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
|
;;; inf-haskell.el --- Interaction with an inferior Haskell process.
;; Copyright (C) 2004 Free Software Foundation, Inc.
;; Author: Stefan Monnier <monnier@iro.umontreal.ca>
;; Keywords: Haskell
;; This file 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 2, or (at your option)
;; any later version.
;; This file 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; see the file COPYING. If not, write to
;; the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
;;; Commentary:
;; The code is made of 2 parts: a major mode for the buffer that holds the
;; infeiror process's session and a minor mode for use in source buffers.
;;; Code:
(require 'comint)
(require 'shell) ;For directory tracking.
(require 'compile)
;; Here I depart from the inferior-haskell- prefix.
;; Not sure if it's a good idea.
(defcustom haskell-program-name "hugs \"+.\""
"The name of the command to start the inferior Haskell process.
The command can include arguments."
:options '("hugs \"+.\"" "ghci")
:group 'haskell
:type '(choice string (repeat string)))
(defconst inferior-haskell-error-regexp-alist
;; The format of error messages used by Hugs.
'(("^ERROR \"\\(.+?\\)\"\\(:\\| line \\)\\([0-9]+\\) - " 1 3)
;; Format of error messages used by GHCi.
("^\\(.+?\\):\\([0-9]\\):\\( \\|$\\)" 1 3)
)
"Regexps for error messages generated by inferior Haskell processes.
The format should be the same as for `compilation-error-regexp-alist'.")
(define-derived-mode inferior-haskell-mode comint-mode "Inf-Haskell"
"Major mode for interacting with an inferior Haskell process."
(set (make-local-variable 'comint-prompt-regexp)
"^\\*?[A-Z][\\._a-zA-Z0-9]*\\( \\*?[A-Z][\\._a-zA-Z0-9]*\\)*> ")
(set (make-local-variable 'comint-input-autoexpand) nil)
;; Setup directory tracking.
(set (make-local-variable 'shell-dirtrackp) t)
(set (make-local-variable 'shell-cd-regexp) ":cd")
(add-hook 'comint-input-filter-functions 'shell-directory-tracker nil 'local)
;; Setup `compile' support so you can just use C-x ` and friends.
(set (make-local-variable 'compilation-error-regexp-alist)
inferior-haskell-error-regexp-alist)
(cond
((fboundp 'compilation-shell-minor-mode) (compilation-shell-minor-mode 1))
((fboundp 'compilation-minor-mode) (compilation-minor-mode 1))))
(defun inferior-haskell-string-to-strings (string &optional separator)
"Split the STRING into a list of strings.
The SEPARATOR regexp defaults to \"\\s-+\"."
(let ((sep (or separator "\\s-+"))
(i (string-match "[\"]" string)))
(if (null i) (split-string string sep) ; no quoting: easy
(append (unless (eq i 0) (split-string (substring string 0 i) sep))
(let ((rfs (read-from-string string i)))
(cons (car rfs)
(inferior-haskell-string-to-strings
(substring string (cdr rfs)) sep)))))))
(defun inferior-haskell-command (arg)
(inferior-haskell-string-to-strings
(if (null arg) haskell-program-name
(read-string "Command to run haskell: "))))
(defvar inferior-haskell-buffer nil
"The buffer in which the inferior process is running.")
(defun inferior-haskell-start-process (command)
"Start an inferior haskell process.
With universal prefix \\[universal-argument], prompts for a command,
otherwise uses `haskell-program-name'.
It runs the hook `inferior-haskell-hook' after starting the process and
setting up the inferior-haskell buffer."
(interactive (list (inferior-haskell-command current-prefix-arg)))
(setq inferior-haskell-buffer
(apply 'make-comint "haskell" (car command) nil (cdr command)))
(with-current-buffer inferior-haskell-buffer
(inferior-haskell-mode)
(run-hooks 'inferior-haskell-hook)))
(defun inferior-haskell-process (&optional arg)
(or (if (buffer-live-p inferior-haskell-buffer)
(get-buffer-process inferior-haskell-buffer))
(progn
(let ((current-prefix-arg arg))
(call-interactively 'inferior-haskell-start-process))
;; Try again.
(inferior-haskell-process arg))))
;;;###autoload
(defalias 'run-haskell 'switch-to-haskell)
;;;###autoload
(defun switch-to-haskell (&optional arg)
"Show the inferior-haskell buffer. Start the process if needed."
(interactive "P")
(let ((proc (inferior-haskell-process arg)))
(pop-to-buffer (process-buffer proc))))
;;;###autoload
(defun inferior-haskell-load-file (&optional reload)
"Pass the current buffer's file to the inferior haskell process."
(interactive)
(let ((file buffer-file-name)
(proc (inferior-haskell-process)))
(save-buffer)
(with-current-buffer (process-buffer proc)
;; Not sure if it's useful/needed and if it actually works.
;; (unless (equal (file-name-as-directory default-directory)
;; (file-name-directory file))
;; (inferior-haskell-send-string
;; proc (concat ":cd " (file-name-directory file) "\n")))
(compilation-forget-errors)
(inferior-haskell-send-command
proc (if reload ":reload" (concat ":load " file))))))
(defun inferior-haskell-send-command (proc str)
(setq str (concat str "\n"))
(with-current-buffer (process-buffer proc)
(while (and
(goto-char comint-last-input-end)
(not (re-search-forward comint-prompt-regexp nil t))
(accept-process-output proc)))
(goto-char (process-mark proc))
(insert-before-markers str)
(move-marker comint-last-input-end (point))
(comint-send-string proc str)))
(defun inferior-haskell-reload-file ()
"Tell the inferior haskell process to reread the current buffer's file."
(interactive)
(inferior-haskell-load-file 'reload))
(provide 'inf-haskell)
;;; inf-haskell.el ends here
|
