mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-11-23 07:19:15 +00:00
269 lines
9.9 KiB
EmacsLisp
269 lines
9.9 KiB
EmacsLisp
;;; executable.el --- base functionality for executable interpreter scripts
|
|
|
|
;; Copyright (C) 1994, 1995, 1996 by Free Software Foundation, Inc.
|
|
|
|
;; Author: Daniel Pfeiffer <occitan@esperanto.org>
|
|
;; Keywords: languages, unix
|
|
|
|
;; This file is part of GNU Emacs.
|
|
|
|
;; GNU Emacs 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 2, or (at your option)
|
|
;; any later version.
|
|
|
|
;; GNU Emacs 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., 59 Temple Place - Suite 330,
|
|
;; Boston, MA 02111-1307, USA.
|
|
|
|
;;; Commentary:
|
|
|
|
;; executable.el is used by certain major modes to insert a suitable
|
|
;; #! line at the beginning of the file, if the file does not already
|
|
;; have one.
|
|
|
|
;; Unless it has a magic number, a Unix file with executable mode is passed to
|
|
;; a new instance of the running shell (or to a Bourne shell if a csh is
|
|
;; running and the file starts with `:'). Only a shell can start such a file,
|
|
;; exec() cannot, which is why it is important to have a magic number in every
|
|
;; executable script. Such a magic number is made up by the characters `#!'
|
|
;; the filename of an interpreter (in COFF, ELF or somesuch format) and one
|
|
;; optional argument.
|
|
|
|
;; This library is for certain major modes like sh-, awk-, perl-, tcl- or
|
|
;; makefile-mode to insert or update a suitable #! line at the beginning of
|
|
;; the file, if the file does not already have one and the file is not a
|
|
;; default file of that interpreter (like .profile or makefile). It also
|
|
;; makes the file executable if it wasn't, as soon as it's saved.
|
|
|
|
;; It also allows debugging scripts, with an adaptation of compile, as far
|
|
;; as interpreters give out meaningful error messages.
|
|
|
|
;; Modes that use this should nconc `executable-map' to the end of their own
|
|
;; keymap and `executable-font-lock-keywords' to the end of their own font
|
|
;; lock keywords. Their mode-setting commands should call
|
|
;; `executable-set-magic'.
|
|
|
|
;;; Code:
|
|
|
|
(defgroup executable nil
|
|
"Base functionality for executable interpreter scripts"
|
|
:group 'processes)
|
|
|
|
(defcustom executable-insert 'other
|
|
"*Non-nil means offer to add a magic number to a file.
|
|
This takes effect when you switch to certain major modes,
|
|
including Shell-script mode (`sh-mode').
|
|
When you type \\[executable-set-magic], it always offers to add or
|
|
update the magic number."
|
|
:type '(choice (const :tag "off" nil)
|
|
(const :tag "on" t)
|
|
symbol)
|
|
:group 'executable)
|
|
|
|
|
|
(defcustom executable-query 'function
|
|
"*If non-nil, ask user before changing an existing magic number.
|
|
When this is `function', only ask when called non-interactively."
|
|
:type '(choice (const :tag "Don't Ask" nil)
|
|
(const :tag "Ask when non-interactive" function)
|
|
(other :tag "Ask" t))
|
|
:group 'executable)
|
|
|
|
|
|
(defcustom executable-magicless-file-regexp "/[Mm]akefile$\\|/\\.\\(z?profile\\|bash_profile\\|z?login\\|bash_login\\|z?logout\\|bash_logout\\|.+shrc\\|esrc\\|rcrc\\|[kz]shenv\\)$"
|
|
"*On files with this kind of name no magic is inserted or changed."
|
|
:type 'regexp
|
|
:group 'executable)
|
|
|
|
|
|
(defcustom executable-prefix "#! "
|
|
"*Interpreter magic number prefix inserted when there was no magic number."
