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thirdparty/git.git
4 years agoMerge branch 'jk/clone-unborn-head-in-bare' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:47 +0000 (13:51 -0700)] 
Merge branch 'jk/clone-unborn-head-in-bare' into maint

"git clone" from a repository whose HEAD is unborn into a bare
repository didn't follow the branch name the other side used, which
is corrected.

* jk/clone-unborn-head-in-bare:
  clone: handle unborn branch in bare repos

4 years agoMerge branch 'en/stash-df-fix' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:47 +0000 (13:51 -0700)] 
Merge branch 'en/stash-df-fix' into maint

"git stash", where the tentative change involves changing a
directory to a file (or vice versa), was confused, which has been
corrected.

* en/stash-df-fix:
  stash: restore untracked files AFTER restoring tracked files
  stash: avoid feeding directories to update-index
  t3903: document a pair of directory/file bugs

4 years agoMerge branch 'jk/strvec-typefix' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:47 +0000 (13:51 -0700)] 
Merge branch 'jk/strvec-typefix' into maint

Correct nr and alloc members of strvec struct to be of type size_t.

* jk/strvec-typefix:
  strvec: use size_t to store nr and alloc

4 years agoMerge branch 'en/am-abort-fix' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:46 +0000 (13:51 -0700)] 
Merge branch 'en/am-abort-fix' into maint

When "git am --abort" fails to abort correctly, it still exited
with exit status of 0, which has been corrected.

* en/am-abort-fix:
  am: fix incorrect exit status on am fail to abort
  t4151: add a few am --abort tests
  git-am.txt: clarify --abort behavior

4 years agoMerge branch 'ps/update-ref-batch-flush' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:46 +0000 (13:51 -0700)] 
Merge branch 'ps/update-ref-batch-flush' into maint

"git update-ref --stdin" failed to flush its output as needed,
which potentially led the conversation to a deadlock.

* ps/update-ref-batch-flush:
  t1400: avoid SIGPIPE race condition on fifo
  update-ref: fix streaming of status updates

4 years agoMerge branch 'rs/no-mode-to-open-when-appending' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:46 +0000 (13:51 -0700)] 
Merge branch 'rs/no-mode-to-open-when-appending' into maint

The "mode" word is useless in a call to open(2) that does not
create a new file.  Such a call in the files backend of the ref
subsystem has been cleaned up.

* rs/no-mode-to-open-when-appending:
  refs/files-backend: remove unused open mode parameter

4 years agoMerge branch 'tb/pack-finalize-ordering' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:45 +0000 (13:51 -0700)] 
Merge branch 'tb/pack-finalize-ordering' into maint

The order in which various files that make up a single (conceptual)
packfile has been reevaluated and straightened up.  This matters in
correctness, as an incomplete set of files must not be shown to a
running Git.

* tb/pack-finalize-ordering:
  pack-objects: rename .idx files into place after .bitmap files
  pack-write: split up finish_tmp_packfile() function
  builtin/index-pack.c: move `.idx` files into place last
  index-pack: refactor renaming in final()
  builtin/repack.c: move `.idx` files into place last
  pack-write.c: rename `.idx` files after `*.rev`
  pack-write: refactor renaming in finish_tmp_packfile()
  bulk-checkin.c: store checksum directly
  pack.h: line-wrap the definition of finish_tmp_packfile()

4 years agoMerge branch 'rs/range-diff-avoid-segfault-with-I' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:45 +0000 (13:51 -0700)] 
Merge branch 'rs/range-diff-avoid-segfault-with-I' into maint

"git range-diff -I... <range> <range>" segfaulted, which has been
corrected.

* rs/range-diff-avoid-segfault-with-I:
  range-diff: avoid segfault with -I

4 years agoMerge branch 'ab/reverse-midx-optim' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:45 +0000 (13:51 -0700)] 
Merge branch 'ab/reverse-midx-optim' into maint

The code that optionally creates the *.rev reverse index file has
been optimized to avoid needless computation when it is not writing
the file out.

* ab/reverse-midx-optim:
  pack-write: skip *.rev work when not writing *.rev

4 years agoMerge branch 'jc/trivial-threeway-binary-merge' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:44 +0000 (13:51 -0700)] 
Merge branch 'jc/trivial-threeway-binary-merge' into maint

The "git apply -3" code path learned not to bother the lower level
merge machinery when the three-way merge can be trivially resolved
without the content level merge.

* jc/trivial-threeway-binary-merge:
  apply: resolve trivial merge without hitting ll-merge with "--3way"

4 years agoMerge branch 'ab/send-email-config-fix' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:44 +0000 (13:51 -0700)] 
Merge branch 'ab/send-email-config-fix' into maint

Regression fix.

* ab/send-email-config-fix:
  send-email: fix a "first config key wins" regression in v2.33.0

4 years agoMerge branch 'so/diff-index-regression-fix' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:44 +0000 (13:51 -0700)] 
Merge branch 'so/diff-index-regression-fix' into maint

Recent "diff -m" changes broke "gitk", which has been corrected.

* so/diff-index-regression-fix:
  diff-index: restore -c/--cc options handling

4 years agoMerge branch 'jk/log-warn-on-bogus-encoding' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:43 +0000 (13:51 -0700)] 
Merge branch 'jk/log-warn-on-bogus-encoding' into maint

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

4 years agoMerge branch 'tk/fast-export-anonymized-tag-fix' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:43 +0000 (13:51 -0700)] 
Merge branch 'tk/fast-export-anonymized-tag-fix' into maint

The output from "git fast-export", when its anonymization feature
is in use, showed an annotated tag incorrectly.

