494 lines
16 KiB
EmacsLisp
494 lines
16 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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(require 'button)
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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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(defface ghc-face-hole
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'((((supports :underline (:style wave)))
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:underline (:style wave :color "purple"))
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(t
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:inherit warning))
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"Face used for marking hole 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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(defvar ghc-check-hole-fringe (propertize "_" 'display '(left-fringe horizontal-bar)))
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(defvar ghc-display-error nil
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"*An action to display errors/warnings for 'M-n' and 'M-p:
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nil does not display errors/warnings.
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'minibuffer displays errors/warnings in the minibuffer.
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'other-buffer displays errors/warnings in the other buffer.
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")
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(defvar ghc-display-hole 'other-buffer
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"*An action to display hole information for 'C-c C-j' and 'C-c C-h'
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'minibuffer displays errors/warnings in the minibuffer.
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'other-buffer displays errors/warnings in the other buffer"
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)
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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)
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'ghc-check-callback
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(lambda () (setq mode-line-process " -:-"))))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(ghc-defstruct hilit-info file line msg err hole coln)
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(defun ghc-check-send ()
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(let ((file (buffer-file-name)))
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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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(format "lint %s %s\n" opts file)
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(format "lint %s\n" file)))
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(format "check %s\n" file))))
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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 (status)
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(cond
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((eq status 'ok)
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(let* ((errs (ghc-read-lisp-this-buffer))
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(infos (ghc-to-info errs)))
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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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(ghc-with-current-buffer ghc-process-original-buffer
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(remove-overlays (point-min) (point-max) 'ghc-check t))))
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(ghc-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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(force-mode-line-update))))
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(t
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(let* ((err (ghc-unescape-string (buffer-substring-no-properties (+ (point) 3) (point-max))))
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(info (ghc-make-hilit-info
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:file "Fail errors:"
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:line 0
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:coln 0
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:msg err
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:err t
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:hole nil))
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(infos (list info))
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(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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(ghc-with-current-buffer ghc-process-original-buffer
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(setq mode-line-process " failed")
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(force-mode-line-update)))))
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(defun ghc-to-info (errs)
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;; [^\t] to include \n.
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(let ((regex "^\\([^\n]*\\):\\([0-9]+\\):\\([0-9]+\\): *\\([^\t]+\\)")
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info infos)
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(dolist (err errs (nreverse infos))
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(when (string-match regex err)
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(let* ((file (expand-file-name (match-string 1 err))) ;; for Windows
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(line (string-to-number (match-string 2 err)))
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(coln (string-to-number (match-string 3 err)))
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(msg (match-string 4 err))
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(wrn (string-match "^Warning" msg))
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(hole (save-match-data
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(when (string-match "Found hole .\\(_[_[:alnum:]]*\\)." msg)
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(match-string 1 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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:coln coln
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:msg msg
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:err (and (not wrn) (not hole))
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:hole hole)))
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(unless (member info infos)
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(ghc-add infos info)))))))
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(defun ghc-check-highlight-original-buffer (ofile buf infos)
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(ghc-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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(hole (ghc-hilit-info-get-hole info))
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(coln (ghc-hilit-info-get-coln 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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((and (string= ofile file) hole)
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(forward-line (1- line))
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(forward-char (1- coln))
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(setq beg (point))
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(forward-char (length hole))
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(setq end (point)))
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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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(overlay-put ovl 'help-echo msg)
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(overlay-put ovl 'ghc-hole hole)
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(let ((fringe (if err ghc-check-error-fringe (if hole ghc-check-hole-fringe ghc-check-warning-fringe)))
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(face (if err 'ghc-face-error (if hole 'ghc-face-hole '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-overlay-p (ovl)
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(overlay-get ovl 'ghc-check))
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(defun ghc-check-overlay-at (p)
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(ghc-filter 'ghc-overlay-p (overlays-at p)))
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(ghc-defstruct file-msgs file msgs)
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(defun ghc-get-errors-over-warnings ()
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(let ((ovls (ghc-check-overlay-at (point))))
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(when ovls
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(let ((msgs (mapcar (lambda (ovl) (overlay-get ovl 'ghc-msg)) ovls))
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(file (overlay-get (car ovls) 'ghc-file))
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errs wrns)
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(dolist (msg msgs)
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(if (string-match "^Warning" msg)
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(ghc-add wrns msg)
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(ghc-add errs msg)))
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(ghc-make-file-msgs :file file :msgs (nconc errs wrns))))))
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(defun ghc-display-errors ()
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(interactive)
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(let ((file-msgs (ghc-get-errors-over-warnings)))
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(if (null file-msgs)
