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By default, we tell curl to use CURLAUTH_ANY, which does not limit its set of auth methods. However, this results in an extra round-trip to the server when authentication is required. After we've fed the credential to curl, it wants to probe the server to find its list of available methods before sending an Authorization header. We can shortcut this by limiting our http_auth_methods by what the server told us it supports. In some cases (such as when the server only supports Basic), that lets curl skip the extra probe request. The end result should look the same to the user, but you can use GIT_TRACE_CURL to verify the sequence of requests: GIT_TRACE_CURL=1 \ git ls-remote https://example.com/repo.git \ 2>&1 >/dev/null | egrep '(Send|Recv) header: (GET|HTTP|Auth)' Before this patch, hitting a Basic-only server like github.com results in: Send header: GET /repo.git/info/refs?service=git-upload-pack HTTP/1.1 Recv header: HTTP/1.1 401 Authorization Required Send header: GET /repo.git/info/refs?service=git-upload-pack HTTP/1.1 Recv header: HTTP/1.1 401 Authorization Required Send header: GET /repo.git/info/refs?service=git-upload-pack HTTP/1.1 Send header: Authorization: Basic <redacted> Recv header: HTTP/1.1 200 OK And after: Send header: GET /repo.git/info/refs?service=git-upload-pack HTTP/1.1 Recv header: HTTP/1.1 401 Authorization Required Send header: GET /repo.git/info/refs?service=git-upload-pack HTTP/1.1 Send header: Authorization: Basic <redacted> Recv header: HTTP/1.1 200 OK The possible downsides are: - This only helps for a Basic-only server; for a server with multiple auth options, curl may still send a probe request to see which ones are available (IOW, there's no way to say "don't probe, I already know what the server will say"). - The http_auth_methods variable is global, so this will apply to all further requests. That's acceptable for Git's usage of curl, though, which also treats the credentials as global. I.e., in any given program invocation we hit only one conceptual server (we may be redirected at the outset, but in that case that's whose auth_avail field we'd see). 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 http://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