[PATCH 01/11] rebase: factor out checkout for up to date branch

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

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

This code is heavily indented and it will be convenient later in the
series to have it in its own function.

Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
---
 builtin/rebase.c | 33 +++++++++++++++++++--------------
 1 file changed, 19 insertions(+), 14 deletions(-)

diff --git a/builtin/rebase.c b/builtin/rebase.c
index f82bfaed118..f4c312dd8b5 100644
--- a/builtin/rebase.c
+++ b/builtin/rebase.c
@@ -1099,6 +1099,23 @@ static int rebase_config(const char *var, const char *value, void *data)
 	return git_default_config(var, value, data);
 }
 
+static int checkout_up_to_date(struct rebase_options *options)
+{
+	struct strbuf buf = STRBUF_INIT;
+	int ret = 0;
+
+	strbuf_addf(&buf, "%s: checkout %s",
+		    getenv(GIT_REFLOG_ACTION_ENVIRONMENT),
+		    options->switch_to);
+	if (reset_head(the_repository, &options->orig_head, "checkout",
+		       options->head_name, RESET_HEAD_RUN_POST_CHECKOUT_HOOK,
+		       NULL, buf.buf, DEFAULT_REFLOG_ACTION) < 0)
+		ret = error(_("could not switch to %s"), options->switch_to);
+	strbuf_release(&buf);
+
+	return ret;
+}
+
 /*
  * Determines whether the commits in from..to are linear, i.e. contain
  * no merge commits. This function *expects* `from` to be an ancestor of
@@ -1978,21 +1995,9 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
 		if (!(options.flags & REBASE_FORCE)) {
 			/* Lazily switch to the target branch if needed... */
 			if (options.switch_to) {
-				strbuf_reset(&buf);
-				strbuf_addf(&buf, "%s: checkout %s",
-					    getenv(GIT_REFLOG_ACTION_ENVIRONMENT),
-					    options.switch_to);
-				if (reset_head(the_repository,
-					       &options.orig_head, "checkout",
-					       options.head_name,
-					       RESET_HEAD_RUN_POST_CHECKOUT_HOOK,
-					       NULL, buf.buf,
-					       DEFAULT_REFLOG_ACTION) < 0) {
-					ret = error(_("could not switch to "
-							"%s"),
-						      options.switch_to);
+				ret = checkout_up_to_date(&options);
+				if (ret)
 					goto cleanup;
-				}
 			}
 
 			if (!(options.flags & REBASE_NO_QUIET))
-- 
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