95 lines
3.2 KiB
Org Mode
95 lines
3.2 KiB
Org Mode
#+title: Programming Haskell
|
||
#+author: Howard X. Abrams
|
||
#+date: 2022-08-24
|
||
#+tags: emacs haskell programming
|
||
|
||
A literate programming file for configuring Emacs to use [[https://www.haskell.org/][Haskell]] .
|
||
#+begin_src emacs-lisp :exports none
|
||
;;; ha-programming-haskell --- configuring for haskell. -*- lexical-binding: t; -*-
|
||
;;
|
||
;; © 2022-2023 Howard X. Abrams
|
||
;; Licensed under a Creative Commons Attribution 4.0 International License.
|
||
;; See http://creativecommons.org/licenses/by/4.0/
|
||
;;
|
||
;; Author: Howard X. Abrams <http://gitlab.com/howardabrams>
|
||
;; Maintainer: Howard X. Abrams
|
||
;; Created: August 24, 2022
|
||
;;
|
||
;; While obvious, GNU Emacs does not include this file or project.
|
||
;;
|
||
;; *NB:* Do not edit this file. Instead, edit the original literate file at:
|
||
;; ~/other/hamacs/ha-programming-haskell.org
|
||
;; And tangle the file to recreate this one.
|
||
;;
|
||
;;; Code:
|
||
#+end_src
|
||
* Introduction
|
||
While “they” claim a [[https://www.haskell.org/tutorial/][Gentle Introduction]], it doesn’t look /fun/. I bought the book, [[http://learnyouahaskell.com/chapters][Learn You a Haskell for Great Good!]], which looks better. Before an /Emacsian/ can dive into a new language, one needs to get an Emacs environment working.
|
||
|
||
First, get it installed. On a Mac, do something like:
|
||
#+begin_src sh
|
||
brew install haskell-stack
|
||
#+end_src
|
||
Which installs the [[https://docs.haskellstack.org/][Haskell Stack]] project that is basically an interface to the /kitchen sink/.
|
||
|
||
And then run:
|
||
#+begin_src sh
|
||
stack setup
|
||
#+end_src
|
||
|
||
And then you get access to an interactive session in a virtual environment with:
|
||
#+begin_src sh
|
||
stack ghci
|
||
#+end_src
|
||
* Haskell Mode
|
||
Seems that the venerable [[https://github.com/haskell/haskell-mode][haskell-mode]] is the best.
|
||
#+begin_src emacs-lisp
|
||
(use-package haskell-mode
|
||
:custom
|
||
(haskell-process-type 'stack-ghci))
|
||
#+end_src
|
||
|
||
See [[https://input-output-hk.github.io/adrestia/resources/Emacs][this configuration]] for some advanced features.
|
||
|
||
The [[https://github.com/mihaimaruseac/hindent][hindent package]] looks interesting:
|
||
#+begin_src emacs-lisp
|
||
(use-package hindent
|
||
:custom (hindent-style "johan-tibell")
|
||
:hook (haskell-mode . #'hindent-mode))
|
||
#+end_src
|
||
* Haskell and Org
|
||
#+begin_src emacs-lisp
|
||
(use-package ob-haskell
|
||
:straight (:type built-in)
|
||
:config
|
||
(add-to-list 'org-babel-load-languages '(haskell . t)))
|
||
#+end_src
|
||
|
||
And let’s see if this works:
|
||
#+begin_src haskell :results replace value
|
||
nums = filter (> 2) [1 .. 5]
|
||
zip nums ['a' .. 'e']
|
||
#+end_src
|
||
|
||
#+RESULTS:
|
||
| 3 | a |
|
||
| 4 | b |
|
||
| 5 | c |
|
||
|
||
* Technical Artifacts :noexport:
|
||
Let's =provide= a name so we can =require= this file:
|
||
#+begin_src emacs-lisp :exports none
|
||
(provide 'ha-programming-haskell)
|
||
;;; ha-programming-haskell.el ends here
|
||
#+end_src
|
||
|
||
#+DESCRIPTION: configuring Emacs.
|
||
|
||
#+PROPERTY: header-args:sh :tangle no
|
||
#+PROPERTY: header-args:emacs-lisp :tangle yes
|
||
#+PROPERTY: header-args :results none :eval no-export :comments no mkdirp yes
|
||
|
||
#+OPTIONS: num:nil toc:t todo:nil tasks:nil tags:nil date:nil
|
||
#+OPTIONS: skip:nil author:nil email:nil creator:nil timestamp:nil
|
||
#+INFOJS_OPT: view:nil toc:t ltoc:t mouse:underline buttons:0 path:http://orgmode.org/org-info.js
|