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2021-09-20Merge branch 'lh/systemd-timers'Libravatar Junio C Hamano1-0/+57
"git maintenance" scheduler learned to use systemd timers as a possible backend. * lh/systemd-timers: maintenance: add support for systemd timers on Linux maintenance: `git maintenance run` learned `--scheduler=<scheduler>` cache.h: Introduce a generic "xdg_config_home_for(…)" function
2021-09-20Merge branch 'tb/multi-pack-bitmaps'Libravatar Junio C Hamano3-25/+76
The reachability bitmap file used to be generated only for a single pack, but now we've learned to generate bitmaps for history that span across multiple packfiles. * tb/multi-pack-bitmaps: (29 commits) pack-bitmap: drop bitmap_index argument from try_partial_reuse() pack-bitmap: drop repository argument from prepare_midx_bitmap_git() p5326: perf tests for MIDX bitmaps p5310: extract full and partial bitmap tests midx: respect 'GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP' t7700: update to work with MIDX bitmap test knob t5319: don't write MIDX bitmaps in t5319 t5310: disable GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP t0410: disable GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP t5326: test multi-pack bitmap behavior t/helper/test-read-midx.c: add --checksum mode t5310: move some tests to lib-bitmap.sh pack-bitmap: write multi-pack bitmaps pack-bitmap: read multi-pack bitmaps pack-bitmap.c: avoid redundant calls to try_partial_reuse pack-bitmap.c: introduce 'bitmap_is_preferred_refname()' pack-bitmap.c: introduce 'nth_bitmap_object_oid()' pack-bitmap.c: introduce 'bitmap_num_objects()' midx: avoid opening multiple MIDXs when writing midx: close linked MIDXs, avoid leaking memory ...
2021-09-15The sixth batchLibravatar Junio C Hamano1-0/+30
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-15Merge branch 'bs/doc-bugreport-outdir'Libravatar Junio C Hamano1-2/+2
Docfix. * bs/doc-bugreport-outdir: Documentation: fix default directory of git bugreport -o
2021-09-10The fifth batchLibravatar Junio C Hamano1-0/+61
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-10Merge branch 'ab/help-autocorrect-prompt'Libravatar Junio C Hamano1-7/+9
The logic for auto-correction of misspelt subcommands learned to go interactive when the help.autocorrect configuration variable is set to 'prompt'. * ab/help-autocorrect-prompt: help.c: help.autocorrect=prompt waits for user action
2021-09-10Merge branch 'jk/log-warn-on-bogus-encoding'Libravatar Junio C Hamano2-3/+5
Doc update plus improved error reporting. * jk/log-warn-on-bogus-encoding: docs: use "character encoding" to refer to commit-object encoding logmsg_reencode(): warn when iconv() fails
2021-09-10Merge branch 'es/walken-tutorial-fix'Libravatar Junio C Hamano1-2/+2
Typofix. * es/walken-tutorial-fix: doc: fix syntax error and the format of printf
2021-09-10Merge branch 'ka/want-ref-in-namespace'Libravatar Junio C Hamano1-5/+9
"git upload-pack" which runs on the other side of "git fetch" forgot to take the ref namespaces into account when handling want-ref requests. * ka/want-ref-in-namespace: docs: clarify the interaction of transfer.hideRefs and namespaces upload-pack.c: treat want-ref relative to namespace t5730: introduce fetch command helper
2021-09-10Merge branch 'js/advise-when-skipping-cherry-picked'Libravatar Junio C Hamano2-4/+11
"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
2021-09-08The fourth batchLibravatar Junio C Hamano1-0/+33
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-08Merge branch 'sg/column-nl'Libravatar Junio C Hamano1-1/+1
The parser for the "--nl" option of "git column" has been corrected. * sg/column-nl: column: fix parsing of the '--nl' option
2021-09-08Merge branch 'rs/branch-allow-deleting-dangling'Libravatar Junio C Hamano1-1/+2
"git branch -D <branch>" used to refuse to remove a broken branch ref that points at a missing commit, which has been corrected. * rs/branch-allow-deleting-dangling: branch: allow deleting dangling branches with --force
2021-09-07Documentation: fix default directory of git bugreport -oLibravatar Bagas Sanjaya1-2/+2
git bugreport writes bug report to the current directory by default, instead of repository root. Fix the documentation. Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-07maintenance: add support for systemd timers on LinuxLibravatar Lénaïc Huard1-5/+53
