289 lines
9.1 KiB
EmacsLisp
289 lines
9.1 KiB
EmacsLisp
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;;
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;;; ghc-check.el
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;;;
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;; Author: Kazu Yamamoto <Kazu@Mew.org>
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;; Created: Mar 9, 2014
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;;; Code:
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(require 'ghc-func)
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(require 'ghc-process)
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; stolen from flymake.el
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(defface ghc-face-error
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'((((supports :underline (:style wave)))
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:underline (:style wave :color "orangered"))
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(t
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:inherit error))
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"Face used for marking error lines."
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:group 'ghc)
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(defface ghc-face-warn
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'((((supports :underline (:style wave)))
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:underline (:style wave :color "gold"))
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(t
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:inherit warning))
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"Face used for marking warning lines."
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:group 'ghc)
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(defvar ghc-check-error-fringe (propertize "!" 'display '(left-fringe exclamation-mark)))
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(defvar ghc-check-warning-fringe (propertize "?" 'display '(left-fringe question-mark)))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(defun ghc-check-syntax ()
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(interactive)
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(ghc-with-process 'ghc-check-send 'ghc-check-callback))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(ghc-defstruct hilit-info file line msg err)
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(defun ghc-check-send ()
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(with-current-buffer ghc-process-original-buffer
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(setq mode-line-process " -:-"))
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(if ghc-check-command
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(let ((opts (ghc-haskell-list-of-string ghc-hlint-options)))
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(if opts
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(concat "lint " opts " " ghc-process-original-file "\n")
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(concat "lint " ghc-process-original-file "\n")))
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(concat "check " ghc-process-original-file "\n")))
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(defun ghc-haskell-list-of-string (los)
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(when los
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(concat "["
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(mapconcat (lambda (x) (concat "\"" x "\"")) los ", ")
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"]")))
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(defun ghc-check-callback ()
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(let ((regex "^\\([^\n\0]*\\):\\([0-9]+\\):\\([0-9]+\\): *\\(.+\\)")
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info infos)
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(while (re-search-forward regex nil t)
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(let* ((file (match-string 1))
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(line (string-to-number (match-string 2)))
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;; don't take column to make multiple same errors to a single.
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(msg (match-string 4))
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(err (not (string-match "^Warning" msg)))
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(info (ghc-make-hilit-info
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:file file
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:line line
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:msg msg
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:err err)))
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(unless (member info infos)
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(setq infos (cons info infos)))))
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(setq infos (nreverse infos))
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(cond
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(infos
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(let ((file ghc-process-original-file)
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(buf ghc-process-original-buffer))
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(ghc-check-highlight-original-buffer file buf infos)))
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(t
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(with-current-buffer ghc-process-original-buffer
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(remove-overlays (point-min) (point-max) 'ghc-check t))))
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(with-current-buffer ghc-process-original-buffer
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(let ((len (length infos)))
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(if (= len 0)
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(setq mode-line-process "")
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(let* ((errs (ghc-filter 'ghc-hilit-info-get-err infos))
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(elen (length errs))
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(wlen (- len elen)))
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(setq mode-line-process (format " %d:%d" elen wlen))))))))
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(defun ghc-check-highlight-original-buffer (ofile buf infos)
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(with-current-buffer buf
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(remove-overlays (point-min) (point-max) 'ghc-check t)
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(save-excursion
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(goto-char (point-min))
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(dolist (info infos)
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(let ((line (ghc-hilit-info-get-line info))
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(msg (ghc-hilit-info-get-msg info))
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(file (ghc-hilit-info-get-file info))
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(err (ghc-hilit-info-get-err info))
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beg end ovl)
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;; FIXME: This is the Shlemiel painter's algorithm.
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;; If this is a bottleneck for a large code, let's fix.
