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2022-01-05i18n: turn even more messages into "cannot be used together" onesLibravatar Jean-Noël Avila1-2/+2
Even if some of these messages are not subject to gettext i18n, this helps bring a single style of message for a given error type. Signed-off-by: Jean-Noël Avila <jn.avila@free.fr> Reviewed-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-01-05i18n: turn "options are incompatible" into "cannot be used together"Libravatar Jean-Noël Avila1-3/+3
Signed-off-by: Jean-Noël Avila <jn.avila@free.fr> Reviewed-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-10-18Merge branch 'js/retire-preserve-merges'Libravatar Junio C Hamano1-324/+14
The "--preserve-merges" option of "git rebase" has been removed. * js/retire-preserve-merges: sequencer: restrict scope of a formerly public function rebase: remove a no-longer-used function rebase: stop mentioning the -p option in comments rebase: remove obsolete code comment rebase: drop the internal `rebase--interactive` command git-svn: drop support for `--preserve-merges` rebase: drop support for `--preserve-merges` pull: remove support for `--rebase=preserve` tests: stop testing `git rebase --preserve-merges` remote: warn about unhandled branch.<name>.rebase values t5520: do not use `pull.rebase=preserve`
2021-10-06Merge branch 'pw/rebase-of-a-tag-fix'Libravatar Junio C Hamano1-28/+21
"git rebase <upstream> <tag>" failed when aborted in the middle, as it mistakenly tried to write the tag object instead of peeling it to HEAD. * pw/rebase-of-a-tag-fix: rebase: dereference tags rebase: use lookup_commit_reference_by_name() rebase: use our standard error return value t3407: rework rebase --quit tests t3407: strengthen rebase --abort tests t3407: use test_path_is_missing t3407: rename a variable t3407: use test_cmp_rev t3407: use test_commit t3407: run tests in $TEST_DIRECTORY
2021-09-22rebase: dereference tagsLibravatar Phillip Wood1-6/+8
A rebase started with 'git rebase <A> <B>' is conceptually to first checkout <B> and run 'git rebase <A>' starting from that state. 'git rebase --abort' in the middle of such a rebase should take us back to the state we checked out <B>. This used to work, even when <B> is a tag that points at a commit, until Git 2.20.0 when the command was reimplemented in C. The command now complains that the tag object itself cannot be checked out, which may be technically correct but is not what the user asked to do. Fix this old regression by using lookup_commit_reference_by_name() when parsing <B>. The scripted version did not need to peel the tag because the commands it passed the tag to (e.g 'git reset') peeled the tag themselves. Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-22rebase: use lookup_commit_reference_by_name()Libravatar Phillip Wood1-13/+4
peel_committish() appears to have been copied from the scripted rebase but it duplicates the functionality of lookup_commit_reference_by_name() so lets use that instead. Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-22rebase: use our standard error return valueLibravatar Phillip Wood1-9/+9
Git uses −1 to signal an error. The builtin rebase converts these to +1 all over the place using !! (presumably because the in the scripted version an error was signalled by +1). This is confusing and clutters the code, we only need to convert the value when the function returns. Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-20Merge branch 'js/run-command-close-packs'Libravatar Junio C Hamano1-1/+0
The run-command API has been updated so that the callers can easily ask the file descriptors open for packfiles to be closed immediately before spawning commands that may trigger auto-gc. * js/run-command-close-packs: Close object store closer to spawning child processes run_auto_maintenance(): implicitly close the object store run-command: offer to close the object store before running run-command: prettify the `RUN_COMMAND_*` flags pull: release packs before fetching commit-graph: when closing the graph, also release the slab
2021-09-20Merge branch 'ds/mergies-with-sparse-index'Libravatar Junio C Hamano1-0/+6
Various mergy operations have been prepared to work efficiently with the sparse index. * ds/mergies-with-sparse-index: sparse-index: integrate with cherry-pick and rebase sequencer: ensure full index if not ORT strategy t1092: add cherry-pick, rebase tests merge-ort: expand only for out-of-cone conflicts merge: make sparse-aware with ORT diff: ignore sparse paths in diffstat