The existing mechanism for scheduling background maintenance is done through cron. On Linux systems managed by systemd, systemd provides an alternative to schedule recurring tasks: systemd timers. The main motivations to implement systemd timers in addition to cron are: * cron is optional and Linux systems running systemd might not have it installed. * The execution of `crontab -l` can tell us if cron is installed but not if the daemon is actually running. * With systemd, each service is run in its own cgroup and its logs are tagged by the service inside journald. With cron, all scheduled tasks are running in the cron daemon cgroup and all the logs of the user-scheduled tasks are pretended to belong to the system cron service. Concretely, a user that doesn’t have access to the system logs won’t have access to the log of their own tasks scheduled by cron whereas they will have access to the log of their own tasks scheduled by systemd timer. Although `cron` attempts to send email, that email may go unseen by the user because these days, local mailboxes are not heavily used anymore. In order to schedule git maintenance, we need two unit template files: * ~/.config/systemd/user/git-maintenance@.service to define the command to be started by systemd and * ~/.config/systemd/user/git-maintenance@.timer to define the schedule at which the command should be run. Those units are templates that are parameterized by the frequency. Based on those templates, 3 timers are started: * git-maintenance@hourly.timer * git-maintenance@daily.timer * git-maintenance@weekly.timer The command launched by those three timers are the same as with the other scheduling methods: /path/to/git for-each-repo --exec-path=/path/to --config=maintenance.repo maintenance run --schedule=%i with the full path for git to ensure that the version of git launched for the scheduled maintenance is the same as the one used to run `maintenance start`. The timer unit contains `Persistent=true` so that, if the computer is powered down when a maintenance task should run, the task will be run when the computer is back powered on. Signed-off-by: Lénaïc Huard <lenaic@lhuard.fr> Acked-by: Derrick Stolee <dstolee@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-07maintenance: `git maintenance run` learned `--scheduler=<scheduler>`Libravatar Lénaïc Huard1-0/+9
Depending on the system, different schedulers can be used to schedule the hourly, daily and weekly executions of `git maintenance run`: * `launchctl` for MacOS, * `schtasks` for Windows and * `crontab` for everything else. `git maintenance run` now has an option to let the end-user explicitly choose which scheduler he wants to use: `--scheduler=auto|crontab|launchctl|schtasks`. When `git maintenance start --scheduler=XXX` is run, it not only registers `git maintenance run` tasks in the scheduler XXX, it also removes the `git maintenance run` tasks from all the other schedulers to ensure we cannot have two schedulers launching concurrent identical tasks. The default value is `auto` which chooses a suitable scheduler for the system. `git maintenance stop` doesn't have any `--scheduler` parameter because this command will try to remove the `git maintenance run` tasks from all the available schedulers. Signed-off-by: Lénaïc Huard <lenaic@lhuard.fr> Acked-by: Derrick Stolee <dstolee@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-03The third batchLibravatar Junio C Hamano1-0/+25
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-03Merge branch 'ps/connectivity-optim'Libravatar Junio C Hamano1-1/+7
The revision traversal API has been optimized by taking advantage of the commit-graph, when available, to determine if a commit is reachable from any of the existing refs. * ps/connectivity-optim: revision: avoid hitting packfiles when commits are in commit-graph commit-graph: split out function to search commit position revision: stop retrieving reference twice connected: do not sort input revisions revision: separate walk and unsorted flags
2021-09-01pack-bitmap: write multi-pack bitmapsLibravatar Taylor Blau1-1/+11
