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[Haskell] Make installation instructions for `hie` more clear

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Maximilian Wolff 2020-02-10 20:12:50 +00:00
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@ -81,7 +81,6 @@ This layer requires some [[https://www.haskell.org/cabal/][cabal]] packages:
- =hoogle= (optional for =haskell-mode= and =helm-hoogle=)
- =ghc-mod= (optional for completion)
- =intero= (optional for completion)
- =hie= (optional for completion)
To install them, use the following command (or the =stack= equivalent):
@ -169,8 +168,11 @@ build =ghc-mod=. You can check which version was used by calling
=ghc-mod --version=.
*** =lsp=
=lsp= requires an appropriate installation of =hie= to provide the Haskell language server.
=hie= is built on =ghc-mod=, so many of the same considerations apply.
=lsp= requires an appropriate installation of =hie= the official Haskell language server to work properly.
=hie= is like an improved version of =ghc-mod= it is best installed by building it locally as it requires
that the same GHC version has been used to compile your code as has been used for =hie=.
To install it please refer to the official installation instructions [[https://github.com/haskell/haskell-ide-engine#installation][here]].
Enabling the =lsp= backend requires the =lsp= layer to be enabled, and provides access to
all the additional =lsp-mode= key bindings. As such it is more of a full backend than just