update haskell README
Improve PATH section. As requested in #2142. Also make some minor improvements.
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@ -22,9 +22,9 @@
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- [[#cabal-commands][Cabal commands]]
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- [[#cabal-files][Cabal files]]
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- [[#faq][FAQ]]
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- [[#repl-doesnt-work][REPL doesn't work.]]
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- [[#i-am-using-stack-and-ghc-mod-but-ghc-mod-doesnt-work][I am using =stack= and =ghc-mod=, but =ghc-mod= doesn't work.]]
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- [[#repl-is-stuck][REPL is stuck.]]
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- [[#repl-doesnt-work][REPL doesn't work]]
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- [[#i-am-using-stack-and-ghc-mod-but-ghc-mod-doesnt-work][I am using =stack= and =ghc-mod=, but =ghc-mod= doesn't work]]
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- [[#repl-is-stuck][REPL is stuck]]
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* Description
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This layer adds support for the [[https://www.haskell.org/][Haskell]] language.
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@ -36,7 +36,6 @@ This layer adds support for the [[https://www.haskell.org/][Haskell]] language.
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*This layer is in construction, it needs your contributions and bug reports.*
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* Install
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** Layer
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To use this contribution add it to your =~/.spacemacs=
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@ -64,14 +63,35 @@ following command:
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#+END_SRC
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** Setup PATH
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First of all make sure that your =$PATH= contains installation path for Haskell
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tools like =ghc=, =ghci= etc. It depends on how you have installed =ghc=. But
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you can always check it by calling =$ which ghc= in your terminal. =Stack= users
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should add only installation path of =stack= itself, usually it's
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=~/.local/bin=.
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Make sure that your =$PATH= contains installation path for =cabal= packages. If
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you are using =cabal= it should be =~/.cabal/bin= or
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=/Users/<username>/Library/Haskell/bin= (for Haskell for Mac users). If you are
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using =stack= then it should be =~/.local/bin=. So if this path is not in
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=$PATH=, just add it and Spacemacs will automatically pick up shell =$PATH=.
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Then make sure that your =$PATH= contains installation path for =cabal=
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packages. If you are using =cabal= it should be =~/.cabal/bin= or
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=/Users/<username>/Library/Haskell/bin= (for 'Haskell for Mac' users). If you
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are using =stack= then it should be =~/.local/bin=.
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_Alternatively_, you can add it to the Emacs =exec-path= variable in the
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If you are using =bash=, =sh= or =zsh=, you could update your =$PATH= by using
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following command:
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#+BEGIN_SRC sh
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$ export PATH=~/.local/bin:$PATH
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#+END_SRC
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If you are using =fish=, you could update your =$PATH= by using following
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command:
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#+BEGIN_SRC fish
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$ set -x PATH ~/.local/bin $PATH
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#+END_SRC
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After you setup your =$PATH=, emacs should automatically pick it's value (after
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restart).
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_Alternatively_, you can add path to the Emacs =exec-path= variable in the
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=dotspacemacs/user-config= function of your =.spacemacs= file:
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#+BEGIN_SRC emacs-lisp
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@ -270,8 +290,7 @@ This commands are available in a cabal file.
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* FAQ
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** REPL doesn't work.
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** REPL doesn't work
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Usually =haskell-mode= is great at figuring out which interactive process to
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bring up. But if you are experiencing problems with it you can help
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=haskell-mode= by setting =haskell-process-type= as in following code:
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@ -289,13 +308,11 @@ Available options are:
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- cabal-ghci
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- stack-ghci
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** I am using =stack= and =ghc-mod=, but =ghc-mod= doesn't work.
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** I am using =stack= and =ghc-mod=, but =ghc-mod= doesn't work
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Make sure that =dist= directory doesn't exist in your project root. So if it
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exists, just remove it and try again.
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** REPL is stuck.
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** REPL is stuck
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Make sure that when you are typing anything in REPL there is a space between
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what you type and =λ=. This problem usually happens when you switch from normal
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mode to edit mode.
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what you type and =λ>=. This problem usually happens when you switch from normal
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mode to insert mode.
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