completion: fix multiple command removals

Commit 6532f3740b ("completion: allow to customize the completable command list", 2018-05-20) tried to allow multiple space-separated entries in completion.commands. To do this, it copies each parsed token into a strbuf so that the result is NUL-terminated. However, for tokens starting with "-", it accidentally passes the original non-terminated string, meaning that only the final one worked. Switch to using the strbuf. Reported-by: Todd Zullinger <tmz@pobox.com> Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>

Jeff King committed Mar 20, 2019 at 14:03 UTC 057ab54b6646fbdabc8c953299f218081ff67456
2 files changed +3 -3
help.c
+2 -2
@@ -386,8 +386,8 @@ void list_cmds_by_config(struct string_list *list)
386 const char *p = strchrnul(cmd_list, ' ');
387
388 strbuf_add(&sb, cmd_list, p - cmd_list);
389 - if (*cmd_list == '-')
390 - string_list_remove(list, cmd_list + 1, 0);
389 + if (sb.buf[0] == '-')
390 + string_list_remove(list, sb.buf + 1, 0);
391 else
392 string_list_insert(list, sb.buf);
393 strbuf_release(&sb);
t/t9902-completion.sh
+1 -1
@@ -1484,7 +1484,7 @@ test_expect_success 'git --help completion' '
1484 test_completion "git --help core" "core-tutorial "
1485 '
1486
1487 -test_expect_failure 'completion.commands removes multiple commands' '
1487 +test_expect_success 'completion.commands removes multiple commands' '
1488 test_config completion.commands "-cherry -mergetool" &&
1489 git --list-cmds=list-mainporcelain,list-complete,config >out &&
1490 ! grep -E "^(cherry|mergetool)$" out