Write multi-pack bitmaps in the format described by Documentation/technical/bitmap-format.txt, inferring their presence with the absence of '--bitmap'. To write a multi-pack bitmap, this patch attempts to reuse as much of the existing machinery from pack-objects as possible. Specifically, the MIDX code prepares a packing_data struct that pretends as if a single packfile has been generated containing all of the objects contained within the MIDX. Signed-off-by: Taylor Blau <me@ttaylorr.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-01midx: avoid opening multiple MIDXs when writingLibravatar Taylor Blau1-0/+2
Opening multiple instance of the same MIDX can lead to problems like two separate packed_git structures which represent the same pack being added to the repository's object store. The above scenario can happen because prepare_midx_pack() checks if `m->packs[pack_int_id]` is NULL in order to determine if a pack has been opened and installed in the repository before. But a caller can construct two copies of the same MIDX by calling get_multi_pack_index() and load_multi_pack_index() since the former manipulates the object store directly but the latter is a lower-level routine which allocates a new MIDX for each call. So if prepare_midx_pack() is called on multiple MIDXs with the same pack_int_id, then that pack will be installed twice in the object store's packed_git pointer. This can lead to problems in, for e.g., the pack-bitmap code, which does something like the following (in pack-bitmap.c:open_pack_bitmap()): struct bitmap_index *bitmap_git = ...; for (p = get_all_packs(r); p; p = p->next) { if (open_pack_bitmap_1(bitmap_git, p) == 0) ret = 0; } which is a problem if two copies of the same pack exist in the packed_git list because pack-bitmap.c:open_pack_bitmap_1() contains a conditional like the following: if (bitmap_git->pack || bitmap_git->midx) { /* ignore extra bitmap file; we can only handle one */ warning("ignoring extra bitmap file: %s", packfile->pack_name); close(fd); return -1; } Avoid this scenario by not letting write_midx_internal() open a MIDX that isn't also pointed at by the object store. So long as this is the case, other routines should prefer to open MIDXs with get_multi_pack_index() or reprepare_packed_git() instead of creating instances on their own. Because get_multi_pack_index() returns `r->object_store->multi_pack_index` if it is non-NULL, we'll only have one instance of a MIDX open at one time, avoiding these problems. To encourage this, drop the `struct multi_pack_index *` parameter from `write_midx_internal()`, and rely instead on the `object_dir` to find (or initialize) the correct MIDX instance. Likewise, replace the call to `close_midx()` with `close_object_store()`, since we're about to replace the MIDX with a new one and should invalidate the object store's memory of any MIDX that might have existed beforehand. Note that this now forbids passing object directories that don't belong to alternate repositories over `--object-dir`, since before we would have happily opened a MIDX in any directory, but now restrict ourselves to only those reachable by `r->objects->multi_pack_index` (and alternate MIDXs that we can see by walking the `next` pointer). As far as I can tell, supporting arbitrary directories with `--object-dir` was a historical accident, since even the documentation says `<alt>` when referring to the value passed to this option. Signed-off-by: Taylor Blau <me@ttaylorr.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-01midx: reject empty `--preferred-pack`'sLibravatar Taylor Blau1-3/+3
The soon-to-be-implemented multi-pack bitmap treats object in the first bit position specially by assuming that all objects in the pack it was selected from are also represented from that pack in the MIDX. In other words, the pack from which the first object was selected must also have all of its other objects selected from that same pack in the MIDX in case of any duplicates. But this assumption relies on the fact that there is at least one object in that pack to begin with; otherwise the object in the first bit position isn't from a preferred pack, in which case we can no longer assume that all objects in that pack were also selected from the same pack. Guard this assumption by checking the number of objects in the given preferred pack, and failing if the given pack is empty. To make sure we can safely perform this check, open any packs which are contained in an existing MIDX via prepare_midx_pack(). The same is done for new packs via the add_pack_to_midx() callback, but packs picked up from a previous MIDX will not yet have these opened. Signed-off-by: Taylor Blau <me@ttaylorr.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-01docs: clarify the interaction of transfer.hideRefs and namespacesLibravatar Kim Altintop1-5/+9
