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The struct commit is used in many contexts. However, members
`generation` and `graph_pos` are only used for commit-graph related
operations and otherwise waste memory.
This wastage would have been more pronounced as we transition to
generation number v2, which uses 64-bit generation number instead of
current 32-bits.
As they are often accessed together, let's introduce struct
commit_graph_data and move them to a commit_graph_data slab.
While the overall test suite runs just as fast as master,
(series: 26m48s, master: 27m34s, faster by 2.87%), certain commands
like `git merge-base --is-ancestor` were slowed by 40% as discovered
by Szeder Gábor [1]. After minimizing commit-slab access, the slow down
persists but is closer to 20%.
Derrick Stolee believes the slow down is attributable to the underlying
algorithm rather than the slowness of commit-slab access [2] and we will
follow-up in a later series.
[1]: https://lore.kernel.org/git/20200607195347.GA8232@szeder.dev/
[2]: https://lore.kernel.org/git/13db757a-9412-7f1e-805c-8a028c4ab2b1@gmail.com/
Signed-off-by: Abhishek Kumar <abhishekkumar8222@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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14ba97f8 (alloc: allow arbitrary repositories for alloc functions,
2018-05-15) introduced parsed_object_pool->commit_count to keep count of
commits per repository and was used to assign commit->index.
However, commit-slab code requires commit->index values to be unique
and a global count would be correct, rather than a per-repo count.
Let's introduce a static counter variable, `parsed_commits_count` to
keep track of parsed commits so far.
As commit_count has no use anymore, let's also drop it from the struct.
Signed-off-by: Abhishek Kumar <abhishekkumar8222@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Preliminary clean-ups around refs API, plus file format
specification documentation for the reftable backend.
* hn/refs-cleanup:
reftable: define version 2 of the spec to accomodate SHA256
reftable: clarify how empty tables should be written
reftable: file format documentation
refs: improve documentation for ref iterator
t: use update-ref and show-ref to reading/writing refs
refs.h: clarify reflog iteration order
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Version appends a hash ID to the file header, making it slightly larger.
This commit also changes "SHA-1" into "object ID" in many places.
Signed-off-by: Han-Wen Nienhuys <hanwen@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The format allows for some ambiguity, as a lone footer also starts
with a valid file header. However, the current JGit code will barf on
this. This commit codifies this behavior into the standard.
Signed-off-by: Han-Wen Nienhuys <hanwen@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Shawn Pearce explains:
Some repositories contain a lot of references (e.g. android at 866k,
rails at 31k). The reftable format provides:
- Near constant time lookup for any single reference, even when the
repository is cold and not in process or kernel cache.
- Near constant time verification if a SHA-1 is referred to by at least
one reference (for allow-tip-sha1-in-want).
- Efficient lookup of an entire namespace, such as `refs/tags/`.
- Support atomic push `O(size_of_update)` operations.
- Combine reflog storage with ref storage.
This file format spec was originally written in July, 2017 by Shawn
Pearce. Some refinements since then were made by Shawn and by Han-Wen
Nienhuys based on experiences implementing and experimenting with the
format. (All of this was in the context of our work at Google and
Google is happy to contribute the result to the Git project.)
Imported from JGit[1]'s current version (c217d33ff,
"Documentation/technical/reftable: improve repo layout", 2020-02-04)
of Documentation/technical/reftable.md and converted to asciidoc by
running
pandoc -t asciidoc -f markdown reftable.md >reftable.txt
using pandoc 2.2.1. The result required the following additional
minor changes:
- removed the [TOC] directive to add a table of contents, since
asciidoc does not support it
- replaced git-scm.com/docs links with linkgit: directives that link
to other pages within Git's documentation
[1] https://eclipse.googlesource.com/jgit/jgit
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Rewrite support for GIT_CURL_VERBOSE in terms of GIT_TRACE_CURL.
Looking good.
