make --upload-pack option to git-fetch configurable

This introduces the config item remote.<name>.uploadpack to override the
default value (which is "git-upload-pack").

Signed-off-by: Uwe Kleine-König <ukleinek@informatik.uni-freiburg.de>
Signed-off-by: Junio C Hamano <junkio@cox.net>

Documentation/config.txt

@@ -429,9 +429,13 @@ remote.<name>.push::
 	gitlink:git-push[1].
 
 remote.<name>.receivepack::
-	The default program to execute on the remote side when pulling.  See
+	The default program to execute on the remote side when pushing.  See
 	option \--exec of gitlink:git-push[1].
 
+remote.<name>.uploadpack::
+	The default program to execute on the remote side when fetching.  See
+	option \--exec of gitlink:git-fetch-pack[1].
+
 repack.usedeltabaseoffset::
 	Allow gitlink:git-repack[1] to create packs that uses
 	delta-base offset.  Defaults to false.

git-fetch.sh

@@ -85,6 +85,12 @@ case "$#" in
 	set x $origin ; shift ;;
 esac
 
+if test -z "$exec"
+then
+	# No command line override and we have configuration for the remote.
+	exec="--upload-pack=$(get_uploadpack $1)"
+fi
+
 remote_nick="$1"
 remote=$(get_remote_url "$@")
 refs=

git-parse-remote.sh

@@ -279,3 +279,16 @@ resolve_alternates () {
 		esac
 	done
 }
+
+get_uploadpack () {
+	data_source=$(get_data_source "$1")
+	case "$data_source" in
+	config)
+		uplp=$(git-repo-config --get "remote.$1.uploadpack")
+		echo ${uplp:-git-upload-pack}
+		;;
+	*)
+		echo "git-upload-pack"
+		;;
+	esac
+}