* tk/fast-export-anonymized-tag-fix:
  fast-export: fix anonymized tag using original length

4 years agoMerge branch 'mh/send-email-reset-in-reply-to' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:43 +0000 (13:51 -0700)] 
Merge branch 'mh/send-email-reset-in-reply-to' into maint

Even when running "git send-email" without its own threaded
discussion support, a threading related header in one message is
carried over to the subsequent message to result in an unwanted
threading, which has been corrected.

* mh/send-email-reset-in-reply-to:
  send-email: avoid incorrect header propagation

4 years agoMerge branch 'sg/set-ceiling-during-tests' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:42 +0000 (13:51 -0700)] 
Merge branch 'sg/set-ceiling-during-tests' into maint

Buggy tests could damage repositories outside the throw-away test
area we created.  We now by default export GIT_CEILING_DIRECTORIES
to limit the damage from such a stray test.

* sg/set-ceiling-during-tests:
  test-lib: set GIT_CEILING_DIRECTORIES to protect the surrounding repository

4 years agoMerge branch 'jh/sparse-index-resize-fix' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:42 +0000 (13:51 -0700)] 
Merge branch 'jh/sparse-index-resize-fix' into maint

The sparse-index support can corrupt the index structure by storing
a stale and/or uninitialized data, which has been corrected.

* jh/sparse-index-resize-fix:
  sparse-index: copy dir_hash in ensure_full_index()

4 years agoMerge branch 'ka/want-ref-in-namespace' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:42 +0000 (13:51 -0700)] 
Merge branch 'ka/want-ref-in-namespace' into maint

"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

4 years agoMerge branch 'sg/column-nl' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:41 +0000 (13:51 -0700)] 
Merge branch 'sg/column-nl' into maint

The parser for the "--nl" option of "git column" has been
corrected.

* sg/column-nl:
  column: fix parsing of the '--nl' option

4 years agoMerge branch 'cb/makefile-apple-clang' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:41 +0000 (13:51 -0700)] 
Merge branch 'cb/makefile-apple-clang' into maint

Build update for Apple clang.

* cb/makefile-apple-clang:
  build: catch clang that identifies itself as "$VENDOR clang"
  build: clang version may not be followed by extra words
  build: update detect-compiler for newer Xcode version

4 years agoMerge branch 'rs/branch-allow-deleting-dangling' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:41 +0000 (13:51 -0700)] 
Merge branch 'rs/branch-allow-deleting-dangling' into maint

"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

4 years agoMerge branch 'mt/quiet-with-delayed-checkout' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:40 +0000 (13:51 -0700)] 
Merge branch 'mt/quiet-with-delayed-checkout' into maint

The delayed checkout code path in "git checkout" etc. were chatty
even when --quiet and/or --no-progress options were given.

* mt/quiet-with-delayed-checkout:
  checkout: make delayed checkout respect --quiet and --no-progress

4 years agoMerge branch 'dd/diff-files-unmerged-fix' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:40 +0000 (13:51 -0700)] 
Merge branch 'dd/diff-files-unmerged-fix' into maint

"git diff --relative" segfaulted and/or produced incorrect result
when there are unmerged paths.

* dd/diff-files-unmerged-fix:
  diff-lib: ignore paths that are outside $cwd if --relative asked

4 years agoMerge branch 'rs/git-mmap-uses-malloc' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:39 +0000 (13:51 -0700)] 
Merge branch 'rs/git-mmap-uses-malloc' into maint

mmap() imitation used to call xmalloc() that dies upon malloc()
failure, which has been corrected to just return an error to the
caller to be handled.

* rs/git-mmap-uses-malloc:
  compat: let git_mmap use malloc(3) directly

4 years agoMerge branch 'pw/rebase-r-fixes' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:39 +0000 (13:51 -0700)] 
Merge branch 'pw/rebase-r-fixes' into maint

Various bugs in "git rebase -r" have been fixed.

* pw/rebase-r-fixes:
  rebase -r: fix merge -c with a merge strategy
  rebase -r: don't write .git/MERGE_MSG when fast-forwarding
  rebase -i: add another reword test
  rebase -r: make 'merge -c' behave like reword

4 years agoMerge branch 'pw/rebase-skip-final-fix' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:39 +0000 (13:51 -0700)] 
Merge branch 'pw/rebase-skip-final-fix' into maint

Checking out all the paths from HEAD during the last conflicted
step in "git rebase" and continuing would cause the step to be
skipped (which is expected), but leaves MERGE_MSG file behind in
$GIT_DIR and confuses the next "git commit", which has been
corrected.

* pw/rebase-skip-final-fix:
  rebase --continue: remove .git/MERGE_MSG
  rebase --apply: restore some tests
  t3403: fix commit authorship

4 years agoMerge branch 'cb/ci-use-upload-artifacts-v1' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:38 +0000 (13:51 -0700)] 
Merge branch 'cb/ci-use-upload-artifacts-v1' into maint

Use upload-artifacts v1 (instead of v2) for 32-bit linux, as the
new version has a blocker bug for that architecture.

* cb/ci-use-upload-artifacts-v1:
  ci: use upload-artifacts v1 for dockerized jobs

4 years agoMerge branch 'jk/commit-edit-fixup-fix' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:38 +0000 (13:51 -0700)] 
Merge branch 'jk/commit-edit-fixup-fix' into maint

"git commit --fixup" now works with "--edit" again, after it was
broken in v2.32.

* jk/commit-edit-fixup-fix:
  commit: restore --edit when combined with --fixup

4 years agoMerge branch 'jk/range-diff-fixes' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:38 +0000 (13:51 -0700)] 
Merge branch 'jk/range-diff-fixes' into maint

"git range-diff" code clean-up.

