Subject: Re: [PATCH v4 1/3] fetch/pull: Add the --recurse-submodules option

From: Jens Lehmann <[email-masked]>
Date: Fri, 10 Dec 2010 00:07:50 +0100

Am 09.12.2010 22:16, schrieb Junio C Hamano:
> Jens Lehmann <[email-masked]> writes:
> 
>> Until now you had to call "git submodule update" (without -N|--no-fetch
>> option) or something like "git submodule foreach git fetch" to fetch
>> new commits in populated submodules from their remote.
>> ...
>> diff --git a/builtin/fetch.c b/builtin/fetch.c
>> index d35f000..db3fba3 100644
>> --- a/builtin/fetch.c
>> +++ b/builtin/fetch.c
>> ...
>> @@ -784,28 +790,36 @@ static int add_remote_or_group(const char *name, struct string_list *list)
>>  	return 1;
>>  }
>>
>> -static int fetch_multiple(struct string_list *list)
>> +static void add_options_to_argv(int *argc, const char **argv)
>>  {
>> -	int i, result = 0;
>> -	const char *argv[11] = { "fetch", "--append" };
>> -...
>> +static int fetch_multiple(struct string_list *list)
>> +{
>> +	int i, result = 0;
>> +	const char *argv[12] = { "fetch", "--append" };
> 
> This used to be 11; are we adding something new?  Ahh, possibly
> "--recurse_submodules".

Yup, that's why! (see a few lines down between "--keep" and "-v").

>> diff --git a/submodule.c b/submodule.c
>> index 91a4758..4d9b774 100644
>> --- a/submodule.c
>> +++ b/submodule.c
>> @@ -63,7 +63,7 @@ void set_diffopt_flags_from_submodule_config(struct diff_options *diffopt,
>>  	}
>>  }
>>
>> -static int submodule_config(const char *var, const char *value, void *cb)
>> +int submodule_config(const char *var, const char *value, void *cb)
>>  {
>>  	if (!prefixcmp(var, "submodule."))
>>  		return parse_submodule_config_option(var, value);
>> @@ -229,6 +229,70 @@ void show_submodule_summary(FILE *f, const char *path,
>>  	strbuf_release(&sb);
>>  }
>>
>> +int fetch_populated_submodules(int num_options, const char **options,
>> +			       const char *prefix, int quiet)
>> +{
>> +	int i, result = 0, argc = 0;
>> +	struct child_process cp;
>> +	const char **argv;
>> +	struct string_list_item *name_for_path;
>> +	const char *work_tree = get_git_work_tree();
>> +	if (!work_tree)
>> +		return 0;
>> +
>> +	if (!the_index.initialized)
>> +		if (read_cache() < 0)
>> +			die("index file corrupt");
>> +
>> +	argv = xcalloc(num_options + 5, sizeof(const char *));
> 
> Where is this '5' coming from?  "fetch" "--submodule-prefix", the prefix,
> and the terminating NULL?  What did I miss?

No, you didn't miss anything but I have been off by one ... '4' is
sufficient here.