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Derrick Stolee 6e773527b6 sparse-index: convert from full to sparse If we have a full index, then we can convert it to a sparse index by replacing directories outside of the sparse cone with sparse directory entries. The convert_to_sparse() method does this, when the situation is appropriate. For now, we avoid converting the index to a sparse index if: 1. the index is split. 2. the index is already sparse. 3. sparse-checkout is disabled. 4. sparse-checkout does not use cone mode. Finally, we currently limit the conversion to when the GIT_TEST_SPARSE_INDEX environment variable is enabled. A mode using Git config will be added in a later change. The trickiest thing about this conversion is that we might not be able to mark a directory as a sparse directory just because it is outside the sparse cone. There might be unmerged files within that directory, so we need to look for those. Also, if there is some strange reason why a file is not marked with CE_SKIP_WORKTREE, then we should give up on converting that directory. There is still hope that some of its subdirectories might be able to convert to sparse, so we keep looking deeper. The conversion process is assisted by the cache-tree extension. This is calculated from the full index if it does not already exist. We then abandon the cache-tree as it no longer applies to the newly-sparse index. Thus, this cache-tree will be recalculated in every sparse-full-sparse round-trip until we integrate the cache-tree extension with the sparse index. Some Git commands use the index after writing it. For example, 'git add' will update the index, then write it to disk, then read its entries to report information. To keep the in-memory index in a full state after writing, we re-expand it to a full one after the write. This is wasteful for commands that only write the index and do not read from it again, but that is only the case until we make those commands "sparse aware." We can compare the behavior of the sparse-index in t1092-sparse-checkout-compability.sh by using GIT_TEST_SPARSE_INDEX=1 when operating on the 'sparse-index' repo. We can also compare the two sparse repos directly, such as comparing their indexes (when expanded to full in the case of the 'sparse-index' repo). We also verify that the index is actually populated with sparse directory entries. The 'checkout and reset (mixed)' test is marked for failure when comparing a sparse repo to a full repo, but we can compare the two sparse-checkout cases directly to ensure that we are not changing the behavior when using a sparse index. Signed-off-by: Derrick Stolee <dstolee@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>		2021-03-30 12:57:47 -07:00
.github	…
Documentation	sparse-index: add 'sdir' index extension	2021-03-30 12:57:46 -07:00
block-sha1	…
builtin	sparse-checkout: hold pattern list in index	2021-03-30 12:57:46 -07:00
ci	…
compat	Merge branch 'jk/open-returns-eintr'	2021-03-04 15:34:45 -08:00
contrib	…
ewah	…
git-gui	Merge https://github.com/prati0100/git-gui	2021-03-04 12:38:50 -08:00
gitk-git	…
gitweb	…
mergetools	mergetools/vimdiff: add vimdiff1 merge tool variant	2021-02-23 11:37:13 -08:00
negotiator	…
perl	…
po	…
ppc	…
refs	…
sha1collisiondetection@855827c583	…
sha1dc	…
sha256	…
t	sparse-index: convert from full to sparse	2021-03-30 12:57:47 -07:00
templates	…
trace2	…
vcs-svn	…
xdiff	…
.cirrus.yml	…
.clang-format	…
.editorconfig	…
.gitattributes	…
.gitignore	…
.gitmodules	…
.mailmap	…
.travis.yml	…
.tsan-suppressions	…
CODE_OF_CONDUCT.md	…
COPYING	…