* jk/range-diff-fixes:
  range-diff: use ssize_t for parsed "len" in read_patches()
  range-diff: handle unterminated lines in read_patches()
  range-diff: drop useless "offset" variable from read_patches()

4 years agoMerge branch 'jk/apply-binary-hunk-parsing-fix' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:37 +0000 (13:51 -0700)] 
Merge branch 'jk/apply-binary-hunk-parsing-fix' into maint

"git apply" miscounted the bytes and failed to read to the end of
binary hunks.

* jk/apply-binary-hunk-parsing-fix:
  apply: keep buffer/size pair in sync when parsing binary hunks

4 years agoMerge branch 'en/pull-conflicting-options' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:36 +0000 (13:51 -0700)] 
Merge branch 'en/pull-conflicting-options' into maint

"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

4 years agoMerge branch 'jt/push-negotiation-fixes' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:36 +0000 (13:51 -0700)] 
Merge branch 'jt/push-negotiation-fixes' into maint

Bugfix for common ancestor negotiation recently introduced in "git
push" codepath.

* jt/push-negotiation-fixes:
  fetch: die on invalid --negotiation-tip hash
  send-pack: fix push nego. when remote has refs
  send-pack: fix push.negotiate with remote helper

4 years agoMerge branch 'ab/pack-stdin-packs-fix' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:35 +0000 (13:51 -0700)] 
Merge branch 'ab/pack-stdin-packs-fix' into maint

Input validation of "git pack-objects --stdin-packs" has been
corrected.

* ab/pack-stdin-packs-fix:
  pack-objects: fix segfault in --stdin-packs option
  pack-objects tests: cover blindspots in stdin handling

4 years agoMerge branch 'en/typofixes' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:35 +0000 (13:51 -0700)] 
Merge branch 'en/typofixes' into maint

Typofixes.

* en/typofixes:
  merge-ort: fix completely wrong comment
  trace2.h: fix trivial comment typo

4 years agoMerge branch 'cb/unicode-14' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:35 +0000 (13:51 -0700)] 
Merge branch 'cb/unicode-14' into maint

The unicode character width table (used for output alignment) has
been updated.

* cb/unicode-14:
  unicode: update the width tables to Unicode 14

4 years agoMerge branch 'po/git-config-doc-mentions-help-c' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:34 +0000 (13:51 -0700)] 
Merge branch 'po/git-config-doc-mentions-help-c' into maint

Doc update.

* po/git-config-doc-mentions-help-c:
  doc: config, tell readers of `git help --config`

4 years agoMerge branch 'kz/revindex-comment-fix' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:34 +0000 (13:51 -0700)] 
Merge branch 'kz/revindex-comment-fix' into maint

Header comment fix.

* kz/revindex-comment-fix:
  pack-revindex.h: correct the time complexity descriptions

4 years agoMerge branch 'cb/plug-leaks-in-alloca-emu-users' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:34 +0000 (13:51 -0700)] 
Merge branch 'cb/plug-leaks-in-alloca-emu-users' into maint

Leakfix.

* cb/plug-leaks-in-alloca-emu-users:
  t0000: avoid masking git exit value through pipes
  tree-diff: fix leak when not HAVE_ALLOCA_H

4 years agoMerge branch 'ma/doc-git-version' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:34 +0000 (13:51 -0700)] 
Merge branch 'ma/doc-git-version' into maint

Doc update.

* ma/doc-git-version:
  documentation: add documentation for 'git version'

4 years agoMerge branch 'rs/drop-core-compression-vars' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:33 +0000 (13:51 -0700)] 
Merge branch 'rs/drop-core-compression-vars' into maint

Code clean-up.

* rs/drop-core-compression-vars:
  compression: drop write-only core_compression_* variables

4 years agoMerge branch 'jk/t5562-racefix' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:33 +0000 (13:51 -0700)] 
Merge branch 'jk/t5562-racefix' into maint

Test update.

* jk/t5562-racefix:
  t5562: use alarm() to interrupt timed child-wait

4 years agoMerge branch 'rs/setup-use-xopen-and-xdup' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:33 +0000 (13:51 -0700)] 
Merge branch 'rs/setup-use-xopen-and-xdup' into maint

Code clean-up.

* rs/setup-use-xopen-and-xdup:
  setup: use xopen and xdup in sanitize_stdfds

4 years agoMerge branch 'jc/prefix-filename-allocates' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:32 +0000 (13:51 -0700)] 
Merge branch 'jc/prefix-filename-allocates' into maint

Leakfix.

* jc/prefix-filename-allocates:
  hash-object: prefix_filename() returns allocated memory these days

4 years agoMerge branch 'ab/no-more-check-bindir' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:32 +0000 (13:51 -0700)] 
Merge branch 'ab/no-more-check-bindir' into maint

Build simplification.

* ab/no-more-check-bindir:
  Makefile: remove the check_bindir script

4 years agoMerge branch 'bs/doc-bugreport-outdir' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:32 +0000 (13:51 -0700)] 
Merge branch 'bs/doc-bugreport-outdir' into maint

Docfix.

* bs/doc-bugreport-outdir:
  Documentation: fix default directory of git bugreport -o

4 years agoMerge branch 'cb/ci-build-pedantic' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:31 +0000 (13:51 -0700)] 
Merge branch 'cb/ci-build-pedantic' into maint

CI update.

* cb/ci-build-pedantic:
  ci: run a pedantic build as part of the GitHub workflow

4 years agoMerge branch 'rs/archive-use-object-id' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:31 +0000 (13:51 -0700)] 
Merge branch 'rs/archive-use-object-id' into maint

Code cleanup.

