eaaa127cdf
Before diffing a target blob against a parent, offer the pair's identity to the hunk provider interface. Blame's requests have gone through diff_provider_emit_hunks() since the interface arrived, but carried no identity, so nothing could answer them. Now blame fills in the pair's blob object ids and its diff options, and the chain serves the pair from the store, keyed by the ids and the request's xdiff flags, before the terminal provider falls back to fill-and-compute. Blame diffs at zero context, which is not part of the key. An answer replays the recorded hunks through blame_chunk_cb without loading either blob; a request carrying -I patterns or anchors is outside the key and always computes. Blame withholds the identity where its diff is not the plain blob-pair diff the key describes: reverse blame, ignored revisions, textconv paths, and the working-tree or --contents pseudo-commit, whose blob is not a stored object. Those requests always compute. Whitespace and algorithm options such as -w instead change blame's xdl_opts, so the consult keys a different entry and misses a store warmed without them. Blame's default xdl_opts now come from DIFF_HUNKS_DEFAULT_XDL_OPTS, new here, which records the key-relevant defaults a diff_options-based consumer already carries (today the indent heuristic), so a default blame run and a default "log --stat" warming run share keys by construction. "--show-stats" reports how many pairs the store served and how many consultations it could not, read from diff_hunks_read_stats(); the store counts its own consultations, so blame keeps no tally. Extend t4220 with the blame side: - parity for plain, --porcelain, and --incremental output, and hit and miss accounting across warming runs; - the blame inputs that must bypass or miss the store: -w, indent heuristics, --reverse, textconv, -M/-C, and the --ignore-rev pass; - rename and merge handling, and --contents; - reading a truncated or corrupt store as absent, and a crafted zero-hunk record as a miss that verify flags. Add p4218, measuring the cost of a warming run and the read speedups. Signed-off-by: Michael Montalbo <mmontalbo@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com> |
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| .github | ||
| Documentation | ||
| bin-wrappers | ||
| block-sha1 | ||
| builtin | ||
| ci | ||
| compat | ||
| compiler-tricks | ||
| contrib | ||
| ewah | ||
| git-gui | ||
| gitk-git | ||
| gitweb | ||
| mergetools | ||
| negotiator | ||
| odb | ||
| oss-fuzz | ||
| perl | ||
| po | ||
| refs | ||
| reftable | ||
| sha1 | ||
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| sha1dc | ||
| sha256 | ||
| src | ||
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| t | ||
| templates | ||
| tools | ||
| trace2 | ||
| xdiff | ||
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| .b4-cover-template | ||
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| .gitattributes | ||
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| CODE_OF_CONDUCT.md | ||
| COPYING | ||
| Cargo.toml | ||
| GIT-BUILD-OPTIONS.in | ||
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| INSTALL | ||
| LGPL-2.1 | ||
| Makefile | ||
| README.md | ||
| RelNotes | ||
| SECURITY.md | ||
| abspath.c | ||
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| aclocal.m4 | ||
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| banned.h | ||
| base85.c | ||
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| blob.c | ||
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| bloom.h | ||
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| color.c | ||
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| column.h | ||
| combine-diff.c | ||
| command-list.txt | ||
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| copy.c | ||
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| delta.h | ||
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| diff-no-index.c | ||
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| fetch-object-info.c | ||
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| git-archimport.perl | ||
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| git.c | ||
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| grep.c | ||
| grep.h | ||
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| hash.h | ||
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| hex.h | ||
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| http-backend.c | ||
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| http.h | ||
| ident.c | ||
| ident.h | ||
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| line-range.h | ||
| linear-assignment.c | ||
| linear-assignment.h | ||
| list-objects-filter-options.c | ||
| list-objects-filter-options.h | ||
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| list-objects.c | ||
| list-objects.h | ||
| list.h | ||
| lockfile.c | ||
| lockfile.h | ||
| log-tree.c | ||
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| loose.c | ||
| loose.h | ||
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| mailinfo.c | ||
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| mailmap.c | ||
| mailmap.h | ||
| match-trees.c | ||
| match-trees.h | ||
| mem-pool.c | ||
| mem-pool.h | ||
| merge-blobs.c | ||
