Commit Graph

1097 Commits (834df6c69b82c5cd9de3578048769e2fd27c5351)

Author SHA1 Message Date
Junio C Hamano 834df6c69b Merge branch 'en/no-amend-during-conflicts' into jch
Teach 'am', 'revert', and 'rebase' that running 'commit --amend' or a
partial 'commit <paths>' makes no sense during operations that stop
and return control to the user to resolve conflicts left in the
working tree, just like 'cherry-pick' and 'merge' do.

* en/no-amend-during-conflicts:
  commit: refuse partial commits during conflict resolution
  commit: refuse to amend during conflict resolution
  commit: reword the empty-commit rebase amend error
  commit: allow a partial commit when a rebase pick becomes empty
  commit: clarify FROM_REBASE_PICK and is_from_rebase() names
2026-08-31 11:12:03 -07:00
Junio C Hamano a9463c05e2 Merge branch 'hn/checkout-m-autostash-refine' into jch
The autostash fallback in 'git checkout -m' has been refined to only
retry when there are local changes.  Additionally, a blank line now
visually separates autostash conflict advice from the subsequent
branch-switch message.

* hn/checkout-m-autostash-refine:
  checkout: print blank line after autostash conflict advice
2026-08-31 11:12:00 -07:00
Harald Nordgren a2fc10f7f9 checkout: print blank line after autostash conflict advice
When "git checkout -m" stashes the user's local changes and then fails
to re-apply them because of conflicts, the conflict advice is printed
directly on top of the branch-switch message ("Switched to branch ..."),
making the two messages hard to tell apart.  Print a blank line in
between when the stash apply conflicted, so that the advice and the
branch-switch message are visually distinct.

To learn whether the stash apply resulted in conflicts, make the
autostash apply functions return 1 when the stash could not be applied
due to conflicts (and was stored back), while success and error remain
0 and -1 respectively.  Checkout can then use the return value to decide
whether to print the blank line.

Signed-off-by: Harald Nordgren <haraldnordgren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-08-31 07:53:09 -07:00
Elijah Newren 4540e759d0 commit: refuse to amend during conflict resolution
Running `git commit --amend` during conflict resolution is an ugly
foot-gun.  For many years, we have rejected amending during conflict
resolution in the middle of
  - a merge
  - a cherry-pick
However, this was never extended to other operations that can also
produce conflicts:
  - an `am` operation
  - a revert
  - a rebase

Extend it to handle these other cases now.

Extending to `am`, revert, and the apply backend of rebase are fairly
straightforward.  However, with the merge backend of rebase we have to
be more careful, since it powers interactive rebases and
  - the interactive machinery internally uses `git commit --amend` for
    `squash` and `reword` directives
  - users are expected to `git commit --amend` after hitting an `edit`
    or `break` directive
So, we need to be careful with rebase to only reject amending when doing
conflict resolution.

A few files under the rebase-merge/ directory provide us the necessary
information:

  - stopped-sha is written only when the rebase stops and hands control
    back to the user, so its presence marks a genuine stop -- as opposed
    to the sequencer's own internal `git commit --amend` while applying
    a squash, fixup, or reword, during which no stopped-sha exists.

  - amend is written only when the rebase stops with HEAD already
    pointing at the commit the user is meant to amend: a clean `edit`,
    or a fast-forward `reword`.  Its absence at a stop therefore means
    the commit did not apply, so HEAD is the previously-applied commit
    rather than the one being rebased -- exactly the case we refuse.

So for the merge backend we die when stopped-sha exists and amend does
not.  This covers a plain conflicted pick as well as a conflicted `edit`
(both leave HEAD on the previously-applied commit), while still allowing
a clean `edit` or `reword` stop and a `break` stop (no stopped-sha).
stopped-sha is unlinked at the start of the resume loop, so a resumed
squash's internal amend is unaffected.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-08-28 08:35:22 -07:00
Elijah Newren ad3a039c31 commit: clarify FROM_REBASE_PICK and is_from_rebase() names
Commit 430b75f720 (commit: give correct advice for empty commit during
a rebase, 2019-12-06) introduced a FROM_REBASE_PICK enum value and an
is_from_rebase() function.  Those names failed to convey that they were
specifically about hitting a commit that becomes empty when rebasing.
Clarify their names now.

