In merge-recursive.c, whenever there was a rename where a file name on one
side of the rename matches a directory name on the other side of the merge,
then the very first check that
string_list_has_string(&o->current_directory_set, ren1_dst)
would trigger forcing it into marking it as a rename/directory conflict.
However, if the path is only renamed on one side and a simple three-way
merge between the separate files resolves cleanly, then we don't need to
mark it as a rename/directory conflict. So, we can simply move the check
for rename/directory conflicts after we've verified that there isn't a
rename/rename conflict and that a threeway content merge doesn't work.
This changes the particular error message one gets in the case where the
directory name that a file on one side of the rename matches is not also
part of the rename pair. For example, with commits containing the files:
COMMON -> (HEAD, MERGE )
--------- --------------- -------
sub/file1 -> (sub/file1, newsub)
<NULL> -> (newsub/newfile, <NULL>)
then previously when one tried to merge MERGE into HEAD, one would get
CONFLICT (rename/directory): Rename sub/file1->newsub in HEAD directory newsub added in merge
Renaming sub/file1 to newsub~HEAD instead
Adding newsub/newfile
Automatic merge failed; fix conflicts and then commit the result.
After this patch, the error message will instead become:
Removing newsub
Adding newsub/newfile
CONFLICT (file/directory): There is a directory with name newsub in merge. Adding newsub as newsub~HEAD
Automatic merge failed; fix conflicts and then commit the result.
That makes more sense to me, because git can't know that there's a conflict
until after it's tried resolving paths involving newsub/newfile to see if
they are still in the way at the end (and if newsub/newfile is not in the
way at the end, there should be no conflict at all, which did not hold with
git previously).
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
* dg/local-mod-error-messages:
t7609-merge-co-error-msgs: test non-fast forward case too.
Move "show_all_errors = 1" to setup_unpack_trees_porcelain()
setup_unpack_trees_porcelain: take the whole options struct as parameter
Move set_porcelain_error_msgs to unpack-trees.c and rename it
Conflicts:
merge-recursive.c
>Due to this this (and maybe all the tests) need to depend on the
>SYMLINKS prereq.
Here's a third attempt with no use of symlinks in the test:
Skip the entire rename/add conflict case if the file added on the
other branch has the same contents as the file being renamed. This
avoids giving the user an extra copy of the same file and presenting a
conflict that is confusing and pointless.
A simple test of this case has been added in
t/t3030-merge-recursive.sh.
Signed-off-by: Ken Schalk <ken.schalk@intel.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
* jn/merge-renormalize:
merge-recursive --renormalize
rerere: never renormalize
rerere: migrate to parse-options API
t4200 (rerere): modernize style
ll-merge: let caller decide whether to renormalize
ll-merge: make flag easier to populate
Documentation/technical: document ll_merge
merge-trees: let caller decide whether to renormalize
merge-trees: push choice to renormalize away from low level
t6038 (merge.renormalize): check that it can be turned off
t6038 (merge.renormalize): try checkout -m and cherry-pick
t6038 (merge.renormalize): style nitpicks
Don't expand CRLFs when normalizing text during merge
Try normalizing files to avoid delete/modify conflicts when merging
Avoid conflicts when merging branches with mixed normalization
Conflicts:
builtin/rerere.c
t/t4200-rerere.sh
This is a preparation patch to let setup_unpack_trees_porcelain set
show_all_errors itself.
Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The function is currently dealing only with error messages, but the
intent of calling it is really to notify the unpack-tree mechanics that
it is running in porcelain mode.
Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
* en/d-f-conflict-fix:
merge-recursive: Avoid excessive output for and reprocessing of renames
merge-recursive: Fix multiple file rename across D/F conflict
t6031: Add a testcase covering multiple renames across a D/F conflict
merge-recursive: Fix typo
Mark tests that use symlinks as needing SYMLINKS prerequisite
t/t6035-merge-dir-to-symlink.sh: Remove TODO on passing test
fast-import: Improve robustness when D->F changes provided in wrong order
fast-export: Fix output order of D/F changes
merge_recursive: Fix renames across paths below D/F conflicts
merge-recursive: Fix D/F conflicts
Add a rename + D/F conflict testcase
Add additional testcases for D/F conflicts
Conflicts:
merge-recursive.c
Add support for merging with ignoring line endings (specifically
--ignore-space-at-eol) when using recursive merging. This is
as a strategy-option, so that you can do:
git merge --strategy-option=ignore-space-at-eol <branch>
and
git rebase --strategy-option=ignore-space-at-eol <branch>
This can be useful for coping with line-ending damage (Xcode 3.1 has a
nasty habit of converting all CRLFs to LFs, and VC6 tends to just use
CRLFs for inserted lines).
