update-index: do not die too early in a read-only repository.

diff --git a/Documentation/git-gc.txt b/Documentation/git-gc.txt
index e37758ad15823c81d18ccc06fa4dc8775744cdcd..bc1658434a61bdba41699859f103a3c8e0802d95 100644 (file)
--- a/Documentation/git-gc.txt
+++ b/Documentation/git-gc.txt
@@ -62,6 +62,10 @@ The optional configuration variable 'gc.rerereunresolved' indicates
 how long records of conflicted merge you have not resolved are
 kept.  This defaults to 15 days.
 
+The optional configuration variable 'gc.packrefs' determines if
+`git gc` runs `git-pack-refs`.  Without the configuration, `git-pack-refs`
+is not run in bare repositories by default, to allow older dumb-transport
+clients fetch from the repository,  but this will change in the future.
 
 See Also
 --------