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submodule: simplify memory handling in config parsing

We keep a strbuf for the name of the submodule, even though
we only ever add one string to it. Let's just use xmemdupz
instead, which is slightly more efficient and makes it
easier to follow what is going on.

Unfortunately, we still end up having to deal with some
memory ownership issues in some code branches, as we have to
allocate the string in order to do a string list lookup, and
then only sometimes want to hand ownership of that string
over to the string_list. Still, making that explicit in the
code (as opposed to sometimes detaching the strbuf, and then
always releasing it) makes it a little more obvious what is
going on.

Signed-off-by: Jeff King <peff@peff.net>
Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Acked-by: Jens Lehmann <Jens.Lehmann@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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1 parent 9edbb8b commit 6bfe19ee168cd47295e9d25b4343ec318fab3790 @peff committed with gitster Jan 23, 2013
Showing with 14 additions and 16 deletions.
  1. +14 −16 submodule.c
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@@ -127,45 +127,43 @@ void gitmodules_config(void)
int parse_submodule_config_option(const char *var, const char *value)
{
struct string_list_item *config;
- struct strbuf submodname = STRBUF_INIT;
const char *name, *key;
int namelen;
if (parse_config_key(var, "submodule", &name, &namelen, &key) < 0 || !name)
return 0;
if (!strcmp(key, "path")) {
- strbuf_add(&submodname, name, namelen);
config = unsorted_string_list_lookup(&config_name_for_path, value);
if (config)
free(config->util);
else
config = string_list_append(&config_name_for_path, xstrdup(value));
- config->util = strbuf_detach(&submodname, NULL);
- strbuf_release(&submodname);
+ config->util = xmemdupz(name, namelen);
} else if (!strcmp(key, "fetchrecursesubmodules")) {
- strbuf_add(&submodname, name, namelen);
- config = unsorted_string_list_lookup(&config_fetch_recurse_submodules_for_name, submodname.buf);
+ char *name_cstr = xmemdupz(name, namelen);
+ config = unsorted_string_list_lookup(&config_fetch_recurse_submodules_for_name, name_cstr);
if (!config)
- config = string_list_append(&config_fetch_recurse_submodules_for_name,
- strbuf_detach(&submodname, NULL));
+ config = string_list_append(&config_fetch_recurse_submodules_for_name, name_cstr);
+ else
+ free(name_cstr);
config->util = (void *)(intptr_t)parse_fetch_recurse_submodules_arg(var, value);
- strbuf_release(&submodname);
} else if (!strcmp(key, "ignore")) {
+ char *name_cstr;
+
if (strcmp(value, "untracked") && strcmp(value, "dirty") &&
strcmp(value, "all") && strcmp(value, "none")) {
warning("Invalid parameter \"%s\" for config option \"submodule.%s.ignore\"", value, var);
return 0;
}
- strbuf_add(&submodname, name, namelen);
- config = unsorted_string_list_lookup(&config_ignore_for_name, submodname.buf);
- if (config)
+ name_cstr = xmemdupz(name, namelen);
+ config = unsorted_string_list_lookup(&config_ignore_for_name, name_cstr);
+ if (config) {
free(config->util);
- else
- config = string_list_append(&config_ignore_for_name,
- strbuf_detach(&submodname, NULL));
- strbuf_release(&submodname);
+ free(name_cstr);
+ } else
+ config = string_list_append(&config_ignore_for_name, name_cstr);
config->util = xstrdup(value);
return 0;
}

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