merge_trees() did a variety of work, including:
* Calling get_unmerged() to get unmerged entries
* Calling record_df_conflict_files() with all unmerged entries to
do some work to ensure we could handle D/F conflicts correctly
* Calling get_renames() to check for renames.
An easily overlooked issue is that get_renames() can create more
unmerged entries and add them to the list, which have the possibility of
being involved in D/F conflicts. So the call to
record_df_conflict_files() should really be moved after all the rename
detection. I didn't come up with any testcases demonstrating any bugs
with the old ordering, but I suspect there were some for both normal
renames and for directory renames. Fix the ordering.
Reviewed-By: Stefan Beller <sbeller@google.com>
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When merging another branch into ours, if their tree is the same as
the common ancestor's, we can declare that our tree represents the
result of three-way merge. In such a case, the recursive merge
backend incorrectly used to create a commit out of our index, even
when the index has changes.
A recent fix attempted to prevent this by adding a comparison
between "our" tree and the index, but forgot that this check must be
restricted only to the outermost merge. Inner merges performed by
the recursive backend across merge bases are by definition made from
scratch without having any local changes added to the index. The
call to index_has_changes() during an inner merge is working on the
index that has no relation to the merge being performed, preventing
legitimate merges from getting carried out.
Fix it by limiting the check to the outermost merge.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
* ew/empty-merge-with-dirty-index-maint:
merge-recursive: avoid incorporating uncommitted changes in a merge
move index_has_changes() from builtin/am.c to merge.c for reuse
t6044: recursive can silently incorporate dirty changes in a merge
builtin/merge.c contains this important requirement for merge strategies:
/*
* At this point, we need a real merge. No matter what strategy
* we use, it would operate on the index, possibly affecting the
* working tree, and when resolved cleanly, have the desired
* tree in the index -- this means that the index must be in
* sync with the head commit. The strategies are responsible
* to ensure this.
*/
merge-recursive does not do this check directly, instead it relies on
unpack_trees() to do it. However, merge_trees() has a special check for
the merge branch exactly matching the merge base; when it detects that
situation, it returns early without calling unpack_trees(), because it
knows that the HEAD commit already has the correct result. Unfortunately,
it didn't check that the index matched HEAD, so after it returned, the
outer logic ended up creating a merge commit that included something
other than HEAD.
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The code internal to the recursive merge strategy was not fully
prepared to see a path that is renamed to try overwriting another
path that is only different in case on case insensitive systems.
This does not matter in the current code, but will start to matter
once the rename detection logic starts taking hints from nearby
paths moving to some directory and moves a new path along with them.
* en/merge-recursive-icase-removal:
merge-recursive: ignore_case shouldn't reject intentional removals
An infrastructure to define what hash function is used in Git is
introduced, and an effort to plumb that throughout various
codepaths has been started.
* bc/hash-algo:
repository: fix a sparse 'using integer as NULL pointer' warning
Switch empty tree and blob lookups to use hash abstraction
Integrate hash algorithm support with repo setup
Add structure representing hash algorithm
setup: expose enumerated repo info
The three-way merge performed by "git cherry-pick" was confused
when a new submodule was added in the meantime, which has been
fixed (or "papered over").
* sb/test-cherry-pick-submodule-getting-in-a-way:
merge-recursive: handle addition of submodule on our side of history
t/3512: demonstrate unrelated submodule/file conflict as cherry-pick failure
The "diff" family of commands learned to ignore differences in
carriage return at the end of line.
* jc/ignore-cr-at-eol:
diff: --ignore-cr-at-eol
xdiff: reassign xpparm_t.flags bits
In commit ae352c7f3 (merge-recursive.c: fix case-changing merge bug,
2014-05-01), it was observed that removing files could be problematic on
case insensitive file systems, because we could end up removing files
that differed in case only rather than deleting the intended file --
something that happened when files were renamed on one branch in a way
that differed only in case. To avoid that problem, that commit added
logic to avoid removing files other than the one intended, rejecting the
removal if the files differed only in case.
Unfortunately, the logic it used didn't fully implement that condition as
stated above; instead it merely checked that a case-insensitive lookup of
the file that was requested resulted in finding a file in the index at
stage 0, not that the file found in the index actually differed in case.
Alternatively, one could view the implementation as making an implicit
assumption that the file we actually wanted to remove would never appear
in the index with a stage of 0, and thus that if we found a file with our
lookup, that it had to be a different file (but different in case only).