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| merge.c | ||
| merge.h | ||
| mergesort.h | ||
| meson.build | ||
| meson_options.txt | ||
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| midx.c | ||
| midx.h | ||
| name-hash.c | ||
| name-hash.h | ||
| notes-cache.c | ||
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| notes-merge.c | ||
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| notes.c | ||
| notes.h | ||
| object-file-convert.c | ||
| object-file-convert.h | ||
| object-file.c | ||
| object-file.h | ||
| object-name.c | ||
| object-name.h | ||
| object.c | ||
| object.h | ||
| odb.c | ||
| odb.h | ||
| oid-array.c | ||
| oid-array.h | ||
| oidmap.c | ||
| oidmap.h | ||
| oidset.c | ||
| oidset.h | ||
| oidtree.c | ||
| oidtree.h | ||
| pack-bitmap-write.c | ||
| pack-bitmap.c | ||
| pack-bitmap.h | ||
| pack-check.c | ||
| pack-mtimes.c | ||
| pack-mtimes.h | ||
| pack-objects.c | ||
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| pack-refs.c | ||
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| pack-revindex.c | ||
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| pack-write.c | ||
| pack.h | ||
| packfile-list.c | ||
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| packfile.c | ||
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| pager.c | ||
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| parallel-checkout.c | ||
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| parse-options.h | ||
| parse.c | ||
| parse.h | ||
| patch-delta.c | ||
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| pretty.c | ||
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| protocol-caps.c | ||
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| prune-packed.c | ||
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| quote.c | ||
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| reachable.c | ||
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| read-cache-ll.h | ||
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| refs.c | ||
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| sh-i18n--envsubst.c | ||
| sha1dc_git.c | ||
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| shallow.c | ||
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| shared.mak | ||
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README.md
Git - fast, scalable, distributed revision control system
Git is a fast, scalable, distributed revision control system with an unusually rich command set that provides both high-level operations and full access to internals.
Git is an Open Source project covered by the GNU General Public License version 2 (some parts of it are under different licenses, compatible with the GPLv2). It was originally written by Linus Torvalds with help of a group of hackers around the net.
Please read the file INSTALL for installation instructions.
Many Git online resources are accessible from https://git-scm.com/ including full documentation and Git related tools.
See Documentation/gittutorial.adoc to get started, then see
Documentation/giteveryday.adoc for a useful minimum set of commands, and
Documentation/git-<commandname>.adoc for documentation of each command.
If git has been correctly installed, then the tutorial can also be
read with man gittutorial or git help tutorial, and the
documentation of each command with man git-<commandname> or git help <commandname>.
CVS users may also want to read Documentation/gitcvs-migration.adoc
(man gitcvs-migration or git help cvs-migration if git is
installed).
The user discussion and development of Git take place on the Git mailing list -- everyone is welcome to post bug reports, feature requests, comments and patches to git@vger.kernel.org (read Documentation/SubmittingPatches for instructions on patch submission and Documentation/CodingGuidelines).
Those wishing to help with error message, usage and informational message
string translations (localization l10) should see po/README.md
(a po file is a Portable Object file that holds the translations).
To subscribe to the list, send an email to git+subscribe@vger.kernel.org (see https://subspace.kernel.org/subscribing.html for details). The mailing list archives are available at https://lore.kernel.org/git/, https://marc.info/?l=git and other archival sites.
Issues which are security relevant should be disclosed privately to the Git Security mailing list git-security@googlegroups.com.
The maintainer frequently sends the "What's cooking" reports that list the current status of various development topics to the mailing list. The discussion following them give a good reference for project status, development direction and remaining tasks.
The name "git" was given by Linus Torvalds when he wrote the very first version. He described the tool as "the stupid content tracker" and the name as (depending on your mood):
- random three-letter combination that is pronounceable, and not actually used by any common UNIX command. The fact that it is a mispronunciation of "get" may or may not be relevant.
- stupid. contemptible and despicable. simple. Take your pick from the dictionary of slang.
- "global information tracker": you're in a good mood, and it actually works for you. Angels sing, and a light suddenly fills the room.
- "goddamn idiotic truckload of sh*t": when it breaks