GIT-VERSION-GEN	Git 2.31-rc1	2021-03-02 22:41:13 -08:00
INSTALL	…
LGPL-2.1	…
Makefile	sparse-index: add guard to ensure full index	2021-03-30 12:57:45 -07:00
README.md	…
RelNotes	…
abspath.c	…
aclocal.m4	…
add-interactive.c	…
add-interactive.h	…
add-patch.c	…
advice.c	…
advice.h	…
alias.c	…
alias.h	…
alloc.c	…
alloc.h	…
apply.c	…
apply.h	…
archive-tar.c	…
archive-zip.c	…
archive.c	tree.h API: simplify read_tree_recursive() signature	2021-03-20 16:09:26 -07:00
archive.h	…
attr.c	…
attr.h	…
banned.h	…
base85.c	…
bisect.c	Merge branch 'js/params-vs-args'	2021-02-25 16:43:32 -08:00
bisect.h	…
blame.c	…
blame.h	…
blob.c	…
blob.h	…
bloom.c	…
bloom.h	…
branch.c	…
branch.h	…
builtin.h	…
bulk-checkin.c	…
bulk-checkin.h	…
bundle.c	…
bundle.h	…
cache-tree.c	sparse-index: convert from full to sparse	2021-03-30 12:57:47 -07:00
cache-tree.h	…
cache.h	sparse-index: convert from full to sparse	2021-03-30 12:57:47 -07:00
chdir-notify.c	…
chdir-notify.h	…
check-builtins.sh	…
check_bindir	…
checkout.c	…
checkout.h	…
chunk-format.c	chunk-format: restore duplicate chunk checks	2021-02-18 13:38:16 -08:00
chunk-format.h	chunk-format: create read chunk API	2021-02-18 13:38:16 -08:00
color.c	…
color.h	…
column.c	…
column.h	…
combine-diff.c	…
command-list.txt	…
commit-graph.c	Merge branch 'ds/chunked-file-api'	2021-03-01 14:02:57 -08:00
commit-graph.h	…
commit-reach.c	commit-reach: stale commits may prune generation further	2021-02-22 13:34:34 -08:00
commit-reach.h	…
commit-slab-decl.h	…
commit-slab-impl.h	…
commit-slab.h	…
commit.c	Merge branch 'bc/signed-objects-with-both-hashes'	2021-02-22 16:12:42 -08:00
commit.h	Merge branch 'bc/signed-objects-with-both-hashes'	2021-02-22 16:12:42 -08:00
common-main.c	…
config.c	Merge branch 'ak/config-bad-bool-error'	2021-02-17 17:21:43 -08:00
config.h	…
config.mak.dev	…
config.mak.in	…
config.mak.uname	Merge branch 'jk/open-returns-eintr'	2021-03-04 15:34:45 -08:00
configure.ac	…
connect.c	Merge branch 'jt/clone-unborn-head'	2021-02-17 17:21:40 -08:00
connect.h	…
connected.c	…
connected.h	…
convert.c	…
convert.h	…
copy.c	…
credential.c	…
credential.h	…
csum-file.c	…
csum-file.h	…
ctype.c	…
daemon.c	…
date.c	…
decorate.c	…
decorate.h	…
delta-islands.c	…
delta-islands.h	…
delta.h	…
detect-compiler	…
diff-delta.c	…
diff-lib.c	…
diff-merges.c	…
diff-merges.h	…
diff-no-index.c	…
diff.c	Merge branch 'jc/diffcore-rotate'	2021-02-25 16:43:30 -08:00
diff.h	Merge branch 'jc/diffcore-rotate'	2021-02-25 16:43:30 -08:00
diffcore-break.c	…
diffcore-delta.c	…
diffcore-order.c	…
diffcore-pickaxe.c	…
diffcore-rename.c	diffcore-rename: guide inexact rename detection based on basenames	2021-02-15 18:02:16 -08:00
diffcore-rotate.c	diff: --{rotate,skip}-to=<path>	2021-02-16 09:30:42 -08:00
diffcore.h	diff: --{rotate,skip}-to=<path>	2021-02-16 09:30:42 -08:00
dir-iterator.c	…
dir-iterator.h	…
dir.c	Merge branch 'jh/untracked-cache-fix'	2021-03-01 14:02:58 -08:00
dir.h	…
editor.c	…
entry.c	write_entry(): fix misuses of `path` in error messages	2021-02-16 11:27:17 -08:00
environment.c	…
environment.h	…
exec-cmd.c	…
exec-cmd.h	…
fetch-negotiator.c	…
fetch-negotiator.h	…
fetch-pack.c	Merge branch 'jt/transfer-fsck-across-packs'	2021-03-01 14:02:57 -08:00
fetch-pack.h	…
fmt-merge-msg.c	Merge branch 'bc/signed-objects-with-both-hashes'	2021-02-22 16:12:42 -08:00
fmt-merge-msg.h	…
fsck.c	Merge branch 'jt/transfer-fsck-across-packs'	2021-03-01 14:02:57 -08:00
fsck.h	Merge branch 'jt/transfer-fsck-across-packs'	2021-03-01 14:02:57 -08:00
fsmonitor.c	Merge branch 'jh/fsmonitor-prework'	2021-03-01 14:02:56 -08:00
