Commit Graph

60785 Commits

Author SHA1 Message Date
Jean-Noël Avila
8dadc33bfb l10n: fr: v2.29.0 rnd 1
Signed-off-by: Jean-Noël Avila <jn.avila@free.fr>
2020-10-07 21:55:55 +02:00
Alessandro Menti
283aa916c6
l10n: it.po: update the Italian translation for Git 2.29.0 round 1
Signed-off-by: Alessandro Menti <alessandro.menti@alessandromenti.it>
2020-10-07 21:45:09 +02:00
Jeff King
bebe171947 index-pack: drop type_cas mutex
The type_cas lock lost all of its callers in f08cbf60fe (index-pack:
make quantum of work smaller, 2020-09-08), so we can safely delete it.
The compiler didn't alert us that the variable became unused, because we
still call pthread_mutex_init() and pthread_mutex_destroy() on it.

It's worth considering also whether that commit was in error to remove
the use of the lock. Why don't we need it now, if we did before, as
described in ab791dd138 (index-pack: fix race condition with duplicate
bases, 2014-08-29)? I think the answer is that we now look at and assign
the child_obj->real_type field in the main thread while holding the
work_lock(). So we don't have to worry about racing with the worker
threads.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-10-07 11:51:26 -07:00
Jeff King
cea69151a4 index-pack: restore "resolving deltas" progress meter
Commit f08cbf60fe (index-pack: make quantum of work smaller, 2020-09-08)
refactored the main loop in threaded_second_pass(), but also deleted the
call to display_progress() at the top of the loop. This means that users
typically see no progress at all during the delta resolution phase (and
for large repositories, Git appears to hang).

This looks like an accident that was unrelated to the intended change of
that commit, since we continue to update nr_resolved_deltas in
resolve_delta(). Let's restore the call to get that progress back.

We'll also add a test that confirms we generate the expected progress.
This isn't perfect, as it wouldn't catch a bug where progress was
delayed to the end. That was probably possible to trigger when receiving
a thin pack, because we'd eventually call display_progress() from
fix_unresolved_deltas(), but only once after doing all the work.
However, since our test case generates a complete pack, it reliably
demonstrates this particular bug and its fix. And we can't do better
without making the test racy.

Signed-off-by: Jeff King <peff@peff.net>
Acked-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-10-07 11:50:09 -07:00
Denton Liu
fcedb379fd compat/mingw.h: drop extern from function declaration
In 554544276a (*.[ch]: remove extern from function declarations using
spatch, 2019-04-29), `extern` on function declarations were declared to
be redundant and thus removed from the codebase. An `extern` was
accidentally reintroduced in 08809c09aa (mingw: add a helper function to
attach GDB to the current process, 2020-02-13).

Remove this spurious `extern`.

Signed-off-by: Denton Liu <liu.denton@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-10-07 09:55:20 -07:00
Johannes Schindelin
17c13069b4 GitHub workflow: automatically follow minor updates of setup-msbuild
It is the custom to follow minor updates of GitHub Actions
automatically, by using the suffix `@v1`. Actions' maintainers will then
update that `v1` ref to point to the newest.

However, for `microsoft/setup-msbuild`, 889cacb689 (ci: configure
GitHub Actions for CI/PR, 2020-04-11) uses a very specific `@v1.0.0`
suffix.

In this instance, that is a problem: should `setup-msbuild` release a
new version that intends to fix a critical bug, we won't know it, and we
won't use it.

Such a scenario is not theoretical. It is happening right now:
https://github.blog/changelog/2020-10-01-github-actions-deprecating-set-env-and-add-path-commands

Let's simplify our setup, allowing us to benefit from automatically
using the newest v1.x.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-10-07 09:54:53 -07:00
Serg Tereshchenko
c02efc1363 git-gui: improve dark mode support
The colors of some ttext widgets are hard-coded. These hard-coded colors
are okay with a light theme but with a dark theme some widgets are dark
colored and the hard-coded ones are still light. This defeats the
purpose of applying the theme and makes the UI look very awkward.

Remove the hard-coded colors in ttext calls and use colors from the
theme for those widgets via Text.Background and Text.Foreground from the
option database.

