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submodule--helper: refactor "errmsg_str" to be a "struct strbuf"

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Refactor code added in e83e3333b5 (submodule: port submodule
subcommand 'summary' from shell to C, 2020-08-13) so that "errmsg" and
"errmsg_str" are folded into one. The distinction between the empty
string and NULL is something that's tested for by
e.g. "t/t7401-submodule-summary.sh".

This is in preparation for fixing a memory leak the "struct strbuf" in
the pre-image.

Let's also pass a "const char *" to print_submodule_summary(), as it
should not be modifying the "errmsg".

Signed-off-by: Glen Choo <chooglen@google.com>
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Reviewed-by: Glen Choo <chooglen@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Glen Choo 2022-09-01 01:17:59 +02:00 committed by Junio C Hamano
parent a253be682f
commit 9d02f9499f
1 changed files with 6 additions and 8 deletions
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14
builtin/submodule--helper.c
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@ -761,7 +761,7 @@ static char *verify_submodule_committish(const char *sm_path,
return strbuf_detach(&result, NULL);
}
static void print_submodule_summary(struct summary_cb *info, char *errmsg,
static void print_submodule_summary(struct summary_cb *info, const char *errmsg,
int total_commits, const char *displaypath,
const char *src_abbrev, const char *dst_abbrev,
struct module_cb *p)
@ -819,7 +819,7 @@ static void generate_submodule_summary(struct summary_cb *info,
{
char *displaypath, *src_abbrev = NULL, *dst_abbrev;
int missing_src = 0, missing_dst = 0;
char *errmsg = NULL;
struct strbuf errmsg = STRBUF_INIT;
int total_commits = -1;
if (!info->cached && oideq(&p->oid_dst, null_oid())) {
@ -920,23 +920,21 @@ static void generate_submodule_summary(struct summary_cb *info,
* submodule, i.e., deleted or changed to blob
*/
if (S_ISGITLINK(p->mod_dst)) {
struct strbuf errmsg_str = STRBUF_INIT;
if (missing_src && missing_dst) {
strbuf_addf(&errmsg_str, " Warn: %s doesn't contain commits %s and %s\n",
strbuf_addf(&errmsg, " Warn: %s doesn't contain commits %s and %s\n",
displaypath, oid_to_hex(&p->oid_src),
oid_to_hex(&p->oid_dst));
} else {
strbuf_addf(&errmsg_str, " Warn: %s doesn't contain commit %s\n",
strbuf_addf(&errmsg, " Warn: %s doesn't contain commit %s\n",
displaypath, missing_src ?
oid_to_hex(&p->oid_src) :
oid_to_hex(&p->oid_dst));
}
errmsg = strbuf_detach(&errmsg_str, NULL);
}
}
print_submodule_summary(info, errmsg, total_commits,
displaypath, src_abbrev,
print_submodule_summary(info, errmsg.len ? errmsg.buf : NULL,
total_commits, displaypath, src_abbrev,
dst_abbrev, p);
free(displaypath);