2021-09-10Merge branch 'js/advise-when-skipping-cherry-picked'Libravatar Junio C Hamano1-0/+1
"git rebase" by default skips changes that are equivalent to commits that are already in the history the branch is rebased onto; give messages when this happens to let the users be aware of skipped commits, and also teach them how to tell "rebase" to keep duplicated changes. * js/advise-when-skipping-cherry-picked: sequencer: advise if skipping cherry-picked commit
2021-09-09sparse-index: integrate with cherry-pick and rebaseLibravatar Derrick Stolee1-0/+6
The hard work was already done with 'git merge' and the ORT strategy. Just add extra tests to see that we get the expected results in the non-conflict cases. Signed-off-by: Derrick Stolee <dstolee@microsoft.com> Reviewed-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-09run_auto_maintenance(): implicitly close the object storeLibravatar Johannes Schindelin1-1/+0
Before spawning the auto maintenance, we need to make sure that we release all open file handles to all the `.pack` files (and MIDX files and commit-graph files and...) so that the maintenance process has the freedom to delete those files. So far, we did this manually every time before calling `run_auto_maintenance()`. With the new `close_object_store` flag, we can do that implicitly in that function, which is more robust because future callers won't be able to forget to close the object store. Note: this changes behavior slightly, as we previously _always_ closed the object store, but now we only close the object store when actually running the auto maintenance. In practice, this should not matter (if anything, it might speed up operations where auto maintenance is disabled). Suggested-by: Junio C Hamano <gitster@pobox.com> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-08Merge branch 'ab/rebase-fatal-fatal-fix'Libravatar Junio C Hamano1-1/+1
Error message fix. * ab/rebase-fatal-fatal-fix: rebase: emit one "fatal" in "fatal: fatal: <error>"
2021-09-07rebase: stop mentioning the -p option in commentsLibravatar Johannes Schindelin1-1/+1
We no longer support `--preserve-merges`, therefore it does not make sense to keep mentioning that option, even in code comments. Helped-by: Phillip Wood <phillip.wood123@gmail.com> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Reviewed-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-07rebase: remove obsolete code commentLibravatar Johannes Schindelin1-1/+1
Now that we no longer have a `--preserve-merges` backend, this comment needs to be adjusted. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Reviewed-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-07rebase: drop the internal `rebase--interactive` commandLibravatar Johannes Schindelin1-192/+1
It was only used by the `--preserve-merges` backend, which we just removed. Helped-by: Alban Gruin <alban.gruin@gmail.com> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Reviewed-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-07rebase: drop support for `--preserve-merges`Libravatar Johannes Schindelin1-127/+11
This option was deprecated in favor of `--rebase-merges` some time ago, and now we retire it. To assist users to transition away, we do not _actually_ remove the option, but now we no longer implement the functionality. Instead, we offer a helpful error message suggesting which option to use. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Reviewed-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-08-30sequencer: advise if skipping cherry-picked commitLibravatar Josh Steadmon1-0/+1
Silently skipping commits when rebasing with --no-reapply-cherry-picks (currently the default behavior) can cause user confusion. Issue warnings when this happens, as well as advice on how to preserve the skipped commits. These warnings and advice are displayed only when using the (default) "merge" rebase backend. Update the git-rebase docs to mention the warnings and advice. Signed-off-by: Josh Steadmon <steadmon@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-08-30Merge branch 'en/ort-becomes-the-default'Libravatar Junio C Hamano1-1/+1
Use `ort` instead of `recursive` as the default merge strategy. * en/ort-becomes-the-default: Update docs for change of default merge backend Change default merge backend from recursive to ort