Similarly, the highlighting for the currently selected file(s) in the
"Staged Files" and "Unstaged Files" sections is also hard-coded. Pull
the colors for that from the current theme to make sure it is in line

Signed-off-by: Serg Tereshchenko <serg.partizan@gmail.com>
Signed-off-by: Pratyush Yadav <me@yadavpratyush.com>
2020-10-07 16:44:24 +05:30
Đoàn Trần Công Danh
2cd6e1d552 t5534: split stdout and stderr redirection
On atomic pushing failure with GnuPG, we expect a very specific output
in stdout due to `--porcelain` switch.

On such failure, we also write down some helpful hint into stderr
in order to help user understand what happens and how to continue from
those failures.

On a lot of system, those hint (in stderr) will be flushed first,
then those messages in stdout will be flushed. In such systems, the
current test code is fine as is.

However, we don't have such guarantee, (at least) there're some real
systems that writes those stream interleaved. On such systems, we may
see the stderr stream written in the middle of stdout stream.

Let's split those stream redirection. By splitting those stream,
the output stream will contain exactly what we want to compare,
thus, saving us a "sed" invocation.

While we're at it, change the `test_i18ncmp` to `test_cmp` because we
will never translate those messages (because of `--porcelain`).

Signed-off-by: Đoàn Trần Công Danh <congdanhqx@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-10-06 12:14:14 -07:00
Emir Sarı
ae372f11d4 l10n: tr: v2.29.0 round 1
Signed-off-by: Emir Sarı <bitigchi@me.com>
2020-10-06 16:44:21 +03:00
Jordi Mas
008a5d481e l10n: Update Catalan translation
Signed-off-by: Jordi Mas <jmas@softcatala.org>
2020-10-06 11:36:15 +02:00
Jiang Xin
e13da2db28 l10n: git.pot: v2.29.0 round 1 (124 new, 42 removed)
Generate po/git.pot from v2.29.0-rc0 for git v2.29.0 l10n round 1.

Signed-off-by: Jiang Xin <worldhello.net@gmail.com>
2020-10-06 09:16:18 +08:00
Junio C Hamano
d98273ba77 Git 2.29-rc0
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-10-05 14:01:56 -07:00
Junio C Hamano
542b3c2573 Merge branch 'nl/credential-crlf'
Loosen the parser in the receiving end of the credential protocol
to allow credential helper to terminate lines with CRLF line
ending, as well as LF line ending.

* nl/credential-crlf:
  credential: treat CR/LF as line endings in the credential protocol
2020-10-05 14:01:56 -07:00
Junio C Hamano
67af910276 Merge branch 'sn/fast-import-doc'
Doc update.

* sn/fast-import-doc:
  fast-import: fix typo in documentation
2020-10-05 14:01:56 -07:00
Junio C Hamano
9d19e1773c Merge branch 'pb/submodule-doc-fix'
Doc update.

* pb/submodule-doc-fix:
  gitsubmodules doc: invoke 'ls-files' with '--recurse-submodules'
2020-10-05 14:01:55 -07:00
Junio C Hamano
5f8c70a148 Merge branch 'jk/format-auto-base-when-able'
"git format-patch" learns to take "whenAble" as a possible value
for the format.useAutoBase configuration variable to become no-op
when the  automatically computed base does not make sense.

* jk/format-auto-base-when-able:
  format-patch: teach format.useAutoBase "whenAble" option
2020-10-05 14:01:55 -07:00
Junio C Hamano
7da656f1e0 Merge branch 'jk/diff-cc-oidfind-fix'
"log -c --find-object=X" did not work well to find a merge that
involves a change to an object X from only one parent.

* jk/diff-cc-oidfind-fix:
  combine-diff: handle --find-object in multitree code path
2020-10-05 14:01:55 -07:00
Junio C Hamano
8e3ec76a20 Merge branch 'jk/refspecs-negative'
"git fetch" and "git push" support negative refspecs.

* jk/refspecs-negative:
  refspec: add support for negative refspecs
2020-10-05 14:01:54 -07:00
Junio C Hamano
f6b06b4590 Merge branch 'rs/archive-add-file'
"git archive" learns the "--add-file" option to include untracked
files into a snapshot from a tree-ish.

* rs/archive-add-file:
  Makefile: use git-archive --add-file
  archive: add --add-file
  archive: read short blobs in archive.c::write_archive_entry()
2020-10-05 14:01:53 -07:00
Junio C Hamano
e68f0a4e57 Merge branch 'jt/keep-partial-clone-filter-upon-lazy-fetch'
The lazy fetching done internally to make missing objects available
in a partial clone incorrectly made permanent damage to the partial
clone filter in the repository, which has been corrected.

