[PATCH 3/3] doc/remote-helpers: document the gitdir feature

[Dmitry Ivankov <divanorama@gmail.com>]

The gitdir capability is recognized by git and can be used to tell
the helper where the .git directory is. But it is not mentioned in
the documentation.

Document the gitdir feature. Upon reading this capability
transport-helper sends out "gitdir path_to_dot_git" command to the
helper. Which looks exactly like sending a command. So let's call
this a command.

Signed-off-by: Dmitry Ivankov <divanorama@gmail.com>
---
 Documentation/git-remote-helpers.txt |   15 +++++++++++++++
 1 files changed, 15 insertions(+), 0 deletions(-)

diff --git a/Documentation/git-remote-helpers.txt b/Documentation/git-remote-helpers.txt
index 58f6ad4..a16a5e5 100644
--- a/Documentation/git-remote-helpers.txt
+++ b/Documentation/git-remote-helpers.txt
@@ -159,6 +159,14 @@ Supported if the helper has the "import" capability.
 +
 Supported if the helper has the "connect" capability.
 
+'gitdir' <path>::
+	Tells helper the location of current repository .git
+	directory. The path is absolute. The command is issued
+	immediately after "gitdir" capability line is read by
+	the caller.
++
+Supported if the helper has the "gitdir" capability.
+
 If a fatal error occurs, the program writes the error message to
 stderr and exits. The caller should expect that a suitable error
 message has been printed if the child closes the connection without
@@ -175,6 +183,7 @@ CAPABILITIES
 'push'::
 'import'::
 'connect'::
+'gitdir'::
 	This helper supports the corresponding command with the same name.
 
 'refspec' 'spec'::
@@ -187,6 +196,12 @@ CAPABILITIES
 	all, it must cover all refs reported by the list command; if
 	it is not used, it is effectively "{asterisk}:{asterisk}"
 
+'gitdir'::
+	The helper wants to know .git directory location. The gitdir
+	command is sent immediately after reading this capability.
+	The helper can read it immediately too or it can proceed with
+	reporting other capabilities and read it as a next command.
+
 REF LIST ATTRIBUTES
 -------------------
 
-- 
1.7.3.4