2021-08-24rebase: emit one "fatal" in "fatal: fatal: <error>"Libravatar Ævar Arnfjörð Bjarmason1-1/+1
The die() routine adds a "fatal: " prefix, there is no reason to add another one. Fixes code added in e65123a71d0 (builtin rebase: support `git rebase <upstream> <switch-to>`, 2018-09-04). Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-08-05Change default merge backend from recursive to ortLibravatar Elijah Newren1-1/+1
There are a few reasons to switch the default: * Correctness * Extensibility * Performance I'll provide some summaries about each. === Correctness === The original impetus for a new merge backend was to fix issues that were difficult to fix within recursive's design. The success with this goal is perhaps most easily demonstrated by running the following: $ git grep -2 KNOWN_FAILURE t/ | grep -A 4 GIT_TEST_MERGE_ALGORITHM $ git grep test_expect_merge_algorithm.failure.success t/ $ git grep test_expect_merge_algorithm.success.failure t/ In order, these greps show: * Seven sets of submodule tests (10 total tests) that fail with recursive but succeed with ort * 22 other tests that fail with recursive, but succeed with ort * 0 tests that pass with recursive, but fail with ort === Extensibility === Being able to perform merges without touching the working tree or index makes it possible to create new features that were difficult with the old backend: * Merging, cherry-picking, rebasing, reverting in bare repositories... or just on branches that aren't checked out. * `git diff AUTO_MERGE` -- ability to see what changes the user has made to resolve conflicts so far (see commit 5291828df8 ("merge-ort: write $GIT_DIR/AUTO_MERGE whenever we hit a conflict", 2021-03-20) * A --remerge-diff option for log/show, used to show diffs for merges that display the difference between what an automatic merge would have created and what was recorded in the merge. (This option will often result in an empty diff because many merges are clean, but for the non-clean ones it will show how conflicts were fixed including the removal of conflict markers, and also show additional changes made outside of conflict regions to e.g. fix semantic conflicts.) * A --remerge-diff-only option for log/show, similar to --remerge-diff but also showing how cherry-picks or reverts differed from what an automatic cherry-pick or revert would provide. The last three have been implemented already (though only one has been submitted upstream so far; the others were waiting for performance work to complete), and I still plan to implement the first one. === Performance === I'll quote from the summary of my final optimization for merge-ort (while fixing the testcase name from 'no-renames' to 'few-renames'): Timings Infinite merge- merge- Parallelism recursive recursive of rename merge-ort v2.30.0 current detection current ---------- --------- ----------- --------- few-renames: 18.912 s 18.030 s 11.699 s 198.3 ms mega-renames: 5964.031 s 361.281 s 203.886 s 661.8 ms just-one-mega: 149.583 s 11.009 s 7.553 s 264.6 ms Speedup factors Infinite merge- merge- Parallelism recursive recursive of rename v2.30.0 current detection merge-ort ---------- --------- ----------- --------- few-renames: 1 1.05 1.6 95 mega-renames: 1 16.5 29 9012 just-one-mega: 1 13.6 20 565 And, for partial clone users: Factor reduction in number of objects needed Infinite merge- merge- Parallelism recursive recursive of rename v2.30.0 current detection merge-ort ---------- --------- ----------- --------- mega-renames: 1 1 1 181.3 Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-07-26builtin/rebase: fix options.strategy memory lifecycleLibravatar Andrzej Hunt1-1/+2
- cmd_rebase populates rebase_options.strategy with newly allocated strings, hence we need to free those strings at the end of cmd_rebase to avoid a leak. - In some cases: get_replay_opts() is called, which prepares replay_opts using data from rebase_options. We used to simply copy the pointer from rebase_options.strategy, however that would now result in a double-free because sequencer_remove_state() is eventually used to free replay_opts.strategy. To avoid this we xstrdup() strategy when adding it to replay_opts. The original leak happens because we always populate rebase_options.strategy, but we don't always enter the path that calls get_replay_opts() and later sequencer_remove_state() - in other words we'd always allocate a new string into rebase_options.strategy but