* jt/keep-partial-clone-filter-upon-lazy-fetch:
  fetch: do not override partial clone filter
  promisor-remote: remove unused variable
2020-10-05 14:01:53 -07:00
Junio C Hamano
300cd14ee9 Merge branch 'td/submodule-update-quiet'
"git submodule update --quiet" did not squelch underlying "rebase"
and "pull" commands.

* td/submodule-update-quiet:
  submodule update: silence underlying merge/rebase with "--quiet"
2020-10-05 14:01:53 -07:00
Junio C Hamano
19dd352d03 Merge branch 'jk/unused'
Code cleanup.

* jk/unused:
  dir.c: drop unused "untracked" from treat_path_fast()
  sequencer: handle ignore_footer when parsing trailers
  test-advise: check argument count with argc instead of argv
  sparse-checkout: fill in some options boilerplate
  sequencer: drop repository argument from run_git_commit()
  push: drop unused repo argument to do_push()
  assert PARSE_OPT_NONEG in parse-options callbacks
  env--helper: write to opt->value in parseopt helper
  drop unused argc parameters
  convert: drop unused crlf_action from check_global_conv_flags_eol()
2020-10-05 14:01:52 -07:00
Junio C Hamano
8250ab0b8c Merge branch 'js/cmake-vs'
Using the CMake support we added some time ago for real with Visual
Studio build revealed there were lot of usability improvements
possible, which have been carried out.

* js/cmake-vs:
  hashmap_for_each_entry(): workaround MSVC's runtime check failure #3
  cmake (Windows): recommend using Visual Studio's built-in CMake support
  cmake (Windows): initialize vcpkg/build dependencies automatically
  cmake (Windows): complain when encountering an unknown compiler
  cmake (Windows): let the `.dll` files be found when running the tests
  cmake: quote the path accurately when editing `test-lib.sh`
  cmake: fall back to using `vcpkg`'s `msgfmt.exe` on Windows
  cmake: ensure that the `vcpkg` packages are found on Windows
  cmake: do find Git for Windows' shell interpreter
  cmake: ignore files generated by CMake as run in Visual Studio
2020-10-05 14:01:52 -07:00
Junio C Hamano
07601b5b36 Merge branch 'ma/worktree-cleanups'
Code clean-up.

* ma/worktree-cleanups:
  worktree: use skip_prefix to parse target
  worktree: rename copy-pasted variable
  worktree: update renamed variable in comment
  worktree: inline `worktree_ref()` into its only caller
  wt-status: introduce wt_status_state_free_buffers()
  wt-status: print to s->fp, not stdout
  wt-status: replace sha1 mentions with oid
2020-10-05 14:01:52 -07:00
Junio C Hamano
34415c76c8 Merge branch 'so/combine-diff-simplify'
Code simplification.

* so/combine-diff-simplify:
  diff: get rid of redundant 'dense' argument
2020-10-05 14:01:51 -07:00
Junio C Hamano
58138d3f26 Merge branch 'js/default-branch-name-part-2'
Update the tests to drop word 'master' from them.

* js/default-branch-name-part-2:
  t9902: avoid using the branch name `master`
  tests: avoid variations of the `master` branch name
  t3200: avoid variations of the `master` branch name
  fast-export: avoid using unnecessary language in a code comment
  t/test-terminal: avoid non-inclusive language
2020-10-05 14:01:50 -07:00
Junio C Hamano
0cf28f6d47 Merge branch 'pm/gitk-update'
"gitk" update.

* pm/gitk-update:
  gitk: Resize panes correctly when reducing window size
  gitk: replace tabs with spaces
  gitk: fix the context menu not appearing in the presence of submodule diffs
  gitk: Un-hide selection in areas with non-default background color
  gitk: add diff lines background colors
  gitk: be prepared to be run in a bare repository
  gitk: Preserve window dimensions on exit when not using ttk themes
  gitk: don't highlight files after submodules as submodules
  gitk: fix branch name encoding error
  gitk: rename "commit summary" to "commit reference"
2020-10-05 14:01:50 -07:00
Junio C Hamano
c01b041ef0 Merge branch 'ds/in-merge-bases-many-optim-bug'
in_merge_bases_many(), a way to see if a commit is reachable from
any commit in a set of commits, was totally broken when the
commit-graph feature was in use, which has been corrected.