While at it, change `whence == FROM_REBASE_EMPTY` to use
`is_from_rebase_empty(whence)`.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-08-28 08:35:22 -07:00
Junio C Hamano 15b23b50a6 Merge branch 'en/sequencer-lose-pretty-given'
The setting of a now-unused member '.pretty_given' in the sequencer
machinery has been removed.

* en/sequencer-lose-pretty-given:
  sequencer: remove unnecessary variable setting
2026-08-24 13:17:50 -07:00
Johannes Schindelin 65cda10d5b sequencer: release the ODB before spawning git commit
As of 4557f1add2 (rebase--helper: add a builtin helper for interactive
rebases, 2017-02-09), continuing an interactive rebase uses the builtin
sequencer, which spawns `git commit`.

The child may trigger auto-maintenance, which may need to replace files
for which the sequencer still holds resources. See
https://github.com/git-for-windows/git/issues/6315: on Windows, this
produces unlink retry prompts that cannot succeed while the sequencer
waits for the child.

Resources such as file handles or memory mappings must be released
before spawning a command that may run auto-maintenance, as established
by 28d04e1ec1 (run-command: offer to close the object store before
running, 2021-09-09): release the ODB file handles and memory mappings,
so that auto-gc can repack (potentially deleting existing packfiles in
the process); If the sequencer needs to access the ODB afterwards, it
will gracefully (re-)open the ODB.

Release the sequencer's ODB before spawning `git commit`. The regression
test uses the legacy-delete trick introduced by 69ed0e35a7 (mingw:
optionally use legacy (non-POSIX) delete semantics, 2026-05-07) to
trigger the failure on modern Windows.

Assisted-by: GPT-5.6 Sol
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-08-12 09:07:03 -07:00
Elijah Newren 14058ed717 sequencer: remove unnecessary variable setting
revs.pretty_given is only ever read in builtin/log.c, and nothing from
builtin/log.c is ever called from sequencer.c.  So setting this variable
cannot do anything.

This was introduced in commit 62db524779 ("rebase -i: generate the
script via rebase--helper", 2017-07-14), which used `git rev-list` even
though its commit message describes the logic as having been based on
`git log`.  Because of this, I am guessing this line was copied or
ported from part of builtin/log.c without recognizing that this line was
not doing anything and could be removed.

It's certainly not doing anything now, though, so remove it.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-08-12 07:22:56 -07:00
Junio C Hamano 524d5ad5ed Merge branch 'pw/rebase-fixup-fixes'
Two bugs in how 'git rebase' handles skipped 'fixup' and 'squash'
commands have been fixed.  One bug caused an incorrect commit count to
be shown in the template message when multiple commands were skipped,
and another prevented the editor from opening when the final command
in a chain containing 'fixup -c' was skipped.

* pw/rebase-fixup-fixes:
  rebase: remember fixup -c after skipping fixup/squash
  rebase -i: fix counting of fixups after rebase --skip
2026-08-05 11:10:51 -07:00
Junio C Hamano f364885cb3 Merge branch 'pw/rebase-drop-notes-with-commit'
The rebase post-rewrite notes-copying logic has been corrected.  When
a commit is dropped during rebase (e.g., because its changes are
already upstream), it is no longer recorded as rewritten, preventing
its notes from being copied to an unrelated commit.

