This new option does essentially the same thing as -m option when checking
unmerged paths out of the index, but it uses the specified style instead
of configured merge.conflictstyle.
Setting "merge.conflictstyle" to "diff3" is usually less useful than using
the default "merge" style, because the latter allows a conflict that
results by both sides changing the same region in a very similar way to
get simplified substancially by reducing the common lines. However, when
one side removed a group of lines (perhaps a function was moved to some
other file) while the other side modified it, the default "merge" style
does not give any clue as to why the hunk is left conflicting. You would
need the original to understand what is going on.
The recommended use would be not to set merge.conflictstyle variable so
that you would usually use the default "merge" style conflict, and when
the result in a path in a particular merge is too hard to understand, use
"git checkout --conflict=diff3 $path" to check it out with the original to
review what is going on.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This teaches git-checkout to recreate a merge out of unmerged
index entries while resolving conflicts.
With this patch, checking out an unmerged path from the index
now have the following possibilities:
* Without any option, an attempt to checkout an unmerged path
will atomically fail (i.e. no other cleanly-merged paths are
checked out either);
* With "-f", other cleanly-merged paths are checked out, and
unmerged paths are ignored;
* With "--ours" or "--theirs, the contents from the specified
stage is checked out;
* With "-m" (we should add "--merge" as synonym), the 3-way merge
is recreated from the staged object names and checked out.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
* jc/maint-checkout-fix:
checkout --ours/--theirs: allow checking out one side of a conflicting merge
checkout -f: allow ignoring unmerged paths when checking out of the index
checkout: do not check out unmerged higher stages randomly
This teaches the low-level ll_xdl_merge() routine to honor
merge.conflictstyle configuration variable, so that merge-recursive
strategy can show the conflicts in the style of user's choice.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This teaches "git merge-file" to honor merge.conflictstyle configuration
variable, whose value can be "merge" (default) or "diff3".
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This teaches rerere to grok conflicts expressed in "diff3 -m" style
output, where the version from the common ancestor is output after the
first side, preceded by a "|||||||" line.
The rerere database needs to keep only the versions from two sides, so the
code parses the original copy and discards it.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
These hardcoded integers make the code harder to follow than necessary;
replace them with enums to make it easier to read, before adding support
for optionally parsing "diff3 -m" style conflict markers.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When showing a conflicting merge result, and "--diff3 -m" style is asked
for, this patch makes sure that the merge reduction level does not exceed
XDL_MERGE_EAGER. This is because "diff3 -m" style output would not make
sense for anything more aggressive than XDL_MERGE_EAGER, because of the
way how the merge reduction works.
"git merge-file" no longer has to force MERGE_EAGER when "--diff3" is
asked for because of this change.
Suppose a common ancestor (shared preimage) is modified to postimage #1
and #2 (each letter represents one line):
#####
postimage#1: 1234ABCDE789
| /
| /
preimage: 123456789
| \
postimage#2: 1234AXYE789
####
XDL_MERGE_MINIMAL and XDL_MERGE_EAGER would:
(1) find the s/56/ABCDE/ done on one side and s/56/AXYE/ done on the
other side,
(2) notice that they touch an overlapping area, and
(3) mark it as a conflict, "ABCDE vs AXYE".
The difference between the two algorithms is that EAGER drops the hunk
altogether if the postimages match (i.e. both sides modified the same
way), while MINIMAL keeps it. There is no other operation performed to
the hunk. As the result, lines marked with "#" in the above picure will
be in the RCS merge style output like this (letters <, = and > represent
conflict marker lines):
output: 1234<ABCDE=AXYE>789 ; with MINIMAL/EAGER
The part from the preimage that corresponds to these conflicting changes
is "56", which is what "diff3 -m" style output adds to it:
output: 1234<ABCDE|56=AXYE>789 ; in "diff3 -m" style
Now, XDL_MERGE_ZEALOUS looks at the differences between the changes two
postimages made in order to reduce the number of lines in the conflicting
regions. It notices that both sides start their new contents with "A",
and excludes it from the output (it also excludes "E" for the same
reason). The conflict that used to be "ABCDE vs AXYE" is now "BCD vs XY":
output: 1234A<BCD=XY>E789 ; with ZEALOUS
There could even be matching parts between two postimages in the middle.
