git diff --submodule=diff fails with submodules in a submodule

git diff --submodule=diff fails with submodules in a submodule

[David Parrish]

When I try to run `git diff --submodule=diff` in a submodule which has
it's own submodules that have changes I get the error: fatal: bad
object

Let me know if you need an example reproduce the issue.

David

Re: git diff --submodule=diff fails with submodules in a submodule

[Stefan Beller]

+cc Jacob, who implemented --submodule=diff

On Fri, Mar 31, 2017 at 8:40 AM, David Parrish <daveparrish@gmail.com> wrote:
> When I try to run `git diff --submodule=diff` in a submodule which has
> it's own submodules that have changes I get the error: fatal: bad
> object

Thanks for the bug report!

> Let me know if you need an example reproduce the issue.

I could reproduce it when playing around locally with a submodule in
submodules. I think sub-submodule needs to have its HEAD moved from
the recorded commit.

Thanks,
Stefan

Re: git diff --submodule=diff fails with submodules in a submodule

[Jacob Keller]

On Fri, Mar 31, 2017 at 10:07 AM, Stefan Beller <sbeller@google.com> wrote:
> +cc Jacob, who implemented --submodule=diff
>
> On Fri, Mar 31, 2017 at 8:40 AM, David Parrish <daveparrish@gmail.com> wrote:
>> When I try to run `git diff --submodule=diff` in a submodule which has
>> it's own submodules that have changes I get the error: fatal: bad
>> object
>
> Thanks for the bug report!
>
>> Let me know if you need an example reproduce the issue.
>
> I could reproduce it when playing around locally with a submodule in
> submodules. I think sub-submodule needs to have its HEAD moved from
> the recorded commit.
>
> Thanks,
> Stefan

Hmm. An example reproduction would be helpful. Ideally in the form of
a test ;) But otherwise whatever helps. I will try to look at this,
but I'm  busy for a few days.

Thanks,
Jake

[PATCH] failure with diff --submodule=diff with moved nested submodule HEAD

[Stefan Beller]

This fails reliable for me.

Signed-off-by: Stefan Beller <sbeller@google.com>
---
 t/t4060-diff-submodule-option-diff-format.sh | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/t/t4060-diff-submodule-option-diff-format.sh b/t/t4060-diff-submodule-option-diff-format.sh
index 7e23b55ea4..89bced3484 100755
--- a/t/t4060-diff-submodule-option-diff-format.sh
+++ b/t/t4060-diff-submodule-option-diff-format.sh
@@ -746,4 +746,20 @@ test_expect_success 'diff --submodule=diff with .git file' '
 	test_cmp expected actual
 '
 
+test_expect_success 'setup nested submodule' '
+	git submodule add -f ./sm2 &&
+	git commit -a -m "add sm2" &&
+	git -C sm2 submodule add ../sm2 &&
+	git -C sm2 commit -a -m "nested sub"
+'
+
+test_expect_success 'move nested submodule HEAD' '
+	git -C sm2/sm2 commit --allow-empty -m "new HEAD"
+'
+
+test_expect_success 'diff --submodule=diff with moved nested submodule HEAD' '
+	git -C sm2 diff --submodule=diff >actual 2>err &&
+	test_must_be_empty err
+'
+
 test_done
-- 
2.12.2.511.g2abb8caf66

Re: [PATCH] failure with diff --submodule=diff with moved nested submodule HEAD

[Junio C Hamano]

Stefan Beller <sbeller@google.com> writes:

> This fails reliable for me.
>
> Signed-off-by: Stefan Beller <sbeller@google.com>
> ---

I take it that this is a WIP for the testing half of the patch you
are working on (i.e. you are not just throwing a patch to document
known breakage to be fixed later, in which case these would have
been _expect_failure).

Thanks.

>  t/t4060-diff-submodule-option-diff-format.sh | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
>
> diff --git a/t/t4060-diff-submodule-option-diff-format.sh b/t/t4060-diff-submodule-option-diff-format.sh
> index 7e23b55ea4..89bced3484 100755
> --- a/t/t4060-diff-submodule-option-diff-format.sh
> +++ b/t/t4060-diff-submodule-option-diff-format.sh
> @@ -746,4 +746,20 @@ test_expect_success 'diff --submodule=diff with .git file' '
>  	test_cmp expected actual
>  '
>  
> +test_expect_success 'setup nested submodule' '
> +	git submodule add -f ./sm2 &&
> +	git commit -a -m "add sm2" &&
> +	git -C sm2 submodule add ../sm2 &&
> +	git -C sm2 commit -a -m "nested sub"
> +'
> +
> +test_expect_success 'move nested submodule HEAD' '
> +	git -C sm2/sm2 commit --allow-empty -m "new HEAD"
> +'
> +
> +test_expect_success 'diff --submodule=diff with moved nested submodule HEAD' '
> +	git -C sm2 diff --submodule=diff >actual 2>err &&
> +	test_must_be_empty err
> +'
> +
>  test_done