Backport batch 1 for 3.2

Related issues are https://github.com/haskell/cabal/issues/6437
and https://github.com/reflex-frp/reflex/issues/375

Or replace

    Just foo = rhs

with

    foo = fromMaybe (error "...") rhs

which there are plenty. I didn't tried to refactor these errors away,
let cabal panic, if it hits them.

Resolve #5919
Resolve #6410

Add `withProjectOrGlobalConfigIgn` to unify the behaviour with `-z` in `cabal
repl`

Bump version 3.2

Herbert Valerio Riedel authored 6 years ago and Oleg Grenrus committed 5 years ago

These are only supported properly starting with
cabal-version:3.0 (which has been enforced by
Hackage as well -- via this very patch).

See #6033 for details

Normalise ghc args 8.10

Sergey Vinokurov authored 5 years ago and Oleg Grenrus committed 5 years ago

I.e. don’t rebuild everything when a ghc flag that affects how error
messages are presented is added.

Use ShortText in IPI

Resolve #6451: Add alaSet to D.Parsec.Newtypes

Small changes towards 3.2

IOData improvements and faster ghc-pkg dump parsing

Takenobu Tani authored 5 years ago and Oleg Grenrus committed 5 years ago

These extensions already landed in master and ghc-8.10 branch:
  * CUSKs
  * ImportQualifiedPost
  * StandaloneKindSignatures
  * UnliftedNewtypes

Please see also:
  * https://gitlab.haskell.org/ghc/ghc/blob/master/docs/users_guide/8.10.1-notes.rst
  * https://gitlab.haskell.org/ghc/ghc/blob/master/testsuite/tests/driver/T4437.hs

Parsing the `ghc-dump` is now two times faster and uses less memory.
For big cabal nix-stores this speedup is noticeable:

Also improve the `process` wrapper. Now ignores SIGPIPE.

Structured binary

It defines `Structured` type class, which we use to prepend
a hash to cached `Binary` blobs. Thus we can catch early, if
format is changed, avoiding corrupt cache making cabal
behave weirdly.

Plenty types got Typeable instances, as it's a superclass of Structured

This commit also introduces new compat modules:

- Distribution.Compat.Typeable with typeRep
- Distribution.Client.Compat.Orphans,
  to collect at least some orphans into central place.

Freeze the versions of cabal-testsuite and solver-benchmarks

Validate rearrangements

Which are the extremes of support window at the moment.

This makes e.g. LibV09 test work properly

This is very useful for validate.sh script,
We should be aware of which tests are skipped.
Perfectly, SKIP should tell a reason.

regex-tdfa-1.3.1.0