git-cherry: document limit and add diagram

[thirdparty/git.git] / Documentation / git-daemon.txt

git-daemon(1)
=============

NAME
----
git-daemon - A really simple server for git repositories

SYNOPSIS
--------
[verse]
'git-daemon' [--verbose] [--syslog] [--export-all]
             [--timeout=n] [--init-timeout=n] [--strict-paths]
             [--base-path=path] [--user-path | --user-path=path]
             [--interpolated-path=pathtemplate]
             [--reuseaddr] [--detach] [--pid-file=file]
             [--enable=service] [--disable=service]
	     [--allow-override=service] [--forbid-override=service]
	     [--inetd | [--listen=host_or_ipaddr] [--port=n] [--user=user [--group=group]]
	     [directory...]

DESCRIPTION
-----------
A really simple TCP git daemon that normally listens on port "DEFAULT_GIT_PORT"
aka 9418.  It waits for a connection asking for a service, and will serve
that service if it is enabled.

It verifies that the directory has the magic file "git-daemon-export-ok", and
it will refuse to export any git directory that hasn't explicitly been marked
for export this way (unless the '--export-all' parameter is specified). If you
pass some directory paths as 'git-daemon' arguments, you can further restrict
the offers to a whitelist comprising of those.

By default, only `upload-pack` service is enabled, which serves
`git-fetch-pack` and `git-peek-remote` clients that are invoked
from `git-fetch`, `git-ls-remote`, and `git-clone`.

This is ideally suited for read-only updates, i.e., pulling from
git repositories.

OPTIONS
-------
--strict-paths::
	Match paths exactly (i.e. don't allow "/foo/repo" when the real path is
	"/foo/repo.git" or "/foo/repo/.git") and don't do user-relative paths.
	git-daemon will refuse to start when this option is enabled and no
	whitelist is specified.

--base-path::
	Remap all the path requests as relative to the given path.
	This is sort of "GIT root" - if you run git-daemon with
	'--base-path=/srv/git' on example.com, then if you later try to pull
	'git://example.com/hello.git', `git-daemon` will interpret the path
	as '/srv/git/hello.git'.

--interpolated-path=pathtemplate::
	To support virtual hosting, an interpolated path template can be
	used to dynamically construct alternate paths.  The template
	supports %H for the target hostname as supplied by the client but
	converted to all lowercase, %CH for the canonical hostname,
	%IP for the server's IP address, %P for the port number,
	and %D for the absolute path of the named repository.
	After interpolation, the path is validated against the directory
	whitelist.

--export-all::
	Allow pulling from all directories that look like GIT repositories
	(have the 'objects' and 'refs' subdirectories), even if they
	do not have the 'git-daemon-export-ok' file.

--inetd::
	Have the server run as an inetd service. Implies --syslog.
	Incompatible with --port, --listen, --user and --group options.

--listen=host_or_ipaddr::
	Listen on an a specific IP address or hostname.  IP addresses can
	be either an IPv4 address or an IPV6 address if supported.  If IPv6
	is not supported, then --listen=hostname is also not supported and
	--listen must be given an IPv4 address.
	Incompatible with '--inetd' option.

--port=n::
	Listen on an alternative port.  Incompatible with '--inetd' option.

--init-timeout::
	Timeout between the moment the connection is established and the
	client request is received (typically a rather low value, since
	that should be basically immediate).

--timeout::
	Timeout for specific client sub-requests. This includes the time
	it takes for the server to process the sub-request and time spent
	waiting for next client's request.

--syslog::
	Log to syslog instead of stderr. Note that this option does not imply
	--verbose, thus by default only error conditions will be logged.

--user-path, --user-path=path::
	Allow ~user notation to be used in requests.  When
	specified with no parameter, requests to
	git://host/~alice/foo is taken as a request to access
	'foo' repository in the home directory of user `alice`.
	If `--user-path=path` is specified, the same request is
	taken as a request to access `path/foo` repository in
	the home directory of user `alice`.

--verbose::
	Log details about the incoming connections and requested files.

--reuseaddr::
	Use SO_REUSEADDR when binding the listening socket.
	This allows the server to restart without waiting for
	old connections to time out.

--detach::
	Detach from the shell. Implies --syslog.

--pid-file=file::
	Save the process id in 'file'.

--user=user, --group=group::
	Change daemon's uid and gid before entering the service loop.
	When only `--user` is given without `--group`, the
	primary group ID for the user is used.  The values of
	the option are given to `getpwnam(3)` and `getgrnam(3)`
	and numeric IDs are not supported.
+
Giving these options is an error when used with `--inetd`; use
the facility of inet daemon to achieve the same before spawning
`git-daemon` if needed.

--enable-service, --disable-service::
	Enable/disable the service site-wide per default.  Note
	that a service disabled site-wide can still be enabled
	per repository if it is marked overridable and the
	repository enables the service with an configuration
	item.

--allow-override, --forbid-override::
	Allow/forbid overriding the site-wide default with per
	repository configuration.  By default, all the services
	are overridable.

<directory>::
	A directory to add to the whitelist of allowed directories. Unless
	--strict-paths is specified this will also include subdirectories
	of each named directory.

SERVICES
--------

upload-pack::
	This serves `git-fetch-pack` and `git-peek-remote`
	clients.  It is enabled by default, but a repository can
	disable it by setting `daemon.uploadpack` configuration
	item to `false`.

EXAMPLES
--------
git-daemon as inetd server::
	To set up `git-daemon` as an inetd service that handles any
	repository under the whitelisted set of directories, /pub/foo
	and /pub/bar, place an entry like the following into
	/etc/inetd all on one line:
+
------------------------------------------------
	git stream tcp nowait nobody  /usr/bin/git-daemon
		git-daemon --inetd --verbose --export-all
		/pub/foo /pub/bar
------------------------------------------------


git-daemon as inetd server for virtual hosts::
	To set up `git-daemon` as an inetd service that handles
	repositories for different virtual hosts, `www.example.com`
	and `www.example.org`, place an entry like the following into
	`/etc/inetd` all on one line:
+
------------------------------------------------
	git stream tcp nowait nobody /usr/bin/git-daemon
		git-daemon --inetd --verbose --export-all
		--interpolated-path=/pub/%H%D
		/pub/www.example.org/software
		/pub/www.example.com/software
		/software
------------------------------------------------
+
In this example, the root-level directory `/pub` will contain
a subdirectory for each virtual host name supported.
Further, both hosts advertise repositories simply as
`git://www.example.com/software/repo.git`.  For pre-1.4.0
clients, a symlink from `/software` into the appropriate
default repository could be made as well.


git-daemon as regular daemon for virtual hosts::
	To set up `git-daemon` as a regular, non-inetd service that
	handles repositories for multiple virtual hosts based on
	their IP addresses, start the daemon like this:
+
------------------------------------------------
	git-daemon --verbose --export-all
		--interpolated-path=/pub/%IP/%D
		/pub/192.168.1.200/software
		/pub/10.10.220.23/software
------------------------------------------------
+
In this example, the root-level directory `/pub` will contain
a subdirectory for each virtual host IP address supported.
Repositories can still be accessed by hostname though, assuming
they correspond to these IP addresses.


Author
------
Written by Linus Torvalds <torvalds@osdl.org>, YOSHIFUJI Hideaki
<yoshfuji@linux-ipv6.org> and the git-list <git@vger.kernel.org>

Documentation
--------------
Documentation by Junio C Hamano and the git-list <git@vger.kernel.org>.

GIT
---
Part of the gitlink:git[7] suite