With core.ignorecase=true, name-hash.c builds a case insensitive index of
all tracked directories. Currently, the existing cache entry structures are
added multiple times to the same hashtable (with different name lengths and
hash codes). However, there's only one dir_next pointer, which gets
completely messed up in case of hash collisions. In the worst case, this
causes an endless loop if ce == ce->dir_next (see t7062).
Use a separate hashtable and separate structures for the directory index
so that each directory entry has its own next pointer. Use reference
counting to track which directory entry contains files.
There are only slight changes to the name-hash.c API:
- new free_name_hash() used by read_cache.c::discard_index()
- remove_name_hash() takes an additional index_state parameter
- index_name_exists() for a directory (trailing '/') may return a cache
entry that has been removed (CE_UNHASHED). This is not a problem as the
return value is only used to check if the directory exists (dir.c) or to
normalize casing of directory names (read-cache.c).
Getting rid of cache_entry.dir_next reduces memory consumption, especially
with core.ignorecase=false (which doesn't use that member at all).
With core.ignorecase=true, building the directory index is slightly faster
as we add / check the parent directory first (instead of going through all
directory levels for each file in the index). E.g. with WebKit (~200k
files, ~7k dirs), time spent in lazy_init_name_hash is reduced from 176ms
to 130ms.
Signed-off-by: Karsten Blees <blees@dcon.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
In commit 9db31bdf (submodule: Add --force option for git submodule
update, 2011-04-01) we added the option to the implementation's usage
synopsis but forgot to add it to the synopsis in the command
documentation. Add the option to the synopsis in the same location it
is reported in usage and re-wrap the options to avoid long lines.
Signed-off-by: Brad King <brad.king@kitware.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The logic described in d020e27 (diff: Fix rename pretty-print when
suffix and prefix overlap, 2013-02-23) is wrong: The proof in the
comment is valid only if both strings are the same length. *One* of
old/new can reach a-1 (b-1, resp.) if 'a' is a suffix of 'b' (or vice
versa).
Since the intent was to let the loop run down to the '/' at the end of
the common prefix, fix it by making that distinction explicit: if
there is no prefix, allow no underrun.
Signed-off-by: Thomas Rast <trast@student.ethz.ch>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
filter-branch --env-filter example that shows how to change the email
address in all commits before publishing a project.
Signed-off-by: Tadeusz Andrzej Kadłubowski <yess@hell.org.pl>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
There is a rare edge case of git-filter-branch: a filter that unsets
identity variables from the environment. Link to git-commit-tree
clarifies how Git would fall back in this situation.
Signed-off-by: Tadeusz Andrzej Kadłubowski <yess@hell.org.pl>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Some platforms may lack the NI_MAXHOST and NI_MAXSERV values in their
system headers, so ensure they are available.
Signed-off-by: David Michael <fedora.dm0@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
* bw/get-tz-offset-perl:
cvsimport: format commit timestamp ourselves without using strftime
perl/Git.pm: fix get_tz_offset to properly handle DST boundary cases
Move Git::SVN::get_tz to Git::get_tz_offset
"Advice" is a mass noun, not a count noun; it's not ordinarily
pluralized.
Signed-off-by: Greg Price <price@mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
It's not clear in git-describe(1) what kind of "pattern" should be
passed to --match. Fix that.
Signed-off-by: Greg Price <price@mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Descriptions borrowed from templates/hooks--pre-rebase.sample.
Signed-off-by: W. Trevor King <wking@tremily.us>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When considering a rename for two files that have a suffix and a prefix
that can overlap, a confusing line is shown. As an example, renaming
"a/b/b/c" to "a/b/c" shows "a/b/{ => }/b/c".
Currently, what we do is calculate the common prefix ("a/b/"), and the
common suffix ("/b/c"), but the same "/b/" is actually counted both in
prefix and suffix. Then when calculating the size of the non-common part,
we end-up with a negative value which is reset to 0, thus the "{ => }".
Do not allow the common suffix to overlap the common prefix and stop
when reaching a "/" that would be in both.
Signed-off-by: Antoine Pelisse <apelisse@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Even though "git update-index" was updated to use parse-options
infrastracture some time ago to make it possible to show list of
options with usage_with_options(), "git update-index -h" only shows
the usage. Detect this case and call usage_with_options() to show
the list of options as well.
Signed-off-by: Antoine Pelisse <apelisse@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
It said "by default it is off" while it also said "the default is
always", which confused everybody who read it only once. It wanted
to say (1) if you do not say --color, it is not enabled, and (2) if
you say --color but do not say when to enable it, it will always be
enabled".
Rephrase to clarify by using "default" only once.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Read and write each 1024 byte buffer, rather than trying to buffer
the entire content of the file. We are only copying the contents to
a file descriptor and do not use it ourselves.
Previous code would crash on all files > 2 Gib, when the offset
variable became negative (perhaps below the level of perl),
resulting in a crash. On a 32 bit system, or a system with low
memory it might crash before reaching 2 GiB due to memory
exhaustion.
This code may leave a partial file behind in case of failure, where
the old code would leave a completely empty file. Neither version
verifies the correctness of the content. Calling code must take
care of verification and cleanup.
