/vendor/haskell-mode/haskell-cabal.el
http://github.com/rejeep/emacs · Emacs Lisp · 183 lines · 87 code · 28 blank · 68 comment · 1 complexity · a4ed4316e6c8346d104682c32ac81437 MD5 · raw file
- ;;; haskell-cabal.el --- Support for Cabal packages
- ;; Copyright (C) 2007, 2008 Stefan Monnier
- ;; Author: Stefan Monnier <monnier@iro.umontreal.ca>
- ;; 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, 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 GNU Emacs; see the file COPYING. If not, write to
- ;; the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
- ;; Boston, MA 02110-1301, USA.
- ;;; Commentary:
- ;; Todo:
- ;; - distinguish continued lines from indented lines.
- ;; - indent-line-function.
- ;; - outline-minor-mode.
- ;;; Code:
- ;; (defun haskell-cabal-extract-fields-from-doc ()
- ;; (require 'xml)
- ;; (require 'cl)
- ;; (let ((section (completing-read
- ;; "Section: "
- ;; '("general-fields" "library" "executable" "buildinfo"))))
- ;; (goto-char (point-min))
- ;; (search-forward (concat "<sect3 id=\"" section "\">")))
- ;; (let* ((xml (xml-parse-region
- ;; (progn (search-forward "<variablelist>") (match-beginning 0))
- ;; (progn (search-forward "</variablelist>") (point))))
- ;; (varlist (remove-if-not 'consp (cddar xml)))
- ;; (syms (mapcar (lambda (entry) (caddr (assq 'literal (assq 'term entry))))
- ;; varlist))
- ;; (fields (mapcar (lambda (sym) (substring-no-properties sym 0 -1)) syms)))
- ;; fields))
- (eval-when-compile (require 'cl))
- (defconst haskell-cabal-general-fields
- ;; Extracted with (haskell-cabal-extract-fields-from-doc "general-fields")
- '("name" "version" "cabal-version" "license" "license-file" "copyright"
- "author" "maintainer" "stability" "homepage" "package-url" "synopsis"
- "description" "category" "tested-with" "build-depends" "data-files"
- "extra-source-files" "extra-tmp-files"))
- (defconst haskell-cabal-library-fields
- ;; Extracted with (haskell-cabal-extract-fields-from-doc "library")
- '("exposed-modules"))
- (defconst haskell-cabal-executable-fields
- ;; Extracted with (haskell-cabal-extract-fields-from-doc "executable")
- '("executable" "main-is"))
- (defconst haskell-cabal-buildinfo-fields
- ;; Extracted with (haskell-cabal-extract-fields-from-doc "buildinfo")
- '("buildable" "other-modules" "hs-source-dirs" "extensions" "ghc-options"
- "ghc-prof-options" "hugs-options" "nhc-options" "includes"
- "install-includes" "include-dirs" "c-sources" "extra-libraries"
- "extra-lib-dirs" "cc-options" "ld-options" "frameworks"))
- (defvar haskell-cabal-mode-syntax-table
- (let ((st (make-syntax-table)))
- ;; The comment syntax can't be described simply in syntax-table.
- ;; We could use font-lock-syntactic-keywords, but is it worth it?
- ;; (modify-syntax-entry ?- ". 12" st)
- (modify-syntax-entry ?\n ">" st)
- st))
- (defvar haskell-cabal-font-lock-keywords
- ;; The comment syntax can't be described simply in syntax-table.
- ;; We could use font-lock-syntactic-keywords, but is it worth it?
- '(("^[ \t]*--.*" . font-lock-comment-face)
- ("^ *\\([^ \t:]+\\):" (1 font-lock-keyword-face))
- ("^\\(Library\\)[ \t]*\\({\\|$\\)" (1 font-lock-keyword-face))
- ("^\\(Executable\\)[ \t]+\\([^\n \t]*\\)"
- (1 font-lock-keyword-face) (2 font-lock-function-name-face))
- ("^\\(Flag\\)[ \t]+\\([^\n \t]*\\)"
- (1 font-lock-keyword-face) (2 font-lock-constant-face))
- ("^ *\\(if\\)[ \t]+.*\\({\\|$\\)" (1 font-lock-keyword-face))
- ("^ *\\(}[ \t]*\\)?\\(else\\)[ \t]*\\({\\|$\\)"
- (2 font-lock-keyword-face))))
- (defvar haskell-cabal-buffers nil
- "List of Cabal buffers.")