Expand the section about namespaces in the documentation of `transfer.hideRefs` to point out the subtle differences between `upload-pack` and `receive-pack`. ffcfb68176 (upload-pack.c: treat want-ref relative to namespace, 2021-07-30) taught `upload-pack` to reject `want-ref`s for hidden refs, which is now mentioned. It is clarified that at no point the name of a hidden ref is revealed, but the object id it points to may. Signed-off-by: Kim Altintop <kim@eagain.st> Reviewed-by: Jonathan Tan <jonathantanmy@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-08-30sequencer: advise if skipping cherry-picked commitLibravatar Josh Steadmon2-4/+11
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>
2021-08-30The second batchLibravatar Junio C Hamano1-0/+29
The most significant of this batch is of course "merge -sort". Thanks, Elijah and everybody who helped the topic. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-08-30Merge branch 'en/ort-becomes-the-default'Libravatar Junio C Hamano5-60/+67
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
2021-08-30Merge branch 'en/merge-strategy-docs'Libravatar Junio C Hamano4-40/+53
Documentation updates. * en/merge-strategy-docs: Update error message and code comment merge-strategies.txt: add coverage of the `ort` merge strategy git-rebase.txt: correct out-of-date and misleading text about renames merge-strategies.txt: fix simple capitalization error merge-strategies.txt: avoid giving special preference to patience algorithm merge-strategies.txt: do not imply using copy detection is desired merge-strategies.txt: update wording for the resolve strategy Documentation: edit awkward references to `git merge-recursive` directory-rename-detection.txt: small updates due to merge-ort optimizations git-rebase.txt: correct antiquated claims about --rebase-merges
2021-08-30Merge branch 'en/pull-conflicting-options'Libravatar Junio C Hamano3-9/+54
"git pull" had various corner cases that were not well thought out around its --rebase backend, e.g. "git pull --ff-only" did not stop but went ahead and rebased when the history on other side is not a descendant of our history. The series tries to fix them up. * en/pull-conflicting-options: pull: fix handling of multiple heads pull: update docs & code for option compatibility with rebasing pull: abort by default when fast-forwarding is not possible pull: make --rebase and --no-rebase override pull.ff=only pull: since --ff-only overrides, handle it first pull: abort if --ff-only is given and fast-forwarding is impossible t7601: add tests of interactions with multiple merge heads and config t7601: test interaction of merge/rebase/fast-forward flags and options
2021-08-30doc: fix syntax error and the format of printfLibravatar Zoker1-2/+2
Fix syntax and correct the format of printf in MyFirstObjectWalk.txt Signed-off-by: Zoker <kaixuanguiqu@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-08-27branch: allow deleting dangling branches with --forceLibravatar René Scharfe1-1/+2
git branch only allows deleting branches that point to valid commits. Skip that check if --force is given, as the caller is indicating with it that they know what they are doing and accept the consequences. This allows deleting dangling branches, which previously had to be reset to a valid start-point using --force first. Reported-by: Ulrich Windl <Ulrich.Windl@rz.uni-regensburg.de> Helped-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Helped-by: Junio C Hamano <gitster@pobox.com> Signed-off-by: René Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-08-27docs: use "character encoding" to refer to commit-object encodingLibravatar Jeff King2-2/+2
The word "encoding" can mean a lot of things (e.g., base64 or quoted-printable encoding in emails, HTML entities, URL encoding, and so on). The documentation for i18n.commitEncoding and i18n.logOutputEncoding uses the phrase "character encoding" to make this more clear. Let's use that phrase in other places to make it clear what kind of encoding we are talking about. This patch covers the gui.encoding option, as well as the --encoding option for git-log, etc (in this latter case, I word-smithed the sentence a little at the same time). That, coupled with the mention of iconv in the --encoding description, should make this more clear. The other spot I looked at is the working-tree-encoding section of gitattributes(5). But it gives specific examples of encodings that I think make the meaning pretty clear already. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-08-27logmsg_reencode(): warn when iconv() failsLibravatar Jeff King1-1/+3