* pw/rebase-drop-notes-with-commit:
  sequencer: do not record dropped commits as rewritten
  sequencer: use an enum to represent result of picking a commit
  sequencer: simplify pick_one_commit()
  sequencer: remove unnecessary condition in pick_one_commit()
  sequencer: simplify handling of fixup with conflicts
  sequencer: remove unnecessary "or" in pick_one_commit()
  sequencer: never reschedule on failed commit
  sequencer: be more careful with external merge
  t3400: restore coverage for note copying with apply backend
2026-07-27 09:09:01 -07:00
Phillip Wood 4a3a8ee96c rebase: remember fixup -c after skipping fixup/squash
When the final command in a chain of "fixup" and "squash" commands
is skipped, we should prompt the user to edit the commit message
if the chain contains a "fixup -c" command that was not skipped.
Unfortunately, commit_staged_changes() only looks for completed "squash"
commands and so does not prompt the user to edit the message. Fix
this by recording whether a fixup command has the "-c" flag set and
then checking whether we have seen either a "fixup -c" or a "squash"
command. Add regression tests for skipping a command in the middle
of the chain (which currently works but has no test coverage), and
for skipping the final command (which is fixed by this patch).

Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-07-26 14:02:01 -07:00
Phillip Wood 2f5ff2c339 rebase -i: fix counting of fixups after rebase --skip
When the sequencer processes a chain of "fixup" and "squash" commands
it keeps a list of the commands that have been executed. If there are
conflicts, then the list is saved when the rebase stops for the user to
resolve them. When the rebase resumes, the list is loaded and is used
to initialize the count of how many "fixup" and "squash" commands have
been processed; if a command has been skipped with "git rebase --skip",
then the last command needs to be popped off the end of the list.

To count the number of commands, commit_staged_changes() uses the
number of newlines in the file plus one. This is due to the slightly
unusual way the list is constructed - instead of appending a newline
when a command is added, a newline is inserted before the command
if the current count is greater than zero. Therefore, when we pop a
skipped command off the list, we should also remove the newline that
precedes it. Otherwise, when a new command is added, a blank line
will be left before it, which will contribute to the fixup count the
next time the file is read. Unfortunately, the preceding newline is
not removed, leading to an incorrect count. Fix this by removing the
newline that appears before the skipped command.

In addition to fixing the code that removes a skipped command from the
list, the code that reads the list is fixed to skip blank lines. We
have had reports of users starting a rebase with one version of
git and continuing it with another. Often this happens because the
version of git bundled with an IDE or TUI differs from the one used
at the command line. By fixing both the reading and writing ends of
the problem we ensure the count is correct when an older version of
git reads the fixup file written by a newer version and vice versa.

Triggering the incorrect count requires the user to skip two "fixup" or
"squash" commands before the final command in the chain. An existing
test is extended to prevent future regressions. The consequence of
miscounting is not serious: we just print the wrong count in the
header of the commit message template.

Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-07-26 14:02:01 -07:00
Patrick Steinhardt 0717b3595d copy: drop dependency on `the_repository`
When copying a file we need to potentially adapt permissions of the new
file based on whether or not "core.shared" is enabled. Parsing this
configuration makes us implicitly depend on `the_repository`.

Refactor the code to instead require the caller to pass in a repository
so that we can remove `USE_THE_REPOSITORY_VARIABLE`.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-07-16 14:10:08 -07:00
Junio C Hamano 955b276e05 Merge branch 'ps/history-drop'
The experimental 'git history' command has been taught a new 'drop'
subcommand to remove a commit, with its descendants replayed onto its
parent.

* ps/history-drop:
  builtin/history: implement "drop" subcommand
  builtin/history: split handling of ref updates into two phases
  replay: expose `replay_result_queue_update()`
  reset: stop assuming that the caller passes in a clean index
  reset: allow the caller to specify the current HEAD object
  reset: introduce ability to skip updating HEAD
  reset: introduce dry-run mode
  reset: modernize flags passed to `reset_working_tree()`
  reset: rename `reset_head()`
  reset: drop `USE_THE_REPOSITORY_VARIABLE`
  read-cache: split out function to drop unmerged entries to stage 0
2026-07-15 13:24:19 -07:00
Phillip Wood 42554b78fd sequencer: do not record dropped commits as rewritten
If a commit gets dropped because its changes are already upstream
then we should not record it as rewritten. As well as confusing any
post-rewrite hooks, it means we end up copying the notes from the
dropped commit to the commit that was picked immediately before the
one that was dropped.

