Add -fexpose-all-unfoldings to parsec and Cabal in release project

Test cabal-install with GHC-8.10

See https://github.com/haskell/parsec/pull/113#issuecomment-612997221
for benchmark results. This does speedup parsing.

Resolve #6691: Remove upgrade, uninstall and win32selfupgrade commands

Require cabal-versions >=1.25 to be exact

All three were hidden commands, first two were unimplemented
and the last one no-one knows about.

Add cabal init golden test exercising --libandexe behaviour.

Rename Regex to GrammarRegex to avoid confusion

The key item captured in this test is that when 'cabal init --libandexe' is run
in an empty directory it will result in a dependency on the library from the
executable in the form of 'build-depends = <package-name>' but with no version
constraints since they are implied by the version of the current package.

Also regenerate field grammar

update --build-depends help string

Fix typo

Reduce cabal init field offset formatting by one space.

This matches what is produced by PrettyField, so that when we switch over the
cabal file generation from manual formatting to PrettyField formatting we see
the true diffs and less field indent line noise.

Add FileCreators.generateCabalFile unit tests.

- [ci docs] doesn't work.
  We require CI to pass for non-admins to merge, so `[ci docs]` is
  more harmful. Also GitHub actions are reasonably fast,
  so overall it's ok to let it make builds

- Mention `changelog.d` directory

6610 Add pijul to known repository type

Default cabal init application-dir to app, and source-dir to src.

Separate modifiers by space in TotalIndexState

Sasha Bogicevic authored 5 years ago and Oleg Grenrus committed 5 years ago

cabal-install support is very WIP