Julian Ospald 1fb7d122d1 Expose ghcup binary to PATH on windows (#4264) ...

* Expose ghcup binary to PATH on windows

The bootstrap-haskell.ps1 script uses
'[System.EnvironmentVariableTarget]::User' instead of
'[System.EnvironmentVariableTarget]::Machine', so it appears
ghcup env vars and PATH update never make it. Do these manually
for now.

* Set CABAL_DIR and make sure config is adjusted

The config adjustment usually includes adding msys2 directories,
so cabal can find `pkg-config` and libraries, e.g.:

+ C: \ghcup\msys64\mingw64\bin
+ extra-include-dirs: C:\ghcup\msys64\mingw64\include
+ extra-lib-dirs: C:\ghcup\msys64\mingw64\lib
- extra-prog-path: C:\cabal\bin
+ extra-prog-path: C:\ghcup\bin,

* Expose cabal dir to PATH as well

* Use Set-SystemVariable

* Fix tests

* Use hardcoded cabal dir

* Fix bootstrap-haskell

* Move test after installation

* Print ghcup installation message

* Don't adjust cabal.config (to include mingw paths)

This may break setups.

2021-12-10 11:23:44 +03:00

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