed-off-by: Ask Bjørn Hansen <ask@develooper.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Many git commands have a -q option to suppress output to stdout, let's
have it for git-reset too.
This was asked for by Joey Hess through
http://bugs.debian.org/444933
Signed-off-by: Gerrit Pape <pape@smarden.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This allows to do git rm --cached -r directory, instead of
git ls-files -z directory | git update-index --remove -z --stdin.
This can be particularly useful for git-filter-branch users.
Signed-off-by: Mike Hommey <mh@glandium.org>
Acked-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Mike Hommey <mh@glandium.org>
Acked-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Create a setup_work_tree() that can be used from any command requiring
a working tree conditionally.
Signed-off-by: Mike Hommey <mh@glandium.org>
Acked-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
* maint:
Remove a couple of duplicated include
grep with unmerged index
git-daemon: fix remote port number in log entry
git-svn: t9114: verify merge commit message in test
git-svn: fix dcommit clobbering when committing a series of diffs
We called flush_grep() every time we saw an unmerged entry in
the index. If we happen to find an unmerged entry before we saw
more than two paths, we incorrectly declared that the user had
too many non-paths options in front.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
