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submodule--helper update-clone: abort gracefully on missing .gitmodules

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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 `git submodule update` was implemented in shell, this error out
with the warning

    Submodule path '%s' not initialized
    Maybe you want to use 'update --init'?

Replicate that behavior for now instead of crashing.

Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Stefan Beller 2016-04-28 13:02:46 -07:00 committed by Junio C Hamano
parent d92028a575
commit 08fdbdb153
2 changed files with 33 additions and 13 deletions
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38
builtin/submodule--helper.c
View file

@ -593,6 +593,25 @@ struct submodule_update_clone {
SUBMODULE_UPDATE_STRATEGY_INIT, 0, NULL, NULL, NULL, NULL, \
STRING_LIST_INIT_DUP, 0}
static void next_submodule_warn_missing(struct submodule_update_clone *suc,
struct strbuf *out, const char *displaypath)
{
/*
* Only mention uninitialized submodules when their
* paths have been specified.
*/
if (suc->warn_if_uninitialized) {
strbuf_addf(out,
_("Submodule path '%s' not initialized"),
displaypath);
strbuf_addch(out, '\n');
strbuf_addstr(out,
_("Maybe you want to use 'update --init'?"));
strbuf_addch(out, '\n');
}
}
/**
* Determine whether 'ce' needs to be cloned. If so, prepare the 'child' to
* run the clone. Returns 1 if 'ce' needs to be cloned, 0 otherwise.
@ -627,6 +646,11 @@ static int prepare_to_clone_next_submodule(const struct cache_entry *ce,
else
displaypath = ce->name;
if (!sub) {
next_submodule_warn_missing(suc, out, displaypath);
goto cleanup;
}
if (suc->update.type == SM_UPDATE_NONE
|| (suc->update.type == SM_UPDATE_UNSPECIFIED
&& sub->update_strategy.type == SM_UPDATE_NONE)) {
@ -644,19 +668,7 @@ static int prepare_to_clone_next_submodule(const struct cache_entry *ce,
strbuf_addf(&sb, "submodule.%s.url", sub->name);
git_config_get_string(sb.buf, &url);
if (!url) {
/*
* Only mention uninitialized submodules when their
* path have been specified
*/
if (suc->warn_if_uninitialized) {
strbuf_addf(out,
_("Submodule path '%s' not initialized"),
displaypath);
strbuf_addch(out, '\n');
strbuf_addstr(out,
_("Maybe you want to use 'update --init'?"));
strbuf_addch(out, '\n');
}
next_submodule_warn_missing(suc, out, displaypath);
goto cleanup;
}

8
t/t7400-submodule-basic.sh
View file

@ -26,6 +26,14 @@ test_expect_success 'submodule init aborts on missing .gitmodules file' '
test_i18ngrep "No url found for submodule path" actual
'
test_expect_success 'submodule update aborts 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
git submodule update sub 2>actual &&
test_i18ngrep "Submodule path .sub. not initialized" actual
'
test_expect_success 'configuration parsing' '
test_when_finished "rm -f .gitmodules" &&
cat >.gitmodules <<-\EOF &&