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Jeff King c2ebaa27d6 blame: only coalesce lines that are adjacent in result After blame has finished but before we produce any output, we coalesce groups of lines that were adjacent in the original suspect (which may have been split apart by lines in intermediate commits which went away). However, this can cause incorrect output if the lines are not also adjacent in the result. For instance, the case in t8003 has: ABC DEF which becomes ABC SPLIT DEF Blaming only lines 1 and 3 in the result yields two blame groups (one for each line) that were adjacent in the original. That's enough for us to coalesce them into a single group, but that loses information: our output routines assume they're adjacent in the result as well, and we output: <oid> 1) ABC <oid> 2) SPLIT This is nonsense for two reasons: - we were asked about line 3, not line 2; we should not output the SPLIT line at all - commit <oid> did not touch the SPLIT line at all! We found the correct blame for line 3, but the bug is actually in the output stage, which is showing the wrong line number and content from the final file. We can fix this by only coalescing when both the suspect and result lines are adjacent. That fixes this bug, but keeps coalescing in cases where want it (e.g., the existing test in t8003 where SPLIT goes away, and the lines really are adjacent in the result). Reported-by: Nuthan Munaiah <nm6061@rit.edu> Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>		2020-08-13 10:09:38 -07:00
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blame.c	blame: only coalesce lines that are adjacent in result	2020-08-13 10:09:38 -07:00
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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-<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