patch, 19 partsnew commands: pull_all and push_all

diff --git a/contrib/subtree/git-subtree.sh b/contrib/subtree/git-subtree.sh
index cb9e288..c3b1208 100755
--- a/contrib/subtree/git-subtree.sh
+++ b/contrib/subtree/git-subtree.sh
@@ -12,6 +12,7 @@ git subtree add   --prefix=<prefix> <commit>
 git subtree add   --prefix=<prefix> <repository> <commit>
 git subtree merge --prefix=<prefix> <commit>
 git subtree pull  --prefix=<prefix> <repository> <refspec...>
+git subtree pull_all
 git subtree push  --prefix=<prefix> <repository> <refspec...>
 git subtree split --prefix=<prefix> <commit...>
 git subtree from-submodule --prefix=<prefix>
@@ -102,16 +103,18 @@ done
 command="$1"
 shift
 case "$command" in
-	add|merge|pull|from-submodule) default= ;;
+	add|merge|pull|from-submodule|pull_all|push_all) default= ;;
 	split|push) default="--default HEAD" ;;
 	*) die "Unknown command '$command'" ;;
 esac

-if [ -z "$prefix" ]; then
+if [ -z "$prefix" -a "$command" != "pull_all" -a "$command" !=
"push_all" ]; then
 	die "You must provide the --prefix option."
 fi

 case "$command" in
+    pull_all);;
+    push_all);;
 	add) [ -e "$prefix" ] &&
 		die "prefix '$prefix' already exists." ;;
 	*)   [ -e "$prefix" ] ||
@@ -120,7 +123,7 @@ esac

 dir="$(dirname "$prefix/.")"

-if [ "$command" != "pull" -a "$command" != "add" -a "$command" !=
"push" ]; then
+if [ "$command" != "pull" -a "$command" != "add" -a "$command" !=
"push" -a "$command" != "pull_all" ]; then
 	revs=$(git rev-parse $default --revs-only "$@") || exit $?
 	dirs="$(git rev-parse --no-revs --no-flags "$@")" || exit $?
 	if [ -n "$dirs" ]; then
@@ -760,4 +763,20 @@ cmd_from-submodule()
 	rm -rf $tmp_repo
 }

+cmd_pull_all()
+{
+    git config -f .gittrees -l | grep subtree | grep path | grep -o
'=.*' | grep -o '[^=].*' |
+        while read path; do
+            git subtree pull -P $path master || exit $?
+        done
+}
+
+cmd_push_all()
+{
+    git config -f .gittrees -l | grep subtree | grep path | grep -o
'=.*' | grep -o '[^=].*' |
+        while read path; do
+            git subtree push -P $path master || exit $?
+        done
+}
+
 "cmd_$command" "$@"