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See merge commit 66693401

This commit also adds a check for a left-over testsuite/.git folder to sync-all

This way, the first time sync-all is called after updating to a
post-testsuite-merge (see #8545) state of ghc.git, the sync-all script
aborts with an error message if a `testsuite/.git` folder is detected and
thus forces the user to take action.
Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>

This applies attachment:sync-all-submodules-locally.diff from #8369

Authored-by: Nathaniel Filardo
Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>

By keeping the repository url in the `packages` file scripts such as
source:ghc/sync-all can pick it up. Moreover, it's easier to
automatically validate for correctness than the
wiki:Repositories/Upstream page.

If the check detects an obsolete URL, show a warning and tell the user how
to invoke `sync-all` in order to update the local Git repo to point to the new
repository URLs.

This is related to #8121

We weren't considering 'msys' for the $OSNAME.
Signed-off-by: Austin Seipp <aseipp@pobox.com>

This reverts commit 2e41f2fa.
Signed-off-by: Austin Seipp <aseipp@pobox.com>

...as the new `git.haskell.org` CNAME has been activated
(see also GitolitePlan and #8121 for more details)

Signed-off-by: Austin Seipp <aseipp@pobox.com>

This is a test commit for addressing #8121

A simple heuristic (i.e. replacing the `libraries/` suffix by
`packages/` in the inferred remotepath, if the remotepath in the
`packages` file is "-") used to infer the remotepath for Git
submodules. A proper solution would require to parse the `.gitmodules`
file to obtain the actual localpath<->remotepath mapping.

This addresses #8121 and is a follow-up to a22e908a which changed the
`.gitmodules` urls to use the `/packages/` folder instead of
`/libraries/`.

This means that ghc-tarballs is only needed on Windows

It's now always 'git'.

Apparently git ignores the --git-dir argument.

Based on a patch from rassilon.

A standard git push doesn't make sense for them

It now checks that the directory exists before complaining that it's
old.

The .git file in a submodule's root directory is not necessarily a
directory, as is the case for the 'time' submodule.

This fixes #7577, where some './sync-all' operations don't detect
that the 'time' submodule is present in the repository.

We now remember the current working directory right at the start,
and change back to it after we've finished working in a subdirectory.

This should fix a problem some people have been seeing, where
sync-all thinks that they have an out-of-date time library because
its working directory has gone wrong somehow.

By filtering out the --rebase when fetching submodules

Apparently .git can be a file rather than a directory in some cases

It wasn't handling new submodules appearing

Leave it to 'git submodule init/update'