The only option I need is ignore-space-at-eol, but while at it,
include the other xdiff whitespace options (ignore-space-change,
ignore-all-space), too.
[jn: with documentation]
Signed-off-by: Justin Frankel <justin@cockos.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Teach the merge-recursive strategy a --patience option to use the
"patience diff" algorithm, which tends to improve results when
cherry-picking a patch that reorders functions at the same time as
refactoring them.
To support this, struct merge_options and ll_merge_options gain an
xdl_opts member, so programs can use arbitrary xdiff flags (think
"XDF_IGNORE_WHITESPACE") in a git-aware merge.
git merge and git rebase can be passed the -Xpatience option to
use this.
[jn: split from --ignore-space patch; with documentation]
Signed-off-by: Justin Frankel <justin@cockos.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Keeping track of the flag bits is proving more trouble than it's
worth. Instead, use a pointer to an options struct like most similar
APIs do.
Callers with no special requests can pass NULL to request the default
options.
Cc: Bert Wesarg <bert.wesarg@googlemail.com>
Cc: Avery Pennarun <apenwarr@gmail.com>
Helped-by: Justin Frankel <justin@cockos.com>
Helped-by: Bert Wesarg <bert.wesarg@googlemail.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
There are two very similar blocks of code that recognize options for
the "recursive" merge strategy. Unify them.
No functional change intended.
Cc: Avery Pennarun <apenwarr@gmail.com>
Helped-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
* hv/submodule-find-ff-merge:
Implement automatic fast-forward merge for submodules
setup_revisions(): Allow walking history in a submodule
Teach ref iteration module about submodules
Conflicts:
submodule.c
* dg/local-mod-error-messages:
t7609: test merge and checkout error messages
unpack_trees: group error messages by type
merge-recursive: distinguish "removed" and "overwritten" messages
merge-recursive: porcelain messages for checkout
Turn unpack_trees_options.msgs into an array + enum
Conflicts:
t/t3400-rebase.sh
In 5a2580d (merge_recursive: Fix renames across paths below D/F conflicts
2010-07-09) and ae74548 (merge-recursive: Fix multiple file rename across
D/F conflict 2010-08-17), renames across D/F conflicts were fixed by
making process_renames() consider as unprocessed renames whose dst_entry
"still" had higher stage entries. The assumption was that those higher
stage entries would have been cleared out of dst_entry by that point in
cases where the conflict could be resolved (normal renames with no D/F
conflicts). That is not the case -- higher stage entries will remain in
all cases.
Fix this by checking for higher stage entries corresponding to D/F
conflicts, namely that stages 2 and 3 have exactly one nonzero mode between
them. The nonzero mode stage corresponds to a file at the path, while the
stage with a zero mode will correspond to a directory at that path (since
rename/delete conflicts will have already been handled before this codepath
is reached.)
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
* cc/find-commit-subject:
blame: use find_commit_subject() instead of custom code
merge-recursive: use find_commit_subject() instead of custom code
bisect: use find_commit_subject() instead of custom code
revert: rename variables related to subject in get_message()
revert: refactor code to find commit subject in find_commit_subject()
revert: fix off by one read when searching the end of a commit subject
In 5a2580d (merge_recursive: Fix renames across paths below D/F conflicts
2010-07-09), detection was added for renames across paths involved in a
directory<->file conflict. However, the change accidentally involved
reusing an outer loop index ('i') in an inner loop, changing its values
and causing a slightly different type of breakage for cases where there are
multiple renames across the D/F conflict. Fix by creating a new temporary
variable 'i'.
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When an error is encountered, it calls add_rejected_file() which either
- directly displays the error message and stops if in plumbing mode
(i.e. if show_all_errors is not initialized at 1)
- or stores it so that it will be displayed at the end with display_error_msgs(),
Storing the files by error type permits to have a list of files for
which there is the same error instead of having a serie of almost
identical errors.
As each bind_overlap error combines a file and an old file, a list cannot be
done, therefore, theses errors are not stored but directly displayed.
Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
To limit the number of possible error messages, the error messages for
the case would_lose_untracked_file and would_lose_orphaned in
unpack_trees_options.msgs were handled with a single string,
parameterized by an action string ("overwritten" or "removed").
Instead, we consider them as two different cases, with unparameterized
string. This will make it easier to make separate lists sorted by error
types later.
Only the bind_overlap case still takes two %s parameters, but that's
unavoidable.
Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
A porcelain message was first added in checkout.c in the commit
8ccba008 (Junio C Hamano, Sat May 17 21:03:49 2008, unpack-trees:
allow Porcelain to give different error messages) to give better feedback
in the case of merge errors.
This patch adapts the porcelain messages for the case of checkout
instead. This way, when having a checkout error, "merge" no longer
appears in the error message.
While we're there, we add an advice in the case of
would_lose_untracked_file.
Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The list of error messages was introduced as a structure, but an array
indexed over an enum is more flexible, since it allows one to store a
type of error message (index in the array) in a variable.
This change needs to rename would_lose_untracked ->
would_lose_untracked_file to avoid a clash with the function
would_lose_untracked in merge-recursive.c.
Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Teach "git merge-recursive" a --renormalize option to enable the
merge.renormalize configuration. The --no-renormalize option can
be used to override it in the negative.
So in the future, you might be able to, e.g.:
git checkout -m -Xrenormalize otherbranch
or
git revert -Xrenormalize otherpatch
or
git pull --rebase -Xrenormalize
The bad part: merge.renormalize is still not honored for most
commands. And it reveals lots of places that -X has not been plumbed
in (so we get "git merge -Xrenormalize" but not much else).
NEEDSWORK: tests
Cc: Eyvind Bernhardsen <eyvind.bernhardsen@gmail.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Add a “renormalize” bit to the ll-merge options word so callers can
decide on a case-by-case basis whether the merge is likely to have
overlapped with a change in smudge/clean rules.
This reveals a few commands that have not been taking that situation
into account, though it does not fix them.
No functional change intended.
Cc: Eyvind Bernhardsen <eyvind.bernhardsen@gmail.com>
Improved-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
ll_merge() takes its options in a flag word, which has a few
advantages:
- options flags can be cheaply passed around in registers, while
an option struct passed by pointer cannot;
- callers can easily pass 0 without trouble for no options,
while an option struct passed by value would not allow that.
The downside is that code to populate and access the flag word can be
somewhat opaque. Mitigate that with a few macros.
Cc: Avery Pennarun <apenwarr@gmail.com>
Cc: Bert Wesarg <bert.wesarg@googlemail.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Add a "renormalize" option to struct merge_options so callers can
decide on a case-by-case basis whether the merge is likely to have
overlapped with a change in smudge/clean rules. The option defaults
to the global merge_renormalize setting for now.
No change in behavior intended.
Cc: Eyvind Bernhardsen <eyvind.bernhardsen@gmail.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The merge machinery decides whether to resmudge and clean relevant
entries based on the global merge_renormalize setting, which is set by
"git merge" based on its configuration (and left alone by other
commands).
A nicer interface would make that decision a parameter to merge_trees
so callers would pass in a choice made on a call-by-call basis.
Start by making blob_unchanged stop examining the merge_renormalize
global.
In other words, this change is a trivial no-op, but it brings us
closer to something good.
Cc: Eyvind Bernhardsen <eyvind.bernhardsen@gmail.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The rename logic in process_renames() handles renames and merging of file
contents and then marks files as processed. However, there may be higher
stage entries left in the index for other reasons (e.g., due to D/F
conflicts). By checking for such cases and marking the entry as not
processed, it allows process_entry() later to look at it and handle those
higher stages.
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The D/F conflicts that can be automatically resolved (file or directory
unmodified on one side of history), have the nice property that
process_entry() can correctly handle all subpaths of the D/F conflict. In
the case of D->F conversions, it will correctly delete all non-conflicting
files below the relevant directory and the directory itself (note that both
untracked and conflicting files below the directory will prevent its
removal). So if we handle D/F conflicts after all other conflicts, they
become fairly simple to handle -- we just need to check for whether or not
a path (file/directory) is in the way of creating the new content. We do
this by having process_entry() defer handling such entries to a subsequent
process_df_entry() step.
