47d06bb010
Because it's OK to not have a graph file at all, the graph_verify() function needs to tell the difference between a missing file and a real error. So when loading a traditional graph file, we call open_commit_graph() separately from load_commit_graph_chain_fd_st(), and don't complain if the first one fails with ENOENT. When the function learned about chain files in3da4b609bb(commit-graph: verify chains with --shallow mode, 2019-06-18), we couldn't be as careful, since the only way to load a chain was with read_commit_graph_one(), which did both the open/load as a single unit. So we'll miss errors in chain files we load, thinking instead that there was just no chain file at all. Note that we do still report some of these problems to stderr, as the loading function calls error() and warning(). But we'd exit with a successful exit code, which is wrong. We can fix that by using the recently split open/load functions for chains. That lets us treat the chain file just like a single file with respect to error handling here. An existing test (from3da4b609bb) shows off the problem; we were expecting "commit-graph verify" to report success, but that makes no sense. We did not even verify the contents of the graph data, because we couldn't load it! I don't think this was an intentional exception, but rather just the test covering what happened to occur. Signed-off-by: Jeff King <peff@peff.net> 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 with just "subscribe git" in the body to majordomo@vger.kernel.org (not the Git list). 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