[PATCH] Add commands that git-gc runs underneath

[Jari Aalto <jari.aalto@cante.net>]

git-gc is a higher level utility to "do the right thing". However
there are many other lower level utilities for the house keeping and
it is not clear what git-gc actually does. Adding the actual lower
level command and their parameters explain "what's going on".x

Signed-off-by: Jari Aalto <jari.aalto@cante.net>
---
 Documentation/git-gc.txt |   18 ++++++++++++++++++
 1 files changed, 18 insertions(+), 0 deletions(-)

diff --git a/Documentation/git-gc.txt b/Documentation/git-gc.txt
index c7742ca..c2315bf 100644
--- a/Documentation/git-gc.txt
+++ b/Documentation/git-gc.txt
@@ -21,6 +21,24 @@ Users are encouraged to run this task on a regular basis within
 each repository to maintain good disk space utilization and good
 operating performance.
 
+`git-gc` is a front-end to lower level house keeping commands and
+effectively runs these:
+
+--------------------------------
+ # for non-bare repositories only
+ git pack-refs --all --prune
+
+ git reflog expire --all
+
+ # with added --window -f parameters if --aggressive was specified
+ git repack -a -d -l
+
+ # if --prune was specified
+ git prune
+
+ git rerere gc
+--------------------------------
+
 OPTIONS
 -------
 
-- 
1.5.3.rc5



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