* rs/archive-use-object-id:
  archive: convert queue_directory to struct object_id

4 years agoMerge branch 'rs/show-branch-simplify' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:31 +0000 (13:51 -0700)] 
Merge branch 'rs/show-branch-simplify' into maint

Code cleanup.

* rs/show-branch-simplify:
  show-branch: simplify rev_is_head()

4 years agoMerge branch 'cb/remote-ndebug-fix' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:30 +0000 (13:51 -0700)] 
Merge branch 'cb/remote-ndebug-fix' into maint

Build fix.

* cb/remote-ndebug-fix:
  remote: avoid -Wunused-but-set-variable in gcc with -DNDEBUG

4 years agoMerge branch 'ab/mailmap-leakfix' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:30 +0000 (13:51 -0700)] 
Merge branch 'ab/mailmap-leakfix' into maint

Leakfix.

* ab/mailmap-leakfix:
  mailmap.c: fix a memory leak in free_mailap_{info,entry}()

4 years agoMerge branch 'ab/gc-log-rephrase' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:30 +0000 (13:51 -0700)] 
Merge branch 'ab/gc-log-rephrase' into maint

A pathname in an advice message has been made cut-and-paste ready.

* ab/gc-log-rephrase:
  gc: remove trailing dot from "gc.log" line

4 years agoMerge branch 'ba/object-info' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:29 +0000 (13:51 -0700)] 
Merge branch 'ba/object-info' into maint

Leakfix.

* ba/object-info:
  protocol-caps.c: fix memory leak in send_info()

4 years agoMerge branch 'es/walken-tutorial-fix' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:29 +0000 (13:51 -0700)] 
Merge branch 'es/walken-tutorial-fix' into maint

Typofix.

* es/walken-tutorial-fix:
  doc: fix syntax error and the format of printf

4 years agoMerge branch 'rs/xopen-reports-open-failures' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:28 +0000 (13:51 -0700)] 
Merge branch 'rs/xopen-reports-open-failures' into maint

Error diagnostics improvement.

* rs/xopen-reports-open-failures:
  use xopen() to handle fatal open(2) failures
  xopen: explicitly report creation failures

4 years agoMerge branch 'dd/t6300-wo-gpg-fix' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:28 +0000 (13:51 -0700)] 
Merge branch 'dd/t6300-wo-gpg-fix' into maint

Test fix.

* dd/t6300-wo-gpg-fix:
  t6300: check for cat-file exit status code
  t6300: don't run cat-file on non-existent object

4 years agoMerge branch 'mh/credential-leakfix' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:28 +0000 (13:51 -0700)] 
Merge branch 'mh/credential-leakfix' into maint

Leak fix.

* mh/credential-leakfix:
  credential: fix leak in credential_apply_config()

4 years agoMerge branch 'jk/t5323-no-pack-test-fix' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:27 +0000 (13:51 -0700)] 
Merge branch 'jk/t5323-no-pack-test-fix' into maint

Test fix.

* jk/t5323-no-pack-test-fix:
  t5323: drop mentions of "master"

4 years agoMerge branch 'js/maintenance-launchctl-fix' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:27 +0000 (13:51 -0700)] 
Merge branch 'js/maintenance-launchctl-fix' into maint

"git maintenance" scheduler fix for macOS.

* js/maintenance-launchctl-fix:
  maintenance: skip bootout/bootstrap when plist is registered
  maintenance: create `launchctl` configuration using a lock file

4 years agoMerge branch 'ab/rebase-fatal-fatal-fix' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:27 +0000 (13:51 -0700)] 
Merge branch 'ab/rebase-fatal-fatal-fix' into maint

Error message fix.

* ab/rebase-fatal-fatal-fix:
  rebase: emit one "fatal" in "fatal: fatal: <error>"

4 years agoMerge branch 'ab/ls-remote-packet-trace' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:26 +0000 (13:51 -0700)] 
Merge branch 'ab/ls-remote-packet-trace' into maint

Debugging aid fix.

* ab/ls-remote-packet-trace:
  ls-remote: set packet_trace_identity(<name>)

4 years agoMerge branch 'ga/send-email-sendmail-cmd' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:26 +0000 (13:51 -0700)] 
Merge branch 'ga/send-email-sendmail-cmd' into maint

Test fix.

* ga/send-email-sendmail-cmd:
  t9001: PATH must not use Windows-style paths

4 years agoMerge branch 'me/t5582-cleanup' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:25 +0000 (13:51 -0700)] 
Merge branch 'me/t5582-cleanup' into maint

Test fix.

* me/t5582-cleanup:
  t5582: remove spurious 'cd "$D"' line

4 years agoMerge branch 'sg/make-fix-ar-invocation' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:25 +0000 (13:51 -0700)] 
Merge branch 'sg/make-fix-ar-invocation' into maint

Build fix.

* sg/make-fix-ar-invocation:
  Makefile: remove archives before manipulating them with 'ar'

4 years agoMerge branch 'ti/tcsh-completion-regression-fix' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:24 +0000 (13:51 -0700)] 
Merge branch 'ti/tcsh-completion-regression-fix' into maint

Update to the command line completion (in contrib/) for tcsh.

* ti/tcsh-completion-regression-fix:
  completion: tcsh: Fix regression by drop of wrapper functions

4 years agoMerge branch 'fc/completion-updates' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:24 +0000 (13:51 -0700)] 
Merge branch 'fc/completion-updates' into maint

Command line completion updates.

