(require 'flymake)

(defvar ghc-flymake-allowed-file-name-masks
  '("\\.l?hs$" ghc-flymake-init flymake-simple-cleanup flymake-get-real-file-name))

(defvar ghc-flymake-err-line-patterns
  '("^\\(.*\\.l?hs\\):\\([0-9]+\\):\\([0-9]+\\):\\(.+\\)" 1 2 3 4))

(add-to-list 'flymake-allowed-file-name-masks
	     ghc-flymake-allowed-file-name-masks)

(add-to-list 'flymake-err-line-patterns
	     ghc-flymake-err-line-patterns)

(defun ghc-flymake-init ()
  (let* ((temp-file (flymake-init-create-temp-buffer-copy
                     'flymake-create-temp-inplace))
         (local-file (file-relative-name
                      temp-file
                      (file-name-directory buffer-file-name))))
    (list "ghc-mod" (append (ghc-module-command-args)
			    (list "check" local-file)))))

(provide 'ghc-flymake)