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This implements a simple merge strategy for submodule hashes. We check
whether one side of the merge candidates is already contained in the
other and then merge automatically.
If both sides contain changes we search for a merge in the submodule.
In case a single one exists we check that out and suggest it as the
merge resolution. A list of candidates is returned when we find multiple
merges that contain both sides of the changes.
This is useful for a workflow in which the developers can publish topic
branches in submodules and a separate maintainer merges them. In case
the developers always wait until their branch gets merged before tracking
them in the superproject all merges of branches that contain submodule
changes will be resolved automatically. If developers choose to track
their feature branch the maintainer might get a conflict but git will
search the submodule for a merge and suggest it/them as a resolution.
Signed-off-by: Heiko Voigt <hvoigt@hvoigt.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
If a file is modified due to normalization on one branch, and deleted on
another, a merge of the two branches will result in a delete/modify
conflict for that file even if it is otherwise unchanged.
Try to avoid the conflict by normalizing and comparing the "base" file
and the modified file when their sha1s differ. If they compare equal,
the file is considered unmodified and is deleted.
Signed-off-by: Eyvind Bernhardsen <eyvind.bernhardsen@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Update the definition and callers of string_list_lookup to use the
string_list as the first argument. This helps make the string_list
API easier to use by being more consistent.
Signed-off-by: Julian Phillips <julian@quantumfyre.co.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Update the definition and callers of string_list_insert to use the
string_list as the first argument. This helps make the string_list
API easier to use by being more consistent.
Signed-off-by: Julian Phillips <julian@quantumfyre.co.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
* pc/remove-warn:
Remove a redundant errno test in a usage of remove_path
Introduce remove_or_warn function
Implement the rmdir_or_warn function
Generalise the unlink_or_warn function
* pc/remove-warn:
Remove a redundant errno test in a usage of remove_path
Introduce remove_or_warn function
Implement the rmdir_or_warn function
Generalise the unlink_or_warn function
The errno test is redundant because the same test is carried
out in remove_path itself.
Signed-off-by: Peter Collingbourne <peter@pcc.me.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
git merge-recursive (and hence git merge) will present conflict hunks
in output something like what ‘diff3 -m’ produces if the
merge.conflictstyle configuration option is set to diff3.
There is a small difference from diff3: diff3 -m includes a label
for the merge base on the ||||||| line.
Tools familiar with the format and humans unfamiliar with the format
both can benefit from such a label. So mark the start of the text
from the merge bases with the heading "||||||| merged common
ancestors".
It would be nicer to use a more informative label. Perhaps someone
will provide one some day.
git rerere does not have trouble parsing the new output, and its
preimage ids are unchanged since it has its own code for re-creating
conflict hunks. No other code in git parses conflict hunks.
Requested-by: Stefan Monnier <monnier@iro.umontreal.ca>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Commands using the merge_trees() machinery will present conflict hunks
in output something like what ‘diff3 -m’ produces if the
merge.conflictstyle configuration option is set to diff3. The output
lacks the name of the merge base on the ||||||| line of the output,
and tools can misparse the conflict hunks without it. Add a new
o->ancestor parameter to merge_trees() for use as a label for the
ancestor in conflict hunks.
If o->ancestor is NULL, the output format is as before. All callers
pass NULL for now.
If o->ancestor is non-NULL and both branches renamed the base file
to the same name, that name is included in the conflict hunk labels.
Even if o->ancestor is NULL I think this would be a good change, but
this patch only does it in the non-NULL case to ensure the output
format does not change where it might matter.
Requested-by: Stefan Monnier <monnier@iro.umontreal.ca>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Commands using the ll_merge() function will present conflict hunks
imitating ‘diff3 -m’ output if the merge.conflictstyle configuration
option is set appropriately. Unlike ‘diff3 -m’, the output does not
include a label for the merge base on the ||||||| line of the output,
and some tools misparse the conflict hunks without that.
Add a new ancestor_label parameter to ll_merge() to give callers the
power to rectify this situation. If ancestor_label is NULL, the output
format is unchanged. All callers pass NULL for now.
Requested-by: Stefan Monnier <monnier@iro.umontreal.ca>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The following function is duplicated:
fill_mm
Move it to xdiff-interface.c and rename it 'read_mmblob', as suggested
by Junio C Hamano.
Also, change parameters order for consistency with read_mmfile().
