Update GIT_TRACE documentation.

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/Documentation/git.txt b/Documentation/git.txt
index 76b41c8..744c38d 100644 (file)
--- a/Documentation/git.txt
+++ b/Documentation/git.txt
@@ -634,9 +634,18 @@ other
        This environment variable overrides `$PAGER`.
 
 'GIT_TRACE'::
-       If this variable is set git will print `trace:` messages on
+       If this variable is set to "1", "2" or "true" (comparison
+       is case insensitive), git will print `trace:` messages on
        stderr telling about alias expansion, built-in command
        execution and external command execution.
+       If this variable is set to an integer value greater than 1
+       and lower than 10 (strictly) then git will interpret this
+       value as an open file descriptor and will try to write the
+       trace messages into this file descriptor.
+       Alternatively, if this variable is set to an absolute path
+       (starting with a '/' character), git will interpret this
+       as a file path and will try to write the trace messages
+       into it.
 
 Discussion[[Discussion]]
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