only sometimes did we free it. We now make sure that rebase_options and replay_opts both own their own copies of strategy, and each copy is free'd independently. This was first seen when running t0021 with LSAN, but t2012 helped catch the fact that we can't just free(options.strategy) at the end of cmd_rebase (as that can cause a double-free). LSAN output from t0021: LSAN output from t0021: Direct leak of 4 byte(s) in 1 object(s) allocated from: #0 0x486804 in strdup ../projects/compiler-rt/lib/asan/asan_interceptors.cpp:452:3 #1 0xa71eb8 in xstrdup wrapper.c:29:14 #2 0x61b1cc in cmd_rebase builtin/rebase.c:1779:22 #3 0x4ce83e in run_builtin git.c:475:11 #4 0x4ccafe in handle_builtin git.c:729:3 #5 0x4cb01c in run_argv git.c:818:4 #6 0x4cb01c in cmd_main git.c:949:19 #7 0x6b3fad in main common-main.c:52:11 #8 0x7f267b512349 in __libc_start_main (/lib64/libc.so.6+0x24349) SUMMARY: AddressSanitizer: 4 byte(s) leaked in 1 allocation(s). Signed-off-by: Andrzej Hunt <andrzej@ahunt.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-05-10Merge branch 'bc/hash-transition-interop-part-1'Libravatar Junio C Hamano1-2/+2
SHA-256 transition. * bc/hash-transition-interop-part-1: hex: print objects using the hash algorithm member hex: default to the_hash_algo on zero algorithm value builtin/pack-objects: avoid using struct object_id for pack hash commit-graph: don't store file hashes as struct object_id builtin/show-index: set the algorithm for object IDs hash: provide per-algorithm null OIDs hash: set, copy, and use algo field in struct object_id builtin/pack-redundant: avoid casting buffers to struct object_id Use the final_oid_fn to finalize hashing of object IDs hash: add a function to finalize object IDs http-push: set algorithm when reading object ID Always use oidread to read into struct object_id hash: add an algo member to struct object_id
2021-05-07Merge branch 'ah/plugleaks'Libravatar Junio C Hamano1-0/+1
Plug various leans reported by LSAN. * ah/plugleaks: builtin/rm: avoid leaking pathspec and seen builtin/rebase: release git_format_patch_opt too builtin/for-each-ref: free filter and UNLEAK sorting. mailinfo: also free strbuf lists when clearing mailinfo builtin/checkout: clear pending objects after diffing builtin/check-ignore: clear_pathspec before returning builtin/bugreport: don't leak prefixed filename branch: FREE_AND_NULL instead of NULL'ing real_ref bloom: clear each bloom_key after use ls-files: free max_prefix when done wt-status: fix multiple small leaks revision: free remainder of old commit list in limit_list
2021-04-28builtin/rebase: release git_format_patch_opt tooLibravatar Andrzej Hunt1-0/+1
options.git_format_patch_opt can be populated during cmd_rebase's setup, and will therefore leak on return. Although we could just UNLEAK all of options, we choose to strbuf_release() the individual member, which matches the existing pattern (where we're freeing invidual members of options). Leak found when running t0021: Direct leak of 24 byte(s) in 1 object(s) allocated from: #0 0x49ab79 in realloc ../projects/compiler-rt/lib/asan/asan_malloc_linux.cpp:164:3 #1 0x9ac296 in xrealloc wrapper.c:126:8 #2 0x93b13d in strbuf_grow strbuf.c:98:2 #3 0x93bd3a in strbuf_add strbuf.c:295:2 #4 0x60ae92 in strbuf_addstr strbuf.h:304:2 #5 0x605f17 in cmd_rebase builtin/rebase.c:1759:3 #6 0x4cd91d in run_builtin git.c:467:11 #7 0x4cb5f3 in handle_builtin git.c:719:3 #8 0x4ccf47 in run_argv git.c:808:4 #9 0x4caf49 in cmd_main git.c:939:19 #10 0x69dbfe in main common-main.c:52:11 #11 0x7f66dae91349 in __libc_start_main (/lib64/libc.so.6+0x24349) SUMMARY: AddressSanitizer: 24 byte(s) leaked in 1 allocation(s). Signed-off-by: Andrzej Hunt <ajrhunt@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-04-27hash: provide per-algorithm null OIDsLibravatar brian m. carlson1-2/+2
Up until recently, object IDs did not have an algorithm member, only a hash. Consequently, it was possible to share one null (all-zeros) object ID among all hash algorithms. Now that we're going to be handling objects from multiple hash algorithms, it's important to make sure that all object IDs have a correct algorithm field. Introduce a per-algorithm null OID, and add it to struct hash_algo. Introduce a wrapper function as well, and use it everywhere we used to use the null_oid constant. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-04-16Merge branch 'en/ort-readiness'Libravatar Junio C Hamano1-0/+1