If the user asks for a pretty-printed commit to be converted (either explicitly with --encoding=foo, or implicitly because the commit is non-utf8 and we want to convert it), we pass it through iconv(). If that fails, we fall back to showing the input verbatim, but don't tell the user that the output may be bogus. Let's add a warning to do so, along with a mention in the documentation for --encoding. Two things to note about the implementation: - we could produce the warning closer to the call to iconv() in reencode_string_len(), which would let us relay the value of errno. But this is not actually very helpful. reencode_string_len() does not know we are operating on a commit, and indeed does not know that the caller won't produce an error of its own. And the errno values from iconv() are seldom helpful (iconv_open() only ever produces EINVAL; perhaps EILSEQ from iconv() might be illuminating, but it can also return EINVAL for incomplete sequences). - if the reason for the failure is that the output charset is not supported, then the user will see this warning for every commit we try to display. That might be ugly and overwhelming, but on the other hand it is making it clear that every one of them has not been converted (and the likely outcome anyway is to re-try the command with a supported output encoding). Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-08-26column: fix parsing of the '--nl' optionLibravatar SZEDER Gábor1-1/+1
'git column's '--nl' option can be used to specify a "string to be printed at the end of each line" (quoting the man page), but this option and its mandatory argument has been parsed as OPT_INTEGER since the introduction of the command in 7e29b8254f (Add column layout skeleton and git-column, 2012-04-21). Consequently, any non-number argument is rejected by parse-options, and any number other than 0 leads to segfault: $ printf "%s\n" one two |git column --mode=plain --nl=foo error: option `nl' expects a numerical value $ printf "%s\n" one two |git column --mode=plain --nl=42 Segmentation fault (core dumped) $ printf "%s\n" one two |git column --mode=plain --nl=0 one two Parse this option as OPT_STRING. Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-08-24The first batch post 2.33Libravatar Junio C Hamano1-0/+48
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-08-24Merge branch 'es/trace2-log-parent-process-name'Libravatar Junio C Hamano1-0/+14
trace2 logs learned to show parent process name to see in what context Git was invoked. * es/trace2-log-parent-process-name: tr2: log parent process name tr2: make process info collection platform-generic
2021-08-24Merge branch 'js/expand-runtime-prefix'Libravatar Junio C Hamano1-0/+9
Pathname expansion (like "~username/") learned a way to specify a location relative to Git installation (e.g. its $sharedir which is $(prefix)/share), with "%(prefix)". * js/expand-runtime-prefix: expand_user_path: allow in-flight topics to keep using the old name interpolate_path(): allow specifying paths relative to the runtime prefix Use a better name for the function interpolating paths expand_user_path(): clarify the role of the `real_home` parameter expand_user_path(): remove stale part of the comment tests: exercise the RUNTIME_PREFIX feature
2021-08-24Merge branch 'ab/bundle-doc'Libravatar Junio C Hamano1-30/+117
Doc update. * ab/bundle-doc: bundle doc: replace "basis" with "prerequsite(s)" bundle doc: elaborate on rev<->ref restriction bundle doc: elaborate on object prerequisites bundle doc: rewrite the "DESCRIPTION" section
2021-08-24Merge branch 'zh/ref-filter-raw-data'Libravatar Junio C Hamano1-0/+9
Prepare the "ref-filter" machinery that drives the "--format" option of "git for-each-ref" and its friends to be used in "git cat-file --batch". * zh/ref-filter-raw-data: ref-filter: add %(rest) atom ref-filter: use non-const ref_format in *_atom_parser() ref-filter: --format=%(raw) support --perl ref-filter: add %(raw) atom ref-filter: add obj-type check in grab contents
