flycheck-purescript-pulp.el

;; TODO 
;; - Use temp files so emacs can write the current buffer status to an intermediate save file
;;   and have pulp compile that. This way, flycheck doesn't have to wait until the user
;;   saves the buffer manually, and provide *actual* on-the-fly checking.
;;
;; - Format links to error explanations on purescript wiki nicely.

;; adapted from https://github.com/spion/purscheck/blob/master/purscheck.el
(eval-after-load 'flycheck
  '(progn
     (flycheck-define-checker purescript-pulp
       "Flycheck PureScript code."
       ;; :command ("pulp" "--monochrome" "build" source source-original temporary-file-name)

       ;; ;; compiles the SOURCE FILE instead of the project, and with the src dir as cwd
       ;; :command ("pulp" "--monochrome" "build" source-inplace)

       ;; :command ("/opt/purescript/psc" source-inplace)

       :command ("pulp" "--monochrome" "build")

       :error-patterns
       ((error line-start
               (or (and (zero-or-more " ") "Error at " (file-name)    " line " line ", column " column (zero-or-more " ") (or ":" "-") (zero-or-more not-newline))
                   (and "\""        (file-name) "\" (line " line ", column " column "):"))
               (or (message (one-or-more not-newline))
                   (and (or "\r" "\n" "\r\n")
                        (message
                         (zero-or-more " ") (one-or-more not-newline)
                         (zero-or-more (or "\r" "\n")
                                       (zero-or-more " ")
                                       (one-or-more not-newline)))))
               line-end))
       :modes purescript-mode)
     (add-to-list 'flycheck-checkers 'purescript-pulp)))