* fc/completion-updates:
  completion: bash: add correct suffix in variables
  completion: bash: fix for multiple dash commands
  completion: bash: fix for suboptions with value
  completion: bash: fix prefix detection in branch.*

4 years agoMerge branch 'cb/ci-freebsd-update' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:24 +0000 (13:51 -0700)] 
Merge branch 'cb/ci-freebsd-update' into maint

Update FreeBSD CI job

* cb/ci-freebsd-update:
  ci: update freebsd 12 cirrus job

4 years agoMerge branch 'cb/builtin-merge-format-string-fix' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:23 +0000 (13:51 -0700)] 
Merge branch 'cb/builtin-merge-format-string-fix' into maint

Code clean-up.

* cb/builtin-merge-format-string-fix:
  builtin/merge: avoid -Wformat-extra-args from ancient Xcode

4 years agoMerge branch 'js/log-protocol-version' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:22 +0000 (13:51 -0700)] 
Merge branch 'js/log-protocol-version' into maint

Debugging aid.

* js/log-protocol-version:
  connect, protocol: log negotiated protocol version

4 years agoMerge branch 'en/merge-strategy-docs' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:22 +0000 (13:51 -0700)] 
Merge branch 'en/merge-strategy-docs' into maint

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

4 years agoMerge branch 'ab/bundle-doc' into maint
Junio C Hamano [Tue, 12 Oct 2021 20:51:22 +0000 (13:51 -0700)] 
Merge branch 'ab/bundle-doc' into maint

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

4 years agoclone: handle unborn branch in bare repos
Jeff King [Mon, 20 Sep 2021 19:04:10 +0000 (15:04 -0400)] 
clone: handle unborn branch in bare repos

When cloning a repository with an unborn HEAD, we'll set the local HEAD
to match it only if the local repository is non-bare. This is
inconsistent with all other combinations:

  remote HEAD       | local repo | local HEAD
  -----------------------------------------------
  points to commit  | non-bare   | same as remote
  points to commit  | bare       | same as remote
  unborn            | non-bare   | same as remote
  unborn            | bare       | local default

So I don't think this is some clever or subtle behavior, but just a bug
in 4f37d45706 (clone: respect remote unborn HEAD, 2021-02-05). And it's
easy to see how we ended up there. Before that commit, the code to set
up the HEAD for an empty repo was guarded by "if (!option_bare)". That's
because the only thing it did was call install_branch_config(), and we
don't want to do so for a bare repository (unborn HEAD or not).

That commit put the handling of unborn HEADs into the same block, since
those also need to call install_branch_config(). But the unborn case has
an additional side effect of calling create_symref(), and we want that
to happen whether we are bare or not.

This patch just pulls all of the "figure out the default branch" code
out of the "!option_bare" block. Only the actual config installation is
kept there.

Note that this does mean we might allocate "ref" and not use it (if the
remote is empty but did not advertise an unborn HEAD). But that's not
really a big deal since this isn't a hot code path, and it keeps the
code simple. The alternative would be handling unborn_head_target
separately, but that gets confusing since its memory ownership is
tangled up with the "ref" variable.

There's just one new test, for the case we're fixing. The other ones in
the table are handled elsewhere (the unborn non-bare case just above,
and the actually-born cases in t5601, t5606, and t5609, as they do not
require v2's "unborn" protocol extension).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
4 years agomerge-ort: fix completely wrong comment
Elijah Newren [Sun, 19 Sep 2021 01:48:55 +0000 (01:48 +0000)] 
merge-ort: fix completely wrong comment

Not sure what happened, but the comment is describing code elsewhere in
the file.  Fix the comment to actually discuss the code that follows.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
4 years agotrace2.h: fix trivial comment typo
Elijah Newren [Sun, 19 Sep 2021 01:48:54 +0000 (01:48 +0000)] 
trace2.h: fix trivial comment typo

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
4 years agounicode: update the width tables to Unicode 14
Carlo Marcelo Arenas Belón [Fri, 17 Sep 2021 19:19:20 +0000 (12:19 -0700)] 
unicode: update the width tables to Unicode 14

Released[0] after a long beta period and including several additional
zero/double width characters.

[0] https://home.unicode.org/announcing-the-unicode-standard-version-14-0/

Signed-off-by: Carlo Marcelo Arenas Belón <carenas@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
4 years agot0000: avoid masking git exit value through pipes
Carlo Marcelo Arenas Belón [Thu, 16 Sep 2021 08:55:23 +0000 (01:55 -0700)] 
t0000: avoid masking git exit value through pipes

9af0b8dbe2 (t0000-basic: more commit-tree tests., 2006-04-26) adds
tests for commit-tree that mask the return exit from git as described
in a378fee5b07 (Documentation: add shell guidelines, 2018-10-05).

Fix the tests, to avoid pipes by using a temporary file instead.

Signed-off-by: Carlo Marcelo Arenas Belón <carenas@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
4 years agotree-diff: fix leak when not HAVE_ALLOCA_H
Carlo Marcelo Arenas Belón [Thu, 16 Sep 2021 08:55:22 +0000 (01:55 -0700)] 
tree-diff: fix leak when not HAVE_ALLOCA_H

b8ba412bf7 (tree-diff: avoid alloca for large allocations, 2016-06-07)
adds a way to route some bigger allocations out of the stack and free
them through the addition of two conveniently named macros, but leaves
the calls to free the xalloca part, which could be also in the heap,
if the system doesn't HAVE_ALLOCA_H (ex: macOS and other BSD).

Add the missing free call, xalloca_free(), which is a noop if we
allocated memory in the stack frame, but a real free() if we
allocated in the heap instead, and while at it, change the expression
to match in both macros for ease of readability.

This avoids a leak reported by LSAN while running t0000 but that
wouldn't fail the test (which is fixed in the next patch):

  SUMMARY: LeakSanitizer: 1034 byte(s) leaked in 15 allocation(s).