* jt/curl-verbose-on-trace-curl:
http, imap-send: stop using CURLOPT_VERBOSE
t5551: test that GIT_TRACE_CURL redacts password
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Code clean-up.
* cc/upload-pack-data:
upload-pack: use upload_pack_data fields in receive_needs()
upload-pack: pass upload_pack_data to create_pack_file()
upload-pack: remove static variable 'stateless_rpc'
upload-pack: pass upload_pack_data to check_non_tip()
upload-pack: pass upload_pack_data to send_ref()
upload-pack: move symref to upload_pack_data
upload-pack: use upload_pack_data writer in receive_needs()
upload-pack: pass upload_pack_data to receive_needs()
upload-pack: pass upload_pack_data to get_common_commits()
upload-pack: use 'struct upload_pack_data' in upload_pack()
upload-pack: move 'struct upload_pack_data' around
upload-pack: move {want,have}_obj to upload_pack_data
upload-pack: remove unused 'wants' from upload_pack_data
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The code to parse "git bisect start" command line was lax in
validating the arguments.
* cb/bisect-helper-parser-fix:
bisect--helper: avoid segfault with bad syntax in `start --term-*`
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"git checkout -p" did not handle a newly added path at all.
* js/checkout-p-new-file:
checkout -p: handle new files correctly
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On-the-wire protocol v2 easily falls into a deadlock between the
remote-curl helper and the fetch-pack process when the server side
prematurely throws an error and disconnects. The communication has
been updated to make it more robust.
* dl/remote-curl-deadlock-fix:
stateless-connect: send response end packet
pkt-line: define PACKET_READ_RESPONSE_END
remote-curl: error on incomplete packet
pkt-line: extern packet_length()
transport: extract common fetch_pack() call
remote-curl: remove label indentation
remote-curl: fix typo
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Code simplification and test coverage enhancement.
* bc/filter-process:
t2060: add a test for switch with --orphan and --discard-changes
builtin/checkout: simplify metadata initialization
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The command line completion script (in contrib/) tried to complete
"git stash -p" as if it were "git stash push -p", but it was too
aggressive and also affected "git stash show -p", which has been
corrected.
* vs/complete-stash-show-p-fix:
completion: don't override given stash subcommand with -p
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The check in "git fsck" to ensure that the tree objects are sorted
still had corner cases it missed unsorted entries.
* rs/fsck-duplicate-names-in-trees:
fsck: detect more in-tree d/f conflicts
t1450: demonstrate undetected in-tree d/f conflict
t1450: increase test coverage of in-tree d/f detection
fsck: fix a typo in a comment
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"git bugreport" learns to report what shell is in use.
* es/bugreport-shell:
bugreport: include user interactive shell
help: add shell-path to --build-options
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Clean-up the commit-graph codepath.
* tb/commit-graph-no-check-oids:
commit-graph: drop COMMIT_GRAPH_WRITE_CHECK_OIDS flag
t5318: reorder test below 'graph_read_expect'
commit-graph.c: simplify 'fill_oids_from_commits'
builtin/commit-graph.c: dereference tags in builtin
builtin/commit-graph.c: extract 'read_one_commit()'
commit-graph.c: peel refs in 'add_ref_to_set'
commit-graph.c: show progress of finding reachable commits
commit-graph.c: extract 'refs_cb_data'
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As FreeBSD is not the only platform whose regexp library reports
a REG_ILLSEQ error when fed invalid UTF-8, add logic to detect that
automatically and skip the affected tests.
* cb/t4210-illseq-auto-detect:
t4210: detect REG_ILLSEQ dynamically and skip affected tests
t/helper: teach test-regex to report pattern errors (like REG_ILLSEQ)
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"git log -L..." now takes advantage of the "which paths are touched
by this commit?" info stored in the commit-graph system.