Signed-off-by: Michael Lukashov <michael.lukashov@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
merge-recursive calls write_tree_from_memory() to come up with a virtual
tree, with possible conflict markers inside the blob contents, while
merging multiple common ancestors down. It is a bug to call the function
with unmerged entries in the index, even if the merge to come up with the
common ancestor resulted in conflicts. Otherwise the result won't be
expressible as a tree object.
We _might_ want to suggest the user to set GIT_MERGE_VERBOSITY to 5 and
re-run the merge in the message. At least we will know which part of
process_renames() or process_entry() functions is not correctly handling
the unmerged paths, and it might help us diagnosing the issue.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
* ap/merge-backend-opts:
Document that merge strategies can now take their own options
Extend merge-subtree tests to test -Xsubtree=dir.
Make "subtree" part more orthogonal to the rest of merge-recursive.
pull: Fix parsing of -X<option>
Teach git-pull to pass -X<option> to git-merge
git merge -X<option>
git-merge-file --ours, --theirs
Conflicts:
git-compat-util.h
This makes "subtree" more orthogonal to the rest of recursive merge, so
that you can use subtree and ours/theirs features at the same time. For
example, you can now say:
git merge -s subtree -Xtheirs other
to merge with "other" branch while shifting it up or down to match the
shape of the tree of the current branch, and resolving conflicts favoring
the changes "other" branch made over changes made in the current branch.
It also allows the prefix used to shift the trees to be specified using
the "-Xsubtree=$prefix" option. Giving an empty prefix tells the command
to figure out how much to shift trees automatically as we have always
done. "merge -s subtree" is the same as "merge -s recursive -Xsubtree="
(or "merge -s recursive -Xsubtree").
Based on an old patch done back in the days when git-merge was a script;
Avery ported the script part to builtin-merge.c. Bugs in shift_tree()
is mine.
Signed-off-by: Avery Pennarun <apenwarr@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Teach "-X <option>" command line argument to "git merge" that is passed to
strategy implementations. "ours" and "theirs" autoresolution introduced
by the previous commit can be asked to the recursive strategy.
Signed-off-by: Avery Pennarun <apenwarr@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The construction of the struct unpack_trees_error_msgs was done within
git_merge_trees(), which prevented using the same messages easily from
another function.
[jc: backported for 1.6.5 maint before advice_commit_before_merge]
Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
* mm/maint-hint-failed-merge:
user-manual: Document that "git merge" doesn't like uncommited changes.
merge-recursive: point the user to commit when file would be overwritten.
The commit-before-pull is well accepted in the DVCS community, but is
confusing some new users. This should get them back in the right way when
the problem occurs.
Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
We already have these checks in many printf-type functions that have
prototypes which are in header files. Add these same checks to some
more prototypes in header functions and to static functions in .c
files.
cc: Miklos Vajna <vmiklos@frugalware.org>
Signed-off-by: Tarmigan Casebolt <tarmigan+git@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When unpack_trees() three-way merge logic is called from merge-recursive
and finds that local changes are going to be clobbered, its plumbing level
messages were given as errors first, and then the merge driver added even
more scary message "fatal: merging of trees <a long object name> and
<another long object name> failed".
This is most often encountered by new CVS/SVN migrants who are used to
start a merge from a dirty work tree. The saddest part is that the merge
refused to run to prevent _any_ damage from being done to your work tree
when these messages are given, but the messages look a lot more scarier
than the conflicted case where the user needs to resolve them.
Replace the plumbing level messages so that they talk about what it is
protecting the user from, and end the messages with "Aborting." so that it
becomes clear that the command did not do any harm.
The final "merging of trees failed" message is superfluous, unless you are
interested in debugging the merge-recursive itself. Squelch the current
die() message by default, but allow it to help people who debug git with
verbosity level 4 or greater.
Unless there is some bug, an inner merge that does not touch working tree
should not trigger any such error, so emit the current die() message when
we see an error return from it while running the inner merge, too. It
would also help people who debug git.
We could later add instructions on how to recover (i.e. "stash changes
away or commit on a side branch and retry") instead of the silent
exit(128) I have in this patch, and then use Peff's advice.* mechanism to
squelch it (e.g. "advice.mergeindirtytree"), but they are separate topics.