Plug the ort merge backend throughout the rest of the system, and start testing it as a replacement for the recursive backend. * en/ort-readiness: Add testing with merge-ort merge strategy t6423: mark remaining expected failure under merge-ort as such Revert "merge-ort: ignore the directory rename split conflict for now" merge-recursive: add a bunch of FIXME comments documenting known bugs merge-ort: write $GIT_DIR/AUTO_MERGE whenever we hit a conflict t: mark several submodule merging tests as fixed under merge-ort merge-ort: implement CE_SKIP_WORKTREE handling with conflicted entries t6428: new test for SKIP_WORKTREE handling and conflicts merge-ort: support subtree shifting merge-ort: let renormalization change modify/delete into clean delete merge-ort: have ll_merge() use a special attr_index for renormalization merge-ort: add a special minimal index just for renormalization merge-ort: use STABLE_QSORT instead of QSORT where required
2021-03-23rebase: remove transitory rebase.useBuiltin setting & envLibravatar Ævar Arnfjörð Bjarmason1-11/+0
Remove the rebase.useBuiltin setting and the now-obsolete GIT_TEST_REBASE_USE_BUILTIN test flag. This was left in place after my d03ebd411c6 (rebase: remove the rebase.useBuiltin setting, 2019-03-18) to help anyone who'd used the experimental flag and wanted to know that it was the default, or that they should transition their test environment to use the builtin rebase unconditionally. It's been more than long enough for those users to get a headsup about this. So remove all the scaffolding that was left inplace after d03ebd411c6. I'm also removing the documentation entry, if anyone still has this left in their configuration they can do some source archaeology to figure out what it used to do, which makes more sense than exposing every git user reading the documentation to this legacy configuration switch. Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Acked-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-03-20merge-ort: write $GIT_DIR/AUTO_MERGE whenever we hit a conflictLibravatar Elijah Newren1-0/+1
There are a variety of questions users might ask while resolving conflicts: * What changes have been made since the previous (first) parent? * What changes are staged? * What is still unstaged? (or what is still conflicted?) * What changes did I make to resolve conflicts so far? The first three of these have simple answers: * git diff HEAD * git diff --cached * git diff There was no way to answer the final question previously. Adding one is trivial in merge-ort, since it works by creating a tree representing what should be written to the working copy complete with conflict markers. Simply write that tree to .git/AUTO_MERGE, allowing users to answer the fourth question with * git diff AUTO_MERGE I avoided using a name like "MERGE_AUTO", because that would be merge-specific (much like MERGE_HEAD, REBASE_HEAD, REVERT_HEAD, CHERRY_PICK_HEAD) and I wanted a name that didn't change depending on which type of operation the merge was part of. Ensure that paths which clean out other temporary operation-specific files (e.g. CHERRY_PICK_HEAD, MERGE_MSG, rebase-merge/ state directory) also clean out this AUTO_MERGE file. Signed-off-by: Elijah Newren <newren@gmail.com> Reviewed-by: Derrick Stolee <dstolee@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-02-24rebase: add a config option for --no-fork-pointLibravatar Alex Henrie1-7/+13
Some users (myself included) would prefer to have this feature off by default because it can silently drop commits. Signed-off-by: Alex Henrie <alexhenrie24@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-01-15Merge branch 'rs/rebase-commit-validation'Libravatar Junio C Hamano1-1/+3
Diagnose command line error of "git rebase" early. * rs/rebase-commit-validation: rebase: verify commit parameter
2021-01-04rebase: verify commit parameterLibravatar René Scharfe1-1/+3
If the user specifies a base commit to switch to, check if it actually references a commit right away to avoid getting confused later on when it turns out to be an invalid object. Reported-by: LeSeulArtichaut <leseulartichaut@gmail.com> Signed-off-by: René Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-11-18Merge branch 'en/merge-ort-api-null-impl'Libravatar Junio C Hamano1-1/+12