While we do not want to record the dropped commit as rewritten, if
it is the final commit in a chain of fixups then we need to flush
the list of rewritten commits. The behavior of an "edit" command
where the commit is dropped is changed so that "rebase --continue"
will not amend the previous pick. However, as the code comment notes
it will still be erroneously recorded as rewritten when the rebase
continues. That will need to be addressed separately along with not
recording skipped commits as rewritten.

The initialization of "drop_commit" is moved to ensure it is initialized
when rewording a fast-forwarded commit.

Reported-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Tested-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-07-15 12:16:21 -07:00
Phillip Wood a7dbb3a462 sequencer: use an enum to represent result of picking a commit
Rather than using an integer where -1 is an error, 0 is success and 1
indicates there were conflicts, use an enum. This is clearer and lets
us add a separate return value for commits that are dropped because
they become empty in the next commit.

Note we continue to use "return error(...)" to return errors and
take advantage of C's lax typing of enums

Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-07-15 12:16:21 -07:00
Phillip Wood 034deee6c7 sequencer: simplify pick_one_commit()
Unless we're rebasing, all we do in pick_one_commit() is call
do_pick_commit() and return its result. Simplify the code by returning
early if we're not rebasing so that we don't have to repeatedly call
is_rebase_i() in the rest of the function. Note that there are a couple
of conditions that do not call is_rebase_i() but they check for either
an "edit" or a "fixup" command, both of which imply we're rebasing.

The only block that does not return early is the one guarded by
"!res". Move the return into that block to make it clear that after
recording the commit as rewritten, all we do is return from the
function.

As the conditional blocks are all mutually exclusive (either the
conditions are mutually exclusive, or an earlier conditional block
that would match a later one contains a "return" statement) chain
them together with "else if" to make that clear.

While we could remove "res" from the conditions below "if (!res)"
they are left alone because, when we start using an enum in the next
commit, it makes it clear that these clauses are handling cases where
there are conflicts.

Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-07-15 12:16:21 -07:00
Phillip Wood 871f9009d3 sequencer: remove unnecessary condition in pick_one_commit()
item->commit holds the commit to be picked and so it must be non-NULL
otherwise pick_one_commit() would not know which commit to pick.
It is also unconditionally dereferenced in do_pick_commit() which is
called at the top of this function. Therefore the check to see if it
is non-NULL is superfluous.

Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-07-15 12:16:21 -07:00
Phillip Wood dc0e2ac15d sequencer: simplify handling of fixup with conflicts
Commit e032abd5a0 (rebase: fix rewritten list for failed pick,
2023-09-06) introduced an early return when res == -1, so if
we enter this conditional block then res is positive. After the
last couple of commits the only possible positive value is 1. That
means we can simplify the code by removing the conditional call to
intend_to_amend() and have error_failed_squash() request that it is
called in error_with_patch() instead.

Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-07-15 12:16:21 -07:00
Phillip Wood 6bb740dffb sequencer: remove unnecessary "or" in pick_one_commit()
If error_with_patch(..., res, ...) succeeds then it returns "res", if
it fails then it returns -1. This means that or-ing the return value
with "res" is pointless as the result is the same as the return value.

Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-07-15 12:16:21 -07:00
Phillip Wood 18f5750beb sequencer: never reschedule on failed commit
If "git commit" fails to run then run_git_commit() returns -1 which
causes the current command to be rescheduled. This is incorrect as
we have successfully picked the commit and have written all the state
files we need to successfully commit when the user continues. Fix this
by converting -1 to 1 which matches what do_merge() does.

Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-07-15 12:16:21 -07:00
Phillip Wood 1da85922fd sequencer: be more careful with external merge
If an external merge strategy cannot merge (for example because it
would overwrite an untracked file) it exits with a non-zero exit
code other than 1. This should be treated differently from a merge
with conflicts, which is signaled by an exit code of 1, because, as
the merge failed, we need to reschedule the last pick. The caller
expects us to return -1 in this case. Also reschedule without trying
to merge if the commit message cannot be written as that prevents us
from successfully picking the commit.

Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-07-15 12:16:21 -07:00
Junio C Hamano 8af4256eb1 Merge branch 'pw/status-rebase-todo'
The display of the rebase todo list in "git status" has been
improved to correctly abbreviate object IDs for more commands and
avoid misinterpreting refs as object IDs.

