It still reports local config's optimization level if it was set.

Fix #8487.

* add TypeData language extension (ghc proposal 106)

* changelog entry for PR 8493

* add TypeData to cabal.vim

* update MD5 hashes

* Update changelog.d/pr-8493

adjusted wording

Co-authored-by: Artem Pelenitsyn <a.pelenitsyn@gmail.com>

* add DeepSubsumption as suggesterd by Artem Pelenitsyn

* update MD5sums

Co-authored-by: Artem Pelenitsyn <a.pelenitsyn@gmail.com>

Stick to GHC 8.10.7 in CI until changelog-d is updated and update CI job names to permit making them mandatory in Settings

* Move towards using XDG directories.

* Install binaries in $HOME/.local/bin.

* Fix tests.

* Ensure config file is where it should be.

* Require newer directory for XdgState.

* Put world file in XDG_STATE_HOME.

* Oops, forgot to import.

* Remove uses of getCabalDir.

* These all need directory-1.3.7.0 now.

* Oh right, not a builtin anymore.

If this works I will also change the other .json files.

* Try it by hand.

* Haskell is better than JSON.

* Bump directory in all jsons.

* Put directory first.

* Let us assume that getConfigFilePath gets this right.

* Implement backwards compatibility.

* This is now elsewhere.

* We need to create parents as well because ~/.local might not exist.

* Put scripts-build in distinct cache directory.

* Document XDG behaviour.

* Remove help text references to ~/.cabal.

* Remove references to .cabla/bin.

* Backwards compatible install paths.

* Remove more references to ~/.cabal.

* Fix typo.

* Fix ~/.cabal paths making their way into default config.

* Reduce duplication.

* Add changelog entry.

* Also note install dir change.

* It is the cabal-install config file.

* Avoid dependending on cabal-install in Hackage-tests.

* ALso respect CABAL_DIR here.

* Try leaving InstallDirs alone.

* Also need duplication here.

* Add missing newline.

* Fix doc typos.

* Make this a Haddock comment.

* Revision field must not be null.

* Link directories.

* Update doc/config.rst

Co-authored-by: Artem Pelenitsyn <a.pelenitsyn@gmail.com>

* No need for this.

* We install foreign libraries here now.

* Clarify Nothing case.

* Avoid using ~/.config/cabal in manual.

Co-authored-by: Mikolaj Konarski <mikolaj@well-typed.com>
Co-authored-by: Artem Pelenitsyn <a.pelenitsyn@gmail.com>

Work around CI problem from ghcup switch to GHC 9.2

This reverts commit a94b3f54.

Support GHC 9.4

plans viable from 7.x through 9.4

Tracked as #8451.

ForeignLibs test was marked as broken on Mac for GHC 8.0 but we dropped
8.0 support, so that info was removed.

[ci skip] Enable opensearch in Cabal documentation

Bump unix bound to allow unix-2.8

Reorder `cabal help` commands

* only check for compiler when project file has conditionals

* fix sdist options a bit plus test

* whitespace

* poke tests around

* Update cabal.out

* Update cabal.test.hs

* changelog/docs

Co-authored-by: Gershom Bazerman <gershom@arista.com>

gitlab CI generates deb11 images

cabal man handles $PAGER with more than one word now

Allow offline bootstrapping of cabal-install

This ports to cabal-install the offline bootstrapping logic which was
introduced for Hadrian in GHC MR !6315.

This adds a "fetch" command to the bootstrap script, which fetches
all the dependency tarballs from Hackage, to be used in an offline
build. See bootstrap/README.md for further information.

* pass some haddock flags to dependencies

* add tests

* add changelog

* fix whitespace

* fix test on MacOS

Revert "Revert "Turn off DeterministicTrivial test (see #8356)""

It still hits us. All updates are over on #8356.

This reverts commit c68ed017.

Fixed changelog entry for haddock-package command