Preparation for a new merge strategy. * en/merge-ort-api-null-impl: merge,rebase,revert: select ort or recursive by config or environment fast-rebase: demonstrate merge-ort's API via new test-tool command merge-ort-wrappers: new convience wrappers to mimic the old merge API merge-ort: barebones API of new merge strategy with empty implementation
2020-11-18Merge branch 'pw/rebase-i-orig-head'Libravatar Junio C Hamano1-10/+10
"git rebase -i" did not store ORIG_HEAD correctly. * pw/rebase-i-orig-head: rebase -i: simplify get_revision_ranges() rebase -i: use struct object_id when writing state rebase -i: use struct object_id rather than looking up commit rebase -i: stop overwriting ORIG_HEAD buffer
2020-11-04rebase -i: simplify get_revision_ranges()Libravatar Phillip Wood1-6/+4
Now that all the external users of head_hash have been converted to use a opts->orig_head instead we can stop returning head_hash from get_revision_ranges(). Because we want to pass the full object names back to the caller in `revisions` the find_unique_abbrev_r() call that was used to initialize `head_hash` is replaced with oid_to_hex(). Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-11-04rebase -i: use struct object_id when writing stateLibravatar Phillip Wood1-2/+3
Rather than passing a string around pass the struct object_id that the string was created from call oid_hex() when we write the file. Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-11-04rebase -i: use struct object_id rather than looking up commitLibravatar Phillip Wood1-2/+3
We already have a struct object_id containing the oid that we want to set ORIG_HEAD to so use that rather than converting it to a string and then calling get_oid() on that string. Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-11-04rebase -i: stop overwriting ORIG_HEAD bufferLibravatar Phillip Wood1-5/+5
After rebasing, ORIG_HEAD is supposed to point to the old HEAD of the rebased branch. The code used find_unique_abbrev() to obtain the object name of the old HEAD and wrote to both .git/rebase-merge/orig-head (used by `rebase --abort` to go back to the previous state) and to ORIG_HEAD. The buffer find_unique_abbrev() gives back is volatile, unfortunately, and was overwritten after the former file is written but before ORIG_FILE is written, leaving an incorrect object name in it. Avoid relying on the volatile buffer of find_unique_abbrev(), and instead supply our own buffer to keep the object name. I think that all of the users of head_hash should actually be using opts->orig_head instead as passing a string rather than a struct object_id around is a hang over from the scripted implementation. This patch just fixes the immediate bug and adds a regression test based on Caspar's reproduction example[1]. The users will be converted to use struct object_id and head_hash removed in the next few commits. [1] https://lore.kernel.org/git/CAFzd1+7PDg2PZgKw7U0kdepdYuoML9wSN4kofmB_-8NHrbbrHg@mail.gmail.com Reported-by: Caspar Duregger <herr.kaste@gmail.com> Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-11-02merge,rebase,revert: select ort or recursive by config or environmentLibravatar Elijah Newren1-1/+12
Allow the testsuite to run where it treats requests for "recursive" or the default merge algorithm via consulting the environment variable GIT_TEST_MERGE_ALGORITHM which is expected to either be "recursive" (the old traditional algorithm) or "ort" (the new algorithm). Also, allow folks to pick the new algorithm via config setting. It turns out builtin/merge.c already had a way to allow users to specify a different default merge algorithm: pull.twohead. Rather odd configuration name (especially to be in the 'pull' namespace rather than 'merge') but it's there. Add that same configuration to rebase, cherry-pick, and revert. This required updating the various callsites that called merge_trees() or merge_recursive() to conditionally call the new API, so this serves as another demonstration of what the new API looks and feels like. There are almost certainly some callsites that have not yet been modified to work with the new merge algorithm, but this represents the ones that I have been testing with thus far. Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-10-20Documentation: stylistically normalize references to Signed-off-by:Libravatar Bradley M. Kuhn1-1/+1
