1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
|
;;; ob-haskell.el --- Babel Functions for Haskell -*- lexical-binding: t; -*-
;; Copyright (C) 2009-2020 Free Software Foundation, Inc.
;; Author: Eric Schulte
;; Keywords: literate programming, reproducible research
;; Homepage: https://orgmode.org
;; This file is part of GNU Emacs.
;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;; Org-Babel support for evaluating haskell source code. This one will
;; be sort of tricky because haskell programs must be compiled before
;; they can be run, but haskell code can also be run through an
;; interactive interpreter.
;;
;; For now lets only allow evaluation using the haskell interpreter.
;;; Requirements:
;; - haskell-mode :: http://www.iro.umontreal.ca/~monnier/elisp/#haskell-mode
;;
;; - inf-haskell :: http://www.iro.umontreal.ca/~monnier/elisp/#haskell-mode
;;
;; - (optionally) lhs2tex :: http://people.cs.uu.nl/andres/lhs2tex/
;;; Code:
(require 'ob)
(require 'org-macs)
(require 'comint)
(declare-function haskell-mode "ext:haskell-mode" ())
(declare-function run-haskell "ext:inf-haskell" (&optional arg))
(declare-function inferior-haskell-load-file
"ext:inf-haskell" (&optional reload))
(defvar org-babel-tangle-lang-exts)
(add-to-list 'org-babel-tangle-lang-exts '("haskell" . "hs"))
(defvar org-babel-default-header-args:haskell
'((:padlines . "no")))
(defvar org-babel-haskell-lhs2tex-command "lhs2tex")
(defvar org-babel-haskell-eoe "\"org-babel-haskell-eoe\"")
(defvar haskell-prompt-regexp)
(defun org-babel-execute:haskell (body params)
"Execute a block of Haskell code."
(require 'inf-haskell)
(add-hook 'inferior-haskell-hook
(lambda ()
(setq-local comint-prompt-regexp
(concat haskell-prompt-regexp "\\|^λ?> "))))
(let* ((session (cdr (assq :session params)))
(result-type (cdr (assq :result-type params)))
(full-body (org-babel-expand-body:generic
body params
(org-babel-variable-assignments:haskell params)))
(session (org-babel-haskell-initiate-session session params))
(comint-preoutput-filter-functions
(cons 'ansi-color-filter-apply comint-preoutput-filter-functions))
(raw (org-babel-comint-with-output
(session org-babel-haskell-eoe t full-body)
(insert (org-trim full-body))
(comint-send-input nil t)
(insert org-babel-haskell-eoe)
(comint-send-input nil t)))
(results (mapcar #'org-strip-quotes
(cdr (member org-babel-haskell-eoe
(reverse (mapcar #'org-trim raw)))))))
(org-babel-reassemble-table
(let ((result
(pcase result-type
(`output (mapconcat #'identity (reverse (cdr results)) "\n"))
(`value (car results)))))
(org-babel-result-cond (cdr (assq :result-params params))
result (org-babel-script-escape result)))
(org-babel-pick-name (cdr (assq :colname-names params))
(cdr (assq :colname-names params)))
(org-babel-pick-name (cdr (assq :rowname-names params))
(cdr (assq :rowname-names params))))))
(defun org-babel-haskell-initiate-session (&optional _session _params)
"Initiate a haskell session.
If there is not a current inferior-process-buffer in SESSION
then create one. Return the initialized session."
(require 'inf-haskell)
(or (get-buffer "*haskell*")
(save-window-excursion (run-haskell) (sleep-for 0.25) (current-buffer))))
(defun org-babel-load-session:haskell (session body params)
"Load BODY into SESSION."
(save-window-excursion
(let* ((buffer (org-babel-prep-session:haskell session params))
(load-file (concat (org-babel-temp-file "haskell-load-") ".hs")))
(with-temp-buffer
(insert body) (write-file load-file)
(haskell-mode) (inferior-haskell-load-file))
buffer)))
(defun org-babel-prep-session:haskell (session params)
"Prepare SESSION according to the header arguments in PARAMS."
