[PATCH v2 06/11] notes: do not use strbuf_split*()

[Junio C Hamano <gitster@pobox.com>]

When reading copy instructions from the standard input, the program
reads a line, splits it into tokens at whitespace, and trims each of
the tokens before using.  We no longer need to use strbuf just to be
able to trim, as string_list_split*() family now can trim while
splitting a string.

Retire the use of strbuf_split() from this code path.

Note that this loop is a bit sloppy in that it ensures at least
there are two tokens on each line, but ignores if there are extra
tokens on the line.  Tightening it is outside the scope of this
series.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 builtin/notes.c | 23 ++++++++++++-----------
 1 file changed, 12 insertions(+), 11 deletions(-)

diff --git a/builtin/notes.c b/builtin/notes.c
index a9529b1696..4fb36a743c 100644
--- a/builtin/notes.c
+++ b/builtin/notes.c
@@ -375,18 +375,19 @@ static int notes_copy_from_stdin(int force, const char *rewrite_cmd)
 
 	while (strbuf_getline_lf(&buf, stdin) != EOF) {
 		struct object_id from_obj, to_obj;
-		struct strbuf **split;
+		struct string_list split = STRING_LIST_INIT_NODUP;
 		int err;
 
-		split = strbuf_split(&buf, ' ');
-		if (!split[0] || !split[1])
+		string_list_split_in_place_f(&split, buf.buf, " ", -1,
+					     STRING_LIST_SPLIT_TRIM);
+		if (split.nr < 2)
 			die(_("malformed input line: '%s'."), buf.buf);
-		strbuf_rtrim(split[0]);
-		strbuf_rtrim(split[1]);
-		if (repo_get_oid(the_repository, split[0]->buf, &from_obj))
-			die(_("failed to resolve '%s' as a valid ref."), split[0]->buf);
-		if (repo_get_oid(the_repository, split[1]->buf, &to_obj))
-			die(_("failed to resolve '%s' as a valid ref."), split[1]->buf);
+		if (repo_get_oid(the_repository, split.items[0].string, &from_obj))
+			die(_("failed to resolve '%s' as a valid ref."),
+			    split.items[0].string);
+		if (repo_get_oid(the_repository, 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);
@@ -396,11 +397,11 @@ 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) {
-- 
2.50.1-618-g45d530d26b