- ;; (defsubst* inferior-haskell-string-prefix-p (str1 str2)
- ;; "Return non-nil if STR1 is a prefix of STR2"
- ;; (eq t (compare-strings str2 nil (length str1) str1 nil nil)))
- (defun haskell-cabal-find-file ()
- "Return a buffer visiting the cabal file of the current directory, or nil."
- (catch 'found
- ;; ;; First look for it in haskell-cabal-buffers.
- ;; (dolist (buf haskell-cabal-buffers)
- ;; (if (inferior-haskell-string-prefix-p
- ;; (with-current-buffer buf default-directory) default-directory)
- ;; (throw 'found buf)))
- ;; Then look up the directory hierarchy.
- (let ((user (nth 2 (file-attributes default-directory)))
- ;; Abbreviate, so as to stop when we cross ~/.
- (root (abbreviate-file-name default-directory))
- files)
- (while (and root (equal user (nth 2 (file-attributes root))))
- (if (setq files (directory-files root 'full "\\.cabal\\'"))
- ;; Avoid the .cabal directory.
- (dolist (file files (throw 'found nil))
- (unless (file-directory-p file)
- (throw 'found (find-file-noselect file))))
- (if (equal root
- (setq root (file-name-directory
- (directory-file-name root))))
- (setq root nil))))
- nil)))
- (autoload 'derived-mode-p "derived") ; Emacs 21
- (defun haskell-cabal-buffers-clean (&optional buffer)
- (let ((bufs ()))
- (dolist (buf haskell-cabal-buffers)
- (if (and (buffer-live-p buf) (not (eq buf buffer))
- (with-current-buffer buf (derived-mode-p 'haskell-cabal-mode)))
- (push buf bufs)))
- (setq haskell-cabal-buffers bufs)))
- (defun haskell-cabal-unregister-buffer ()
- (haskell-cabal-buffers-clean (current-buffer)))
- ;;;###autoload
- (add-to-list 'auto-mode-alist '("\\.cabal\\'" . haskell-cabal-mode))
- ;;;###autoload
- (define-derived-mode haskell-cabal-mode fundamental-mode "Haskell-Cabal"
- "Major mode for Cabal package description files."
- (set (make-local-variable 'font-lock-defaults)
- '(haskell-cabal-font-lock-keywords t t nil nil))
- (add-to-list 'haskell-cabal-buffers (current-buffer))
- (add-hook 'change-major-mode-hook 'haskell-cabal-unregister-buffer nil 'local)
- (add-hook 'kill-buffer-hook 'haskell-cabal-unregister-buffer nil 'local)
- (set (make-local-variable 'comment-start) "-- ")
- (set (make-local-variable 'comment-start-skip) "\\(^[ \t]*\\)--[ \t]*")
- (set (make-local-variable 'comment-end) "")
- (set (make-local-variable 'comment-end-skip) "[ ]*\\(\\s>\\|\n\\)")
- )
- (defun haskell-cabal-get-setting (name)
- (save-excursion
- (let ((case-fold-search t))
- (goto-char (point-min))
- (when (re-search-forward
- (concat "^" (regexp-quote name)
- ":[ \t]*\\(.*\\(\n[ \t]+[ \t\n].*\\)*\\)")
- nil t)
- (let ((val (match-string 1))
- (start 1))
- (when (match-end 2) ;Multiple lines.
- ;; The documentation is not very precise about what to do about
- ;; the \n and the indentation: are they part of the value or
- ;; the encoding? I take the point of view that \n is part of
- ;; the value (so that values can span multiple lines as well),
- ;; and that only the first char in the indentation is part of
- ;; the encoding, the rest is part of the value (otherwise, lines
- ;; in the value cannot start with spaces or tabs).
- (while (string-match "^[ \t]\\(?:\\.$\\)?" val start)
- (setq start (1+ (match-beginning 0)))
- (setq val (replace-match "" t t val))))
- val)))))
- (provide 'haskell-cabal)
- ;; arch-tag: d455f920-5e4d-42b6-a2c7-4a7e84a05c29
- ;;; haskell-cabal.el ends here