[PATCH v3 08/12] config: do not use strbuf_split()

From: Junio C Hamano <gitster@pobox.com>
Date: Aug 3, 2025, 06:53 UTC
Message-ID: <20250803065304.3325286-9-gitster@pobox.com>
In-Reply-To: <20250803065304.3325286-1-gitster@pobox.com>

When parsing an old-style GIT_CONFIG_PARAMETERS environment variable, the code parses key=value pairs by splitting them at '=' into an array of strbuf's. As strbuf_split() leaves the delimiter at the end of the split piece, the code has to manually trim it.

If we split with string_list_split(), that becomes unnecessary. Retire the use of strbuf_split() from this code path.

Note that the max parameter of string_list_split() is of an ergonomically iffy design---it specifies the maximum number of times the function is allowed to split, which means that in order to split a text into up to 2 pieces, you have to pass 1, not 2.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 config.c | 23 ++++++++++-------------
 1 file changed, 10 insertions(+), 13 deletions(-)

diff --git a/config.c b/config.c
index 8a2d0b7916..1769f15ee3 100644
--- a/config.c
+++ b/config.c
@@ -638,31 +638,28 @@ int git_config_parse_parameter(const char *text,
 			       config_fn_t fn, void *data)
 {
 	const char *value;
-	struct strbuf **pair;
+	struct string_list pair = STRING_LIST_INIT_DUP;
 	int ret;
 	struct key_value_info kvi = KVI_INIT;
 
 	kvi_from_param(&kvi);
 
-	pair = strbuf_split_str(text, '=', 2);
-	if (!pair[0])
+	string_list_split(&pair, text, "=", 1);
+	if (!pair.nr)
 		return error(_("bogus config parameter: %s"), text);
 
-	if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=') {
-		strbuf_setlen(pair[0], pair[0]->len - 1);
-		value = pair[1] ? pair[1]->buf : "";
-	} else {
+	if (pair.nr == 1)
 		value = NULL;
-	}
+	else
+		value = pair.items[1].string;
 
-	strbuf_trim(pair[0]);
-	if (!pair[0]->len) {
-		strbuf_list_free(pair);
+	if (!*pair.items[0].string) {
+		string_list_clear(&pair, 0);
 		return error(_("bogus config parameter: %s"), text);
 	}
 
-	ret = config_parse_pair(pair[0]->buf, value, &kvi, fn, data);
-	strbuf_list_free(pair);
+	ret = config_parse_pair(pair.items[0].string, value, &kvi, fn, data);
+	string_list_clear(&pair, 0);
 	return ret;
 }

-- 
2.50.1-633-g69dfdd50af