Tested-by: Nanako Shiraishi <nanako3@lavabit.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When a branch moves A to B while the other branch created B (or moved C to
B), the code tried to rename one of them to B~something to preserve both
versions, and failed to register temporary resolution for the original
path B at stage#0 during virtual ancestor computation. This left the
index in unmerged state and caused a segfault.
A better solution is to merge these two versions of B's in place and use
the (potentially conflicting) result as the intermediate merge result in
the virtual ancestor.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
* tr/die_errno:
Use die_errno() instead of die() when checking syscalls
Convert existing die(..., strerror(errno)) to die_errno()
die_errno(): double % in strerror() output just in case
Introduce die_errno() that appends strerror(errno) to die()
Put filenames into the conflict markers only when they are different.
Otherwise they are redundant information clutter.
Print the filename explicitely when warning about a binary conflict.
Signed-off-by: Martin Renold <martinxyz@gmx.ch>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Change calls to die(..., strerror(errno)) to use the new die_errno().
In the process, also make slight style adjustments: at least state
_something_ about the function that failed (instead of just printing
the pathname), and put paths in single quotes.
Signed-off-by: Thomas Rast <trast@student.ethz.ch>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
There are a few remaining ones, but this fixes the trivial ones. It boils
down to two main issues that sparse complains about:
- warning: Using plain integer as NULL pointer
Sparse doesn't like you using '0' instead of 'NULL'. For various good
reasons, not the least of which is just the visual confusion. A NULL
pointer is not an integer, and that whole "0 works as NULL" is a
historical accident and not very pretty.
A few of these remain: zlib is a total mess, and Z_NULL is just a 0.
I didn't touch those.
- warning: symbol 'xyz' was not declared. Should it be static?
Sparse wants to see declarations for any functions you export. A lack
of a declaration tends to mean that you should either add one, or you
should mark the function 'static' to show that it's in file scope.
A few of these remain: I only did the ones that should obviously just
be made static.
That 'wt_status_submodule_summary' one is debatable. It has a few related
flags (like 'wt_status_use_color') which _are_ declared, and are used by
builtin-commit.c. So maybe we'd like to export it at some point, but it's
not declared now, and not used outside of that file, so 'static' it is in
this patch.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When you are trying to come up with the final result (i.e. depth=0), you
want to record how the conflict arose by registering the state of the
common ancestor, your branch and the other branch in the index, hence you
want to do update_stages().
When you are merging with positive depth, that is because of a criss-cross
merge situation. In such a case, you would need to record the tentative
result, with conflict markers and all, as if the merge went cleanly, even
if there are conflicts, in order to write it out as a tree object later to
be used as a common ancestor tree.
update_file() calls update_file_flags() with update_cache=1 to signal that
the result needs to be written to the index at stage #0 (i.e. merged), and
the code should not clobber the index further by calling update_stages().
The codepath to deal with rename/delete conflict in a recursive merge
however left the index unmerged.
Signed-off-by: Dave Olszewski <cxreg@pobox.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
We cannot represent the 3-way conflicted state in the work tree
for these entries, but it is normal not to have commit objects
for them in our repository. Just update the index and the life
will be good.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
* cb/maint-merge-recursive-submodule-fix:
simplify output of conflicting merge
update cache for conflicting submodule entries
add tests for merging with submodules
This simplifies the code without changing the semantics and removes
the unhelpful "needs $sha1" part of the conflicting submodule message.
Signed-off-by: Clemens Buchacher <drizzd@aon.at>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When merging merge bases during a recursive merge we do not want to
leave any unmerged entries. Otherwise we cannot create a temporary
tree for the recursive merge to work with.
We failed to do so in case of a submodule conflict between merge
bases, causing a NULL pointer dereference in the next step of the
recursive merge.
Signed-off-by: Clemens Buchacher <drizzd@aon.at>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
http-push.c::finish_request():
request is initialized by the for loop
index-pack.c::free_base_data():
b is initialized by the for loop
merge-recursive.c::process_renames():
move compare to narrower scope, and remove unused assignments to it
remove unused variable renames2
xdiff/xdiffi.c::xdl_recs_cmp():
remove unused variable ec
xdiff/xemit.c::xdl_emit_diff():
xche is always overwritten
Signed-off-by: Benjamin Kramer <benny.kra@googlemail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When the callback function invoked from read_tree_recursive() returns
the value `READ_TREE_RECURSIVE` for a gitlink entry, the traversal will
now continue into the tree connected to the gitlinked commit. This
functionality can be used to allow inter-repository operations, but
since the current users of read_tree_recursive() does not yet support
such operations, they have been modified where necessary to make sure
that they never return READ_TREE_RECURSIVE for gitlink entries (hence
no change in behaviour should be introduces by this patch alone).