Instead of one side rewriting the shared "56" to "ABCDE" and the other
side to "AXYE", imagine the case where the postimages are "ABCDE" and
"AXCYE", in which case instead of having one conflicted hunk "BCD vs XY",
you would have two conflicting hunks "B vs X" and "D vs Y".
In either case, once you reduce "ABCDE vs AXYE" to "BCD vs XY" (or "ABCDE
vs AXCYE" to "B vs X" and "D vs Y"), there is no part from the preimage
that corresponds to the conflicting change made in both postimages
anymore. In other words, conflict reduced by ZEALOUS algorithm cannot be
expressed in "diff3 -m" style. Representing the last illustration like
this is misleading to say the least:
output: 1234A<BCD|56=XY>E789 ; broken "diff3 -m" style
because the preimage was not ...4A56E... to begin with. "A" and "E" are
common only between the postimages.
Even worse, once a single conflicting hunk is split into multiple ones
(recall the example of breaking "ABCDE vs AXCYE" to "B vs X" and "D vs
Y"), there is no sane way to distribute the preimage text across split
conflicting hunks.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This replaces hardcoded magic constants with symbolic ones for
readability, and swaps one if/else blocks to better match the
order in which 0/1/2 variables are handled to nearby codepath.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When showing conflicting merges, we traditionally followed RCS's merge
output format. The output shows:
<<<<<<<
postimage from one side;
=======
postimage of the other side; and
>>>>>>>
Some poeple find it easier to be able to understand what is going on when
they can view the common ancestor's version, which is used by "diff3 -m",
which shows:
<<<<<<<
postimage from one side;
|||||||
shared preimage;
=======
postimage of the other side; and
>>>>>>>
This is an initial step to bring that as an optional feature to git.
Only "git merge-file" has been converted, with "--diff3" option.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This simply moves code around to make a separate function that prepares
a single conflicted hunk with markers into the buffer.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This lets you to check out 'our' (or 'their') version of an
unmerged path out of the index while resolving conflicts.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Earlier we made "git checkout $pathspec" to atomically refuse
the operation of $pathspec matched any path with unmerged
stages. This patch allows:
$ git checkout -f a b c
to ignore, instead of error out on, such unmerged paths. The
fix to prevent checkout of an unmerged path from random stages
is still there.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
During a conflicted merge when you have unmerged stages for a
path F in the index, if you said:
$ git checkout F
we rewrote F as many times as we have stages for it, and the
last one (typically "theirs") was left in the work tree, without
resolving the conflict.
This fixes it by noticing that a specified pathspec pattern
matches an unmerged path, and by erroring out.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Update to gitutorial as discussedin the git mailing list:
http://marc.info/?t=121969390900002&r=1&w=2
Signed-off-by: Paolo Ciarrocchi <paolo.ciarrocchi@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When running a command like:
git log --pretty=format:%ad --date=short
the date option was ignored. This patch causes it to use whatever
format was specified by --date (or by --relative-date, etc), just
as the non-user formats would do.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
It is in general unsafe to start a program with one or more of file
descriptors 0/1/2 closed. Karl Chen for example noticed that stat_command
does this in order to rename a pipe file descriptor to 0:
dup2(from, 0);
close(from);
... but if stdin was closed (for example) from == 0, so that
dup2(0, 0);
close(0);
just ends up closing the pipe. Another extremely rare but nasty problem
would occur if an "important" file ends up in file descriptor 2, and is
corrupted by a call to die().
Fixing this in git was considered to be overkill, so this patch works
around it only for git-shell. The fix is simply to open all the "low"
descriptors to /dev/null in main.