* pw/status-rebase-todo:
  status: improve rebase todo list parsing
  sequencer: factor out parsing of todo commands
2026-07-06 15:50:23 -07:00
Patrick Steinhardt b2ebb7803b reset: introduce ability to skip updating HEAD
In a subsequent commit we'll introduce a new caller to
`reset_working_tree()` that really only wants to update the index and
working tree, without updating any references. Introduce a new flag that
makes the caller opt in to updating HEAD and adapt all callers to set
that flag.

Note that in a previous iteration we instead introduced a flag that made
callers opt out of updating any references. This was somewhat awkward
though because we already have the `UPDATE_ORIG_HEAD` flag, so the
result was somewhat inconsistent.

Suggested-by: Phillip Wood <phillip.wood123@gmail.com>
Signed-off-by: Patrick Steinhardt <ps@pks.im>
[jc: fixed-up a typo pointed out by Christian]
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-07-03 10:32:33 -07:00
Patrick Steinhardt 2535b951e0 reset: modernize flags passed to `reset_working_tree()`
The flags passed to `reset_working_tree()` are declared as defines. This
has fallen a bit out of practice nowadays, where we instead prefer to
use enums. Furthermore, the prefix of those flags does not match the
function name anymore after the rename in the preceding commit.

Adapt the code to follow modern best practices and adapt the flag names.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-07-01 09:56:53 -07:00
Patrick Steinhardt 9762e2faf7 reset: rename `reset_head()`
In a subsequent commit we're about to adapt `reset_head()` so that the
reference update to HEAD is optional, only. At this point the function
starts to feel misnamed, as it doesn't necessarily have anything to do
with the HEAD reference anymore. The gist of the function then is that
we reset the working tree to a specific new commit, updating both the
index and the checked-out files.

Rename it to `reset_working_tree()` to better reflect that.

Note that we don't adjust the flags yet. This will happen in a
subsequent commit.

Suggested-by: Phillip Wood <phillip.wood123@gmail.com>
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-07-01 09:56:52 -07:00
Phillip Wood 10c2678a2b sequencer: factor out parsing of todo commands
Move the code that parses todo commands into a separate function so
that it can be shared with "git status" in the next commit. As we
know the input is NUL terminated we do not pass a pointer to the end
of the line and instead test for a blank line by looking for NUL, CR
LF, or LF. We use starts_with() instead of starts_with_mem() for the
same reason. This results in slightly different behavior when there
a CR at the start of the line that is not followed by LF. Previously
such a line was treated as a comment rather than an invalid line.

Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-06-23 12:18:48 -07:00
Junio C Hamano 2fd113ae07 Merge branch 'rs/strbuf-add-oid-hex'
Formatting object name in full hexadecimal form has been optimized
by using a new strbuf_add_oid_hex() helper function.

* rs/strbuf-add-oid-hex:
  hex: add and use strbuf_add_oid_hex()
2026-06-09 10:04:50 +09:00
Junio C Hamano bbc230981d Merge branch 'ag/sequencer-remove-unused-struct-member'
Code clean-up.

* ag/sequencer-remove-unused-struct-member:
  sequencer: remove todo_add_branch_context.commit
2026-05-25 09:40:07 +09:00
Junio C Hamano 1cde0a68d8 Merge branch 'ag/rebase-update-refs-limit-to-branches'
"git rebase --update-refs", when used with an rebase.instructionFormat
with "%d" (describe) in it, tried to update local branch HEAD by
mistake, which has been corrected.

* ag/rebase-update-refs-limit-to-branches:
  rebase: ignore non-branch update-refs
2026-05-19 09:57:46 +09:00
René Scharfe 63621bcbba hex: add and use strbuf_add_oid_hex()
Add a function for adding the full hexadecimal hash value of an object
ID to a strbuf.  It's thread-safe and slightly more efficient than using
strbuf_addstr() with oid_to_hex() because it doesn't have to determine
the length of the string or copy it from the intermediate static buffer.