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
* cb/maint-merge-recursive-fix:
merge-recursive: do not clobber untracked working tree garbage
modify/delete conflict resolution overwrites untracked file
Conflicts:
builtin-merge-recursive.c
When a file was renamed in one branch, but deleted in the other, one
should expect the index to contain an unmerged entry, namely the
target of the rename. Make it so.
Noticed by Constantine Plotnikov.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
* cb/maint-merge-recursive-fix:
merge-recursive: do not clobber untracked working tree garbage
modify/delete conflict resolution overwrites untracked file
This was originally implemented in c236bcd061
but was lost to a mismerge in 9ba929ed65.
Signed-off-by: Matt McCutchen <matt@mattmccutchen.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Many call sites use strbuf_init(&foo, 0) to initialize local
strbuf variable "foo" which has not been accessed since its
declaration. These can be replaced with a static initialization
using the STRBUF_INIT macro which is just as readable, saves a
function call, and takes up fewer lines.
Signed-off-by: Brandon Casey <casey@nrlssc.navy.mil>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
* bc/master-diff-hunk-header-fix:
Clarify commit error message for unmerged files
Use strchrnul() instead of strchr() plus manual workaround
Use remove_path from dir.c instead of own implementation
Add remove_path: a function to remove as much as possible of a path
git-submodule: Fix "Unable to checkout" for the initial 'update'
Clarify how the user can satisfy stash's 'dirty state' check.
t4018-diff-funcname: test syntax of builtin xfuncname patterns
t4018-diff-funcname: test syntax of builtin xfuncname patterns
make "git remote" report multiple URLs
diff hunk pattern: fix misconverted "\{" tex macro introducers
diff: fix "multiple regexp" semantics to find hunk header comment
diff: use extended regexp to find hunk headers
diff: use extended regexp to find hunk headers
diff.*.xfuncname which uses "extended" regex's for hunk header selection
diff.c: associate a flag with each pattern and use it for compiling regex
diff.c: return pattern entry pointer rather than just the hunk header pattern
Conflicts:
builtin-merge-recursive.c
t/t7201-co.sh
xdiff-interface.h
* maint:
Remove empty directories in recursive merge
Documentation: clarify the details of overriding LESS via core.pager
Conflicts:
builtin-merge-recursive.c
We now just leave the object->sha1 field of virtual commits 0{40} as it
is initialized, as a unique hash is not necessary in case of virtual
commits.
Signed-off-by: Miklos Vajna <vmiklos@frugalware.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
struct merge_options already has a call_depth member, and index_only
global variable always equals to !!call_depth.
We always use index_only as a condition, so we can just
use call_depth instead of index_only.
Signed-off-by: Miklos Vajna <vmiklos@frugalware.org>
This makes it possible to avoid passing the labels of branches as
arguments to merge_recursive(), merge_trees() and
merge_recursive_generic().
It also takes care of subtree merge, output buffering, verbosity, and
rename limits - these were global variables till now in
merge-recursive.c.
A new function, named init_merge_options(), is introduced as well, it
clears the struct merge_info, then initializes with default values,
finally updates the default values based on the config and environment
variables.
Signed-off-by: Miklos Vajna <vmiklos@frugalware.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
merge_recursive_generic() takes, in comparison to to merge_recursive(),
no commit ("struct commit *") arguments but SHA ids ("unsigned char *"),
and no commit list of bases but an array of refs ("const char **").
This makes it more generic in the case that it can also take the SHA
of a tree to merge trees without commits, for the bases, the head
and the remote.
merge_recursive_generic() also handles locking and updating of the
index, which is a common use case of merge_recursive().
This patch also rewrites builtin-merge-recursive.c to make use of
merge_recursive_generic(). By doing this, I stumbled over the
limitation of 20 bases and I've added a warning if this limitation
is exceeded.
This patch qualifies make_virtual_commit() as static again because
this function is not needed anymore outside merge-recursive.c.