2021-08-24Documentation: describe MIDX-based bitmapsLibravatar Taylor Blau2-21/+60
Update the technical documentation to describe the multi-pack bitmap format. This patch merely introduces the new format, and describes its high-level ideas. Git does not yet know how to read nor write these multi-pack variants, and so the subsequent patches will: - Introduce code to interpret multi-pack bitmaps, according to this document. - Then, introduce code to write multi-pack bitmaps from the 'git multi-pack-index write' sub-command. Finally, the implementation will gain tests in subsequent patches (as opposed to inline with the patch teaching Git how to write multi-pack bitmaps) to avoid a cyclic dependency. Signed-off-by: Taylor Blau <me@ttaylorr.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-08-16Git 2.33Libravatar Junio C Hamano1-4/+0
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-08-14help.c: help.autocorrect=prompt waits for user actionLibravatar Azeem Bande-Ali1-7/+9
If help.autocorrect is set to 'prompt', the user is prompted before the suggested action is executed. Based on original patch by David Barr https://lore.kernel.org/git/1283758030-13345-1-git-send-email-david.barr@cordelta.com/ Signed-off-by: Azeem Bande-Ali <me@azeemba.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-08-11Git 2.33-rc2Libravatar Junio C Hamano1-12/+0
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-08-11Merge branch 'jn/log-m-does-not-imply-p'Libravatar Junio C Hamano1-4/+4
Earlier "git log -m" was changed to always produce patch output, which would break existing scripts, which has been reverted. * jn/log-m-does-not-imply-p: Revert 'diff-merges: let "-m" imply "-p"'
2021-08-09Revert 'diff-merges: let "-m" imply "-p"'Libravatar Jonathan Nieder1-4/+4
This reverts commit f5bfcc823ba242a46e20fb6f71c9fbf7ebb222fe, which made "git log -m" imply "--patch" by default. The logic was that "-m", which makes diff generation for merges perform a diff against each parent, has no use unless I am viewing the diff, so we could save the user some typing by turning on display of the resulting diff automatically. That wasn't expected to adversely affect scripts because scripts would either be using a command like "git diff-tree" that already emits diffs by default or would be combining -m with a diff generation option such as --name-status. By saving typing for interactive use without adversely affecting scripts in the wild, it would be a pure improvement. The problem is that although diff generation options are only relevant for the displayed diff, a script author can imagine them affecting path limiting. For example, I might run git log -w --format=%H -- README hoping to list commits that edited README, excluding whitespace-only changes. In fact, a whitespace-only change is not TREESAME so the use of -w here has no effect (since we don't apply these diff generation flags to the diff_options struct rev_info::pruning used for this purpose), but the documentation suggests that it should work Suppose you specified foo as the <paths>. We shall call commits that modify foo !TREESAME, and the rest TREESAME. (In a diff filtered for foo, they look different and equal, respectively.) and a script author who has not tested whitespace-only changes wouldn't notice. Similarly, a script author could include git log -m --first-parent --format=%H -- README to filter the first-parent history for commits that modified README. The -m is a no-op but it reflects the script author's intent. For example, until 1e20a407fe2 (stash list: stop passing "-m" to "git log", 2021-05-21), "git stash list" did this. As a result, we can't safely change "-m" to imply "-p" without fear of breaking such scripts. Restore the previous behavior. Noticed because Rust's src/bootstrap/bootstrap.py made use of this same construct: https://github.com/rust-lang/rust/pull/87513. That script has been updated to omit the unnecessary "-m" option, but we can expect other scripts in the wild to have similar expectations. Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-08-09connected: do not sort input revisionsLibravatar Patrick Steinhardt1-1/+7