Signed-off-by: Carlo Marcelo Arenas Belón <carenas@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
4 years agopack-revindex.h: correct the time complexity descriptions
Kyle Zhao [Wed, 15 Sep 2021 09:09:23 +0000 (09:09 +0000)] 
pack-revindex.h: correct the time complexity descriptions

Time complexities for pack_pos_to_midx and midx_to_pack_pos are swapped,
correct it.

Signed-off-by: Kyle Zhao <kylezhao@tencent.com>
Reviewed-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
4 years agot1400: avoid SIGPIPE race condition on fifo
Jeff King [Wed, 15 Sep 2021 17:24:52 +0000 (13:24 -0400)] 
t1400: avoid SIGPIPE race condition on fifo

t1400.190 sometimes fails or even hangs because of the way it uses
fifos. Our goal is to interactively read and write lines from
update-ref, so we have two fifos, in and out. We open a descriptor
connected to "in" and redirect output to that, so that update-ref does
not see EOF as it would if we opened and closed it for each "echo" call.

But we don't do the same for the output. This leads to a race where our
"read response <out" has not yet opened the fifo, but update-ref tries
to write to it and gets SIGPIPE. This can result in the test failing, or
worse, hanging as we wait forever for somebody to write to the pipe.

This is the same proble we fixed in 4783e7ea83 (t0008: avoid SIGPIPE
race condition on fifo, 2013-07-12), and we can fix it the same way, by
opening a second long-running descriptor.

Before this patch, running:

  ./t1400-update-ref.sh --run=1,190 --stress

failed or hung within a few dozen iterations. After it, I ran it for
several hundred without problems.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
4 years agodocumentation: add documentation for 'git version'
Matthias Aßhauer [Tue, 14 Sep 2021 13:27:18 +0000 (13:27 +0000)] 
documentation: add documentation for 'git version'

While 'git version' is probably the least complex git command,
it is a non-experimental user-facing builtin command. As such
it should have a help page.

Both `git help` and `git version` can be called as options
(`--help`/`--version`) that internally get converted to the
corresponding command. Add a small paragraph to
Documentation/git.txt describing how these two options
interact with each other and link to this help page for the
sub-options that `--version` can take. Well, currently there
is only one sub-option, but that could potentially increase
in future versions of Git.

Signed-off-by: Matthias Aßhauer <mha1993@live.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
4 years agodoc: config, tell readers of `git help --config`
Philip Oakley [Mon, 13 Sep 2021 21:23:05 +0000 (22:23 +0100)] 
doc: config, tell readers of `git help --config`

The `git help` command gained the ability to list config variables in
3ac68a93fd (help: add --config to list all available config, 2018-05-26)
but failed to tell readers of the config documenation itself.

Provide that cross reference.

Signed-off-by: Philip Oakley <philipoakley@iee.email>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
4 years agostrvec: use size_t to store nr and alloc
Jeff King [Sat, 11 Sep 2021 15:01:16 +0000 (11:01 -0400)] 
strvec: use size_t to store nr and alloc

We converted argv_array (which later became strvec) to use size_t in
819f0e76b1 (argv-array: use size_t for count and alloc, 2020-07-28) in
order to avoid the possibility of integer overflow. But later, commit
d70a9eb611 (strvec: rename struct fields, 2020-07-28) accidentally
converted these back to ints!

Those two commits were part of the same patch series. I'm pretty sure
what happened is that they were originally written in the opposite order
and then cleaned up and re-ordered during an interactive rebase. And
when resolving the inevitable conflict, I mistakenly took the "rename"
patch completely, accidentally dropping the type change.

We can correct it now; better late than never.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
4 years agocompression: drop write-only core_compression_* variables
René Scharfe [Sat, 11 Sep 2021 11:45:43 +0000 (13:45 +0200)] 
compression: drop write-only core_compression_* variables

Since 8de7eeb54b (compression: unify pack.compression configuration
parsing, 2016-11-15) the variables core_compression_level and
core_compression_seen are only set, but never read.  Remove them.

Signed-off-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
4 years agoam: fix incorrect exit status on am fail to abort
Elijah Newren [Fri, 10 Sep 2021 10:31:16 +0000 (10:31 +0000)] 
am: fix incorrect exit status on am fail to abort

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
4 years agot4151: add a few am --abort tests
Elijah Newren [Fri, 10 Sep 2021 10:31:15 +0000 (10:31 +0000)] 
t4151: add a few am --abort tests

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
4 years agogit-am.txt: clarify --abort behavior
Elijah Newren [Fri, 10 Sep 2021 10:31:14 +0000 (10:31 +0000)] 
git-am.txt: clarify --abort behavior

Both Johannes and I assumed (perhaps due to familiarity with rebase)
that am --abort would return the user to a clean state.  However, since
am, unlike rebase, is intended to be used within a dirty working tree,
--abort will only clean the files involved in the am operation.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
4 years agostash: restore untracked files AFTER restoring tracked files
Elijah Newren [Fri, 10 Sep 2021 10:29:56 +0000 (10:29 +0000)] 
stash: restore untracked files AFTER restoring tracked files

If a user deletes a file and places a directory of untracked files
there, then stashes all these changes, the untracked directory of files
cannot be restored until after the corresponding file in the way is
removed.  So, restore changes to tracked files before restoring
untracked files.