Signed-off-by: Paolo Bonzini <bonzini@gnu.org>
Acked-by: Stephen R. van den Berg <srb@cuci.nl>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This was part of my original patch, but appears to have been lost.
Signed-off-by: Yann Dirson <ydirson@altern.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The dirstat code depends on the fact that we always generate diffs with
the names sorted, since it then just does a single-pass walk-over of the
sorted list of names and how many changes there were. The sorting means
that all files are nicely grouped by directory.
That all works fine.
Except when we have rename detection, and suddenly the nicely sorted list
of pathnames isn't all that sorted at all. And now the single-pass dirstat
walk gets all confused, and you can get results like this:
[torvalds@nehalem linux]$ git diff --dirstat=2 -M v2.6.27-rc4..v2.6.27-rc5
3.0% arch/powerpc/configs/
6.8% arch/arm/configs/
2.7% arch/powerpc/configs/
4.2% arch/arm/configs/
5.6% arch/powerpc/configs/
8.4% arch/arm/configs/
5.5% arch/powerpc/configs/
23.3% arch/arm/configs/
8.6% arch/powerpc/configs/
4.0% arch/
4.4% drivers/usb/musb/
4.0% drivers/watchdog/
7.6% drivers/
3.5% fs/
The trivial fix is to add a sorting pass, fixing it to:
[torvalds@nehalem linux]$ git diff --dirstat=2 -M v2.6.27-rc4..v2.6.27-rc5
43.0% arch/arm/configs/
25.5% arch/powerpc/configs/
5.3% arch/
4.4% drivers/usb/musb/
4.0% drivers/watchdog/
7.6% drivers/
3.5% fs/
Spot the difference. In case anybody wonders: it's because of a ton of
renames from {include/asm-blackfin => arch/blackfin/include/asm} that just
totally messed up the file ordering in between arch/arm and arch/powerpc.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
More often than not, I end up using something like refs/remotes/ as the
pattern for for-each-ref, but that doesn't work, because it expects to see
the slash in the ref name right after the matched pattern. So teach it to
accept the slash as the final character in the pattern as well.
Signed-off-by: Björn Steinbrink <B.Steinbrink@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Some platforms contaminate the preprocessor token namespace with their own
definition of SS without being asked. Avoid getting hit by redefinition
warning messages by explicitly undef SS, AA and DD shorthand we use in this
table definition.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The index-pack command, when processing a thin pack, fixed up the pack
after-the-fact. It forgets to fsync the result, because it only did that
in one path rather in all cases of fixup.
This moves the fsync_or_die() to the fix-up routine itself, rather than
doing it in one of the callers, so that all cases are covered.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
"git index-pack" is an independent command and does not setup git
repository while still need pack.indexversion. It may miss the
info if it is in a subdirectory of the repository.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
In particular, when testing if the filesystem allows tabs in
filenames, bash issues an error something like:
./t4016-diff-quote.sh: pathname with HT: No such file or directory
which is caused by the failure of the (stdout) redirection,
since the file cannot be created. In order to suppress the
error message, you must redirect stderr to /dev/null, *before*
the stdout redirection on the command-line.
Also, remove a redundant filesystem check from the begining of
the t3902-quoted.sh test and standardise the "test skipped"
message to 'say' on exit.
Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This has been broken in v1.6.0 due to the reorganization of
the revision option parsing code. The "-i" is completely
ignored, but works fine in "git log --grep -i".
What happens is that the code for "-i" looks for
revs->grep_filter; if it is NULL, we do nothing, since there
are no grep filters. But that is obviously not correct,
since we want it to influence the later --grep option. Doing
it the other way around works, since "-i" just impacts the
existing grep_filter option.
Instead, we now always initialize the grep_filter member and
just fill in options and patterns as we get them. This means
that we can no longer check grep_filter for NULL, but
instead must check the pattern list to see if we have any
actual patterns.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The unwary user may not know how to disable the -FRSX options.