* ds/in-merge-bases-many-optim-bug:
  commit-reach: fix in_merge_bases_many bug
2020-10-05 14:01:50 -07:00
Samanta Navarro
3be01e5ab1 fast-import: fix typo in documentation
Signed-off-by: Samanta Navarro <ferivoz@riseup.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-10-04 12:56:29 -07:00
Philippe Blain
7d15fdbe4c gitsubmodules doc: invoke 'ls-files' with '--recurse-submodules'
`git ls-files` was never taught to respect the `submodule.recurse`
configuration variable, and it is too late now to change that [1],
but still the command is mentioned in 'gitsubmodules(7)' as if it
does respect that config.

Adjust the call in 'gitsubmodules(7)' by calling 'ls-files' with the
'--recurse-submodules' option.

While at it, uniformize the capitalization in that file, and use
backticks instead of quotes for Git commands and configuration
variables.

[1] https://lore.kernel.org/git/pull.732.git.1599707259907.gitgitgadget@gmail.com/T/#u

Signed-off-by: Philippe Blain <levraiphilippeblain@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-10-04 12:54:07 -07:00
Junio C Hamano
ab4691b67b Nineteenth batch
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-10-04 12:49:15 -07:00
Junio C Hamano
26b42b4dd8 Merge branch 'mt/delta-base-cache-races'
A race that leads to an access to a free'd data was corrected in
the codepath that reads pack files.

* mt/delta-base-cache-races:
  packfile: fix memory leak in add_delta_base_cache()
  packfile: fix race condition on unpack_entry()
2020-10-04 12:49:15 -07:00
Junio C Hamano
2fa8aacc72 Merge branch 'jk/shortlog-group-by-trailer'
"git shortlog" has been taught to group commits by the contents of
the trailer lines, like "Reviewed-by:", "Coauthored-by:", etc.

* jk/shortlog-group-by-trailer:
  shortlog: allow multiple groups to be specified
  shortlog: parse trailer idents
  shortlog: rename parse_stdin_ident()
  shortlog: de-duplicate trailer values
  shortlog: match commit trailers with --group
  trailer: add interface for iterating over commit trailers
  shortlog: add grouping option
  shortlog: change "author" variables to "ident"
2020-10-04 12:49:14 -07:00
Junio C Hamano
ea1f6118b7 Merge branch 'jc/fmt-merge-msg-suppress-destination'
Docfix.

* jc/fmt-merge-msg-suppress-destination:
  config/fmt-merge-msg.txt: drop space in quote
2020-10-04 12:49:13 -07:00
Junio C Hamano
d1b75045a0 Merge branch 'tb/upload-pack-filters'
Hotfix.

* tb/upload-pack-filters:
  config/uploadpack.txt: fix typo in `--filter=tree:<n>`
2020-10-04 12:49:12 -07:00
Junio C Hamano
84cdeed1cb Merge branch 'jc/sequencer-stopped-sha-simplify'
Code simplification.

* jc/sequencer-stopped-sha-simplify:
  sequencer: stop abbreviating stopped-sha file
2020-10-04 12:49:11 -07:00
Junio C Hamano
741f1f8131 Merge branch 'au/complete-restore-s'
The command line completion (in contrib/) learned that "git restore
-s <TAB>" is often followed by a refname.

* au/complete-restore-s:
  completion: complete refs after 'git restore -s'
  completion: use "prev" variable instead of introducing "prevword"
2020-10-04 12:49:09 -07:00
Junio C Hamano
03b0198e30 Merge branch 'al/ref-filter-merged-and-no-merged'
Hotfix.

* al/ref-filter-merged-and-no-merged:
  ref-filter: plug memory leak in reach_filter()
2020-10-04 12:49:09 -07:00
Junio C Hamano
9839cce4a7 Merge branch 'eg/mailinfo-doc-scissors'
The explanation of the "scissors line" has been clarified.

* eg/mailinfo-doc-scissors:
  Doc: show example scissors line
2020-10-04 12:49:09 -07:00
Junio C Hamano
f4cc68cbd0 Merge branch 'mr/bisect-in-c-2'
Rewrite of the "git bisect" script in C continues.