(save-window-excursion
(let ((buffer (org-babel-haskell-initiate-session session)))
(org-babel-comint-in-buffer buffer
(mapc (lambda (line)
(insert line)
(comint-send-input nil t))
(org-babel-variable-assignments:haskell params)))
(current-buffer))))
(defun org-babel-variable-assignments:haskell (params)
"Return list of haskell statements assigning the block's variables."
(mapcar (lambda (pair)
(format "let %s = %s"
(car pair)
(org-babel-haskell-var-to-haskell (cdr pair))))
(org-babel--get-vars params)))
(defun org-babel-haskell-var-to-haskell (var)
"Convert an elisp value VAR into a haskell variable.
The elisp VAR is converted to a string of haskell source code
specifying a variable of the same value."
(if (listp var)
(concat "[" (mapconcat #'org-babel-haskell-var-to-haskell var ", ") "]")
(format "%S" var)))
(defvar org-export-copy-to-kill-ring)
(declare-function org-export-to-file "ox"
(backend file
&optional async subtreep visible-only body-only
ext-plist post-process))
(defun org-babel-haskell-export-to-lhs (&optional arg)
"Export to a .lhs file with all haskell code blocks escaped.
When called with a prefix argument the resulting
.lhs file will be exported to a .tex file. This function will
create two new files, base-name.lhs and base-name.tex where
base-name is the name of the current Org file.
Note that all standard Babel literate programming
constructs (header arguments, no-web syntax etc...) are ignored."
(interactive "P")
(let* ((contents (buffer-string))
(haskell-regexp
(concat "^\\([ \t]*\\)#\\+begin_src[ \t]haskell*\\(.*\\)[\r\n]"
"\\([^\000]*?\\)[\r\n][ \t]*#\\+end_src.*"))
(base-name (file-name-sans-extension (buffer-file-name)))
(tmp-file (org-babel-temp-file "haskell-"))
(tmp-org-file (concat tmp-file ".org"))
(tmp-tex-file (concat tmp-file ".tex"))
(lhs-file (concat base-name ".lhs"))
(tex-file (concat base-name ".tex"))
(command (concat org-babel-haskell-lhs2tex-command
" " (org-babel-process-file-name lhs-file)
" > " (org-babel-process-file-name tex-file)))
(preserve-indentp org-src-preserve-indentation)
indentation)
;; escape haskell source-code blocks
(with-temp-file tmp-org-file
(insert contents)
(goto-char (point-min))
(while (re-search-forward haskell-regexp nil t)
(save-match-data (setq indentation (length (match-string 1))))
(replace-match (save-match-data
(concat
"#+begin_export latex\n\\begin{code}\n"
(if (or preserve-indentp
(string-match "-i" (match-string 2)))
(match-string 3)
(org-remove-indentation (match-string 3)))
"\n\\end{code}\n#+end_export\n"))
t t)
(indent-code-rigidly (match-beginning 0) (match-end 0) indentation)))
(save-excursion
;; export to latex w/org and save as .lhs
(require 'ox-latex)
(find-file tmp-org-file)
;; Ensure we do not clutter kill ring with incomplete results.
(let (org-export-copy-to-kill-ring)
(org-export-to-file 'latex tmp-tex-file))
(kill-buffer nil)
(delete-file tmp-org-file)
(find-file tmp-tex-file)
(goto-char (point-min)) (forward-line 2)
(insert "%include polycode.fmt\n")
;; ensure all \begin/end{code} statements start at the first column
(while (re-search-forward "^[ \t]+\\\\begin{code}[^\000]+\\\\end{code}" nil t)
(replace-match (save-match-data (org-remove-indentation (match-string 0)))
t t))
(setq contents (buffer-string))
(save-buffer) (kill-buffer nil))
(delete-file tmp-tex-file)
;; save org exported latex to a .lhs file
(with-temp-file lhs-file (insert contents))
(if (not arg)
(find-file lhs-file)
;; process .lhs file with lhs2tex
(message "running %s" command) (shell-command command) (find-file tex-file))))
(provide 'ob-haskell)
;;; ob-haskell.el ends here
|
