rebase: factor out call to pre-rebase hook

Remove the call to the pre-rebase hook from
git-rebase--interactive.sh and rely on the call in
git-rebase.sh.

Signed-off-by: Martin von Zweigbergk <martin.von.zweigbergk@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

git-rebase--interactive.sh

@@ -109,18 +109,6 @@ commit_message () {
 	git cat-file commit "$1" | sed "1,/^$/d"
 }
 
-run_pre_rebase_hook () {
-	if test -z "$ok_to_skip_pre_rebase" &&
-	   test -x "$GIT_DIR/hooks/pre-rebase"
-	then
-		"$GIT_DIR/hooks/pre-rebase" ${1+"$@"} || {
-			echo >&2 "The pre-rebase hook refused to rebase."
-			exit 1
-		}
-	fi
-}
-
-
 orig_reflog_action="$GIT_REFLOG_ACTION"
 
 comment_for_reflog () {
@@ -753,8 +741,6 @@ esac
 git var GIT_COMMITTER_IDENT >/dev/null ||
 	die "You need to set your committer info first"
 
-run_pre_rebase_hook "$upstream_arg" "$@"
-
 comment_for_reflog start
 
 if test ! -z "$switch_to"

git-rebase.sh

@@ -184,7 +184,7 @@ run_interactive_rebase () {
 		GIT_EDITOR=:
 		export GIT_EDITOR
 	fi
-	. git-rebase--interactive "$@"
+	. git-rebase--interactive
 }
 
 run_pre_rebase_hook () {
@@ -513,15 +513,15 @@ orig_head=$branch
 
 require_clean_work_tree "rebase" "Please commit or stash them."
 
-test "$type" = interactive && run_interactive_rebase "$@"
-
 # Now we are rebasing commits $upstream..$branch (or with --root,
 # everything leading up to $branch) on top of $onto
 
 # Check if we are already based on $onto with linear history,
-# but this should be done only when upstream and onto are the same.
+# but this should be done only when upstream and onto are the same
+# and if this is not an interactive rebase.
 mb=$(git merge-base "$onto" "$branch")
-if test "$upstream" = "$onto" && test "$mb" = "$onto" &&
+if test "$type" != interactive && test "$upstream" = "$onto" &&
+	test "$mb" = "$onto" &&
 	# linear history?
 	! (git rev-list --parents "$onto".."$branch" | sane_grep " .* ") > /dev/null
 then
@@ -539,6 +539,8 @@ fi
 # If a hook exists, give it a chance to interrupt
 run_pre_rebase_hook "$upstream_arg" "$@"
 
+test "$type" = interactive && run_interactive_rebase
+
 # Detach HEAD and reset the tree
 say "First, rewinding head to replay your work on top of it..."
 git checkout -q "$onto^0" || die "could not detach HEAD"