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57 lines
2.4 KiB
EmacsLisp
57 lines
2.4 KiB
EmacsLisp
;;; shorthands.el --- Read code considering Elisp shorthands -*- lexical-binding: t; -*-
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;; Copyright (C) 2021 Free Software Foundation, Inc.
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;; Author: João Távora <joaotavora@gmail.com>
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;; Keywords: lisp
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Basic helpers for loading files with Shorthands.
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;;; Code:
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(require 'files)
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(defun hack-elisp-shorthands (fullname)
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"Return value of `elisp-shorthands' file-local variable in FULLNAME.
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FULLNAME is the absolute file name of an Elisp .el file which
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potentially specifies a file-local value for `elisp-shorthands'.
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The Elisp code in FULLNAME isn't read or evaluated in any way,
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except for extraction of the buffer-local value of
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`elisp-shorthands'."
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(let* ((size (nth 7 (file-attributes fullname)))
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(from (max 0 (- size 3000)))
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(to size))
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(with-temp-buffer
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(while (and (< (buffer-size) 3000) (>= from 0))
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(insert-file-contents fullname nil from to)
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(setq to from from (- from 100)))
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;; FIXME: relies on the `hack-local-variables--find-variables'
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;; detail of files.el. That function should be exported,
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;; possibly be refactored into two parts, since we're only
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;; interested in basic "Local Variables" parsing.
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(alist-get 'elisp-shorthands (hack-local-variables--find-variables)))))
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(defun load-with-shorthands-and-code-conversion (fullname file noerror nomessage)
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"Like `load-with-code-conversion', but also consider Elisp shorthands.
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This function uses shorthands defined in the file FULLNAME's local
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value of `elisp-shorthands', when it processes that file's Elisp code."
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(let ((elisp-shorthands (hack-elisp-shorthands fullname)))
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(load-with-code-conversion fullname file noerror nomessage)))
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;;; shorthands.el ends here
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