[PATCH v3 4/7] notes copy --stdin: split lines with string_list_split()

[Moritz Neeb <lists@moritzneeb.de>]

This patch changes, how the lines are split, when reading them from
stdin to copy the notes. The advantage of string_list_split() over
strbuf_split() is that it removes the terminator, making trimming
of the left part unneccesary.

The strbuf is now rtrimmed before splitting. This is still required
to remove potential CRs. In the next step this will then be done
implicitly by strbuf_readline(). Thus, this is a preparatory refactoring,
towards a trim-free codepath.

Signed-off-by: Moritz Neeb <lists@moritzneeb.de>
---
 builtin/notes.c | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/builtin/notes.c b/builtin/notes.c
index ed6f222..22909c7 100644
--- a/builtin/notes.c
+++ b/builtin/notes.c
@@ -292,18 +292,18 @@ static int notes_copy_from_stdin(int force, const char *rewrite_cmd)
 
 	while (strbuf_getline_lf(&buf, stdin) != EOF) {
 		unsigned char from_obj[20], to_obj[20];
-		struct strbuf **split;
+		struct string_list split = STRING_LIST_INIT_DUP;
 		int err;
 
-		split = strbuf_split(&buf, ' ');
-		if (!split[0] || !split[1])
+		strbuf_rtrim(&buf);
+		string_list_split(&split, buf.buf, ' ', -1);
+
+		if (split.nr != 2)
 			die(_("Malformed input line: '%s'."), buf.buf);
-		strbuf_rtrim(split[0]);
-		strbuf_rtrim(split[1]);
-		if (get_sha1(split[0]->buf, from_obj))
-			die(_("Failed to resolve '%s' as a valid ref."), split[0]->buf);
-		if (get_sha1(split[1]->buf, to_obj))
-			die(_("Failed to resolve '%s' as a valid ref."), split[1]->buf);
+		if (get_sha1(split.items[0].string, from_obj))
+			die(_("Failed to resolve '%s' as a valid ref."), split.items[0].string);
+		if (get_sha1(split.items[1].string, to_obj))
+			die(_("Failed to resolve '%s' as a valid ref."), split.items[1].string);
 
 		if (rewrite_cmd)
 			err = copy_note_for_rewrite(c, from_obj, to_obj);
@@ -313,11 +313,11 @@ static int notes_copy_from_stdin(int force, const char *rewrite_cmd)
 
 		if (err) {
 			error(_("Failed to copy notes from '%s' to '%s'"),
-			      split[0]->buf, split[1]->buf);
+			      split.items[0].string, split.items[1].string);
 			ret = 1;
 		}
 
-		strbuf_list_free(split);
+		string_list_clear(&split, 0);
 	}
 
 	if (!rewrite_cmd) {
-- 
2.4.3