There is no counterpart problem to worry about with the user deleting an
untracked file and then add a tracked one in its place.  Git does not
track untracked files, and so will not know the untracked file was
deleted, and thus won't be able to stash the removal of that file.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
4 years agostash: avoid feeding directories to update-index
Elijah Newren [Fri, 10 Sep 2021 10:29:55 +0000 (10:29 +0000)] 
stash: avoid feeding directories to update-index

When a file is removed from the cache, but there is a file of the same
name present in the working directory, we would normally treat that file
in the working directory as untracked.  However, in the case of stash,
doing that would prevent a simple 'git stash push', because the untracked
file would be in the way of restoring the deleted file.

git stash, however, blindly assumes that whatever is in the working
directory for a deleted file is wanted and passes that path along to
update-index.  That causes problems when the working directory contains
a directory with the same name as the deleted file.  Add some code for
this special case that will avoid passing directory names to
update-index.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
4 years agot3903: document a pair of directory/file bugs
Elijah Newren [Fri, 10 Sep 2021 10:29:54 +0000 (10:29 +0000)] 
t3903: document a pair of directory/file bugs

There are three tests here, because the second bug is documented with
two tests: a file -> directory change and a directory -> file change.
The reason for the two tests is just to verify that both are indeed
broken but that both will be fixed by the same simple change (which will
be provided in a subsequent patch).

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
4 years agopack-objects: rename .idx files into place after .bitmap files
Ævar Arnfjörð Bjarmason [Thu, 9 Sep 2021 23:25:00 +0000 (19:25 -0400)] 
pack-objects: rename .idx files into place after .bitmap files

In preceding commits the race of renaming .idx files in place before
.rev files and other auxiliary files was fixed in pack-write.c's
finish_tmp_packfile(), builtin/repack.c's "struct exts", and
builtin/index-pack.c's final(). As noted in the change to pack-write.c
we left in place the issue of writing *.bitmap files after the *.idx,
let's fix that issue.

See 7cc8f971085 (pack-objects: implement bitmap writing, 2013-12-21)
for commentary at the time when *.bitmap was implemented about how
those files are written out, nothing in that commit contradicts what's
being done here.

Note that this commit and preceding ones only close any race condition
with *.idx files being written before their auxiliary files if we're
optimistic about our lack of fsync()-ing in this are not tripping us
over. See the thread at [1] for a rabbit hole of various discussions
about filesystem races in the face of doing and not doing fsync() (and
if doing fsync(), not doing it properly).

We may want to fsync the containing directory once after renaming the
*.idx file into place, but that is outside the scope of this series.

1. https://lore.kernel.org/git/8735qgkvv1.fsf@evledraar.gmail.com/

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
4 years agopack-write: split up finish_tmp_packfile() function
Ævar Arnfjörð Bjarmason [Thu, 9 Sep 2021 23:24:56 +0000 (19:24 -0400)] 
pack-write: split up finish_tmp_packfile() function

Split up the finish_tmp_packfile() function and use the split-up version
in pack-objects.c in preparation for moving the step of renaming the
*.idx file later as part of a function change.

Since the only other caller of finish_tmp_packfile() was in
bulk-checkin.c, and it won't be needing a change to its *.idx renaming,
provide a thin wrapper for the old function as a static function in that
file. If other callers end up needing the simpler version it could be
moved back to "pack-write.c" and "pack.h".

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
4 years agobuiltin/index-pack.c: move `.idx` files into place last
Taylor Blau [Thu, 9 Sep 2021 23:24:53 +0000 (19:24 -0400)] 
builtin/index-pack.c: move `.idx` files into place last

In a similar spirit as preceding patches to `git repack` and `git
pack-objects`, fix the identical problem in `git index-pack`.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
4 years agoindex-pack: refactor renaming in final()
Ævar Arnfjörð Bjarmason [Thu, 9 Sep 2021 23:24:49 +0000 (19:24 -0400)] 
index-pack: refactor renaming in final()

Refactor the renaming in final() into a helper function, this is
similar in spirit to a preceding refactoring of finish_tmp_packfile()
in pack-write.c.

Before e37d0b8730b (builtin/index-pack.c: write reverse indexes,
2021-01-25) it probably wasn't worth it to have this sort of helper,
due to the differing "else if" case for "pack" files v.s. "idx" files.

But since we've got "rev" as well now, let's do the renaming via a
helper, this is both a net decrease in lines, and improves the
readability, since we can easily see at a glance that the logic for
writing these three types of files is exactly the same, aside from the
obviously differing cases of "*final_name" being NULL, and
"make_read_only_if_same" being different.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
4 years agobuiltin/repack.c: move `.idx` files into place last
Taylor Blau [Thu, 9 Sep 2021 23:24:44 +0000 (19:24 -0400)] 
builtin/repack.c: move `.idx` files into place last

In a similar spirit as the previous patch, fix the identical problem
from `git repack` (which invokes `pack-objects` with a temporary
location for output, and then moves the files into their final locations
itself).

Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
4 years agopack-write.c: rename `.idx` files after `*.rev`
Taylor Blau [Thu, 9 Sep 2021 23:24:41 +0000 (19:24 -0400)] 
pack-write.c: rename `.idx` files after `*.rev`

We treat the presence of an `.idx` file as the indicator of whether or
not it's safe to use a packfile. But `finish_tmp_packfile()` (which is
responsible for writing the pack and moving the temporary versions of
all of its auxiliary files into place) is inconsistent about the write
order.

Specifically, it moves the `.rev` file into place after the `.idx`,
leaving open the possibility to open a pack which looks "ready" (because
the `.idx` file exists and is readable) but appears momentarily to not
have a `.rev` file. This causes Git to fall back to generating the
pack's reverse index in memory.

Though racy, this amounts to an unnecessary slow-down at worst, and
doesn't affect the correctness of the resulting reverse index.

Close this race by moving the .rev file into place before moving the
.idx file into place.