Add and apply a semantic patch to use it throughout the code base.

I get a tiny speedup for git log showing a single hash per commit:

Benchmark 1: ./git_main log --format=%H
  Time (mean ± σ):      91.2 ms ±   0.7 ms    [User: 51.9 ms, System: 38.6 ms]
  Range (min … max):    89.8 ms …  92.6 ms    31 runs

Benchmark 2: ./git log --format=%H
  Time (mean ± σ):      90.5 ms ±   0.7 ms    [User: 51.0 ms, System: 38.8 ms]
  Range (min … max):    89.2 ms …  92.3 ms    32 runs

Summary
  ./git log --format=%H ran
    1.01 ± 0.01 times faster than ./git_main log --format=%H

Signed-off-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-05-14 15:59:25 +09:00
Abhinav Gupta 61f711de4b sequencer: remove todo_add_branch_context.commit
The 'commit' field in 'struct todo_add_branch_context' is unused.
It's written to, but never read from.
add_decorations_to_list() gets the commit passed to it explicitly
as an argument.

Signed-off-by: Abhinav Gupta <mail@abhinavg.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-05-12 09:41:53 +09:00
Abhinav Gupta 106b6885c7 rebase: ignore non-branch update-refs
The following Git configuration breaks git rebase --update-refs:

    [rebase]
        instructionFormat = %s%d

The '%d' format requests all available decorations for a commit,
filling the global decoration table with all of them,
which --update-refs then uses to populate 'update-ref' instructions
in the rebase todo list.

Specifically, this results in the following instruction:

    update-ref HEAD

The todo parser then rejects the instruction:

    error: update-ref requires a fully qualified refname e.g. refs/heads/HEAD
    error: invalid line 3: update-ref HEAD

To fix, ignore decorations that are not local branches
when scanning through the table.

This matches the documented contract:
it moves branch refs under refs/heads/
and leaves display-only decorations (HEAD, tags, etc.) alone.

Verification:
A regression test that fails without this fix is included.

Signed-off-by: Abhinav Gupta <mail@abhinavg.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-05-11 09:00:44 +09:00
Harald Nordgren c07039ebc4 checkout -m: autostash when switching branches
When switching branches with "git checkout -m", the attempted merge
of local modifications may cause conflicts with the changes made on
the other branch, which the user may not want to (or may not be able
to) resolve right now.  Because there is no easy way to recover from
this situation, we discouraged users from using "checkout -m" unless
they are certain their changes are trivial and within their ability
to resolve conflicts.

Teach the -m flow to create a temporary stash before switching and
reapply it after.  On success, the stash is silently applied and
the list of locally modified paths is shown, same as a successful
"git checkout" without "-m".

If reapplying causes conflicts, the stash is kept and the user is
told they can resolve and run "git stash drop", or run "git reset
--hard" and later "git stash pop" to recover their changes.

Signed-off-by: Harald Nordgren <haraldnordgren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-04-29 21:46:03 +09:00
Harald Nordgren e1c8b2d4ec sequencer: teach autostash apply to take optional conflict marker labels
Add label_ours, label_theirs, label_base, and stash_msg parameters to
apply_autostash_ref() and the autostash apply machinery so callers can
pass custom conflict marker labels through to
"git stash apply --label-ours/--label-theirs/--label-base", as well as
a custom stash message for "git stash store -m".

Signed-off-by: Harald Nordgren <haraldnordgren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-04-29 21:46:03 +09:00
Harald Nordgren 93177db652 sequencer: allow create_autostash to run silently
Add a silent parameter to create_autostash_internal and introduce
create_autostash_ref_silent so that callers can create an autostash
without printing the "Created autostash" message.

Signed-off-by: Harald Nordgren <haraldnordgren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-04-29 21:46:02 +09:00
Junio C Hamano e0613d24f9 Merge branch 'sa/replay-revert'
"git replay" (experimental) learns, in addition to "pick" and
"replay", a new operating mode "revert".

