Re: [BUG] `git reset --hard` fails with `update = none` submodules

[Rose Kunkel <rose@rosekunkel.me>]

Running `git status` in the resulting repository gives
```
On branch master
Your branch is up to date with 'origin/master'.

nothing to commit, working tree clean
```

This is the output from the clone command:
```
Cloning into 'tree-sitter-langs'...
remote: Enumerating objects: 609, done.
remote: Counting objects: 100% (83/83), done.
remote: Compressing objects: 100% (52/52), done.
remote: Total 609 (delta 40), reused 58 (delta 24), pack-reused 526
Receiving objects: 100% (609/609), 117.17 KiB | 1.05 MiB/s, done.
Resolving deltas: 100% (322/322), done.
Submodule 'repos/agda'
(https://github.com/tree-sitter/tree-sitter-agda) registered for path
'repos/agda'
Submodule 'repos/bash'
(https://github.com/tree-sitter/tree-sitter-bash) registered for path
'repos/bash'
Submodule 'repos/c' (https://github.com/tree-sitter/tree-sitter-c)
registered for path 'repos/c'
Submodule 'repos/c-sharp'
(https://github.com/tree-sitter/tree-sitter-c-sharp) registered for
path 'repos/c-sharp'
Submodule 'repos/cpp' (https://github.com/tree-sitter/tree-sitter-cpp)
registered for path 'repos/cpp'
Submodule 'repos/css' (https://github.com/tree-sitter/tree-sitter-css)
registered for path 'repos/css'
Submodule 'repos/elm' (https://github.com/razzeee/tree-sitter-elm)
registered for path 'repos/elm'
Submodule 'repos/fluent'
(https://github.com/tree-sitter/tree-sitter-fluent) registered for
path 'repos/fluent'
Submodule 'repos/go' (https://github.com/tree-sitter/tree-sitter-go)
registered for path 'repos/go'
Submodule 'repos/html'
(https://github.com/tree-sitter/tree-sitter-html) registered for path
'repos/html'
Submodule 'repos/janet-simple'
(https://codeberg.org/sogaiu/tree-sitter-janet-simple) registered for
path 'repos/janet-simple'
Submodule 'repos/java'
(https://github.com/tree-sitter/tree-sitter-java) registered for path
'repos/java'
Submodule 'repos/javascript'
(https://github.com/tree-sitter/tree-sitter-javascript) registered for
path 'repos/javascript'
Submodule 'repos/jsdoc'
(https://github.com/tree-sitter/tree-sitter-jsdoc) registered for path
'repos/jsdoc'
Submodule 'repos/json'
(https://github.com/tree-sitter/tree-sitter-json) registered for path
'repos/json'
Submodule 'repos/julia'
(https://github.com/tree-sitter/tree-sitter-julia) registered for path
'repos/julia'
Submodule 'repos/ocaml'
(https://github.com/tree-sitter/tree-sitter-ocaml) registered for path
'repos/ocaml'
Submodule 'repos/php' (https://github.com/tree-sitter/tree-sitter-php)
registered for path 'repos/php'
Submodule 'repos/python'
(https://github.com/tree-sitter/tree-sitter-python) registered for
path 'repos/python'
Submodule 'repos/ruby'
(https://github.com/tree-sitter/tree-sitter-ruby) registered for path
'repos/ruby'
Submodule 'repos/rust'
(https://github.com/tree-sitter/tree-sitter-rust) registered for path
'repos/rust'
Submodule 'repos/scala'
(https://github.com/tree-sitter/tree-sitter-scala) registered for path
'repos/scala'
Submodule 'repos/swift'
(https://github.com/tree-sitter/tree-sitter-swift) registered for path
'repos/swift'
Submodule 'repos/typescript'
(https://github.com/tree-sitter/tree-sitter-typescript) registered for
path 'repos/typescript'
Skipping submodule 'repos/agda'
Skipping submodule 'repos/bash'
Skipping submodule 'repos/c'
Skipping submodule 'repos/c-sharp'
Skipping submodule 'repos/cpp'
Skipping submodule 'repos/css'
Skipping submodule 'repos/elm'
Skipping submodule 'repos/fluent'
Skipping submodule 'repos/go'
Skipping submodule 'repos/html'
Skipping submodule 'repos/janet-simple'
Skipping submodule 'repos/java'
Skipping submodule 'repos/javascript'
Skipping submodule 'repos/jsdoc'
Skipping submodule 'repos/json'
Skipping submodule 'repos/julia'
Skipping submodule 'repos/ocaml'
Skipping submodule 'repos/php'
Skipping submodule 'repos/python'
Skipping submodule 'repos/ruby'
Skipping submodule 'repos/rust'
Skipping submodule 'repos/scala'
Skipping submodule 'repos/swift'
Skipping submodule 'repos/typescript'
```

On Tue, Jun 15, 2021 at 5:51 PM brian m. carlson
<sandals@crustytoothpaste.net> wrote:
>
> On 2021-06-16 at 00:16:06, Rose Kunkel wrote:
> > # What did you do before the bug happened? (Steps to reproduce your issue)
> > 1. Clone a git repository that sets `update = none` in .gitmodules:
> > $ git clone --recurse-submodules https://github.com/ubolonton/tree-sitter-langs
> >
> > 2. Perform a hard reset:
> > $ cd tree-sitter-langs
> > $ git reset --hard
> >
> > # What did you expect to happen? (Expected behavior)
> > The reset should succeed and do nothing.
>
> I think we're in agreement on this.  This should be a fresh clone and so
> a hard reset should change nothing.
>
> > # What happened instead? (Actual behavior)
> > The reset command fails with
> > ```
> > fatal: not a git repository: ../../.git/modules/repos/agda
> > fatal: could not reset submodule index
> > ```
>
> Hmmm, I can't reproduce this behavior.  What I see is this:
>
>   $ git reset --hard
>   HEAD is now at 5d362ce Release 0.10.0
>
> I'm running git version 2.32.0.272.g935e593368 on Debian sid (with the
> experimental packages).
>
> Can you try the clone and run a "git status" command in the repository
> to see if anything is modified after your clone?  Are the submodules
> checked out when you perform the clone?  In my case, I see lines like
> this:
>
>   Skipping submodule 'repos/agda'
>
> If you're seeing something different, then that might contribute to the
> different behavior we're seeing.
> --
> brian m. carlson (he/him or they/them)
> Toronto, Ontario, CA