The net result of this implementation is that it can ignore more requests
than it should, leaving a file around in the working copy that should
have been removed. Make sure that the file found in the index actually
differs in case before silently ignoring the request to remove the file.
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The code for a newly added path assumed that the path was a normal file,
and thus checked for there being a directory still being in the way of
the file. Note that since unpack_trees() does path-in-the-way checks
already, the only way for there to be a directory in the way at this
point in the code, is if there is some kind of D/F conflict in the merge.
For a submodule addition on HEAD's side of history, the submodule would
have already been present. This means that we do expect there to be a
directory present but should not consider it to be "in the way"; instead,
it's the expected submodule. So, when there's a submodule addition from
HEAD's side, don't bother checking the working copy for a directory in
the way.
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Switch the uses of empty_tree_oid and empty_blob_oid to use the
current_hash abstraction that represents the current hash algorithm in
use.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
A single-word "unsigned flags" in the diff options is being split
into a structure with many bitfields.
* bw/diff-opt-impl-to-bitfields:
diff: make struct diff_flags members lowercase
diff: remove DIFF_OPT_CLR macro
diff: remove DIFF_OPT_SET macro
diff: remove DIFF_OPT_TST macro
diff: remove touched flags
diff: add flag to indicate textconv was set via cmdline
diff: convert flags to be stored in bitfields
add, reset: use DIFF_OPT_SET macro to set a diff flag
A new option --ignore-cr-at-eol tells the diff machinery to treat a
carriage-return at the end of a (complete) line as if it does not
exist.
Just like other "--ignore-*" options to ignore various kinds of
whitespace differences, this will help reviewing the real changes
you made without getting distracted by spurious CRLF<->LF conversion
made by your editor program.
Helped-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
[jch: squashed in command line completion by Dscho]
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Remove the `DIFF_OPT_CLR` macro and instead set the flags directly.
This conversion is done using the following semantic patch:
@@
expression E;
identifier fld;
@@
- DIFF_OPT_CLR(&E, fld)
+ E.flags.fld = 0
@@
type T;
T *ptr;
identifier fld;
@@
- DIFF_OPT_CLR(ptr, fld)
+ ptr->flags.fld = 0
Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Remove the `DIFF_OPT_SET` macro and instead set the flags directly.
This conversion is done using the following semantic patch:
@@
expression E;
identifier fld;
@@
- DIFF_OPT_SET(&E, fld)
+ E.flags.fld = 1
@@
type T;
T *ptr;
identifier fld;
@@
- DIFF_OPT_SET(ptr, fld)
+ ptr->flags.fld = 1
Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Get rid of the duplicated getenv('GIT_MERGE_VERBOSITY') calls with the same
constant string argument. This makes code more readable and prevents typo in
the further development.
Signed-off-by: Andrey Okoshkin <a.okoshkin@samsung.com>
Reviewed-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
There is no longer any need to allocate and leak a `struct lock_file`.
The previous patch addressed an instance where we needed a minor tweak
alongside the trivial changes.
Deal with the remaining instances where we allocate and leak a struct
within a single function. Change them to have the `struct lock_file` on
the stack instead.
These instances were identified by running `git grep "^\s*struct
lock_file\s*\*"`.
Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
A leakfix and code clean-up.
* kw/merge-recursive-cleanup:
merge-recursive: change current file dir string_lists to hashmap
merge-recursive: remove return value from get_files_dirs
merge-recursive: fix memory leak
The code was using two string_lists, one for the directories and
one for the files. The code never checks the lists independently
so we should be able to only use one list. The string_list also
is a O(log n) for lookup and insertion. Switching this to use a
hashmap will give O(1) which will save some time when there are
millions of paths that will be checked.
Signed-off-by: Kevin Willford <kewillf@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The return value of the get_files_dirs call is never being used.
Looking at the history of the file and it was originally only
being used for debug output statements. Also when
read_tree_recursive return value is non zero it is changed to
zero. This leads me to believe that it doesn't matter if
read_tree_recursive gets an error.
Since the debug output has been removed and the caller isn't
checking the return value there is no reason to keep calculating
and returning a value.
Signed-off-by: Kevin Willford <kewillf@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
In merge_trees if process_renames or process_entry returns less
than zero, the method will just return and not free re_merge,
re_head, or entries.
This change cleans up the allocated variables before returning
to the caller.