* sa/replay-revert:
  replay: add --revert mode to reverse commit changes
  sequencer: extract revert message formatting into shared function
2026-04-03 13:01:09 -07:00
Siddharth Asthana 1e6434ebbd sequencer: extract revert message formatting into shared function
The logic for formatting revert commit messages (handling "Revert" and
"Reapply" cases, appending "This reverts commit <ref>.", and handling
merge-parent references) currently lives inline in do_pick_commit().
The upcoming replay --revert mode needs to reuse this logic.

Extract all of this into a new sequencer_format_revert_message()
function. The function takes a repository, the subject line, commit,
parent, a use_commit_reference flag, and the output strbuf. It handles
both regular reverts ("Revert "<subject>"") and revert-of-revert cases
("Reapply "<subject>""), and uses refer_to_commit() internally to
format the commit reference.

Update refer_to_commit() to take a struct repository parameter instead
of relying on the_repository, and a bool instead of reading from
replay_opts directly. This makes it usable from the new shared function
without pulling in sequencer-specific state.

Signed-off-by: Siddharth Asthana <siddharthasthana31@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-03-25 14:20:57 -07:00
Junio C Hamano accd0e107b Merge branch 'lc/rebase-trailer'
"git rebase" learns "--trailer" command to drive the
interpret-trailers machinery.

* lc/rebase-trailer:
  rebase: support --trailer
  commit, tag: parse --trailer with OPT_STRVEC
  trailer: append trailers without fork/exec
  trailer: libify a couple of functions
  interpret-trailers: refactor create_in_place_tempfile()
  interpret-trailers: factor trailer rewriting
2026-03-19 09:54:56 -07:00
Junio C Hamano 5c56c725f1 Merge branch 'ar/run-command-hook-take-2'
Use the hook API to replace ad-hoc invocation of hook scripts via
the run_command() API.

* ar/run-command-hook-take-2:
  builtin/receive-pack: avoid spinning no-op sideband async threads
  receive-pack: convert receive hooks to hook API
  receive-pack: convert update hooks to new API
  run-command: poll child input in addition to output
  hook: add jobs option
  reference-transaction: use hook API instead of run-command
  transport: convert pre-push to hook API
  hook: allow separate std[out|err] streams
  hook: convert 'post-rewrite' hook in sequencer.c to hook API
  hook: provide stdin via callback
  run-command: add stdin callback for parallelization
  run-command: add helper for pp child states
  t1800: add hook output stream tests
2026-03-09 14:36:55 -07:00
Li Chen e4f9d6b0ab rebase: support --trailer
Add a new --trailer=<trailer> option to git rebase to append trailer
lines to each rewritten commit message (merge backend only).

Because the apply backend does not provide a commit-message filter,
reject --trailer when --apply is in effect and require the merge backend
instead.

This option implies --force-rebase so that fast-forwarded commits are
also rewritten. Validate trailer arguments early to avoid starting an
interactive rebase with invalid input.

Add integration tests covering error paths and trailer insertion across
non-interactive and interactive rebases.

Signed-off-by: Li Chen <me@linux.beauty>
Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-03-06 13:02:20 -08:00
Junio C Hamano 5288202433 Merge branch 'ps/commit-list-functions-renamed'
Rename three functions around the commit_list data structure.

* ps/commit-list-functions-renamed:
  commit: rename `free_commit_list()` to conform to coding guidelines
  commit: rename `reverse_commit_list()` to conform to coding guidelines
  commit: rename `copy_commit_list()` to conform to coding guidelines
2026-02-13 13:39:25 -08:00
Emily Shaffer e8ee80cfb6 hook: convert 'post-rewrite' hook in sequencer.c to hook API
Replace the custom run-command calls used by post-rewrite with
the newer and simpler hook_run_opt(), which does not need to
create a custom 'struct child_process' or call find_hook().

Another benefit of using the hook API is that hook_run_opt()
handles the SIGPIPE toggle logic.

Signed-off-by: Emily Shaffer <emilyshaffer@google.com>
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Adrian Ratiu <adrian.ratiu@collabora.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-01-28 15:47:03 -08:00
Junio C Hamano 214cbb7b1d Merge branch 'rs/tree-wo-the-repository'
Remove implicit reliance on the_repository global in the APIs
around tree objects and make it explicit which repository to work
in.

