forked from emacs-lsp/lsp-haskell
/
lsp-haskell.el
258 lines (232 loc) · 10.4 KB
/
lsp-haskell.el
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
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
;;; lsp-haskell.el --- Haskell support for lsp-mode
;; Version: 1.0
;; Package-Requires: ((lsp-mode "2.0") (haskell-mode "1.0"))
;; Keywords: haskell
;; URL: https://github.com/emacs-lsp/lsp-haskell
(require 'haskell)
(require 'lsp-mode)
;; ---------------------------------------------------------------------
;; HaRe functions
(defun lsp-demote ()
"Demote a function to the level it is used"
(interactive)
(lsp--cur-workspace-check)
(lsp--send-execute-command
"hare:demote"
(vector `(:file ,(concat "file://" buffer-file-name)
:pos ,(lsp-point-to-position (point))))))
(defun lsp-duplicate-definition (newname)
"Duplicate a definition"
(interactive "sNew definition name: ")
(lsp--cur-workspace-check)
(lsp--send-execute-command
"hare:dupdef"
(vector `(:file ,(concat "file://" buffer-file-name)
:pos ,(lsp-point-to-position (point))
:text ,newname))))
(defun lsp-if-to-case ()
"Convert an if statement to a case statement"
(interactive)
(lsp--cur-workspace-check)
(lsp--send-execute-command
"hare:iftocase"
(vector `(:file ,(concat "file://" buffer-file-name)
:start_pos ,(lsp-get-start-position)
:end_pos ,(lsp-get-end-position)))))
(defun lsp-lift-level ()
"Lift a function to the top level"
(interactive)
(lsp--cur-workspace-check)
(lsp--send-execute-command
"hare:liftonelevel"
(vector `(:file ,(concat "file://" buffer-file-name)
:pos ,(lsp-point-to-position (point))))))
(defun lsp-lift-to-top ()
"Lift a function to the top level"
(interactive)
(lsp--cur-workspace-check)
(lsp--send-execute-command
"hare:lifttotoplevel"
(vector `(:file ,(concat "file://" buffer-file-name)
:pos ,(lsp-point-to-position (point))))))
(defun lsp-delete-definition ()
"Delete a definition"
(interactive)
(lsp--cur-workspace-check)
(lsp--send-execute-command
"hare:deletedef"
(vector `(:file ,(concat "file://" buffer-file-name)
:pos ,(lsp-point-to-position (point))))))
(defun lsp-generalise-applicative ()
"Generalise a monadic function to use applicative"
(interactive)
(lsp--cur-workspace-check)
(lsp--send-execute-command
"hare:genapplicative"
(vector `(:file ,(concat "file://" buffer-file-name)
:pos ,(lsp-point-to-position (point))))))
;; ---------------------------------------------------------------------
(defun lsp-haskell--session-cabal-dir ()
"Get the session cabal-dir."
(let* ((cabal-file (haskell-cabal-find-file))
(cabal-dir (if cabal-file
(file-name-directory cabal-file)
"." ;; no cabal file, use directory only
)))
(progn
(message "cabal-dir: %s" cabal-dir)
cabal-dir)))
(defun lsp-haskell--get-root ()
"TODO: use projectile directory"
(let ((dir (lsp-haskell--session-cabal-dir)))
(if (string= dir "/")
(user-error (concat "Couldn't find cabal file, using:" dir))
dir)))
;; ---------------------------------------------------------------------
;;----------------------------------------------------------------------
;; AZ: Not sure where this section should go, putting it here for now
;; AZ: This section based on/inspired by the intero 'intero-apply-suggestions' code, at
;; https://github.com/commercialhaskell/intero/blob/master/elisp/intero.el
(defun lsp-apply-commands ()
"Prompt and apply any codeAction commands."
(interactive)
(if (null lsp-code-actions)
(message "No actions to apply")
(let ((to-apply
(lsp--intero-multiswitch
(format "There are %d suggestions to apply:" (length lsp-code-actions))
(cl-remove-if-not
#'identity
(mapcar
(lambda (suggestion)
;; (pcase (plist-get suggestion :type)
;; (add-extension
;; (list :key suggestion
;; :title (concat "Add {-# LANGUAGE "
;; (plist-get suggestion :extension)
;; " #-}")
;; :default t))
;; (redundant-constraint
;; (list :key suggestion
;; :title (concat
;; "Remove redundant constraints: "
;; (string-join (plist-get suggestion :redundancies)
;; ", ")
;; "\n from the "
;; (plist-get suggestion :signature))
;; :default nil)))
;; (message "lsp-apply-command:suggestion command=%s" (gethash "command" suggestion))
;; (message "lsp-apply-command:suggestion ommand=args%s" (gethash "arguments" suggestion))
(list :key (gethash "title" suggestion)
:title (gethash "title" suggestion)
:type "codeAction"
:default t
:command suggestion)
)
lsp-code-actions)))))
(if (null to-apply)
(message "No changes selected to apply.")