* mr/bisect-in-c-2:
  bisect--helper: reimplement `bisect_next` and `bisect_auto_next` shell functions in C
  bisect: call 'clear_commit_marks_all()' in 'bisect_next_all()'
  bisect--helper: reimplement `bisect_autostart` shell function in C
  bisect--helper: introduce new `write_in_file()` function
  bisect--helper: use '-res' in 'cmd_bisect__helper' return
  bisect--helper: BUG() in cmd_*() on invalid subcommand
2020-10-04 12:49:08 -07:00
Junio C Hamano
03a01824a4 Merge branch 'cc/bisect-start-fix'
"git bisect start X Y", when X and Y are not valid committish
object names, should take X and Y as pathspec, but didn't.

* cc/bisect-start-fix:
  bisect: don't use invalid oid as rev when starting
2020-10-04 12:49:08 -07:00
Junio C Hamano
230ff3e997 Merge branch 'jc/blame-ignore-fix'
"git blame --ignore-rev/--ignore-revs-file" failed to validate
their input are valid revision, and failed to take into account
that the user may want to give an annotated tag instead of a
commit, which has been corrected.

* jc/blame-ignore-fix:
  blame: validate and peel the object names on the ignore list
  t8013: minimum preparatory clean-up
2020-10-04 12:49:07 -07:00
Junio C Hamano
86cca370e1 Merge branch 'jk/drop-unaligned-loads'
Compilation fix around type punning.

* jk/drop-unaligned-loads:
  Revert "fast-export: use local array to store anonymized oid"
  bswap.h: drop unaligned loads
2020-10-04 12:49:06 -07:00
Junio C Hamano
94de88c986 Merge branch 'js/no-builtins-on-disk-option'
The installation procedure learned to optionally omit "git-foo"
executable files for each 'foo' built-in subcommand, which are only
required by old timers that still rely on the age old promise that
prepending "git --exec-path" output to PATH early in their script
will keep the "git-foo" calls they wrote working.

The old attempt to remove these executables from the disk failed in
the 1.6 era; it may be worth attempting again, but I think it is
worth to keep this topic separate from such a policy change to help
it graduate early.

* js/no-builtins-on-disk-option:
  ci: stop linking built-ins to the dashed versions
  Optionally skip linking/copying the built-ins
  msvc: copy the correct `.pdb` files in the Makefile target `install`
2020-10-04 12:49:05 -07:00
Junio C Hamano
5a25615d5c Merge branch 'ab/mediawiki-fixes'
Modernization and fixes to MediaWiki remote backend.

* ab/mediawiki-fixes:
  remote-mediawiki: use "sh" to eliminate unquoted commands
  remote-mediawiki: annotate unquoted uses of run_git()
  remote-mediawiki: convert to quoted run_git() invocation
  remote-mediawiki: provide a list form of run_git()
  remote-mediawiki tests: annotate failing tests
  remote-mediawiki: fix duplicate revisions being imported
  remote-mediawiki tests: use CLI installer
  remote-mediawiki tests: use inline PerlIO for readability
  remote-mediawiki tests: replace deprecated Perl construct
  remote-mediawiki tests: use a more idiomatic dispatch table
  remote-mediawiki tests: use "$dir/" instead of "$dir."
  remote-mediawiki tests: change `[]` to `test`
  remote-mediawiki tests: use test_cmp in tests
  remote-mediawiki tests: use a 10 character password
  remote-mediawiki tests: use the login/password variables
  remote-mediawiki doc: don't hardcode Debian PHP versions
  remote-mediawiki doc: link to MediaWiki's current version
  remote-mediawiki doc: correct link to GitHub project
2020-10-04 12:49:04 -07:00
Nikita Leonov
356c473295 credential: treat CR/LF as line endings in the credential protocol
This fix makes using Git credentials more friendly to Windows users: it
allows a credential helper to communicate using CR/LF line endings ("DOS
line endings" commonly found on Windows) instead of LF-only line endings
("Unix line endings").

Note that this changes the behavior a bit: if a credential helper
produces, say, a password with a trailing Carriage Return character,
that will now be culled even when the rest of the lines end only in Line
Feed characters, indicating that the Carriage Return was not meant to be
part of the line ending.

In practice, it seems _very_ unlikely that something like this happens.
Passwords usually need to consist of non-control characters, URLs need
to have special characters URL-encoded, and user names, well, are names.