Signed-off-by: Kevin Willford <kewillf@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Follow the Oxford style, which says to use "up-to-date" before the noun,
but "up to date" after it. Don't change plumbing (specifically
send-pack.c, but transport.c (git push) also has the same string).
This was produced by grepping for "up-to-date" and "up to date". It
turned out we only had to edit in one direction, removing the hyphens.
Fix a typo in Documentation/git-diff-index.txt while we're there.
Reported-by: Jeffrey Manian <jeffrey.manian@gmail.com>
Reported-by: STEVEN WHITE <stevencharleswhitevoices@gmail.com>
Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Instead of implementing this on our own, just use a convenience macro.
Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Fix configuration codepath to pay proper attention to commondir
that is used in multi-worktree situation, and isolate config API
into its own header file.
* bw/config-h:
config: don't implicitly use gitdir or commondir
config: respect commondir
setup: teach discover_git_directory to respect the commondir
config: don't include config.h by default
config: remove git_config_iter
config: create config.h
Code clean-up.
* bw/ls-files-sans-the-index:
ls-files: factor out tag calculation
ls-files: factor out debug info into a function
ls-files: convert show_files to take an index
ls-files: convert show_ce_entry to take an index
ls-files: convert prune_cache to take an index
ls-files: convert ce_excluded to take an index
ls-files: convert show_ru_info to take an index
ls-files: convert show_other_files to take an index
ls-files: convert show_killed_files to take an index
ls-files: convert write_eolinfo to take an index
ls-files: convert overlay_tree_on_cache to take an index
tree: convert read_tree to take an index parameter
convert: convert renormalize_buffer to take an index
convert: convert convert_to_git to take an index
convert: convert convert_to_git_filter_fd to take an index
convert: convert crlf_to_git to take an index
convert: convert get_cached_convert_stats_ascii to take an index
Stop including config.h by default in cache.h. Instead only include
config.h in those files which require use of the config system.
Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Convert the lookup_tree function to take a pointer to struct object_id.
The commit was created with manual changes to tree.c, tree.h, and
object.c, plus the following semantic patch:
@@
@@
- lookup_tree(EMPTY_TREE_SHA1_BIN)
+ lookup_tree(&empty_tree_oid)
@@
expression E1;
@@
- lookup_tree(E1.hash)
+ lookup_tree(&E1)
@@
expression E1;
@@
- lookup_tree(E1->hash)
+ lookup_tree(E1)
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This is a caller of lookup_commit_reference, which we will convert
later.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Convert the sha1 member of struct cache_tree to struct object_id by
changing the definition and applying the following semantic patch, plus
the standard object_id transforms:
@@
struct cache_tree E1;
@@
- E1.sha1
+ E1.oid.hash
@@
struct cache_tree *E1;
@@
- E1->sha1
+ E1->oid.hash
Fix up one reference to active_cache_tree which was not automatically
caught by Coccinelle. These changes are prerequisites for converting
parse_object.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When "git merge" detects a path that is renamed in one history
while the other history deleted (or modified) it, it now reports
both paths to help the user understand what is going on in the two
histories being merged.
* mm/merge-rename-delete-message:
merge-recursive: make "CONFLICT (rename/delete)" message show both paths
Apply the semantic patch swap.cocci to convert hand-rolled swaps to use
the macro SWAP. The resulting code is shorter and easier to read, the
object code is effectively unchanged.
The patch for object.c had to be hand-edited in order to preserve the
comment before the change; Coccinelle tried to eat it for some reason.
Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The current message printed by "git merge-recursive" for a rename/delete
conflict is like this:
CONFLICT (rename/delete): new-path deleted in HEAD and renamed in
other-branch. Version other-branch of new-path left in tree.
To be more helpful, the message should show both paths of the rename and
state that the deletion occurred at the old path, not the new path. So
change the message to the following format:
CONFLICT (rename/delete): old-path deleted in HEAD and renamed to
new-path in other-branch. Version other-branch of new-path left in tree.
Since this doubles the number of cases in handle_change_delete (modify vs.
rename), refactor the code to halve the number of cases again by merging the
cases where o->branch1 has the change and o->branch2 has the delete with the
cases that are the other way around.
Also add a simple test of the new conflict message.
Signed-off-by: Matt McCutchen <matt@mattmccutchen.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Fix a corner case in merge-recursive regression that crept in
during 2.10 development cycle.
