Re: [PATCHv9 1/6] submodule-config: keep update strategy around

> Currently submodule.<name>.update is only handled by git-submodule.sh.
> C code will start to need to make use of that value as more of the
> functionality of git-submodule.sh moves into library code in C.
>
> Add the update field to 'struct submodule' and populate it so it can
> be read as sm->update or from sm->update_command.
>
> Signed-off-by: Stefan Beller <sbeller@google.com>
> ---
>  submodule-config.c | 22 ++++++++++++++++++++++
>  submodule-config.h | 11 +++++++++++
>  2 files changed, 33 insertions(+)
>
> diff --git a/submodule-config.c b/submodule-config.c
> index afe0ea8..a1af5de 100644
> --- a/submodule-config.c
> +++ b/submodule-config.c
> @@ -194,6 +194,8 @@ static struct submodule *lookup_or_create_by_name(struct submodule_cache *cache,
>  
>  	submodule->path = NULL;
>  	submodule->url = NULL;
> +	submodule->update = SM_UPDATE_UNSPECIFIED;
> +	submodule->update_command = NULL;
>  	submodule->fetch_recurse = RECURSE_SUBMODULES_NONE;
>  	submodule->ignore = NULL;
>  
> @@ -311,6 +313,26 @@ static int parse_config(const char *var, const char *value, void *data)
>  			free((void *) submodule->url);
>  			submodule->url = xstrdup(value);
>  		}
> +	} else if (!strcmp(item.buf, "update")) {
> +		if (!value)
> +			ret = config_error_nonbool(var);
> +		else if (!me->overwrite &&
> +		    submodule->update != SM_UPDATE_UNSPECIFIED)

> +			warn_multiple_config(me->commit_sha1, submodule->name,
> +					     "update");
> +		else {
> +			submodule->update_command = NULL;
> +			if (!strcmp(value, "none"))
> +				submodule->update = SM_UPDATE_NONE;
> +			else if (!strcmp(value, "checkout"))
> +				submodule->update = SM_UPDATE_CHECKOUT;
> +			else if (!strcmp(value, "rebase"))
> +				submodule->update = SM_UPDATE_REBASE;
> +			else if (!strcmp(value, "merge"))
> +				submodule->update = SM_UPDATE_MERGE;
> +			else if (!skip_prefix(value, "!", &submodule->update_command))
> +				die(_("invalid value for %s"), var);
> +		}
>  	}
>  
>  	strbuf_release(&name);
> diff --git a/submodule-config.h b/submodule-config.h
> index 9061e4e..e3bd56e 100644
> --- a/submodule-config.h
> +++ b/submodule-config.h
> @@ -4,6 +4,15 @@
>  #include "hashmap.h"
>  #include "strbuf.h"
>  
> +enum submodule_update_type {
> +	SM_UPDATE_CHECKOUT,
> +	SM_UPDATE_REBASE,
> +	SM_UPDATE_MERGE,
> +	SM_UPDATE_NONE,
> +	SM_UPDATE_COMMAND,
> +	SM_UPDATE_UNSPECIFIED
> +};
> +
>  /*
>   * Submodule entry containing the information about a certain submodule
>   * in a certain revision.
> @@ -14,6 +23,8 @@ struct submodule {
>  	const char *url;
>  	int fetch_recurse;
>  	const char *ignore;
> +	enum submodule_update_type update;
> +	const char *update_command;
>  	/* the sha1 blob id of the responsible .gitmodules file */
>  	unsigned char gitmodules_sha1[20];
>  };