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Thomas Gummerer a125a22334 read-cache: fix reading the shared index for other repos read_index_from() takes a path argument for the location of the index file. For reading the shared index in split index mode however it just ignores that path argument, and reads it from the gitdir of the current repository. This works as long as an index in the_repository is read. Once that changes, such as when we read the index of a submodule, or of a different working tree than the current one, the gitdir of the_repository will no longer contain the appropriate shared index, and git will fail to read it. For example t3007-ls-files-recurse-submodules.sh was broken with GIT_TEST_SPLIT_INDEX set in 188dce131f ("ls-files: use repository object", 2017-06-22), and t7814-grep-recurse-submodules.sh was also broken in a similar manner, probably by introducing struct repository there, although I didn't track down the exact commit for that. be489d02d2 ("revision.c: --indexed-objects add objects from all worktrees", 2017-08-23) breaks with split index mode in a similar manner, not erroring out when it can't read the index, but instead carrying on with pruning, without taking the index of the worktree into account. Fix this by passing an additional gitdir parameter to read_index_from, to indicate where it should look for and read the shared index from. read_cache_from() defaults to using the gitdir of the_repository. As it is mostly a convenience macro, having to pass get_git_dir() for every call seems overkill, and if necessary users can have more control by using read_index_from(). Helped-by: Brandon Williams <bmwill@google.com> Signed-off-by: Thomas Gummerer <t.gummerer@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>		2018-01-19 10:36:34 -08:00
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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.txt to get started, then see Documentation/giteveryday.txt for a useful minimum set of commands, and Documentation/git-.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://public-inbox.org/git/, http://marc.info/?l=git and other archival sites.

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