[PATCH v2 1/2] sequencer.c: factor out a function

["Phillip Wood via GitGitGadget" <gitgitgadget@gmail.com>]

From: Phillip Wood <phillip.wood@dunelm.org.uk>

This code is heavily indented and obscures the high level logic within
the loop. Let's move it to its own function before modifying it in the
next commit. Note that there is a subtle change in behavior if the
todo list cannot be reread. Previously todo_list->current was
incremented before returning, now it returns immediately.

Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
---
 sequencer.c | 38 ++++++++++++++++++++++++--------------
 1 file changed, 24 insertions(+), 14 deletions(-)

diff --git a/sequencer.c b/sequencer.c
index 7f07cd00f3f..a248c886c27 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -4254,6 +4254,27 @@ static int stopped_at_head(struct repository *r)
 
 }
 
+static int reread_todo_if_changed(struct repository *r,
+				  struct todo_list *todo_list,
+				  struct replay_opts *opts)
+{
+	struct stat st;
+
+	if (stat(get_todo_path(opts), &st)) {
+		return error_errno(_("could not stat '%s'"),
+				   get_todo_path(opts));
+	} else if (match_stat_data(&todo_list->stat, &st)) {
+		/* Reread the todo file if it has changed. */
+		todo_list_release(todo_list);
+		if (read_populate_todo(r, todo_list, opts))
+			return -1; /* message was printed */
+		/* `current` will be incremented on return */
+		todo_list->current = -1;
+	}
+
+	return 0;
+}
+
 static const char rescheduled_advice[] =
 N_("Could not execute the todo command\n"
 "\n"
@@ -4433,20 +4454,9 @@ static int pick_commits(struct repository *r,
 							item->commit,
 							arg, item->arg_len,
 							opts, res, 0);
-		} else if (is_rebase_i(opts) && check_todo && !res) {
-			struct stat st;
-
-			if (stat(get_todo_path(opts), &st)) {
-				res = error_errno(_("could not stat '%s'"),
-						  get_todo_path(opts));
-			} else if (match_stat_data(&todo_list->stat, &st)) {
-				/* Reread the todo file if it has changed. */
-				todo_list_release(todo_list);
-				if (read_populate_todo(r, todo_list, opts))
-					res = -1; /* message was printed */
-				/* `current` will be incremented below */
-				todo_list->current = -1;
-			}
+		} else if (is_rebase_i(opts) && check_todo && !res &&
+			   reread_todo_if_changed(r, todo_list, opts)) {
+			return -1;
 		}
 
 		todo_list->current++;
-- 
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