(let ((sorted (sort to-apply
(lambda (lt gt)
(let ((lt-line (or (plist-get lt :line) 0))
(lt-column (or (plist-get lt :column) 0))
(gt-line (or (plist-get gt :line) 0))
(gt-column (or (plist-get gt :column) 0)))
(or (> lt-line gt-line)
(and (= lt-line gt-line)
(> lt-column gt-column))))))))
;; # Changes unrelated to the buffer
(cl-loop
for suggestion in sorted
do ;; (message "lsp-apply-commands:suggestion=%s" suggestion)
(pcase (plist-get suggestion :type)
(otherwise
(lsp--execute-lsp-server-command suggestion))))
;; # Changes that do not increase/decrease line numbers
;;
;; Update in-place suggestions
;; # Changes that do increase/decrease line numbers
;;
;; Add extensions to the top of the file
)))))
;; The following is copied directly from intero. I suspect it would be better to
;; have it in a dependency somewhere
(defun lsp--intero-multiswitch (title options)
"Displaying TITLE, read multiple flags from a list of OPTIONS.
Each option is a plist of (:key :default :title) wherein:
:key should be something comparable with EQUAL
:title should be a string
:default (boolean) specifies the default checkedness"
(let ((available-width (window-total-width)))
(save-window-excursion
(lsp--intero-with-temp-buffer
(rename-buffer (generate-new-buffer-name "multiswitch"))
(widget-insert (concat title "\n\n"))
(widget-insert (propertize "Hit " 'face 'font-lock-comment-face))
(widget-create 'push-button :notify
(lambda (&rest ignore)
(exit-recursive-edit))
"C-c C-c")
(widget-insert (propertize " to apply these choices.\n\n" 'face 'font-lock-comment-face))
(let* ((me (current-buffer))
(choices (mapcar (lambda (option)
(append option (list :value (plist-get option :default))))
options)))
(cl-loop for option in choices
do (widget-create
'toggle
:notify (lambda (widget &rest ignore)
(setq choices
(mapcar (lambda (choice)
(if (equal (plist-get choice :key)
(plist-get (cdr widget) :key))
(plist-put choice :value (plist-get (cdr widget) :value))
choice))
choices)))
:on (concat "[x] " (plist-get option :title))
:off (concat "[ ] " (plist-get option :title))
:value (plist-get option :default)
:key (plist-get option :key)
:command (plist-get option :command)))
(let ((lines (line-number-at-pos)))
(select-window (split-window-below))
(switch-to-buffer me)
(goto-char (point-min)))
(use-local-map
(let ((map (copy-keymap widget-keymap)))
(define-key map (kbd "C-c C-c") 'exit-recursive-edit)
(define-key map (kbd "C-g") 'abort-recursive-edit)
map))
(widget-setup)
(recursive-edit)
(kill-buffer me)
(mapcar (lambda (choice)
(plist-get choice :command))
(cl-remove-if-not (lambda (choice)
(plist-get choice :value))
choices)))))))
;; The following is copied directly from intero. I suspect it would be better to
;; have it in a dependency somewhere
(defmacro lsp--intero-with-temp-buffer (&rest body)
"Run BODY in `with-temp-buffer', but inherit certain local variables from the current buffer first."
(declare (indent 0) (debug t))
`(let ((initial-buffer (current-buffer)))
(with-temp-buffer
(lsp--intero-inherit-local-variables initial-buffer)
,@body)))
;; The following is copied directly from intero. I suspect it would be better to
;; have it in a dependency somewhere
(defun lsp--intero-inherit-local-variables (buffer)
"Make the current buffer inherit values of certain local variables from BUFFER."
(let ((variables '(
;; TODO: shouldn’t more of the above be here?
)))
(cl-loop for v in variables do
(set (make-local-variable v) (buffer-local-value v buffer)))))
;; ---------------------------------------------------------------------
(lsp-define-stdio-client 'haskell-mode "haskell" 'stdio #'lsp-haskell--get-root
"Haskell Language Server"
'("hie" "--lsp" "-d" "-l" "/tmp/hie.log"))
;; '("lsp-hello"))
(provide 'lsp-haskell)
;;; lsp-haskell.el ends here