* ds/line-log-on-bloom:
line-log: integrate with changed-path Bloom filters
line-log: try to use generation number-based topo-ordering
line-log: more responsive, incremental 'git log -L'
t4211-line-log: add tests for parent oids
line-log: remove unused fields from 'struct line_log_data'
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Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Some repositories in the wild have commits that record nonsense
committer timezone (e.g. rails.git); "git fast-import" learned an
option to pass these nonsense timestamps intact to allow recreating
existing repositories as-is.
* en/fast-import-looser-date:
fast-import: add new --date-format=raw-permissive format
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Command line completion (incontrib/) update.
* mt/zsh-completion-optim:
completion: use native ZSH array pattern matching
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The commands in the "diff" family learned to honor "diff.relative"
configuration variable.
* la/diff-relative-config:
diff: add config option relative
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The error message from "git checkout -b foo -t bar baz" was
confusing.
* rs/checkout-b-track-error:
checkout: improve error messages for -b with extra argument
checkout: add tests for -b and --track
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We've adopted a convention that any on-stack structure can be
initialized to have zero values in all fields with "= { 0 }", even
when the first field happens to be a pointer, but sparse complained
that a null pointer should be spelled NULL for a long time. Start
using -Wno-universal-initializer option to squelch it.
* lo/sparse-universal-zero-init:
sparse: allow '{ 0 }' to be used without warnings
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Test fixup.
* cb/t5608-cleanup:
t5608: avoid say() and use "skip_all" instead for consistency
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Docfix.
* jx/pkt-line-doc-count-fix:
doc: fix wrong 4-byte length of pkt-line message
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"feature.experimental" configuration variable is to let volunteers
easily opt into a set of newer features, which use of the v2
transport protocol is now a part of.
* jn/experimental-opts-into-proto-v2:
config: let feature.experimental imply protocol.version=2
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The "--prepare-p4-only" option is supposed to stop after replaying
one changeset, but kept going (by mistake?)
* bk/p4-prepare-p4-only-fix:
git-p4.py: fix --prepare-p4-only error with multiple commits
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Code optimization for a common case.
* an/merge-single-strategy-optim:
merge: optimization to skip evaluate_result for single strategy
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Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Portability fix for tests added recently.
* cb/test-use-ere-for-alternation:
t: avoid alternation (not POSIX) in grep's BRE
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l10n-2.27.0-rnd2
* tag 'l10n-2.27.0-rnd2' of git://github.com/git-l10n/git-po: (23 commits)
l10n: zh_TW.po: v2.27.0 round 2 (0 untranslated)
l10n: zh_TW.po: v2.27.0 round 1 (0 untranslated)
l10n: de.po: Fix typo in the German translation of octopus
l10n: de.po: Update German translation for Git 2.27.0
l10n: it.po: update for Git 2.27.0 round #2
l10n: tr: v2.27.0 round 2
l10n: fr.po v2.27.0 rnd 2
l10n: bg.po: Updated Bulgarian translation (4875t)
l10n: Update Catalan translation
l10n: sv.po: Update Swedish translation (4875t0f0u)
l10n: vi(4875t): Updated Vietnamses translation for 2.27.0rd2
l10n: zh_CN: for git v2.27.0 l10n round 1~2
l10n: git.pot: v2.27.0 round 2 (+1)
l10n: Update Catalan translation
l10n: vi(4874t): Updated Vietnamses translation for 2.27.0
l10n: es: 2.27.0 round 1
l10n: bg.po: Updated Bulgarian translation (4868t)
l10n: fr v2.27.0 rnd 1
l10n: sv.po: Update Swedish translation (4839t0f0u)
l10n: tr: v2.27.0 round 1
...
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There are multiple repositories in the wild with random, invalid
timezones. Most notably is a commit from rails.git with a timezone of
"+051800"[1]. A few searches will find other repos with that same
invalid timezone as well. Further, Peff reports that GitHub relaxed
their fsck checks in August 2011 to accept any timezone value[2], and
there have been multiple reports to filter-repo about fast-import
crashing while trying to import their existing repositories since they
had timezone values such as "-7349423" and "-43455309"[3].
