085e2ee0e6
Adding external subcommands to Git is as easy as to put an executable file git-foo into PATH. Packaging such subcommands for a Linux distribution can be achieved by unpacking the executable into /usr/bin of the user's system. Adding system-wide completion scripts for new subcommands, however, can be a bit tricky. Since bash-completion started to use dynamical loading of completion scripts since v1.90 (preview of v2.0), it is no longer sufficient to drop a completion script of a subcommand into the standard completions path, /usr/share/bash-completion/completions, since this script will not be loaded if called as a git subcommand. For example, look at https://bugs.gentoo.org/544722. To give a short summary: The popular git-flow subcommand provides a completion script, which gets installed as /usr/share/bash-completion/completions/git-flow. If you now type into a Bash shell: git flow <TAB> You will not get any completions, because bash-completion only loads completions for git and git has no idea that git-flow is defined in another file. You have to load this script manually or trigger the dynamic loader with: git-flow <TAB> # Please notice the dash instead of whitespace This will not complete anything either, because it only defines a Bash function, without generating completions. But now the correct completion script has been loaded and the first command can use the completions. So, the goal is now to teach the git completion script to consider the possibility of external completion scripts for subcommands, but of course without breaking current workflows. I think the easiest method is to use a function that was defined by bash-completion v1.90, namely _completion_loader. It will take care of loading the correct script if present. Afterwards, the git completion script behaves as usual. _completion_loader was introduced in commit 20c05b43 of bash-completion (https://github.com/scop/bash-completion.git) back in 2011, so it should be available in even older LTS distributions. This function searches for external completion scripts not only in the default path /usr/share/bash-completion/completions, but also in the user's home directory via $XDG_DATA_HOME and in a user specified directory via $BASH_COMPLETION_USER_DIR. The only "drawback" (if it even can be called as such) is, that if _completion_loader does not find a completion script, it automatically registers a minimal function for basic path completion. In practice, however, this will not matter, because in this case the given command is a git command in its dashed form, e.g. 'git-diff-index', and those have been deprecated for a long time. This way we can leverage bash-completion's dynamic loading for git subcommands and make it easier for developers to distribute custom completion scripts. Signed-off-by: Florian Gamböck <mail@floga.de> Acked-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com> |
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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