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builtin/merge: always store allocated strings in pull_twohead

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The `pull_twohead` configuration may sometimes contain an allocated
string, and sometimes it may contain a string constant. Refactor this to
instead always store an allocated string such that we can release its
resources without risk.

While at it, manage the lifetime of other config strings, as well. Note
that we explicitly don't free `cleanup_arg` here. This is because the
variable may be assigned a string constant via command line options.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Patrick Steinhardt 2024-06-07 08:39:35 +02:00 committed by Junio C Hamano
parent fc06676766
commit 71e01a0ebd
1 changed files with 11 additions and 7 deletions
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18
builtin/merge.c
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@ -611,17 +611,19 @@ static int git_merge_config(const char *k, const char *v,
return 0;
}
if (!strcmp(k, "merge.diffstat") || !strcmp(k, "merge.stat"))
if (!strcmp(k, "merge.diffstat") || !strcmp(k, "merge.stat")) {
show_diffstat = git_config_bool(k, v);
else if (!strcmp(k, "merge.verifysignatures"))
} else if (!strcmp(k, "merge.verifysignatures")) {
verify_signatures = git_config_bool(k, v);
else if (!strcmp(k, "pull.twohead"))
} else if (!strcmp(k, "pull.twohead")) {
FREE_AND_NULL(pull_twohead);
return git_config_string(&pull_twohead, k, v);
else if (!strcmp(k, "pull.octopus"))
} else if (!strcmp(k, "pull.octopus")) {
FREE_AND_NULL(pull_octopus);
return git_config_string(&pull_octopus, k, v);
else if (!strcmp(k, "commit.cleanup"))
} else if (!strcmp(k, "commit.cleanup")) {
return git_config_string(&cleanup_arg, k, v);
else if (!strcmp(k, "merge.ff")) {
} else if (!strcmp(k, "merge.ff")) {
int boolval = git_parse_maybe_bool(v);
if (0 <= boolval) {
fast_forward = boolval ? FF_ALLOW : FF_NO;
@ -1294,7 +1296,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
if (!pull_twohead) {
char *default_strategy = getenv("GIT_TEST_MERGE_ALGORITHM");
if (default_strategy && !strcmp(default_strategy, "ort"))
pull_twohead = "ort";
pull_twohead = xstrdup("ort");
}
init_diff_ui_defaults();
@ -1793,6 +1795,8 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
}
strbuf_release(&buf);
free(branch_to_free);
free(pull_twohead);
free(pull_octopus);
discard_index(the_repository->index);
return ret;
}