* rs/tree-wo-the-repository:
  cocci: remove obsolete the_repository rules
  cocci: convert parse_tree functions to repo_ variants
  tree: stop using the_repository
  tree: use repo_parse_tree()
  path-walk: use repo_parse_tree_gently()
  pack-bitmap-write: use repo_parse_tree()
  delta-islands: use repo_parse_tree()
  bloom: use repo_parse_tree()
  add-interactive: use repo_parse_tree_indirect()
  tree: add repo_parse_tree*()
  environment: move access to core.maxTreeDepth into repo settings
2026-01-21 16:16:28 -08:00
Junio C Hamano a3d1f391d3 Revert "Merge branch 'ar/run-command-hook'"
This reverts commit f406b89552,
reversing changes made to 1627809eef.

It seems to have caused a few regressions, two of the three known
ones we have proposed solutions for.  Let's give ourselves a bit
more room to maneuver during the pre-release freeze period and
restart once the 2.53 ships.
2026-01-15 13:02:38 -08:00
Patrick Steinhardt 9f18d089c5 commit: rename `free_commit_list()` to conform to coding guidelines
Our coding guidelines say that:

  Functions that operate on `struct S` are named `S_<verb>()` and should
  generally receive a pointer to `struct S` as first parameter.

While most of the functions related to `struct commit_list` already
follow that naming schema, `free_commit_list()` doesn't.

Rename the function to address this and adjust all of its callers. Add a
compatibility wrapper for the old function name to ease the transition
and avoid any semantic conflicts with in-flight patch series. This
wrapper will be removed once Git 2.53 has been released.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-01-15 05:32:31 -08:00
Patrick Steinhardt a468f3cefa commit: rename `reverse_commit_list()` to conform to coding guidelines
Our coding guidelines say that:

  Functions that operate on `struct S` are named `S_<verb>()` and should
  generally receive a pointer to `struct S` as first parameter.

While most of the functions related to `struct commit_list` already
follow that naming schema, `reverse_commit_list()` doesn't.

Rename the function to address this and adjust all of its callers. Add a
compatibility wrapper for the old function name to ease the transition
and avoid any semantic conflicts with in-flight patch series. This
wrapper will be removed once Git 2.53 has been released.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-01-15 05:32:31 -08:00
Patrick Steinhardt ff9fb2cfe6 commit: rename `copy_commit_list()` to conform to coding guidelines
Our coding guidelines say that:

  Functions that operate on `struct S` are named `S_<verb>()` and should
  generally receive a pointer to `struct S` as first parameter.

While most of the functions related to `struct commit_list` already
follow that naming schema, `copy_commit_list()` doesn't.

Rename the function to address this and adjust all of its callers. Add a
compatibility wrapper for the old function name to ease the transition
and avoid any semantic conflicts with in-flight patch series. This
wrapper will be removed once Git 2.53 has been released.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-01-15 05:32:31 -08:00
René Scharfe ec7a16b145 cocci: convert parse_tree functions to repo_ variants
Add and apply a semantic patch to convert calls to parse_tree() and
friends to the corresponding variant that takes a repository argument,
to allow the functions that implicitly use the_repository to be retired
once all potential in-flight topics are settled and converted as well.

The changes in .c files were generated by Coccinelle, but I fixed a
whitespace bug it would have introduced to builtin/commit.c.

Signed-off-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-01-09 18:36:18 -08:00
Emily Shaffer 05eccff8c7 hook: convert 'post-rewrite' hook in sequencer.c to hook API
Replace the custom run-command calls used by post-rewrite with
the newer and simpler hook_run_opt(), which does not need to
create a custom 'struct child_process' or call find_hook().

Another benefit of using the hook API is that hook_run_opt()
handles the SIGPIPE toggle logic.

Signed-off-by: Emily Shaffer <emilyshaffer@google.com>
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Adrian Ratiu <adrian.ratiu@collabora.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2025-12-28 14:02:06 +09:00