Signed-off-by: Stephan Beyer <s-beyer@gmx.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Move most of the of code from builtin-merge-recursive.c to a new file
merge-recursive.c and introduce merge_recursive_setup() in there so that
builtin-merge-recursive and other builtins call it.
Signed-off-by: Miklos Vajna <vmiklos@frugalware.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This makes write_tree_from_memory(), which writes the active cache as
a tree and returns the struct tree for it, available to other code. It
also makes available merge_trees(), which does the internal merge of
two trees with a known base, and merge_recursive(), which does the
recursive internal merge of two commits with a list of common
ancestors.
The first two of these will be used by checkout -m, and the third is
presumably useful in general, although the implementation of checkout
-m which entirely matches the behavior of the shell version does not
use it (since it ignores the difference of ancestry between the old
branch and the new branch).
Signed-off-by: Daniel Barkalow <barkalow@iabervon.org>
This converts the index explicitly on read and write to its on-disk
format, allowing the in-core format to contain more flags, and be
simpler.
In particular, the in-core format is now host-endian (as opposed to the
on-disk one that is network endian in order to be able to be shared
across machines) and as a result we can dispense with all the
htonl/ntohl on accesses to the cache_entry fields.
This will make it easier to make use of various temporary flags that do
not exist in the on-disk format.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
When merging conflicting submodule changes from a supermodule, generate
a conflict message saying what went wrong. Also leave the tree in a state
where git status shows the conflict, and git submodule status gives the user
enough information to do the merge manally. Previously this would just fail.
Signed-off-by: Finn Arne Gangstad <finnag@pvv.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
merge-recursive did not support merging trees that have conflicting
changes in submodules they contain, and died. Support it exactly the
same way as how it handles conflicting symbolic link changes --- mark it
as a conflict, take the tentative result from the current side, and
letting the caller resolve the conflict, without dying in merge_file()
function.
Also reword the error message issued when merge_file() has to die
because it sees a tree entry of type it does not support yet.
[jc: fixed up initial draft by Finn Arne Gangstad]
Signed-off-by: Junio C Hamano <gitster@pobox.com>
reverse_diff was a bit-value in disguise, it's merged in the flags now.
Signed-off-by: Pierre Habouzit <madcoder@debian.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
* maint:
RelNotes-1.5.3.5: describe recent fixes
merge-recursive.c: mrtree in merge() is not used before set
sha1_file.c: avoid gcc signed overflow warnings
Fix a small memory leak in builtin-add
honor the http.sslVerify option in shell scripts
The called function merge_trees() sets its *result, to which the
address of the variable mrtree in merge() function is passed,
only when index_only is set. But that is Ok as the function
uses the value in the variable only under index_only iteration.
However, recent gcc does not realize this. Work it around by
adding a fake initializer.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
* ph/strbuf: (44 commits)
Make read_patch_file work on a strbuf.
strbuf_read_file enhancement, and use it.
strbuf change: be sure ->buf is never ever NULL.
double free in builtin-update-index.c
Clean up stripspace a bit, use strbuf even more.
Add strbuf_read_file().
rerere: Fix use of an empty strbuf.buf
Small cache_tree_write refactor.
Make builtin-rerere use of strbuf nicer and more efficient.
Add strbuf_cmp.
strbuf_setlen(): do not barf on setting length of an empty buffer to 0
sq_quote_argv and add_to_string rework with strbuf's.
Full rework of quote_c_style and write_name_quoted.
Rework unquote_c_style to work on a strbuf.
strbuf API additions and enhancements.
nfv?asprintf are broken without va_copy, workaround them.
Fix the expansion pattern of the pseudo-static path buffer.
builtin-for-each-ref.c::copy_name() - do not overstep the buffer.
builtin-apply.c: fix a tiny leak introduced during xmemdupz() conversion.
Use xmemdupz() in many places.
...
The function make_cache_entry() is too useful to be hidden away in
merge-recursive. So move it to libgit.a (exposing it via cache.h).
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
It might be a sign of source code management gone bad, but when two branches
has diverged almost beyond recognition and time has come for the branches to
merge, the user is going to need all the help his tool can give him. Honoring
diff.renamelimit has great potential as a painkiller in such situations.
The painkiller effect could have been achieved by e.g. 'merge.renamelimit',
but the flexibility gained by a separate option is questionable: our user
would probably expect git to detect renames equally good when merging as
when diffing (I known I did).
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