However, it _does_ help on Windows, where CR/LF line endings are common:
as unrecognized commands are simply ignored by the credential machinery,
even a command like `quit\r` (which is clearly intended to abort) would
simply be ignored (silently) by Git.

So let's change the credential machinery to accept both CR/LF and LF
line endings.

While we do this for the credential helper protocol, we do _not_ adjust
`git credential-cache--daemon` (which won't work on Windows, anyway,
because it requires Unix sockets) nor `git credential-store` (which
writes the file `~/.git-credentials` which we consider an implementation
detail that should be opaque to the user, read: we do expect users _not_
to edit this file manually).

Signed-off-by: Nikita Leonov <nykyta.leonov@gmail.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-10-03 10:41:03 -07:00
Junio C Hamano
e2b9cb1c5a Merge remote-tracking branch 'paulus/master' into pm/gitk-update
* paulus/master:
  gitk: Resize panes correctly when reducing window size
  gitk: replace tabs with spaces
  gitk: fix the context menu not appearing in the presence of submodule diffs
  gitk: Un-hide selection in areas with non-default background color
  gitk: add diff lines background colors
  gitk: be prepared to be run in a bare repository
  gitk: Preserve window dimensions on exit when not using ttk themes
  gitk: don't highlight files after submodules as submodules
  gitk: fix branch name encoding error
  gitk: rename "commit summary" to "commit reference"
2020-10-03 10:06:27 -07:00
Paul Mackerras
6cd80496e9 gitk: Resize panes correctly when reducing window size
The resizeclistpanes and resizecdetpanes procedures attempt to keep
the horizontal proportions of the panes of the gitk window
approximately constant when the gitk window is resized.  However, if
the size is reduced enough that an existing sash position would go
outside the window, Tk moves the sash to the left to keep it inside
the window (without moving other sash positions to keep the
proportions).  This happens before these resize procedures get
control, and so they work with incorrect proportions.

To fix this, we record the sash positions we set previously and use
those previously-set sash positions rather than the current sash
positions when computing the proportions.

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
2020-10-03 15:20:33 +10:00
Denton Liu
e244588eb6 gitk: replace tabs with spaces
The source code is a mix of tabs and spaces. The indentation style
currently is four spaces per indent level but uses tabs every other
level (at eight spaces). Fix this inconsistent spacing and tabbing by
just using a space-indent for everything.

This was done mechanically by running:

	$ expand -i gitk >gitk.new
	$ mv gitk.new gitk

This patch should be empty with `--ignore-all-space`.

Signed-off-by: Denton Liu <liu.denton@gmail.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
2020-10-03 14:55:38 +10:00
Derrick Stolee
8791bf1841 commit-reach: fix in_merge_bases_many bug
Way back in f9b8908b (commit.c: use generation numbers for
in_merge_bases(), 2018-05-01), a heuristic was used to short-circuit
the in_merge_bases() walk. This works just fine as long as the
caller is checking only two commits, but when there are multiple,
there is a possibility that this heuristic is _very wrong_.

Some code moves since then has changed this method to
repo_in_merge_bases_many() inside commit-reach.c. The heuristic
computes the minimum generation number of the "reference" list, then
compares this number to the generation number of the "commit".

In a recent topic, a test was added that used in_merge_bases_many()
to test if a commit was reachable from a number of commits pulled
from a reflog. However, this highlighted the problem: if any of the
reference commits have a smaller generation number than the given
commit, then the walk is skipped _even if there exist some with
higher generation number_.

This heuristic is wrong! It must check the MAXIMUM generation number
of the reference commits, not the MINIMUM.

This highlights a testing gap. t6600-test-reach.sh covers many
methods in commit-reach.c, including in_merge_bases() and
get_merge_bases_many(), but since these methods either restrict to
two input commits or actually look for the full list of merge bases,
they don't check this heuristic!

Add a possible input to "test-tool reach" that tests
in_merge_bases_many() and add tests to t6600-test-reach.sh that
cover this heuristic. This includes cases for the reference commits
having generation above and below the generation of the input commit,
but also having maximum generation below the generation of the input
commit.

The fix itself is to swap min_generation with a max_generation in
repo_in_merge_bases_many().

Reported-by: Srinidhi Kaushik <shrinidhi.kaushik@gmail.com>
Helped-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-10-02 10:26:31 -07:00