ghc-mod/elisp/ghc-process.el

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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; ghc-process.el
;;;
;; Author: Kazu Yamamoto <Kazu@Mew.org>
;; Created: Mar 9, 2014
;;; Code:
(require 'ghc-func)
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(defvar-local ghc-process-running nil)
(defvar-local ghc-process-process-name nil)
(defvar-local ghc-process-original-buffer nil)
(defvar-local ghc-process-original-file nil)
(defvar-local ghc-process-callback nil)
(defvar ghc-interactive-command "ghc-modi")
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(defun ghc-get-project-root ()
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(let ((file (buffer-file-name)))
(with-temp-buffer
(ghc-call-process ghc-module-command nil t nil "root" file)
(goto-char (point-min))
(when (looking-at "^\\(.*\\)$")
(match-string-no-properties 1)))))
(defun ghc-with-process (send callback)
(unless ghc-process-process-name
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(setq ghc-process-process-name (ghc-get-project-root)))
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(when ghc-process-process-name
(let* ((cbuf (current-buffer))
(name ghc-process-process-name)
(buf (get-buffer-create (concat " ghc-modi:" name)))
(file (buffer-file-name))
(cpro (get-process name)))
(with-current-buffer buf
(unless ghc-process-running
(setq ghc-process-running t)
(setq ghc-process-original-buffer cbuf)
(setq ghc-process-original-file file)
(setq ghc-process-callback callback)
(erase-buffer)
(let ((pro (ghc-get-process cpro name buf)))
(process-send-string pro (funcall send))))))))
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(defun ghc-get-process (cpro name buf)
(cond
((not cpro)
(ghc-start-process name buf))
((not (eq (process-status cpro) 'run))
(delete-process cpro)
(ghc-start-process name buf))
(t cpro)))
(defun ghc-start-process (name buf)
(let ((pro (start-file-process name buf ghc-interactive-command)))
(set-process-filter pro 'ghc-process-filter)
(set-process-query-on-exit-flag pro nil)
pro))
(defun ghc-process-filter (process string)
(with-current-buffer (process-buffer process)
(goto-char (point-max))
(insert string)
(forward-line -1)
(when (looking-at "^\\(OK\\|NG\\)$")
(goto-char (point-min))
(funcall ghc-process-callback)
(setq ghc-process-running nil))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(provide 'ghc-process)