Ted reported an old typo in the git-commit.txt and merge-options.txt. Namely, the phrase "Signed-off-by line" was used without either a definite nor indefinite article. Upon examination, it seems that the documentation (including items in Documentation/, but also option help strings) have been quite inconsistent on usage when referring to `Signed-off-by`. First, very few places used a definite or indefinite article with the phrase "Signed-off-by line", but that was the initial typo that led to this investigation. So, normalize using either an indefinite or definite article consistently. The original phrasing, in Commit 3f971fc425b (Documentation updates, 2005-08-14), is "Add Signed-off-by line". Commit 6f855371a53 (Add --signoff, --check, and long option-names. 2005-12-09) switched to using "Add `Signed-off-by:` line", but didn't normalize the former commit to match. Later commits seem to have cut and pasted from one or the other, which is likely how the usage became so inconsistent. Junio stated on the git mailing list in <xmqqy2k1dfoh.fsf@gitster.c.googlers.com> a preference to leave off the colon. Thus, prefer `Signed-off-by` (with backticks) for the documentation files and Signed-off-by (without backticks) for option help strings. Additionally, Junio argued that "trailer" is now the standard term to refer to `Signed-off-by`, saying that "becomes plenty clear that we are not talking about any random line in the log message". As such, prefer "trailer" over "line" anywhere the former word fits. However, leave alone those few places in documentation that use Signed-off-by to refer to the process (rather than the specific trailer), or in places where mail headers are generally discussed in comparison with Signed-off-by. Reported-by: "Theodore Y. Ts'o" <tytso@mit.edu> Signed-off-by: Bradley M. Kuhn <bkuhn@sfconservancy.org> Acked-by: Taylor Blau <me@ttaylorr.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-09-25Merge branch 'ds/maintenance-part-1'Libravatar Junio C Hamano1-2/+2
A "git gc"'s big brother has been introduced to take care of more repository maintenance tasks, not limited to the object database cleaning. * ds/maintenance-part-1: maintenance: add trace2 regions for task execution maintenance: add auto condition for commit-graph task maintenance: use pointers to check --auto maintenance: create maintenance.<task>.enabled config maintenance: take a lock on the objects directory maintenance: add --task option maintenance: add commit-graph task maintenance: initialize task array maintenance: replace run_auto_gc() maintenance: add --quiet option maintenance: create basic maintenance runner
2020-09-17maintenance: replace run_auto_gc()Libravatar Derrick Stolee1-2/+2
The run_auto_gc() method is used in several places to trigger a check for repo maintenance after some Git commands, such as 'git commit' or 'git fetch'. To allow for extra customization of this maintenance activity, replace the 'git gc --auto [--quiet]' call with one to 'git maintenance run --auto [--quiet]'. As we extend the maintenance builtin with other steps, users will be able to select different maintenance activities. Rename run_auto_gc() to run_auto_maintenance() to be clearer what is happening on this call, and to expose all callers in the current diff. Rewrite the method to use a struct child_process to simplify the calls slightly. Since 'git fetch' already allows disabling the 'git gc --auto' subprocess, add an equivalent option with a different name to be more descriptive of the new behavior: '--[no-]maintenance'. Update the documentation to include these options at the same time. Signed-off-by: Derrick Stolee <dstolee@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-09-03Merge branch 'pw/rebase-i-more-options'Libravatar Junio C Hamano1-11/+36
"git rebase -i" learns a bit more options. * pw/rebase-i-more-options: t3436: do not run git-merge-recursive in dashed form rebase: add --reset-author-date rebase -i: support --ignore-date rebase -i: support --committer-date-is-author-date am: stop exporting GIT_COMMITTER_DATE rebase -i: add --ignore-whitespace flag
2020-08-19rebase: add --reset-author-dateLibravatar Rohit Ashiwal1-1/+3
The previous commit introduced --ignore-date flag to rebase -i, but the name is rather vague as it does not say whether the author date or the committer date is ignored. Add an alias to convey the precise purpose. Helped-by: Junio C Hamano <gitster@pobox.com> Signed-off-by: Rohit Ashiwal <rohit.ashiwal265@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-19rebase -i: support --ignore-dateLibravatar Phillip Wood1-5/+8
