c3d034df16
The hashfile API is used to write out a "hashfile", which has a final checksum (typically SHA-1) at the end. An in-core hashfile structure has up to two file descriptors and a few buffers that can only be freed by calling a helper function that is private to the csum-file implementation. The usual flow of a user of the API is to first open a file descriptor for writing, obtain a hashfile associated with that write file descriptor by calling either hashfd() or hashfd_check(), call hashwrite() number of times to write data to the file, and then call finalize_hashfile(), which appends th checksum to the end of the file, closes file descriptors and releases associated buffers. But what if a caller finds some error after calling hashfd() to start the process and/or hashwrite() to send some data to the file, and wants to abort the operation? The underlying file descriptor is often managed by the tempfile API, so aborting will clean the file out of the filesystem, but the resources associated with the in-core hashfile structure is lost. Introduce discard_hashfile() API function to allow them to release the resources held by a hashfile structure the callers want to dispose of, and use that in read-cache.c:do_write_index(), which is a central place that writes the index file. Mark t2107 as leak-free, as this leak in "update-index --cacheinfo" test that deliberately makes it fail is now plugged. Signed-off-by: Junio C Hamano <gitster@pobox.com>
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 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