7d66f21a1b
Tries to shorten the refname to a non-ambiguous name. Szeder Gábor noticed that the git bash completion takes a tremendous amount of time to strip leading components from heads and tags refs (i.e. refs/heads, refs/tags, ...). He proposed a new atom called 'refbasename' which removes at most two leading components from the ref name. I myself, proposed a more dynamic solution, which strips off common leading components with the matched pattern. But the current bash solution and both proposals suffer from one mayor problem: ambiguous refs. A ref is ambiguous, if it resolves to more than one full refs. I.e. given the refs refs/heads/xyzzy and refs/tags/xyzzy. The (short) ref xyzzy can point to both refs. ( Note: Its irrelevant whether the referenced objects are the same or not. ) This proposal solves this by checking for ambiguity of the shorten ref name. The shortening is done with the same rules for resolving refs but in the reverse order. The short name is checked if it resolves to a different ref. To continue the above example, the output would be like this: heads/xyzzy xyzzy So, if you want just tags, xyzzy is not ambiguous, because it will resolve to a tag. If you need the heads you get a also a non-ambiguous short form of the ref. To integrate this new format into the bash completion to get only non-ambiguous refs is beyond the scope of this patch. Signed-off-by: Bert Wesarg <bert.wesarg@googlemail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
//////////////////////////////////////////////////////////////// GIT - the stupid content tracker //////////////////////////////////////////////////////////////// "git" can mean anything, 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 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. It was originally written by Linus Torvalds with help of a group of hackers around the net. It is currently maintained by Junio C Hamano. Please read the file INSTALL for installation instructions. See Documentation/tutorial.txt to get started, then see Documentation/everyday.txt for a useful minimum set of commands, and "man git-commandname" for documentation of each command. CVS users may also want to read Documentation/cvs-migration.txt. Many Git online resources are accessible from http://git.or.cz/ including full documentation and Git related tools. 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. 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 http://marc.theaimsgroup.com/?l=git and other archival sites. The messages titled "A note from the maintainer", "What's in git.git (stable)" and "What's cooking in git.git (topics)" and the discussion following them on the mailing list give a good reference for project status, development direction and remaining tasks.