This still leaves the issue of `.idx` files being renamed into place
before the auxiliary `.bitmap` file is renamed when in pack-object.c's
write_pack_file() "write_bitmap_index" is true. That race will be
addressed in subsequent commits.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
4 years agopack-write: refactor renaming in finish_tmp_packfile()
Ævar Arnfjörð Bjarmason [Thu, 9 Sep 2021 23:24:37 +0000 (19:24 -0400)] 
pack-write: refactor renaming in finish_tmp_packfile()

Refactor the renaming in finish_tmp_packfile() into a helper function.
The callers are now expected to pass a "name_buffer" ending in
"pack-OID." instead of the previous "pack-", we then append "pack",
"idx" or "rev" to it.

By doing the strbuf_setlen() in rename_tmp_packfile() we reuse the
buffer and avoid the repeated allocations we'd get if that function had
its own temporary "struct strbuf".

This approach of reusing the buffer does make the last user in
pack-object.c's write_pack_file() slightly awkward, since we needlessly
do a strbuf_setlen() before calling strbuf_release() for consistency. In
subsequent changes we'll move that bitmap writing code around, so let's
not skip the strbuf_setlen() now.

The previous strbuf_reset() idiom originated with 5889271114a
(finish_tmp_packfile():use strbuf for pathname construction,
2014-03-03), which in turn was a minimal adjustment of pre-strbuf code
added in 0e990530ae (finish_tmp_packfile(): a helper function,
2011-10-28).

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
4 years agobulk-checkin.c: store checksum directly
Taylor Blau [Thu, 9 Sep 2021 23:24:32 +0000 (19:24 -0400)] 
bulk-checkin.c: store checksum directly

finish_bulk_checkin() stores the checksum from finalize_hashfile() by
writing to the `hash` member of `struct object_id`, but that hash has
nothing to do with an object id (it's just a convenient location that
happens to be sized correctly).

Store the hash directly in an unsigned char array. This behaves the same
as writing to the `hash` member, but makes the intent clearer (and
avoids allocating an extra four bytes for the `algo` member of `struct
object_id`). It likewise prevents the possibility of a segfault when
reading `algo` (e.g., by calling `oid_to_hex()`) if it is uninitialized.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
4 years agot5562: use alarm() to interrupt timed child-wait
Jeff King [Thu, 9 Sep 2021 22:57:57 +0000 (18:57 -0400)] 
t5562: use alarm() to interrupt timed child-wait

The t5562 script occasionally takes 60 extra seconds to complete due to
a race condition in the invoke-with-content-length.pl helper.

The way it's supposed to work is this:

  - we set up a SIGCLD handler

  - we kick off http-backend and write to it with a set content-length,
    but _don't_ close the pipe

  - we sleep for 60 seconds, assuming that SIGCLD from http-backend
    finishing will interrupt us

  - after the sleep finishes (whetherby 60 seconds or because it was
    interrupted by the signal), we check a flag to see if our SIGCLD
    handler was called. If not, then we complain.

This usually completes immediately, because the signal interrupts our
sleep. But very occasionally the child process dies _before_ we hit the
sleep, so we don't realize it. The test still completes successfully
(because our $exited flag is set), but it takes an extra 60 seconds.

There's no way to check the flag and sleep atomically. So the best we
can do with this approach is to sleep in smaller chunks (say, 1 second)
and check the flag incrementally. Then we waste a maximum of 1 second if
we lose the race. This was proposed in:

  https://lore.kernel.org/git/20190218205028.32486-1-max@max630.net/

and it does work. But we can do better.

Instead of blocking on sleep and waiting for the child signal to
interrupt us, we can block on the child exiting and set an alarm signal
to trigger the timeout.

This lets us exit the script immediately when the child behaves (with no
race possible), and wait a maximum of 60 seconds when it doesn't.

Note one small subtlety: perl is very willing to restart the waitpid()
call after the alarm is delivered, even if we've thrown an exception via
die. "perldoc -f alarm" claims you can get around this with an eval/die
combo (and even has some example code), but it doesn't seem to work for
me with waitpid(); instead, we continue waiting until the child exits.

So instead, we'll instruct the child process to exit in the alarm
handler itself. In the original code this was done by calling
close($out). That would continue to work, since our child is always
http-backend, which should exit when its stdin closes. But we can be
even more robust against a hung or confused child by sending a KILL
signal, which should terminate it immediately.

Reported-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
4 years agorefs/files-backend: remove unused open mode parameter
René Scharfe [Thu, 9 Sep 2021 21:45:51 +0000 (23:45 +0200)] 
refs/files-backend: remove unused open mode parameter

We only need to provide a mode if we are willing to let open(2) create
the file, which is not the case here, so drop the unnecessary parameter.

Signed-off-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
4 years agosetup: use xopen and xdup in sanitize_stdfds
René Scharfe [Thu, 9 Sep 2021 21:45:29 +0000 (23:45 +0200)] 
setup: use xopen and xdup in sanitize_stdfds

Replace the catch-all error message with specific ones for opening and
duplicating by calling the wrappers xopen and xdup.  The code becomes
easier to follow when error handling is reduced to two letters.

Remove the unnecessary mode parameter while at it -- we expect /dev/null
to already exist.

Signed-off-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
4 years agopack.h: line-wrap the definition of finish_tmp_packfile()
Ævar Arnfjörð Bjarmason [Thu, 9 Sep 2021 03:24:47 +0000 (23:24 -0400)] 
pack.h: line-wrap the definition of finish_tmp_packfile()

Line-wrap the definition of finish_tmp_packfile() to make subsequent
changes easier to read. See 0e990530ae (finish_tmp_packfile(): a
helper function, 2011-10-28) for the commit that introduced this
overly long line.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>