Rebase is implemented with two different backends - 'apply' and 'merge' each of which support a different set of options. In particular the apply backend supports a number of options implemented by 'git am' that are not implemented in the merge backend. This means that the available options are different depending on which backend is used which is confusing. This patch adds support for the --ignore-date option to the merge backend. This option uses the current time as the author date rather than reusing the original author date when rewriting commits. We take care to handle the combination of --ignore-date and --committer-date-is-author-date in the same way as the apply backend. Original-patch-by: Rohit Ashiwal <rohit.ashiwal265@gmail.com> Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-17rebase -i: support --committer-date-is-author-dateLibravatar Phillip Wood1-5/+12
Rebase is implemented with two different backends - 'apply' and 'merge' each of which support a different set of options. In particular the apply backend supports a number of options implemented by 'git am' that are not implemented in the merge backend. This means that the available options are different depending on which backend is used which is confusing. This patch adds support for the --committer-date-is-author-date option to the merge backend. This option uses the author date of the commit that is being rewritten as the committer date when the new commit is created. Original-patch-by: Rohit Ashiwal <rohit.ashiwal265@gmail.com> Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-07-30strvec: rename struct fieldsLibravatar Jeff King1-8/+8
The "argc" and "argv" names made sense when the struct was argv_array, but now they're just confusing. Let's rename them to "nr" (which we use for counts elsewhere) and "v" (which is rather terse, but reads well when combined with typical variable names like "args.v"). Note that we have to update all of the callers immediately. Playing tricks with the preprocessor is hard here, because we wouldn't want to rewrite unrelated tokens. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-07-28strvec: fix indentation in renamed callsLibravatar Jeff King1-7/+7
Code which split an argv_array call across multiple lines, like: argv_array_pushl(&args, "one argument", "another argument", "and more", NULL); was recently mechanically renamed to use strvec, which results in mis-matched indentation like: strvec_pushl(&args, "one argument", "another argument", "and more", NULL); Let's fix these up to align the arguments with the opening paren. I did this manually by sifting through the results of: git jump grep 'strvec_.*,$' and liberally applying my editor's auto-format. Most of the changes are of the form shown above, though I also normalized a few that had originally used a single-tab indentation (rather than our usual style of aligning with the open paren). I also rewrapped a couple of obvious cases (e.g., where previously too-long lines became short enough to fit on one), but I wasn't aggressive about it. In cases broken to three or more lines, the grouping of arguments is sometimes meaningful, and it wasn't worth my time or reviewer time to ponder each case individually. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-07-28strvec: convert builtin/ callers away from argv_array nameLibravatar Jeff King1-30/+30
We eventually want to drop the argv_array name and just use strvec consistently. There's no particular reason we have to do it all at once, or care about interactions between converted and unconverted bits. Because of our preprocessor compat layer, the names are interchangeable to the compiler (so even a definition and declaration using different names is OK). This patch converts all of the files in builtin/ to keep the diff to a manageable size. The conversion was done purely mechanically with: git ls-files '*.c' '*.h' | xargs perl -i -pe ' s/ARGV_ARRAY/STRVEC/g; s/argv_array/strvec/g; ' and then selectively staging files with "git add builtin/". We'll deal with any indentation/style fallouts separately. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-07-28strvec: rename files from argv-array to strvecLibravatar Jeff King1-1/+1
This requires updating #include lines across the code-base, but that's all fairly mechanical, and was done with: git ls-files '*.c' '*.h' | xargs perl -i -pe 's/argv-array.h/strvec.h/' Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>