[PATCH 11/14] revert: Introduce a layer of indirection over pick_commits

[Ramkumar Ramachandra <artagnon@gmail.com>]

Write a new function called process_continuation to prepare a
todo_list to call pick_commits with; the job of pick_commits is
simplified into performing the tasks listed in todo_list.  This will
be useful when continuation functionality like "--continue" is
introduced later in the series.

Helped-by: Jonathan Nieder <jrnider@gmail.com>
Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com>
---
 builtin/revert.c |   36 +++++++++++++++++++++++++-----------
 1 files changed, 25 insertions(+), 11 deletions(-)

diff --git a/builtin/revert.c b/builtin/revert.c
index 7d76f92..8cdcdb6 100644
--- a/builtin/revert.c
+++ b/builtin/revert.c
@@ -677,10 +677,8 @@ static int cleanup_sequencer_data(void)
 	return 0;
 }
 
-static int pick_commits(struct replay_opts *opts)
+static int pick_commits(struct commit_list *todo_list, struct replay_opts *opts)
 {
-	struct commit_list *todo_list = NULL;
-	unsigned char sha1[20];
 	struct commit_list *cur;
 	int res;
 
@@ -690,12 +688,6 @@ static int pick_commits(struct replay_opts *opts)
 				opts->record_origin || opts->edit));
 	read_and_refresh_cache(me, opts);
 
-	walk_revs_populate_todo(&todo_list, opts);
-	create_seq_dir();
-	if (!get_sha1("HEAD", sha1))
-		save_head(sha1_to_hex(sha1));
-	save_todo(todo_list, opts);
-
 	for (cur = todo_list; cur; cur = cur->next) {
 		save_todo(cur, opts);
 		res = do_pick_commit(cur->item, opts);
@@ -710,6 +702,22 @@ static int pick_commits(struct replay_opts *opts)
 	return cleanup_sequencer_data();
 }
 
+static int process_continuation(struct replay_opts *opts)
+{
+	struct commit_list *todo_list = NULL;
+	unsigned char sha1[20];
+
+	read_and_refresh_cache(me, opts);
+
+	walk_revs_populate_todo(&todo_list, opts);
+	create_seq_dir();
+	if (!get_sha1("HEAD", sha1))
+		persist_head(sha1_to_hex(sha1));
+	persist_todo(todo_list, opts);
+
+	return pick_commits(todo_list, opts);
+}
+
 int cmd_revert(int argc, const char **argv, const char *prefix)
 {
 	int res;
@@ -722,7 +730,13 @@ int cmd_revert(int argc, const char **argv, const char *prefix)
 	git_config(git_default_config, NULL);
 	me = "revert";
 	parse_args(argc, argv, &opts);
-	res = pick_commits(&opts);
+
+	/*
+	 * Decide what to do depending on the arguments; a fresh
+	 * cherry-pick should be handled differently from an existing
+	 * one that is being continued
+	 */
+	res = process_continuation(&opts);
 	if (res < 0)
 		die(_("%s failed"), me);
 	return res;
@@ -738,7 +752,7 @@ int cmd_cherry_pick(int argc, const char **argv, const char *prefix)
 	git_config(git_default_config, NULL);
 	me = "cherry-pick";
 	parse_args(argc, argv, &opts);
-	res = pick_commits(&opts);
+	res = process_continuation(&opts);
 	if (res < 0)
 		die(_("%s failed"), me);
 	return res;
-- 
1.7.5.GIT