This is a rewrite of much of Bo's work, mainly in an effort to split
it into smaller, easier to understand routines.
The algorithm is built around the struct range_set, which encodes a
series of line ranges as intervals [a,b). This is used in two
contexts:
* A set of lines we are tracking (which will change as we dig through
history).
* To encode diffs, as pairs of ranges.
The main routine is range_set_map_across_diff(). It processes the
diff between a commit C and some parent P. It determines which diff
hunks are relevant to the ranges tracked in C, and computes the new
ranges for P.
The algorithm is then simply to process history in topological order
from newest to oldest, computing ranges and (partial) diffs. At
branch points, we need to merge the ranges we are watching. We will
find that many commits do not affect the chosen ranges, and mark them
TREESAME (in addition to those already filtered by pathspec limiting).
Another pass of history simplification then gets rid of such commits.
This is wired as an extra filtering pass in the log machinery. This
currently only reduces code duplication, but should allow for other
simplifications and options to be used.
Finally, we hook a diff printer into the output chain. Ideally we
would wire directly into the diff logic, to optionally use features
like word diff. However, that will require some major reworking of
the diff chain, so we completely replace the output with our own diff
for now.
As this was a GSoC project, and has quite some history by now, many
people have helped. In no particular order, thanks go to
Jakub Narebski <jnareb@gmail.com>
Jens Lehmann <Jens.Lehmann@web.de>
Jonathan Nieder <jrnieder@gmail.com>
Junio C Hamano <gitster@pobox.com>
Ramsay Jones <ramsay@ramsay1.demon.co.uk>
Will Palmer <wmpalmer@gmail.com>
Apologies to everyone I forgot.
Signed-off-by: Bo Yang <struggleyb.nku@gmail.com>
Signed-off-by: Thomas Rast <trast@student.ethz.ch>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The function rewrite_one is used to rewrite a single
parent of the current commit, and is used by rewrite_parents
to rewrite all the parents.
Decouple the dependence between them by making rewrite_one
a callback function that is passed to rewrite_parents. Then
export rewrite_parents for reuse by the line history browser.
We will use this function in line-log.c.
Signed-off-by: Bo Yang <struggleyb.nku@gmail.com>
Signed-off-by: Thomas Rast <trast@student.ethz.ch>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
We want to use the same style of -L n,m argument for 'git log -L' as
for git-blame. Refactor the argument parsing of the range arguments
from builtin/blame.c to the (new) file that will hold the 'git log -L'
logic.
To accommodate different data structures in blame and log -L, the file
contents are abstracted away; parse_range_arg takes a callback that it
uses to get the contents of a line of the (notional) file.
The new test is for a case that made me pause during debugging: the
'blame -L with invalid end' test was the only one that noticed an
outright failure to parse the end *at all*. So make a more explicit
test for that.
Signed-off-by: Bo Yang <struggleyb.nku@gmail.com>
Signed-off-by: Thomas Rast <trast@student.ethz.ch>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
An earlier workaround designed to help people who list logical
directories that will not match what getcwd(3) returns in the
GIT_CEILING_DIRECTORIES had an adverse effect when it is slow to
stat and readlink a directory component of an element listed on it.
* mh/maint-ceil-absolute:
Provide a mechanism to turn off symlink resolution in ceiling paths
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>
* 'for-junio' of git://github.com/kusma/git:
wincred: improve compatibility with windows versions
wincred: accept CRLF on stdin to simplify console usage
This reverts commit 78457bc0ccc1af8b9eb776a0b17986ebd50442bc.
commit 28c5d9e ("vcs-svn: drop string_pool") previously removed
the only call-site for strtok_r. So let's get rid of the compat
implementation as well.
Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com>
Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
On WinXP, the windows credential helper doesn't work at all (due to missing
Cred[Un]PackAuthenticationBuffer APIs). On Win7, the credential format used
by wincred is incompatible with native Windows tools (such as the control
panel applet or 'cmdkey.exe /generic'). These Windows tools only set the
TargetName, UserName and CredentialBlob members of the CREDENTIAL
structure (where CredentialBlob is the UTF-16-encoded password).
Remove the unnecessary packing / unpacking of the password, along with the
related API definitions, for compatibility with Windows XP.
Don't use CREDENTIAL_ATTRIBUTEs to identify credentials for compatibility
with Windows credential manager tools. Parse the protocol, username, host
and path fields from the credential's target name instead.
Credentials created with an old wincred version will have mangled or empty
passwords after this change.
Signed-off-by: Karsten Blees <blees@dcon.de>
Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com>
The windows credential helper currently only accepts LF on stdin, but bash
and cmd.exe both send CRLF. This prevents interactive use in the console.
Change the stdin parser to optionally accept CRLF.
Signed-off-by: Karsten Blees <blees@dcon.de>
Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com>
Further updates to the user manual.
* wk/user-manual:
user-manual: Flesh out uncommitted changes and submodule updates
user-manual: Use request-pull to generate "please pull" text
user-manual: Reorganize the reroll sections, adding 'git rebase -i'
A change made on v1.8.1.x maintenance track had a nasty regression
to break the build when autoconf is used.
* jn/less-reconfigure:
Makefile: avoid infinite loop on configure.ac change
"git check-ignore ." segfaulted, as a function it calls deep in its
callchain took a string in the <ptr, length> form but did not stop
when given an empty string.
* as/check-ignore:
name-hash: allow hashing an empty string
t0008: document test_expect_success_multi
An earlier change to config.mak.autogen broke a build driven by the
./configure script when --htmldir is not specified on the command
line of ./configure.
* ct/autoconf-htmldir:
Bugfix: undefined htmldir in config.mak.autogen
* 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>
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>
* 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>
Html documents will be installed to root dir (/) no matter what prefix
is set, if run these commands before `make` and `make install-html`:
$ make configure
$ ./configure --prefix=<PREFIX>
After the installation, all the html documents will copy to rootdir (/),
and:
$ git --html-path
<PREFIX>
$ git help -w something
fatal: '<PREFIX>': not a documentation directory.
This is because the variable "htmldir" points to a undefined variable
"$(docdir)" in file "config.mak.autogen", which is generated by running
`./configure`. By default $(docdir) generated by configure is supposed
be set this way:
datarootdir='${prefix}/share'
htmldir='${docdir}'
docdir='${datarootdir}/doc/${PACKAGE_TARNAME}'
but since fc1c5415d69d (Honor configure's htmldir switch, 2013-02-02),
we only set and export htmldir without doing so for PACKAGE_TARNAME
(which is set to 'git' by the configure script).
Add the required two variables "PACKAGE_TARNAME" and "docdir" to file
"config.mak.in" will work this issue around.
Signed-off-by: Jiang Xin <worldhello.net@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Usually we do not pass an empty string to the function hash_name()
because we almost always ask for hash values for a path that is a
candidate to be added to the index. However, check-ignore (and most
likely check-attr, but I didn't check) apparently has a callchain
to ask the hash value for an empty path when it was given a "." from
the top-level directory to ask "Is the path . excluded by default?"
Make sure that hash_name() does not overrun the end of the given
pathname even when it is empty.
Remove a sweep-the-issue-under-the-rug conditional in check-ignore
that avoided to pass an empty string to the callchain while at it.
It is a valid question to ask for check-ignore if the top-level is
set to be ignored by default, even though the answer is most likely
no, if only because there is currently no way to specify such an
entry in the .gitignore file. But it is an unusual thing to ask and
it is not worth optimizing for it by special casing at the top level
of the call chain.
Signed-off-by: Adam Spiers <git@adamspiers.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>