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(goto-char (point-min))
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(cond
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((string= ofile file)
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(forward-line (1- line))
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(while (eq (char-after) 32) (forward-char))
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(setq beg (point))
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(forward-line)
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(setq end (1- (point))))
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(t
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(setq beg (point))
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(forward-line)
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(setq end (point))))
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(setq ovl (make-overlay beg end))
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(overlay-put ovl 'ghc-check t)
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(overlay-put ovl 'ghc-file file)
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(overlay-put ovl 'ghc-msg msg)
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(let ((echo (ghc-replace-character msg ?\0 ?\n)))
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(overlay-put ovl 'help-echo echo))
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(let ((fringe (if err ghc-check-error-fringe ghc-check-warning-fringe))
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(face (if err 'ghc-face-error 'ghc-face-warn)))
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(overlay-put ovl 'before-string fringe)
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(overlay-put ovl 'face face)))))))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(defun ghc-display-errors ()
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(interactive)
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(let* ((ovls (ghc-check-overlay-at (point)))
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(errs (mapcar (lambda (ovl) (overlay-get ovl 'ghc-msg)) ovls)))
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(if (null ovls)
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(message "No errors or warnings")
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(ghc-display
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nil
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(lambda ()
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(insert (overlay-get (car ovls) 'ghc-file) "\n\n")
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(mapc (lambda (x) (insert x "\n\n")) errs))))))
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(defun ghc-check-overlay-at (p)
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(let ((ovls (overlays-at p)))
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(ghc-filter (lambda (ovl) (overlay-get ovl 'ghc-check)) ovls)))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(defun ghc-goto-prev-error ()
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(interactive)
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(let* ((here (point))
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(ovls0 (ghc-check-overlay-at here))
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(end (if ovls0 (overlay-start (car ovls0)) here))
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(ovls1 (overlays-in (point-min) end))
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(ovls2 (ghc-filter (lambda (ovl) (overlay-get ovl 'ghc-check)) ovls1))
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(pnts (mapcar 'overlay-start ovls2)))
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(if pnts (goto-char (apply 'max pnts)))))
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(defun ghc-goto-next-error ()
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(interactive)
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(let* ((here (point))
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(ovls0 (ghc-check-overlay-at here))
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(beg (if ovls0 (overlay-end (car ovls0)) here))
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(ovls1 (overlays-in beg (point-max)))
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(ovls2 (ghc-filter (lambda (ovl) (overlay-get ovl 'ghc-check)) ovls1))
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(pnts (mapcar 'overlay-start ovls2)))
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(if pnts (goto-char (apply 'min pnts)))))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(defun ghc-check-insert-from-warning ()
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(interactive)
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(dolist (data (mapcar (lambda (ovl) (overlay-get ovl 'ghc-msg)) (ghc-check-overlay-at (point))))
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(save-excursion
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(cond
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((string-match "Inferred type: \\|no type signature:" data)
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(beginning-of-line)
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(insert-before-markers (ghc-extract-type data) "\n"))
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((string-match "lacks an accompanying binding" data)
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(beginning-of-line)
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(when (looking-at "^\\([^ ]+\\) *::")
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(save-match-data
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(forward-line)
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(if (not (bolp)) (insert "\n")))
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(insert (match-string 1) " = undefined\n")))
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;; GHC 7.8 uses Unicode for single-quotes.
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((string-match "Not in scope: type constructor or class `\\([^'\n\0]+\\)'" data)
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(let ((sym (match-string 1 data)))
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(ghc-ins-mod sym)))
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((string-match "Not in scope: `\\([^'\n\0]+\\)'" data)
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(let ((sym (match-string 1 data)))
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(if (or (string-match "\\." sym) ;; qualified
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(y-or-n-p (format "Import module for %s?" sym)))
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(ghc-ins-mod sym)
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(unless (re-search-forward "^$" nil t)
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(goto-char (point-max))
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(insert "\n"))
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(insert "\n" (ghc-enclose sym) " = undefined\n"))))
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((string-match "Pattern match(es) are non-exhaustive" data)
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(let* ((fn (ghc-get-function-name))
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(arity (ghc-get-function-arity fn)))
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(ghc-insert-underscore fn arity)))
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((string-match "Found:\0[ ]*\\([^\0]+\\)\0Why not:\0[ ]*\\([^\0]+\\)" data)
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(let ((old (match-string 1 data))
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(new (match-string 2 data)))
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(beginning-of-line)
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(when (search-forward old nil t)
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(let ((end (point)))
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(search-backward old nil t)
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(delete-region (point) end))
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(insert new))))
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(t
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(message "Nothing was done"))))))
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(defun ghc-extract-type (str)
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(with-temp-buffer
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(insert str)
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(goto-char (point-min))
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(when (re-search-forward "Inferred type: \\|no type signature:\\( \\|\0 +\\)?" nil t)
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(delete-region (point-min) (point)))
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(when (re-search-forward " forall [^.]+\\." nil t)
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(replace-match ""))
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(while (re-search-forward "\0 +" nil t)
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(replace-match " "))
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(goto-char (point-min))
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(while (re-search-forward "\\[Char\\]" nil t)
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(replace-match "String"))
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(buffer-substring-no-properties (point-min) (point-max))))
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(defun ghc-get-function-name ()
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(save-excursion
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(beginning-of-line)
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(when (looking-at "\\([^ ]+\\) ")
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(match-string 1))))
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(defun ghc-get-function-arity (fn)
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(when fn
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(save-excursion
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(let ((regex (format "^%s *::" (regexp-quote fn))))
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(when (re-search-backward regex nil t)
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(ghc-get-function-arity0))))))
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(defun ghc-get-function-arity0 ()
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(let ((end (save-excursion (end-of-line) (point)))
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(arity 0))
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(while (search-forward "->" end t)
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(setq arity (1+ arity)))
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arity))
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(defun ghc-insert-underscore (fn ar)
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(when fn
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(let ((arity (or ar 1)))
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(save-excursion
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(goto-char (point-max))
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(re-search-backward (format "^%s *::" (regexp-quote fn)))
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(forward-line)
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(re-search-forward "^$" nil t)
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(insert fn)
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(dotimes (i arity)
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(insert " _"))
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(insert " = error \"" fn "\"")))))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(defun ghc-jump-file ()
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(interactive)
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(let* ((ovl (car (ghc-check-overlay-at 1)))
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(file (if ovl (overlay-get ovl 'ghc-file))))
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(if file (find-file file))))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(defvar ghc-hlint-options nil "*Hlint options")
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(defvar ghc-check-command nil)
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(defun ghc-toggle-check-command ()
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(interactive)
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(setq ghc-check-command (not ghc-check-command))
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(if ghc-check-command
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(message "Syntax check with hlint")
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(message "Syntax check with GHC")))
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(provide 'ghc-check)
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