Can't initialise vendored submodule

[Sebastian Graf]

Hi,

I also frequently encounter these errors.
I think they are caused by me copying from an ancient local clone, one 
that still has historic account of when hadrian used to live in its own 
submodule.
Recently, the hadrian system vendored Cabal into hadrian/vendored/Cabal, 
but the root repository had still listed a submodule at 
.git/modules/hadrian, explaining the error.
Indeed, just removing the ancient .git/modules/hadrian is the solution.

Note that the vendored submodule means you cannot easily check out a 
branch from ... 5 years (?) ago, because then you will get the reverse 
error.
Fresh clones should not be affected.

Cheers,
Sebastian


------ Originalnachricht ------
Von "Arnaud Spiwack" <arnaud.spiwack at tweag.io>
An "Matthew Pickering" <matthewtpickering at gmail.com>
Cc "GHC developers" <ghc-devs at haskell.org>
Datum 02.08.2024 15:27:23
Betreff Re: Can't initialise vendored submodule

>Thanks Matthew, this helped me find the solution.
>
>Which, is turn out, was simply to remove the old directory:
>
>$  rm -rf .git/modules/hadrian/
>
>It's not removed by `git submodule desync` or any command that I could 
>find (though, now that I think about it, I didn't try to garbage 
>collect the repo, so maybe?). But it's sound to just delete, as far as 
>I can tell: it's just a cache.
>
> > The usage of submodules in `hadrian/vendored` is a standard usage.
>
>This goes to show that I was at least right when saying that submodules 
>are wonky :D .
>
>On Fri, 2 Aug 2024 at 12:11, Matthew Pickering 
><matthewtpickering at gmail.com> wrote:
>>It seems you might have a some very old configuration from when 
>>hadrian used to be a submodule? Perhaps a fresh clone would help 
>>things along?
>>
>>The usage of submodules in `hadrian/vendored` is a standard usage.
>>
>>Cheers,
>>
>>Matt
>>
>>On Fri, Aug 2, 2024 at 11:08 AM Vaibhav Sagar <vaibhavsagar at gmail.com> 
>>wrote:
>>>I think you want --recursive
>>>
>>>
>>>On Fri, 2 Aug 2024, 8:05 pm Arnaud Spiwack, <arnaud.spiwack at tweag.io> 
>>>wrote:
>>>>Dear all,
>>>>
>>>>I'm currently unable to build GHC's master branch as some of the 
>>>>submodules (presumably used by Hadrian) are making git pretty 
>>>>unhappy (I've used various variants of the command below, in a 
>>>>cleaned repository):
>>>>
>>>>```console
>>>>$  git submodule update --init
>>>>error: submodule git dir 
>>>>'/home/aspiwack/projects/tweag/ghc/master/.git/modules/hadrian/vendored/Cabal' 
>>>>is inside git dir 
>>>>'/home/aspiwack/projects/tweag/ghc/master/.git/modules/hadrian'
>>>>fatal: refusing to create/use 
>>>>'/home/aspiwack/projects/tweag/ghc/master/.git/modules/hadrian/vendored/Cabal' 
>>>>in another submodule's git dir
>>>>Failed to clone 'hadrian/vendored/Cabal'. Retry scheduled
>>>>error: submodule git dir 
>>>>'/home/aspiwack/projects/tweag/ghc/master/.git/modules/hadrian/vendored/Cabal' 
>>>>is inside git dir 
>>>>'/home/aspiwack/projects/tweag/ghc/master/.git/modules/hadrian'
>>>>fatal: refusing to create/use 
>>>>'/home/aspiwack/projects/tweag/ghc/master/.git/modules/hadrian/vendored/Cabal' 
>>>>in another submodule's git dir
>>>>Failed to clone 'hadrian/vendored/Cabal' a second time, aborting
>>>>```
>>>>
>>>>Please advise on how to get unblocked.
>>>>
>>>>And, if I'm allowed to conclude with a plea: please be careful not 
>>>>to abuse Git's submodule system, it's wonky enough when used simply.
>>>>
>>>>--
>>>>Arnaud Spiwack
>>>>Director, Research at https://moduscreate.com and https://tweag.io.
>>>>_______________________________________________
>>>>ghc-devs mailing list
>>>>ghc-devs at haskell.org
>>>>http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs
>>>_______________________________________________
>>>ghc-devs mailing list
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>
>
>--
>Arnaud Spiwack
>Director, Research at https://moduscreate.com and https://tweag.io.
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