72 lines
2.5 KiB
Markdown
72 lines
2.5 KiB
Markdown
# Happy Haskell Programming
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[](https://travis-ci.org/kazu-yamamoto/ghc-mod)
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Please read: [http://www.mew.org/~kazu/proj/ghc-mod/](http://www.mew.org/~kazu/proj/ghc-mod/)
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## Using the stable version
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The Emacs front-end is available from
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[*stable* MELPA](https://stable.melpa.org/). This package should
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always be compatible with the latest version of ghc-mod from hackage.
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To use stable *stable* MELPA add this to your `.emacs`:
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```elisp
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(require 'package)
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(add-to-list 'package-archives
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'("melpa" . "https://stable.melpa.org/packages/"))
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(package-initialize)
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```
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With this configuration you can install the Emacs front end from MELPA (the
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package is called `ghc` there, not `ghc-mod`) and install the
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`ghc-mod`/`ghc-modi` binaries from hackage by doing:
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```shell
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% cabal update && cabal install ghc-mod
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```
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### Nix & NixOS
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`ghc-mod` works fine for users of Nix who follow a recent version of the
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package database such as the `nixos-15.09` or `nixos-unstable` channel. Just
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include the package `ghc-mod` into your `ghcWithPackages` environment like any
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other library. The [Nixpkgs Haskell User's
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Guide](http://hydra.nixos.org/job/nixpkgs/trunk/manual/latest/download-by-type/doc/manual#users-guide-to-the-haskell-infrastructure)
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covers this subject in great detail.
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## Using the development version
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The easiest way to hack on ghc-mod is compile it, then add `dist/build/ghc-mod`
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and `dist/build/ghc-modi` to your `PATH` and add the `elisp/` directory to your
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Emacs `load-path`.
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Make sure you're not using the MELPA version of `ghc.el` otherwise you might get
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all sorts of nasty conflicts.
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## Custom ghc-mod cradle
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To customize the package databases used by `ghc-mod`, put a file called `ghc-mod.package-db-stack` beside the `.cabal` file with the following syntax:
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```
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temp directory root
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package db 1
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...
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package db n
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```
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each package database line is either a *path* to a package database, or `global` or `user`.
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## IRC
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If you have any problems, suggestions, comments swing by
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[\#ghc-mod (web client)](https://kiwiirc.com/client/irc.freenode.org/ghc-mod) on
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Freenode. If you're reporting a bug please also create an issue
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[here](https://github.com/kazu-yamamoto/ghc-mod/issues) so we have a way to contact
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you if you don't have time to stay.
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Do hang around for a while if no one answers and repeat your question if you
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still haven't gotten any answer after a day or so. You're most likely to get an
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answer during the day in GMT+1.
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