On Thu, Apr 28, 2016 at 11:28 AM, Stefan Beller <sbeller@xxxxxxxxxx> wrote:
> When there is no .gitmodules file availabe to initialize a submodule
> from, `submodule_from_path` just returns NULL. We need to check for
> that and abort gracefully. When `submodule init` was implemented in shell,
> a missing .gitmodules file would result in an error message
>
> No url found for submodule path '%s' in .gitmodules
>
> While that is technically true, I think we can broaden the error message
> and just say there is no section for the submodule in the .gitmodules file.
Actually I am not so sure any more about this part. In a resend I will use
the old error message again.
This fix is also required for `submodule--helper update-clone`.
>
> Signed-off-by: Stefan Beller <sbeller@xxxxxxxxxx>
> ---
>
> This goes on top of sb/submodule-init (I added the base-commit
> below, just in case anyone uses that feature already. Though I did
> that manually :)
>
> Thanks,
> Stefan
>
> builtin/submodule--helper.c | 10 +++++++---
> t/t7400-submodule-basic.sh | 8 ++++++++
> 2 files changed, 15 insertions(+), 3 deletions(-)
>
> diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c
> index b6d4f27..af5406e 100644
> --- a/builtin/submodule--helper.c
> +++ b/builtin/submodule--helper.c
> @@ -314,13 +314,17 @@ static void init_submodule(const char *path, const char *prefix, int quiet)
> /* Only loads from .gitmodules, no overlay with .git/config */
> gitmodules_config();
>
> - sub = submodule_from_path(null_sha1, path);
> -
> if (prefix) {
> strbuf_addf(&sb, "%s%s", prefix, path);
> displaypath = strbuf_detach(&sb, NULL);
> } else
> - displaypath = xstrdup(sub->path);
> + displaypath = xstrdup(path);
> +
> + sub = submodule_from_path(null_sha1, path);
> +
> + if (!sub)
> + die(_("No section found for submodule path '%s' in .gitmodules"),
> + displaypath);
>
> /*
> * Copy url setting when it is not set yet.
> diff --git a/t/t7400-submodule-basic.sh b/t/t7400-submodule-basic.sh
> index f99f674..f2b3519 100755
> --- a/t/t7400-submodule-basic.sh
> +++ b/t/t7400-submodule-basic.sh
> @@ -18,6 +18,14 @@ test_expect_success 'setup - initial commit' '
> git branch initial
> '
>
> +test_expect_success 'sane abort on missing .gitmodules file' '
> + test_when_finished "git update-index --remove sub" &&
> + git update-index --add --cacheinfo 160000,$(git rev-parse HEAD),sub &&
> + # missing the .gitmodules file here
> + test_must_fail git submodule init 2>actual &&
> + test_i18ngrep "No section found for submodule path" actual
> +'
> +
> test_expect_success 'configuration parsing' '
> test_when_finished "rm -f .gitmodules" &&
> cat >.gitmodules <<-\EOF &&
> --
> 2.8.0.26.g3604242.dirty
>
> base-commit: 3604242f080a813d6f20a7394def422d1e55b30e
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