fsmonitor.h	fsmonitor: log invocation of FSMonitor hook to trace2	2021-02-16 17:14:34 -08:00
fuzz-commit-graph.c	…
fuzz-pack-headers.c	…
fuzz-pack-idx.c	…
generate-cmdlist.sh	…
generate-configlist.sh	…
gettext.c	…
gettext.h	…
git-add--interactive.perl	…
git-archimport.perl	…
git-bisect.sh	…
git-compat-util.h	Merge branch 'jk/open-returns-eintr'	2021-03-04 15:34:45 -08:00
git-cvsexportcommit.perl	…
git-cvsimport.perl	…
git-cvsserver.perl	…
git-difftool--helper.sh	…
git-filter-branch.sh	…
git-instaweb.sh	…
git-merge-octopus.sh	…
git-merge-one-file.sh	…
git-merge-resolve.sh	…
git-mergetool--lib.sh	Merge branch 'sh/mergetool-hideresolved'	2021-02-17 17:21:41 -08:00
git-mergetool.sh	…
git-p4.py	…
git-quiltimport.sh	…
git-rebase--preserve-merges.sh	…
git-request-pull.sh	…
git-send-email.perl	…
git-sh-i18n.sh	…
git-sh-setup.sh	…
git-submodule.sh	…
git-svn.perl	…
git-web--browse.sh	…
git.c	Merge branch 'tb/precompose-prefix-too'	2021-02-12 14:21:04 -08:00
git.rc	…
gpg-interface.c	…
gpg-interface.h	…
graph.c	…
graph.h	…
grep.c	…
grep.h	…
hash-lookup.c	…
hash-lookup.h	…
hash.h	…
hashmap.c	…
hashmap.h	…
help.c	…
help.h	…
hex.c	…
http-backend.c	…
http-fetch.c	http-fetch: allow custom index-pack args	2021-02-22 12:07:40 -08:00
http-push.c	…
http-walker.c	…
http.c	http: allow custom index-pack args	2021-02-22 12:07:40 -08:00
http.h	http: allow custom index-pack args	2021-02-22 12:07:40 -08:00
ident.c	…
imap-send.c	…
iterator.h	…
json-writer.c	…
json-writer.h	…
khash.h	…
kwset.c	…
kwset.h	…
levenshtein.c	…
levenshtein.h	…
line-log.c	…
line-log.h	…
line-range.c	…
line-range.h	…
linear-assignment.c	…
linear-assignment.h	…
list-objects-filter-options.c	…
list-objects-filter-options.h	…
list-objects-filter.c	…
list-objects-filter.h	…
list-objects.c	…
list-objects.h	…
list.h	…
ll-merge.c	…
ll-merge.h	…
lockfile.c	…
lockfile.h	…
log-tree.c	Merge branch 'ab/diff-deferred-free'	2021-02-22 16:12:43 -08:00
log-tree.h	…
ls-refs.c	Merge branch 'jt/clone-unborn-head'	2021-02-17 17:21:40 -08:00
ls-refs.h	…
mailinfo.c	…
mailinfo.h	…
mailmap.c	…
mailmap.h	…
match-trees.c	…
mem-pool.c	…
mem-pool.h	…
merge-blobs.c	…
merge-blobs.h	…
merge-ort-wrappers.c	…
merge-ort-wrappers.h	…
merge-ort.c	merge-ort: call diffcore_rename() directly	2021-02-15 18:02:16 -08:00
merge-ort.h	…
merge-recursive.c	tree.h API: simplify read_tree_recursive() signature	2021-03-20 16:09:26 -07:00
merge-recursive.h	…
merge.c	…
mergesort.c	…
mergesort.h	…
midx.c	Merge branch 'ds/chunked-file-api'	2021-03-01 14:02:57 -08:00
midx.h	…
name-hash.c	…
notes-cache.c	…
notes-cache.h	…
notes-merge.c	…
notes-merge.h	…
notes-utils.c	…
notes-utils.h	…
notes.c	…
notes.h	…
object-file.c	…
object-name.c	…
object-store.h	…
object.c	…
object.h	…
oid-array.c	…
oid-array.h	…
oidmap.c	…
oidmap.h	…
oidset.c	…
oidset.h	…
pack-bitmap-write.c	…
pack-bitmap.c	…
pack-bitmap.h	…
pack-check.c	…
pack-objects.c	…
pack-objects.h	…
pack-revindex.c	…
pack-revindex.h	…
pack-write.c	Merge branch 'jt/transfer-fsck-across-packs'	2021-03-01 14:02:57 -08:00
pack.h	Merge branch 'jt/transfer-fsck-across-packs'	2021-03-01 14:02:57 -08:00
packfile.c	…
packfile.h	…
pager.c	…
parse-options-cb.c	…
parse-options.c	…
parse-options.h	…
patch-delta.c	…
patch-ids.c	…
patch-ids.h	…
path.c	…
path.h	…
pathspec.c	…
pathspec.h	…
pkt-line.c	…
pkt-line.h	…
preload-index.c	preload-index: log the number of lstat calls to trace2	2021-02-16 17:14:34 -08:00
pretty.c	Merge branch 'hv/trailer-formatting'	2021-03-01 14:02:58 -08:00
pretty.h	pretty.c: capture invalid trailer argument	2021-02-15 16:48:38 -08:00
prio-queue.c	…
prio-queue.h	…
progress.c	…
progress.h	…