* jc/renormalize-merge-kill-safer-crlf:
convert: git cherry-pick -Xrenormalize did not work
merge-recursive: handle NULL in add_cacheinfo() correctly
cherry-pick: demonstrate a segmentation fault
Git 2.11 had a minor regression in "merge --ff-only" that competed
with another process that simultanously attempted to update the
index. We used to explain what went wrong with an error message,
but the new code silently failed. The error message has been
resurrected.
* jc/lock-report-on-error:
lockfile: LOCK_REPORT_ON_ERROR
hold_locked_index(): align error handling with hold_lockfile_for_update()
wt-status: implement opportunisitc index update correctly
Fix a corner case in merge-recursive regression that crept in
during 2.10 development cycle.
* jc/renormalize-merge-kill-safer-crlf:
convert: git cherry-pick -Xrenormalize did not work
merge-recursive: handle NULL in add_cacheinfo() correctly
cherry-pick: demonstrate a segmentation fault
Callers of the hold_locked_index() function pass 0 when they want to
prepare to write a new version of the index file without wishing to
die or emit an error message when the request fails (e.g. somebody
else already held the lock), and pass 1 when they want the call to
die upon failure.
This option is called LOCK_DIE_ON_ERROR by the underlying lockfile
API, and the hold_locked_index() function translates the paramter to
LOCK_DIE_ON_ERROR when calling the hold_lock_file_for_update().
Replace these hardcoded '1' with LOCK_DIE_ON_ERROR and stop
translating. Callers other than the ones that are replaced with
this change pass '0' to the function; no behaviour change is
intended with this patch.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
Among the callers of hold_locked_index() that passes 0:
- diff.c::refresh_index_quietly() at the end of "git diff" is an
opportunistic update; it leaks the lockfile structure but it is
just before the program exits and nobody should care.
- builtin/describe.c::cmd_describe(),
builtin/commit.c::cmd_status(),
sequencer.c::read_and_refresh_cache() are all opportunistic
updates and they are OK.
- builtin/update-index.c::cmd_update_index() takes a lock upfront
but we may end up not needing to update the index (i.e. the
entries may be fully up-to-date), in which case we do not need to
issue an error upon failure to acquire the lock. We do diagnose
and die if we indeed need to update, so it is OK.
- wt-status.c::require_clean_work_tree() IS BUGGY. It asks
silence, does not check the returned value. Compare with
callsites like cmd_describe() and cmd_status() to notice that it
is wrong to call update_index_if_able() unconditionally.
Merge-recursive sorts a string list using a raw qsort(), where it
feeds the "items" from one struct but the "nr" and size fields from
another struct. This isn't a bug because one list is a copy of the
other, but it's unnecessarily confusing (and also caused our recent
QSORT() cleanups via coccinelle to miss this call site).
Let's use string_list_sort() instead, which is more concise and harder
to get wrong. Note that we need to adjust our comparison function,
which gets fed only the strings now, not the string_list_items. That's
OK because we don't use the "util" field as part of our sort.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
1335d76e45 ("merge: avoid "safer crlf" during recording of merge
results", 2016-07-08) tried to split make_cache_entry() call made
with CE_MATCH_REFRESH into a call to make_cache_entry() without one,
followed by a call to add_cache_entry(), refresh_cache() and another
add_cache_entry() as needed. However the conversion was botched in
that it forgot that refresh_cache() can return NULL, which was
handled correctly in make_cache_entry() but in the updated code.
This fixes https://github.com/git-for-windows/git/issues/952
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When a submodule is being merged or cherry-picked into a working
tree that already contains a corresponding empty directory, do not
record a conflict.
One situation where this bug appears is:
- Commit 1 adds a submodule
- Commit 2 removes that submodule and re-adds it into a subdirectory
(sub1 to sub1/sub1).
- Commit 3 adds an unrelated file.
Now the user checks out commit 1 (first deinitializing the submodule),
and attempts to cherry-pick commit 3. Previously, this would fail,
because the incoming submodule sub1/sub1 would falsely conflict with
the empty sub1 directory.
This patch ignores the empty sub1 directory, fixing the bug. We only
ignore the empty directory if the object being emplaced is a
submodule, which expects an empty directory.
Signed-off-by: David Turner <dturner@twosigma.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Call strbuf_add_unique_abbrev() to add abbreviated hashes to strbufs
instead of taking detours through find_unique_abbrev() and its static
buffer. This is shorter in most cases and a bit more efficient.
The changes here are not easily handled by a semantic patch because
they involve removing temporary variables and deconstructing format
strings for strbuf_addf().
Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
