config: do not use strbuf_split()

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 <[email protected]>

Author: gitster

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;
 }