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(message "No errors or warnings")
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(let ((file (ghc-file-msgs-get-file file-msgs))
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(msgs (ghc-file-msgs-get-msgs file-msgs)))
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(ghc-display
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nil
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(lambda ()
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(insert file "\n\n")
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(mapc (lambda (x) (insert x "\n\n")) msgs)))))))
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(defun ghc-display-errors-to-minibuf ()
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(let ((file-msgs (ghc-get-errors-over-warnings)))
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(if (null file-msgs)
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(message "No errors or warnings")
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(let* ((file (ghc-file-msgs-get-file file-msgs))
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(msgs (ghc-file-msgs-get-msgs file-msgs))
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(errmsg (mapconcat 'identity msgs "\n"))
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(buffile buffer-file-name))
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(if (string-equal buffile file)
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(message "%s" errmsg)
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(message "%s\n\n%s" file errmsg))))))
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(defun ghc-get-only-holes ()
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(let ((ovls (ghc-check-overlay-at (point))))
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(when ovls
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(let ((msgs (mapcar (lambda (ovl) (overlay-get ovl 'ghc-msg)) ovls))
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(file (overlay-get (car ovls) 'ghc-file))
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holes)
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(dolist (msg msgs)
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(if (string-match "Found hole" msg)
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(ghc-add holes msg)
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nil))
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(ghc-make-file-msgs :file file :msgs holes)))))
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;; Based on http://superuser.com/questions/331895/how-to-get-emacs-to-highlight-and-link-file-paths
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(defun find-file-button (button)
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(let ((text (buffer-substring (button-start button) (button-end button))))
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(when (string-match "\\(/[^:]*\\):\\([[:digit:]]+\\):\\([[:digit:]]+\\)" text)
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(let* ((file (match-string 1 text))
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(line (string-to-number (match-string 2 text)))
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(coln (string-to-number (match-string 3 text)))
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(buf (find-file file)))
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(with-current-buffer buf
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(let* ((this-line (line-number-at-pos))
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(diff (- line this-line)))
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(beginning-of-line)
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(forward-line diff)
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(forward-char (1- coln))))))))
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(define-button-type 'find-file-button
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'follow-link t
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'help-echo "mouse-2, RET: Go to definition"
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'action #'find-file-button)
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(defun buttonize-buffer ()
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"turn all file paths into buttons"
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(save-excursion
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(goto-char (point-min))
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(while (re-search-forward "/[^ \t:]*:[[:digit:]]+:[[:digit:]]+" nil t)
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(make-button (match-beginning 0) (match-end 0) :type 'find-file-button))))
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(defun ghc-display-holes ()
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(interactive)
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(let ((file-msgs (ghc-get-only-holes)))
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(if (null file-msgs)
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(message "No holes")
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(let ((file (ghc-file-msgs-get-file file-msgs))
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(msgs (ghc-file-msgs-get-msgs file-msgs)))
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(ghc-display
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nil
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(lambda ()
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(progn
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(mapc (lambda (x) (insert x "\n\n")) msgs)
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(buttonize-buffer)) ))))))
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(defun ghc-display-holes-to-minibuf ()
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(let ((file-msgs (ghc-get-only-holes)))
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(if (null file-msgs)
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(message "No holes")
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(let* ((file (ghc-file-msgs-get-file file-msgs))
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(msgs (ghc-file-msgs-get-msgs file-msgs))
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(errmsg (mapconcat 'identity msgs "\n"))
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(buffile buffer-file-name))
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(if (string-equal buffile file)
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(message "%s" errmsg)
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(message "%s\n\n%s" file errmsg))))))
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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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(cond
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((eq ghc-display-error 'minibuffer) (ghc-display-errors-to-minibuf))
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((eq ghc-display-error 'other-buffer) (ghc-display-errors))))
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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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(cond
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((eq ghc-display-error 'minibuffer) (ghc-display-errors-to-minibuf))
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((eq ghc-display-error 'other-buffer) (ghc-display-errors))))
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(defun ghc-goto-prev-hole ()
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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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(ovls3 (ghc-filter (lambda (ovl) (overlay-get ovl 'ghc-hole)) ovls2))
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(pnts (mapcar 'overlay-start ovls3)))
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(if pnts (goto-char (apply 'max pnts))))
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(cond
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((eq ghc-display-hole 'minibuffer) (ghc-display-holes-to-minibuf))
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((eq ghc-display-hole 'other-buffer) (ghc-display-holes))))
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(defun ghc-goto-next-hole ()
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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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(ovls3 (ghc-filter (lambda (ovl) (overlay-get ovl 'ghc-hole)) ovls2))
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(pnts (mapcar 'overlay-start ovls3)))
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(if pnts (goto-char (apply 'min pnts))))
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(cond
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((eq ghc-display-hole 'minibuffer) (ghc-display-holes-to-minibuf))
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((eq ghc-display-hole 'other-buffer) (ghc-display-holes))))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(defun ghc-check-insert-from-warning ()
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(interactive)
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(let ((ret t))
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(dolist (data (delete-dups (mapcar (lambda (ovl) (overlay-get ovl 'ghc-msg)) (ghc-check-overlay-at (point)))) ret)
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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]+\\)." 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: data constructor .\\([^\n]+\\)." data)
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;; if the type of data constructor, it would be nice.
