[PATCH] Support --threads arg for git-repack.

[PATCH] Support --threads arg for git-repack.

[Louis Kruger]

This very simple patch adds a --threads argument for git-repack.  It
simply forwards the argument to git-pack-objects.

---
 Documentation/git-repack.txt |   11 +++++++++++
 git-repack.sh                |    3 ++-
 2 files changed, 13 insertions(+), 1 deletions(-)

diff --git a/Documentation/git-repack.txt b/Documentation/git-repack.txt
index 4c1aff6..be52789 100644
--- a/Documentation/git-repack.txt
+++ b/Documentation/git-repack.txt
@@ -10,6 +10,7 @@ SYNOPSIS
 --------
 [verse]
 'git repack' [-a] [-A] [-d] [-f] [-F] [-l] [-n] [-q] [--window=<n>]
[--depth=<n>]
+        [--threads=<n>]

 DESCRIPTION
 -----------
@@ -92,6 +93,16 @@ other objects in that pack they already have locally.
 	to be applied that many times to get to the necessary object.
 	The default value for --window is 10 and --depth is 50.

+--threads=<n>::
+        Specifies the number of threads to spawn when searching for best
+        delta matches. This requires that pack-objects be compiled with
+        pthreads otherwise this option is ignored with a warning. This is
+        meant to reduce packing time on multiprocessor machines. The required
+        amount of memory for the delta search window is however multiplied
+        by the number of threads. Specifying 0 will cause git to auto-detect
+	`--threads=0` makes git auto-detect the number of threads to use,
+        which is the default.
+
 --window-memory=<n>::
 	This option provides an additional limit on top of `--window`;
 	the window size will dynamically scale down so as to not take
diff --git a/git-repack.sh b/git-repack.sh
index 624feec..c8cf5cc 100755
--- a/git-repack.sh
+++ b/git-repack.sh
@@ -20,6 +20,7 @@ window=         size of the window used for delta compression
 window-memory=  same as the above, but limit memory size instead of
entries count
 depth=          limits the maximum delta depth
 max-pack-size=  maximum size of each packfile
+threads=        maximum number of threads
 "
 SUBDIRECTORY_OK='Yes'
 . git-sh-setup
@@ -38,7 +39,7 @@ do
 	-f)	no_reuse=--no-reuse-delta ;;
 	-F)	no_reuse=--no-reuse-object ;;
 	-l)	local=--local ;;
-	--max-pack-size|--window|--window-memory|--depth)
+	--max-pack-size|--window|--window-memory|--depth|--threads)
 		extra="$extra $1=$2"; shift ;;
 	--) shift; break;;
 	*)	usage ;;
-- 
1.7.7.3