[PATCH/RFC 12/20] rebase: reorder validation steps

@@ -793,12 +793,12 @@ else
 	test -z "$onto" &&
 		die "You must specify --onto when using --root"
 fi
+require_clean_work_tree "rebase" "Please commit or stash them."
+
 run_pre_rebase_hook "$UPSTREAM_ARG" "$@"
 
 comment_for_reflog start
 
-require_clean_work_tree "rebase" "Please commit or stash them."
-
 if test ! -z "$1"
 then
 	output git checkout "$1" ||

@@ -417,8 +417,6 @@ esac
 
 test -n "$interactive_rebase" && run_interactive_rebase "$@"
 
-require_clean_work_tree "rebase" "Please commit or stash them."
-
 if test -z "$rebase_root"
 then
 	# The upstream head must be given.  Make sure it is valid.

@@ -460,9 +458,6 @@ case "$onto_name" in
 	;;
 esac
 
-# If a hook exists, give it a chance to interrupt
-run_pre_rebase_hook "$upstream_arg" "$@"
-
 # If the branch to rebase is given, that is the branch we will rebase
 # $branch_name -- branch being rebased, or HEAD (already detached)
 # $orig_head -- commit object name of tip of the branch before rebasing

@@ -500,6 +495,8 @@ case "$#" in
 esac
 orig_head=$branch
 
+require_clean_work_tree "rebase" "Please commit or stash them."
+
 # Now we are rebasing commits $upstream..$branch (or with --root,
 # everything leading up to $branch) on top of $onto
 

@@ -521,6 +518,9 @@ then
 	fi
 fi
 
+# If a hook exists, give it a chance to interrupt
+run_pre_rebase_hook "$upstream_arg" "$@"
+
 # 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"