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(let ((sym (match-string 1 data)))
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(ghc-ins-mod sym)))
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((string-match "\n[ ]+.\\([^ ]+\\). is a data constructor of .\\([^\n]+\\).\n" data)
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(let* ((old (match-string 1 data))
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(type-const (match-string 2 data))
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(new (format "%s(%s)" type-const old)))
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(ghc-check-replace old new)))
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((string-match "Not in scope: .\\([^\n]+\\)." 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:\n[ ]+\\([^\t]+\\)\nWhy not:\n[ ]+\\([^\t]+\\)" data)
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(let ((old (match-string 1 data))
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(new (match-string 2 data)))
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(ghc-check-replace old new)))
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(t
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(setq ret nil)))))))
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(defun ghc-check-replace (old new)
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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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(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:\\( \\|\n +\\)?" nil t)
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(delete-region (point-min) (point)))
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(when (re-search-forward " forall [^.]+\\." nil t)
|
|
(replace-match ""))
|
|
(while (re-search-forward "\n +" nil t)
|
|
(replace-match " "))
|
|
(goto-char (point-min))
|
|
(while (re-search-forward "\\[Char\\]" nil t)
|
|
(replace-match "String"))
|
|
(buffer-substring-no-properties (point-min) (point-max))))
|
|
|
|
(defun ghc-get-function-name ()
|
|
(save-excursion
|
|
(beginning-of-line)
|
|
(when (looking-at "\\([^ ]+\\) ")
|
|
(match-string 1))))
|
|
|
|
(defun ghc-get-function-arity (fn)
|
|
(when fn
|
|
(save-excursion
|
|
(let ((regex (format "^%s *::" (regexp-quote fn))))
|
|
(when (re-search-backward regex nil t)
|
|
(ghc-get-function-arity0))))))
|
|
|
|
(defun ghc-get-function-arity0 ()
|
|
(let ((end (save-excursion (end-of-line) (point)))
|
|
(arity 0))
|
|
(while (search-forward "->" end t)
|
|
(setq arity (1+ arity)))
|
|
arity))
|
|
|
|
(defun ghc-insert-underscore (fn ar)
|
|
(when fn
|
|
(let ((arity (or ar 1)))
|
|
(save-excursion
|
|
(goto-char (point-max))
|
|
(re-search-backward (format "^%s *::" (regexp-quote fn)))
|
|
(forward-line)
|
|
(re-search-forward "^$" nil t)
|
|
(insert fn)
|
|
(dotimes (i arity)
|
|
(insert " _"))
|
|
(insert " = error \"" fn "\"\n")))))
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
(defun ghc-jump-file ()
|
|
(interactive)
|
|
(let* ((ovl (car (ghc-check-overlay-at 1)))
|
|
(file (if ovl (overlay-get ovl 'ghc-file))))
|
|
(if file (find-file file))))
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
(defvar ghc-hlint-options nil "*Hlint options")
|
|
|
|
(defvar ghc-check-command nil)
|
|
|
|
(defun ghc-toggle-check-command ()
|
|
(interactive)
|
|
(setq ghc-check-command (not ghc-check-command))
|
|
(if ghc-check-command
|
|
(message "Syntax check with hlint")
|
|
(message "Syntax check with GHC")))
|
|
|
|
(provide 'ghc-check)
|