promisor-remote.c	…
promisor-remote.h	…
prompt.c	…
prompt.h	…
protocol.c	…
protocol.h	…
prune-packed.c	…
prune-packed.h	…
quote.c	…
quote.h	…
range-diff.c	Merge branch 'js/range-diff-one-side-only'	2021-02-17 17:21:41 -08:00
range-diff.h	Merge branch 'js/range-diff-one-side-only'	2021-02-17 17:21:41 -08:00
reachable.c	…
reachable.h	…
read-cache.c	sparse-index: convert from full to sparse	2021-03-30 12:57:47 -07:00
rebase-interactive.c	…
rebase-interactive.h	…
rebase.c	…
rebase.h	…
ref-filter.c	Merge branch 'hv/trailer-formatting'	2021-03-01 14:02:58 -08:00
ref-filter.h	…
reflog-walk.c	…
reflog-walk.h	…
refs.c	…
refs.h	…
refspec.c	…
refspec.h	…
remote-curl.c	…
remote.c	…
remote.h	Merge branch 'jt/clone-unborn-head'	2021-02-17 17:21:40 -08:00
replace-object.c	…
replace-object.h	…
repo-settings.c	sparse-index: add guard to ensure full index	2021-03-30 12:57:45 -07:00
repository.c	sparse-index: add guard to ensure full index	2021-03-30 12:57:45 -07:00
repository.h	sparse-index: add guard to ensure full index	2021-03-30 12:57:45 -07:00
rerere.c	…
rerere.h	…
reset.c	…
reset.h	…
resolve-undo.c	…
resolve-undo.h	…
revision.c	Merge branch 'ak/corrected-commit-date'	2021-02-17 17:21:40 -08:00
revision.h	…
run-command.c	…
run-command.h	…
send-pack.c	…
send-pack.h	…
sequencer.c	…
sequencer.h	…
serve.c	…
serve.h	…
server-info.c	…
setup.c	…
sh-i18n--envsubst.c	…
sha1dc_git.c	…
sha1dc_git.h	…
shallow.c	…
shallow.h	…
shell.c	…
shortlog.h	…
sideband.c	…
sideband.h	…
sigchain.c	…
sigchain.h	…
sparse-index.c	sparse-index: convert from full to sparse	2021-03-30 12:57:47 -07:00
sparse-index.h	sparse-index: convert from full to sparse	2021-03-30 12:57:47 -07:00
split-index.c	…
split-index.h	…
stable-qsort.c	…
strbuf.c	…
strbuf.h	…
streaming.c	…
streaming.h	…
string-list.c	…
string-list.h	…
strmap.c	…
strmap.h	…
strvec.c	…
strvec.h	…
sub-process.c	…
sub-process.h	…
submodule-config.c	…
submodule-config.h	…
submodule.c	…
submodule.h	…
symlinks.c	…
tag.c	…
tag.h	…
tar.h	…
tempfile.c	…
tempfile.h	…
thread-utils.c	…
thread-utils.h	…
tmp-objdir.c	…
tmp-objdir.h	…
trace.c	…
trace.h	…
trace2.c	…
trace2.h	…
trailer.c	…
trailer.h	…
transport-helper.c	…
transport-internal.h	…
transport.c	…
transport.h	…
tree-diff.c	…
tree-walk.c	…
tree-walk.h	…
tree.c	tree.h API: simplify read_tree_recursive() signature	2021-03-20 16:09:26 -07:00
tree.h	tree.h API: simplify read_tree_recursive() signature	2021-03-20 16:09:26 -07:00
unicode-width.h	…
unimplemented.sh	…
unix-socket.c	…
unix-socket.h	…
unpack-trees.c	unpack-trees: ensure full index	2021-03-30 12:57:46 -07:00
unpack-trees.h	…
upload-pack.c	Merge branch 'ak/corrected-commit-date'	2021-02-17 17:21:40 -08:00
upload-pack.h	…
url.c	…
url.h	…
urlmatch.c	…
urlmatch.h	…
usage.c	…
userdiff.c	…
userdiff.h	…
utf8.c	…
utf8.h	…
varint.c	…
varint.h	…
version.c	…
version.h	…
versioncmp.c	…
walker.c	…
walker.h	…
wildmatch.c	…
wildmatch.h	…
worktree.c	…
worktree.h	…
wrap-for-bin.sh	…
wrapper.c	…
write-or-die.c	…
ws.c	…
wt-status.c	…
wt-status.h	…
xdiff-interface.c	…
xdiff-interface.h	…
zlib.c	…

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.txt to get started, then see Documentation/giteveryday.txt for a useful minimum set of commands, and Documentation/git-<commandname>.txt 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.txt (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). To subscribe to the list, send an email with just "subscribe git" in the body to majordomo@vger.kernel.org. The mailing list archives are available at https://lore.kernel.org/git/, http://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