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submodule API: don't handle SM_..{UNSPECIFIED,COMMAND} in to_string()

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Change the submodule_strategy_to_string() function added in
3604242f08 (submodule: port init from shell to C, 2016-04-15) to
really return a "const char *". In the "SM_UPDATE_COMMAND" case it
would return a strbuf_detach().

Furthermore, this function would return NULL on SM_UPDATE_UNSPECIFIED,
so it wasn't safe to xstrdup() its return value in the general case,
or to use it in a sprintf() format as the code removed in the
preceding commit did.

But its callers would never call it with either SM_UPDATE_UNSPECIFIED
or SM_UPDATE_COMMAND. Let's have its behavior reflect how its only
user expects it to behave, and BUG() out on the rest.

By doing this we can also stop needlessly xstrdup()-ing and free()-ing
the memory for the config we're setting. We can instead always use
constant strings. We can also use the *_tmp() variant of
git_config_get_string().

Let's also rename this submodule_strategy_to_string() function to
submodule_update_type_to_string(). Now that it's only tasked with
returning a string version of the "enum submodule_update_type type".
Before it would look at the "command" field in "struct
submodule_update_strategy".

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:
Ævar Arnfjörð Bjarmason
2022-09-01 01:18:05 +02:00
committed by Junio C Hamano
parent 08c2e778d6
commit b9dd63ffe2
3 changed files with 11 additions and 13 deletions
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12
submodule.c
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@ -415,10 +415,9 @@ int parse_submodule_update_strategy(const char *value,
return 0;
}
const char *submodule_strategy_to_string(const struct submodule_update_strategy *s)
const char *submodule_update_type_to_string(enum submodule_update_type type)
{
struct strbuf sb = STRBUF_INIT;
switch (s->type) {
switch (type) {
case SM_UPDATE_CHECKOUT:
return "checkout";
case SM_UPDATE_MERGE:
@ -428,12 +427,11 @@ const char *submodule_strategy_to_string(const struct submodule_update_strategy
case SM_UPDATE_NONE:
return "none";
case SM_UPDATE_UNSPECIFIED:
return NULL;
case SM_UPDATE_COMMAND:
strbuf_addf(&sb, "!%s", s->command);
return strbuf_detach(&sb, NULL);
BUG("init_submodule() should handle type %d", type);
default:
BUG("unexpected update strategy type: %d", type);
}
return NULL;
}
void handle_ignore_submodules_arg(struct diff_options *diffopt,