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submodule: fix segmentation fault in submodule--helper clone

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The git submodule--helper clone command will fail with a segmentation
fault when given a null url or null path variable. Since these are
required for proper functioning of the submodule--helper clone
subcommand, add checks to prevent running and fail gracefully when
missing.

Update the usage string to reflect the requirement that the --url and
--path "options" are required.

Signed-off-by: Jacob Keller <jacob.keller@gmail.com>
Reviewed-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jacob Keller 2016-02-29 14:58:33 -08:00 committed by Junio C Hamano
parent 717416ca87
commit 7dad263334
1 changed files with 3 additions and 3 deletions
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6
builtin/submodule--helper.c
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@ -186,15 +186,15 @@ static int module_clone(int argc, const char **argv, const char *prefix)
const char *const git_submodule_helper_usage[] = {
N_("git submodule--helper clone [--prefix=<path>] [--quiet] "
"[--reference <repository>] [--name <name>] [--url <url>]"
"[--depth <depth>] [--path <path>]"),
"[--reference <repository>] [--name <name>] [--depth <depth>] "
"--url <url> --path <path>"),
NULL
};
argc = parse_options(argc, argv, prefix, module_clone_options,
git_submodule_helper_usage, 0);
if (argc)
if (argc || !url || !path)
usage_with_options(git_submodule_helper_usage,
module_clone_options);