Signed-off-by: Jonathan Nieder <jrnieder@uchicago.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
It was not obvious from the text that pager.<cmd> is a boolean
setting.
While we're changing the description, make some other
improvements: lest we forget and fret, clarify that -p and
pager.<cmd> do not kick in when stdout is not a tty; point to
related core.pager and GIT_PAGER settings; use renamed --paginate
option.
Signed-off-by: Jonathan Nieder <jrnieder@uchicago.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This patch massages the documentation a bit for improved readability and cleans
it up from outdated options/commands.
Signed-off-by: Simon Hausmann <simon@lst.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Fix git-diff to make it produce useful 3-way diffs for merge conflicts in
repositories with autocrlf enabled. Otherwise it always reports that the
whole file was changed, because it uses the contents from the working tree
without necessary conversion.
Signed-off-by: Alexander Gavrilov <angavrilov@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
In 81cc66a, customization has been added to Makefile for supporting
HP-UX, but git commit is still problematic. This should fix the issue.
Signed-off-by: Miklos Vajna <vmiklos@frugalware.org>
Acked-by: Robert Schiele <rschiele@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The "trivial merge" codepath wants to optimize itself by making an
internal call to the read-tree machinery, but it does not read the index
before doing so, and the codepath is never exercised. Incidentally, this
failure to read the index upfront means that the safety to refuse doing
anything when the index is unmerged does not kick in, either.
These two problem are fixed by using read_cache_unmerged() that does read
the index before checking if it is unmerged at the beginning of
cmd_merge().
The primary logic of the merge, however, assumes that the process never
reads the index in-core, and the call to write_cache_as_tree() it makes
from write_tree_trivial() will always read from the on-disk index that is
prepared the strategy back-ends. This assumption is now broken by the
above fix. To fix this issue, we now call discard_cache() before calling
write_tree_trivial() when it wants to write the on-disk index as a tree.
When multiple strategies are tried, their results are evaluated by reading
the resulting index and inspecting it. The codepath needs to make a call
to read_cache() for each successful strategy, and for that to work, they
need to discard_cache() the one read by the previous round.
Also the "trivial merge" forgot that the current commit is one of the
parents of the resulting commit.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
unpack_trees() rebuilds the in-core index from scratch by allocating a new
structure and finishing it off by copying the built one to the final
index.
The resulting in-core index is Ok for most use, but read_cache() does not
recognize it as such. The function is meant to be no-op if you already
have loaded the index, until you call discard_cache().
This change the way read_cache() detects an already initialized in-core
index, by introducing an extra bit, and marks the handcrafted in-core
index as initialized, to avoid this problem.
A better fix in the longer term would be to change the read_cache() API so
that it will always discard and re-read from the on-disk index to avoid
confusion. But there are higher level API that have relied on the current
semantics, and they and their users all need to get converted, which is
outside the scope of 'maint' track.
An example of such a higher level API is write_cache_as_tree(), which is
used by git-write-tree as well as later Porcelains like git-merge, revert
and cherry-pick. In the longer term, we should remove read_cache() from
there and add one to cmd_write_tree(); other callers expect that the
in-core index they prepared is what gets written as a tree so no other
change is necessary for this particular codepath.
The original version of this patch marked the index by pointing an
otherwise wasted malloc'ed memory with o->result.alloc, but this version
uses Linus's idea to use a new "initialized" bit, which is conceptually
much cleaner.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The function built a p4 command string via the p4_build_cmd function, but
ignored the result.
Signed-off-by: Tor Arvid Lund <torarvid@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
git help foo invokes man git-foo if foo is a git command, otherwise it
invokes man gitfoo. 'help' is not a git command, but the manual page is
called git-help, so add this special exception.
Signed-off-by: Miklos Vajna <vmiklos@frugalware.org>
Acked-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Some platforms provide a horribly broken snprintf. More broken than the
platforms that return -1 when there is too little space in the target buffer
for the formatted string. Some platforms provide an snprintf which _always_
returns the number of characters transmitted to the buffer, regardless of
whether there was enough space or not.