Signed-off-by: Joshua Clayton <stillcompiling@gmail.com>
Reviewed-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
9d22778 (read-cache.c: write prefix-compressed names in the index -
2012-04-04) defined these. Interestingly, they were not used by
read-cache.c, or anywhere in that patch. They were used in
builtin/update-index.c later for checking supported index
versions. Use them here too.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Commit 1b77d83cab 'setup_git_directory_gently_1(): resolve symlinks
in ceiling paths' changed the setup code to resolve symlinks in the
entries in GIT_CEILING_DIRECTORIES. Because those entries are
compared textually to the symlink-resolved current directory, an
entry in GIT_CEILING_DIRECTORIES that contained a symlink would have
no effect. It was known that this could cause performance problems
if the symlink resolution *itself* touched slow filesystems, but it
was thought that such use cases would be unlikely. The intention of
the earlier change was to deal with a case when the user has this:
GIT_CEILING_DIRECTORIES=/home/gitster
but in reality, /home/gitster is a symbolic link to somewhere else,
e.g. /net/machine/home4/gitster. A textual comparison between the
specified value /home/gitster and the location getcwd(3) returns
would not help us, but readlink("/home/gitster") would still be
fast.
After this change was released, Anders Kaseorg <andersk@mit.edu>
reported:
> [...] my computer has been acting so slow when I’m not connected to
> the network. I put various network filesystem paths in
> $GIT_CEILING_DIRECTORIES, such as
> /afs/athena.mit.edu/user/a/n/andersk (to avoid hitting its parents
> /afs/athena.mit.edu, /afs/athena.mit.edu/user/a, and
> /afs/athena.mit.edu/user/a/n which all live in different AFS
> volumes). Now when I’m not connected to the network, every
> invocation of Git, including the __git_ps1 in my shell prompt, waits
> for AFS to timeout.
To allow users to work around this problem, give them a mechanism to
turn off symlink resolution in GIT_CEILING_DIRECTORIES entries. All
the entries that follow an empty entry will not be checked for symbolic
links and used literally in comparison. E.g. with these:
GIT_CEILING_DIRECTORIES=:/foo/bar:/xyzzy or
GIT_CEILING_DIRECTORIES=/foo/bar::/xyzzy
we will not readlink("/xyzzy") because it comes after an empty entry.
With the former (but not with the latter), "/foo/bar" comes after an
empty entry, and we will not readlink it, either.
Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
If you are using autoconf and change the configure.ac, the
Makefile will notice that config.status is older than
configure.ac, and will attempt to rebuild and re-run the
configure script to pick up your changes. The first step in
doing so is to run "make configure". Unfortunately, this
tries to include config.mak.autogen, which depends on
config.status, which depends on configure.ac; so we must
rebuild config.status. Which leads to us running "make
configure", and so on.
It's easy to demonstrate with:
make configure
./configure
touch configure.ac
make
We can break this cycle by not re-invoking make to build
"configure", and instead just putting its rules inline into
our config.status rebuild procedure. We can avoid a copy by
factoring the rules into a make variable.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
To talk with some sites that serve multiple names on a single IP
address, the client needs to ask for the specific host that it wants
to talk to.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
* ob/imap-send-ssl-verify:
imap-send: support subjectAltName as well
imap-send: the subject of SSL certificate must match the host
imap-send: move #ifdef around
Check not only the common name of the certificate subject, but also
check the subject alternative DNS names as well, when verifying that
the certificate matches that of the host we are trying to talk to.
Signed-off-by: Oswald Buddenhagen <ossi@kde.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
We did not check a valid certificate's subject at all, and would
have happily talked with a wrong host after connecting to an
incorrect address and getting a valid certificate that does not
belong to the host we intended to talk to.
Signed-off-by: Oswald Buddenhagen <ossi@kde.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
If you try and update a submodule with a dirty working directory, you
get an error message like:
$ git submodule update
error: Your local changes to the following files would be overwritten by checkout:
...
Please, commit your changes or stash them before you can switch branches.
Aborting
...
Mention this in the submodule notes. The previous phrase was short
enough that I originally thought it might have been referring to the
reflog note (obviously, uncommitted changes will not show up in the
reflog either ;).
Signed-off-by: W. Trevor King <wking@tremily.us>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Less work and more error checking (e.g. does a merge base exist?).
Add an explicit push before request-pull to satisfy request-pull,
which checks to make sure the references are publically available.
Signed-off-by: W. Trevor King <wking@tremily.us>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
I think this interface is often more convenient than extended cherry
picking or using 'git format-patch'. In fact, I removed the
cherry-pick section entirely. The entry-level suggestions for
rerolling are now:
1. git commit --amend
2. git format-patch origin
git reset --hard origin
...edit and reorder patches...
git am *.patch
3. git rebase -i origin
Signed-off-by: W. Trevor King <wking@tremily.us>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Instead of adding an early return to the inside of the
ssl_socket_connect() function for NO_OPENSSL compilation, split it
into a separate stub function.
No functional change, but the next change to extend ssl_socket_connect()
will become easier to read this way.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This functionality was introduced by 0e804e09 (archive: provide
builtin .tar.gz filter, 2011-07-21) for v1.7.7.
Signed-off-by: W. Trevor King <wking@tremily.us>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
A simple command line call is easier than spawning an editor,
especially for folks new to ideas like the "command line" and "text
editors". This is also the approach suggested by 'git commit' if you
try and commit without having configured user.name or user.email.
Signed-off-by: W. Trevor King <wking@tremily.us>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
