132 lines
4.0 KiB
EmacsLisp
132 lines
4.0 KiB
EmacsLisp
;;; makefile-edit.el --- Makefile editing/scanning commands. -*- lexical-binding: t; -*-
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;; Copyright (C) 2009-2024 Free Software Foundation, Inc.
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;; Author: Eric M. Ludlam <zappo@gnu.org>
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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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;;
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;; Utilities for editing a Makefile for EDE Makefile management commands.
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;;
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;; Derived from project-am.el.
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;;
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;; Makefile editing and scanning commands
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;;
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;; Formatting of a makefile
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;;
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;; 1) Creating an automakefile, stick in a top level comment about
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;; being created by Emacs.
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;; 2) Leave order of variable contents alone, except for SOURCE
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;; SOURCE always keep in the order of .c, .h, the other stuff.
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;;; Things to do
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;; makefile-fill-paragraph -- refill a macro with backslashes
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;; makefile-insert-macro -- insert "foo = "
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;;; Code:
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(defun makefile-beginning-of-command ()
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"Move to the beginning of the current command."
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(interactive)
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(if (save-excursion
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(forward-line -1)
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(makefile-line-continued-p))
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(forward-line -1))
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(beginning-of-line)
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(if (not (makefile-line-continued-p))
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nil
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(while (and (makefile-line-continued-p)
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(not (bobp)))
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(forward-line -1))
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(forward-line 1)))
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(defun makefile-end-of-command ()
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"Move to the end of the current command."
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(interactive)
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(end-of-line)
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(while (and (makefile-line-continued-p)
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(not (eobp)))
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(forward-line 1)
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(end-of-line)))
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(defun makefile-line-continued-p ()
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"Return non-nil if the current line ends in continuation."
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(save-excursion
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(end-of-line)
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(= (preceding-char) ?\\)))
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;;; Programmatic editing of a Makefile
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;;
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(defun makefile-move-to-macro (macro &optional next)
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"Move to the definition of MACRO. Return t if found.
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If NEXT is non-nil, move to the next occurrence of MACRO."
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(let ((oldpt (point)))
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(when (not next) (goto-char (point-min)))
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(if (re-search-forward (concat "^\\s-*" (regexp-quote macro) "\\s-*[+:?]?=")
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nil t)
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t
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(goto-char oldpt)
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nil)))
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(defun makefile-navigate-macro (stop-before)
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"In a list of files, move forward until STOP-BEFORE is reached.
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STOP-BEFORE is a regular expression matching a file name."
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(save-excursion
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(makefile-beginning-of-command)
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(let ((e (save-excursion
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(makefile-end-of-command)
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(point))))
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(if (re-search-forward stop-before nil t)
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(goto-char (match-beginning 0))
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(goto-char e)))))
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(defun makefile-macro-file-list (macro)
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"Return a list of all files in MACRO."
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(save-excursion
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(goto-char (point-min))
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(let ((lst nil)
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(case-fold-search nil))
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(while (makefile-move-to-macro macro t)
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(let ((e (save-excursion
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(makefile-end-of-command)
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(point))))
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(while (re-search-forward "\\s-*\\([-a-zA-Z0-9./_@$%(){}]+\\)\\s-*" e t)
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(let ((var nil)(varexp nil)
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(match (buffer-substring-no-properties
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(match-beginning 1)
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(match-end 1))))
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(if (not (setq var (makefile-extract-varname-from-text match)))
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(setq lst (cons match lst))
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(setq varexp (makefile-macro-file-list var))
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(dolist (V varexp)
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(setq lst (cons V lst))))))))
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(nreverse lst))))
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(defun makefile-extract-varname-from-text (text)
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"Extract the variable name from TEXT if it is a variable reference.
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Return nil if it isn't a variable."
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(save-match-data
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(when (string-match "\\$\\s(\\([A-Za-z0-9_]+\\)\\s)" text)
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(match-string 1 text))))
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(provide 'ede/makefile-edit)
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;;; ede/makefile-edit.el ends here
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