In order to compute whether objects reachable from a set of tips are all connected, we do a revision walk with these tips as positive references and `--not --all`. `--not --all` will cause the revision walk to load all preexisting references as uninteresting, which can be very expensive in repositories with many references. Benchmarking the git-rev-list(1) command highlights that by far the most expensive single phase is initial sorting of the input revisions: after all references have been loaded, we first sort commits by author date. In a real-world repository with about 2.2 million references, it makes up about 40% of the total runtime of git-rev-list(1). Ultimately, the connectivity check shouldn't really bother about the order of input revisions at all. We only care whether we can actually walk all objects until we hit the cut-off point. So sorting the input is a complete waste of time. Introduce a new "--unsorted-input" flag to git-rev-list(1) which will cause it to not sort the commits and adjust the connectivity check to always pass the flag. This results in the following speedups, executed in a clone of gitlab-org/gitlab [1]: Benchmark #1: git rev-list --objects --quiet --not --all --not $(cat newrev) Time (mean ± σ): 7.639 s ± 0.065 s [User: 7.304 s, System: 0.335 s] Range (min … max): 7.543 s … 7.742 s 10 runs Benchmark #2: git rev-list --unsorted-input --objects --quiet --not --all --not $newrev Time (mean ± σ): 4.995 s ± 0.044 s [User: 4.657 s, System: 0.337 s] Range (min … max): 4.909 s … 5.048 s 10 runs Summary 'git rev-list --unsorted-input --objects --quiet --not --all --not $(cat newrev)' ran 1.53 ± 0.02 times faster than 'git rev-list --objects --quiet --not --all --not $newrev' [1]: https://gitlab.com/gitlab-org/gitlab.git. Note that not all refs are visible to clients. Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-08-05Update docs for change of default merge backendLibravatar Elijah Newren5-60/+67
Make it clear that `ort` is the default merge strategy now rather than `recursive`, including moving `ort` to the front of the list of merge strategies. Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-08-05merge-strategies.txt: add coverage of the `ort` merge strategyLibravatar Elijah Newren1-0/+14
Acked-by: Derrick Stolee <dstolee@microsoft.com> Acked-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-08-05git-rebase.txt: correct out-of-date and misleading text about renamesLibravatar Elijah Newren1-3/+1
Commit 58634dbff8 ("rebase: Allow merge strategies to be used when rebasing", 2006-06-21) added the --merge option to git-rebase so that renames could be detected (at least when using the `recursive` merge backend). However, git-am -3 gained that same ability in commit 579c9bb198 ("Use merge-recursive in git-am -3.", 2006-12-28). As such, the comment about being able to detect renames is not particularly noteworthy. Remove it. Acked-by: Derrick Stolee <dstolee@microsoft.com> Acked-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-08-05merge-strategies.txt: fix simple capitalization errorLibravatar Elijah Newren1-1/+1
Acked-by: Derrick Stolee <dstolee@microsoft.com> Acked-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-08-05merge-strategies.txt: avoid giving special preference to patience algorithmLibravatar Elijah Newren1-5/+1
We already have diff-algorithm that explains why there are special diff algorithms, so we do not need to re-explain patience. patience exists as its own toplevel option for historical reasons, but there's no reason to give it special preference or document it again and suggest it's more important than other diff algorithms, so just refer to it as a deprecated shorthand for `diff-algorithm=patience`. Acked-by: Derrick Stolee <dstolee@microsoft.com> Acked-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-08-05merge-strategies.txt: do not imply using copy detection is desiredLibravatar Elijah Newren1-3/+3
Stating that the recursive strategy "currently cannot make use of detected copies" implies that this is a technical shortcoming of the current algorithm. I disagree with that. I don't see how copies could possibly be used in a sane fashion in a merge algorithm -- would we propagate changes in one file on one side of history to each copy of that file when merging? That makes no sense to me. I cannot think of anything else that would make sense either. Change the wording to simply state that we ignore any copies. Acked-by: Derrick Stolee <dstolee@microsoft.com> Acked-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>