[PATCH v2] test-tool run-command: fix flip-flop init pattern

In be5d88e1128 (test-tool run-command: learn to run (parts of) the testsuite, 2019-10-04) an init pattern was added that would use TESTSUITE_INIT, but then promptly memset() everything back to 0. We'd then set the "dup" on the two string lists.

Our setting of "next" to "-1" thus did nothing, we'd reset it to "0" before using it. Let's set it to "0" instead, and trust the "STRING_LIST_INIT_DUP" to set "strdup_strings" appropriately for us.

Note that while we compile this code, there's no in-tree user for the "testsuite" target being modified here anymore, see the discussion at and around <nycvar.QRO.7.76.6.2109091323150.59@tvgsbejvaqbjf.bet>[1].

1. https://lore.kernel.org/git/nycvar.QRO.7.76.6.2109091323150.59@tvgsbejvaqbjf.bet/

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
---
Range-diff against v1:
1:  0aa4523ab6e ! 1:  0ddf38b47ac test-tool run-command: fix confusing init pattern
    @@ Metadata
     Author: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
     
      ## Commit message ##
    -    test-tool run-command: fix confusing init pattern
    +    test-tool run-command: fix flip-flop init pattern
     
         In be5d88e1128 (test-tool run-command: learn to run (parts of) the
         testsuite, 2019-10-04) an init pattern was added that would use
         TESTSUITE_INIT, but then promptly memset() everything back to 0. We'd
    -    then set the "dup" on the two string lists. Our setting of "next" to
    -    "-1" thus did nothing, we'd reset it to "0" before using it.
    +    then set the "dup" on the two string lists.
     
    -    Let's just use the init macro for the STRING_LIST members, we can then
    -    remove the already redundant memset().
    +    Our setting of "next" to "-1" thus did nothing, we'd reset it to "0"
    +    before using it. Let's set it to "0" instead, and trust the
    +    "STRING_LIST_INIT_DUP" to set "strdup_strings" appropriately for us.
     
         Note that while we compile this code, there's no in-tree user for the
         "testsuite" target being modified here anymore, see the discussion at
    @@ Commit message
         Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
     
      ## t/helper/test-run-command.c ##
    -@@ t/helper/test-run-command.c: static int task_finished(int result,
    - }
    - 
    - struct testsuite {
    --	struct string_list tests, failed;
    -+	struct string_list tests;
    -+	struct string_list failed;
    - 	int next;
    +@@ t/helper/test-run-command.c: struct testsuite {
      	int quiet, immediate, verbose, verbose_log, trace, write_junit_xml;
      };
    --#define TESTSUITE_INIT \
    + #define TESTSUITE_INIT \
     -	{ STRING_LIST_INIT_DUP, STRING_LIST_INIT_DUP, -1, 0, 0, 0, 0, 0, 0 }
    -+#define TESTSUITE_INIT { \
    -+	.tests = STRING_LIST_INIT_DUP, \
    -+	.failed = STRING_LIST_INIT_DUP, \
    -+}
    ++	{ STRING_LIST_INIT_DUP, STRING_LIST_INIT_DUP, 0, 0, 0, 0, 0, 0, 0 }
      
      static int next_test(struct child_process *cp, struct strbuf *err, void *cb,
      		     void **task_cb)

 t/helper/test-run-command.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)