The existing check on timezone values inside fast-import may prove
useful for people who are crafting fast-import input by hand or with a
new script. For them, the check may help them avoid accidentally
recording invalid dates. (Note that this check is rather simplistic and
there are still several forms of invalid dates that fast-import does not
check for: dates in the future, timezone values with minutes that are
not divisible by 15, and timezone values with minutes that are 60 or
greater.) While this simple check may have some value for those users,
other users or tools will want to import existing repositories as-is.
Provide a --date-format=raw-permissive format that will not error out on
these otherwise invalid timezones so that such existing repositories can
be imported.
[1] https://github.com/rails/rails/commit/4cf94979c9f4d6683c9338d694d5eb3106a4e734
[2] https://lore.kernel.org/git/20200521195513.GA1542632@coredump.intra.peff.net/
[3] https://github.com/newren/git-filter-repo/issues/88
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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* 'master' of github.com:ruester/git-po-de:
l10n: de.po: Fix typo in the German translation of octopus
l10n: de.po: Update German translation for Git 2.27.0
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* 'update-italian-translation' of github.com:AlessandroMenti/git-po:
l10n: it.po: update for Git 2.27.0 round #2
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Docfix.
* bc/sha-256-part-1-of-4:
Documentation: correct hash environment variable
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Docfix.
* ma/rev-list-options-docfix:
rev-list-options.txt: start a list for `show-pulls`
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Dev support.
* jk/ci-only-on-selected-branches:
ci/config: correct instruction for CI preferences
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f1e3df3169 (t: increase test coverage of signature verification output,
2020-03-04) adds GPG dependent tests to t4202 and t6200 that were found
problematic with at least OpenBSD 6.7.
Using an escaped '|' for alternations works only in some implementations
of grep (e.g. GNU and busybox).
It is not part of POSIX[1] and not supported by some BSD, macOS, and
possibly other POSIX compatible implementations.
Use `grep -E`, and write it using extended regular expression.
[1] https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap09.html#tag_09_03
Helped-by: Torsten Bögershausen <tboegi@web.de>
Signed-off-by: Carlo Marcelo Arenas Belón <carenas@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Signed-off-by: Yi-Jyun Pan <pan93412@gmail.com>
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Signed-off-by: Yi-Jyun Pan <pan93412@gmail.com>
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Signed-off-by: Jan Engelhardt <jengelh@inai.de>
Signed-off-by: Matthias Rüster <matthias.ruester@gmail.com>
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Reviewed-by: Ralf Thielow <ralf.thielow@gmail.com>
Signed-off-by: Matthias Rüster <matthias.ruester@gmail.com>
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When clearing the builtin operations on re-sourcing in the ZSH case we
can use the native ${parameters} associative array keys values to get
the currently `__gitcomp_builtin_*` operations using pattern matching
instead of using sed.
As also stated in commit 94408dc7, introducing this change the usage of
sed has some overhead implications, while ZSH can do this check just
using its native syntax.
Signed-off-by: Marco Trevisan (Treviño) <mail@3v1n0.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Signed-off-by: Alessandro Menti <alessandro.menti@alessandromenti.it>
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* 'fr_2.27.0rnd2' of github.com:jnavila/git:
l10n: fr.po v2.27.0 rnd 2
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* 'master' of github.com:bitigchi/git-po:
l10n: tr: v2.27.0 round 2
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* 'master' of github.com:alshopov/git-po:
l10n: bg.po: Updated Bulgarian translation (4875t)
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* 'master' of github.com:Softcatala/git-po:
l10n: Update Catalan translation
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Abhishek Kumar
Junio C Hamano
Han-Wen Nienhuys
Jonathan Nieder
Elijah Newren
Jiang Xin
Carlo Marcelo Arenas Belón
Yi-Jyun Pan
Jan Engelhardt
Matthias Rüster
Marco Trevisan (Treviño)
Alessandro Menti