;;; haskell-compile.el --- Haskell/GHC compilation sub-mode -*- lexical-binding: t -*- ;; Copyright (C) 2013 Herbert Valerio Riedel ;; Author: Herbert Valerio Riedel ;; This file is not part of GNU Emacs. ;; This file is free software; you can redistribute it and/or modify ;; it under the terms of the GNU General Public License as published by ;; the Free Software Foundation; either version 3 of the License, or ;; (at your option) any later version. ;; This file is distributed in the hope that it will be useful, ;; but WITHOUT ANY WARRANTY; without even the implied warranty of ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ;; GNU General Public License for more details. ;; You should have received a copy of the GNU General Public License ;; along with this program. If not, see . ;;; Commentary: ;; Simple GHC-centric compilation sub-mode; see info node ;; `(haskell-mode)compilation' for more information ;;; Code: (require 'compile) (require 'haskell-cabal) ;;;###autoload (defgroup haskell-compile nil "Settings for Haskell compilation mode" :link '(custom-manual "(haskell-mode)compilation") :group 'haskell) (defcustom haskell-compile-cabal-build-command "cd %s && cabal build --ghc-option=-ferror-spans" "Default build command to use for `haskell-cabal-build' when a cabal file is detected. The `%s' placeholder is replaced by the cabal package top folder." :group 'haskell-compile :type 'string) (defcustom haskell-compile-cabal-build-alt-command "cd %s && cabal clean -s && cabal build --ghc-option=-ferror-spans" "Alternative build command to use when `haskell-cabal-build' is called with a negative prefix argument. The `%s' placeholder is replaced by the cabal package top folder." :group 'haskell-compile :type 'string) (defcustom haskell-compile-command "ghc -Wall -ferror-spans -fforce-recomp -c %s" "Default build command to use for `haskell-cabal-build' when no cabal file is detected. The `%s' placeholder is replaced by the current buffer's filename." :group 'haskell-compile :type 'string) (defcustom haskell-compile-ghc-filter-linker-messages t "Filter out unremarkable \"Loading package...\" linker messages during compilation." :group 'haskell-compile :type 'boolean) (defconst haskell-compilation-error-regexp-alist `((,(concat "^ *\\(?1:[^\t\r\n]+?\\):" "\\(?:" "\\(?2:[0-9]+\\):\\(?4:[0-9]+\\)\\(?:-\\(?5:[0-9]+\\)\\)?" ;; "121:1" & "12:3-5" "\\|" "(\\(?2:[0-9]+\\),\\(?4:[0-9]+\\))-(\\(?3:[0-9]+\\),\\(?5:[0-9]+\\))" ;; "(289,5)-(291,36)" "\\)" ":\\(?6:\n?[ \t]+[Ww]arning:\\)?") 1 (2 . 3) (4 . 5) (6 . nil)) ;; error/warning locus ;; multiple declarations ("^ \\(?:Declared at:\\| \\) \\(?1:[^ \t\r\n]+\\):\\(?2:[0-9]+\\):\\(?4:[0-9]+\\)$" 1 2 4 0) ;; info locus ;; this is the weakest pattern as it's subject to line wrapping et al. (" at \\(?1:[^ \t\r\n]+\\):\\(?2:[0-9]+\\):\\(?4:[0-9]+\\)\\(?:-\\(?5:[0-9]+\\)\\)?[)]?$" 1 2 (4 . 5) 0)) ;; info locus "Regexps used for matching GHC compile messages. See `compilation-error-regexp-alist' for semantics.") (defvar haskell-compilation-mode-map (let ((map (make-sparse-keymap))) (set-keymap-parent map compilation-mode-map)) "Keymap for `haskell-compilation-mode' buffers. This is a child of `compilation-mode-map'.") (defun haskell-compilation-filter-hook () "Local `compilation-filter-hook' for `haskell-compilation-mode'." (when haskell-compile-ghc-filter-linker-messages (delete-matching-lines "^ *Loading package [^ \t\r\n]+ [.]+ linking [.]+ done\\.$" (save-excursion (goto-char compilation-filter-start) (line-beginning-position)) (point)))) (define-compilation-mode haskell-compilation-mode "HsCompilation" "Haskell/GHC specific `compilation-mode' derivative. This mode provides support for GHC 7.[46]'s compile messages. Specifically, also the `-ferror-spans` source location format is supported, as well as info-locations within compile messages pointing to additional source locations." (setq-local compilation-error-regexp-alist haskell-compilation-error-regexp-alist) (add-hook 'compilation-filter-hook 'haskell-compilation-filter-hook nil t) ) ;;;###autoload (defun haskell-compile (&optional edit-command) "Compile the Haskell program including the current buffer. Tries to locate the next cabal description in current or parent folders via `haskell-cabal-find-dir' and if found, invoke `haskell-compile-cabal-build-command' from the cabal package root folder. If no cabal package could be detected, `haskell-compile-command' is used instead. If prefix argument EDIT-COMMAND is non-nil (and not a negative prefix `-'), `haskell-compile' prompts for custom compile command. If EDIT-COMMAND contains the negative prefix argument `-', `haskell-compile' calls the alternative command defined in `haskell-compile-cabal-build-alt-command' if a cabal package was detected. `haskell-compile' uses `haskell-compilation-mode' which is derived from `compilation-mode'. See Info node `(haskell-mode)compilation' for more details." (interactive "P") (save-some-buffers (not compilation-ask-about-save) compilation-save-buffers-predicate) (let* ((cabdir (haskell-cabal-find-dir)) (command1 (if (eq edit-command '-) haskell-compile-cabal-build-alt-command haskell-compile-cabal-build-command)) (srcname (buffer-file-name)) (command (if cabdir (format command1 cabdir) (if (and srcname (derived-mode-p 'haskell-mode)) (format haskell-compile-command srcname) command1)))) (when (and edit-command (not (eq edit-command '-))) (setq command (compilation-read-command command))) (compilation-start command 'haskell-compilation-mode))) (provide 'haskell-compile) ;;; haskell-compile.el ends here