IRIX 6.5 is such a platform. IRIX does have a working snprintf(), but it
is only provided when _NO_XOPEN5 evaluates to zero, and this only happens
if _XOPEN_SOURCE is defined, but definition of _XOPEN_SOURCE prevents
inclusion of many other common functions and defines. So it must be avoided.
Work around these horribly broken snprintf implementations by detecting an
snprintf call which results in the number of transmitted characters exactly
equal to the length of our buffer and retrying with a larger buffer just to
be safe.
Signed-off-by: Brandon Casey <casey@nrlssc.navy.mil>
Acked-by: Johannes Sixt <johannes.sixt@telecom.at>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Don't rely on the extracted URL from working_head_info since that has the
username removed. Instead use the $gs->full_url method (as before with
ba24e74 (git-svn: add ability to specify --commit-url for dcommit,
2008-08-07)) to give us the URL to commit to if --commit-url is not
specified.
Aditionally, since we clean usernames from URLs, checking the URL after
rebase can fail because it doesn't match the URL we used to commit; so
unconditionally provide a username-free URL for checking the result of the
refetch.
Signed-off-by: Eric Wong <normalperson@yhbt.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The variable show_early_output is defined in revision.c and should be
declared extern in revision.h so that the linker does not complain
about multiply defined variables.
Signed-off-by: Brandon Casey <casey@nrlssc.navy.mil>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Based on its name, people may read the 'git revert' documentation when
they want to undo local changes, especially people who have used other
SCM's. 'git revert' may not be what they had in mind, but git
provides several other ways to undo changes to files. We can help
them by pointing them towards the git commands that do what they might
want to do.
Cc: Daniel Barkalow <barkalow@iabervon.org>
Cc: Lea Wiemann <lewiemann@gmail.com>
Signed-off-by: Tarmigan Casebolt <tarmigan+git@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
If 'make install' was run with sufficient privileges, then the installed
templates, which are copied using 'tar', would receive the user and group
of whoever built git. This instructs 'tar' to ignore the user and group
that are recorded in the archive.
Signed-off-by: Johannes Sixt <johannes.sixt@telecom.at>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
We used to refresh the index to clear stat-dirtyness before a fast-forward
merge. Recent C rewrite forgot to do this.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
"git-merge" is a binary executable these days, and looking for assignment
to $all_strategies variable with grep/sed does not work well.
When asked for an unknown strategy, pre-1.6.0 and post-1.6.0 "git merge"
commands respectively say:
$ $HOME/git-snap-v1.5.6.5/bin/git merge -s help
available strategies are: recur recursive octopus resolve stupid ours subtree
$ $HOME/git-snap-v1.6.0/bin/git merge -s help
Could not find merge strategy 'help'.
Available strategies are: recursive octopus resolve ours subtree.
both on their standard error stream. We can use this to learn what
strategies are supported.
The sed script is written in such a way that it catches both old and new
message styles ("Available" vs "available", and the full stop at the end).
It also allows future versions of "git merge" to line-wrap the list of
strategies, and add extra comments, like this:
$ $HOME/git-snap-v1.6.1/bin/git merge -s help
Could not find merge strategy 'help'.
Available strategies are: blame recursive octopus resolve ours
subtree.
Also you have custom strategies: theirs
Make sure you spell strategy names correctly.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
We don't actually modify the struct object, so there is no
reason not to accept const versions (and this allows other
callsites, like the next patch, to use the decoration
machinery).
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
If you have a tag with a single, incomplete line as its payload, asking
git-for-each-ref for its %(body) element accessed a NULL pointer.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The code remembered that the last diff output it saw was an empty line,
and tried to reset that state whenever it sees a context line, a non-blank
new line, or a new hunk. However, this codepath asks the underlying diff
engine to feed diff without any context, and the "just saw an empty line"
state was not reset if you added a new blank line in the last hunk of your
patch, even if it is not the last line of the file.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
