[PATCH v3 36/38] sequencer (rebase -i): show the progress

[Johannes Schindelin <johannes.schindelin@xxxxxx>]

The interactive rebase keeps the user informed about its progress.
If the sequencer wants to do the grunt work of the interactive
rebase, it also needs to show that progress.

Signed-off-by: Johannes Schindelin <johannes.schindelin@xxxxxx>
---
 sequencer.c | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/sequencer.c b/sequencer.c
index 4792a3de3b..2c9c555ab6 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -1181,6 +1181,7 @@ struct todo_list {
 	struct strbuf buf;
 	struct todo_item *items;
 	int nr, alloc, current;
+	int done_nr, total_nr;
 };
 
 #define TODO_LIST_INIT { STRBUF_INIT }
@@ -1297,6 +1298,17 @@ static int parse_insn_buffer(char *buf, struct todo_list *todo_list)
 	return res;
 }
 
+static int count_commands(struct todo_list *todo_list)
+{
+	int count = 0, i;
+
+	for (i = 0; i < todo_list->nr; i++)
+		if (todo_list->items[i].command != TODO_COMMENT)
+			count++;
+
+	return count;
+}
+
 static int read_populate_todo(struct todo_list *todo_list,
 			struct replay_opts *opts)
 {
@@ -1339,6 +1351,21 @@ static int read_populate_todo(struct todo_list *todo_list,
 				return error(_("cannot revert during a cherry-pick."));
 	}
 
+	if (is_rebase_i(opts)) {
+		struct todo_list done = TODO_LIST_INIT;
+
+		if (strbuf_read_file(&done.buf, rebase_path_done(), 0) > 0 &&
+				!parse_insn_buffer(done.buf.buf, &done))
+			todo_list->done_nr = count_commands(&done);
+		else
+			todo_list->done_nr = 0;
+
+		todo_list->total_nr = todo_list->done_nr
+			+ count_commands(todo_list);
+
+		todo_list_release(&done);
+	}
+
 	return 0;
 }
 
@@ -1920,6 +1947,11 @@ static int pick_commits(struct todo_list *todo_list, struct replay_opts *opts)
 		if (save_todo(todo_list, opts))
 			return -1;
 		if (is_rebase_i(opts)) {
+			if (item->command != TODO_COMMENT)
+				fprintf(stderr, "Rebasing (%d/%d)%s",
+					++(todo_list->done_nr),
+					todo_list->total_nr,
+					opts->verbose ? "\n" : "\r");
 			unlink(rebase_path_message());
 			unlink(rebase_path_author_script());
 			unlink(rebase_path_stopped_sha());
-- 
2.11.0.rc3.windows.1