|
|
:type 'string
|
|
:group 'executable)
|
|
|
|
|
|
(defcustom executable-chmod 73
|
|
"*After saving, if the file is not executable, set this mode.
|
|
This mode passed to `set-file-modes' is taken absolutely when negative, or
|
|
relative to the files existing modes. Do nothing if this is nil.
|
|
Typical values are 73 (+x) or -493 (rwxr-xr-x)."
|
|
:type '(choice integer
|
|
(const nil))
|
|
:group 'executable)
|
|
|
|
|
|
(defvar executable-command nil)
|
|
|
|
(defcustom executable-self-display "tail"
|
|
"*Command you use with argument `+2' to make text files self-display.
|
|
Note that the like of `more' doesn't work too well under Emacs \\[shell]."
|
|
:type 'string
|
|
:group 'executable)
|
|
|
|
|
|
(defvar executable-font-lock-keywords
|
|
'(("\\`#!.*/\\([^ \t\n]+\\)" 1 font-lock-keyword-face t))
|
|
"*Rules for highlighting executable scripts' magic number.
|
|
This can be included in `font-lock-keywords' by modes that call `executable'.")
|
|
|
|
|
|
(defvar executable-error-regexp-alist
|
|
'(;; /bin/xyz: syntax error at line 14: `(' unexpected
|
|
;; /bin/xyz[5]: syntax error at line 8 : ``' unmatched
|
|
("^\\(.*[^[/]\\)\\(\\[[0-9]+\\]\\)?: .* error .* line \\([0-9]+\\)" 1 3)
|
|
;; /bin/xyz[27]: ehco: not found
|
|
("^\\(.*[^/]\\)\\[\\([0-9]+\\)\\]: .*: " 1 2)
|
|
;; /bin/xyz: syntax error near unexpected token `)'
|
|
;; /bin/xyz: /bin/xyz: line 2: `)'
|
|
("^\\(.*[^/]\\): [^0-9\n]+\n\\1: \\1: line \\([0-9]+\\):" 1 2)
|
|
;; /usr/bin/awk: syntax error at line 5 of file /bin/xyz
|
|
(" error .* line \\([0-9]+\\) of file \\(.+\\)$" 2 1)
|
|
;; /usr/bin/awk: calling undefined function toto
|
|
;; input record number 3, file awktestdata
|
|
;; source line 4 of file /bin/xyz
|
|
("^[^ ].+\n\\( .+\n\\)* line \\([0-9]+\\) of file \\(.+\\)$" 3 2)
|
|
;; makefile:1: *** target pattern contains no `%'. Stop.
|
|
("^\\(.+\\):\\([0-9]+\\): " 1 2))
|
|
"Alist of regexps used to match script errors.
|
|
See `compilation-error-regexp-alist'.")
|
|
|
|
;; The C function openp slightly modified would do the trick fine
|
|
(defvar executable-binary-suffixes
|
|
(if (memq system-type '(ms-dos windows-nt))
|
|
'(".exe" ".com" ".bat" ".cmd" ".btm" "")
|
|
'("")))
|
|
(defun executable-find (command)
|
|
"Search for COMMAND in exec-path and return the absolute file name.
|
|
Return nil if COMMAND is not found anywhere in `exec-path'."
|
|
(let ((list exec-path)
|
|
file)
|
|
(while list
|
|
(setq list
|
|
(if (and (setq file (expand-file-name command (car list)))
|
|
(let ((suffixes executable-binary-suffixes)
|
|
candidate)
|
|
(while suffixes
|
|
(setq candidate (concat file (car suffixes)))
|
|
(if (and (file-executable-p candidate)
|
|
(not (file-directory-p candidate)))
|
|
(setq suffixes nil)
|
|
(setq suffixes (cdr suffixes))
|
|
(setq candidate nil)))
|
|
(setq file candidate)))
|
|
nil
|
|
(setq file nil)
|
|
(cdr list))))
|
|
file))
|
|
|
|
(defun executable-chmod ()
|
|
"This gets called after saving a file to assure that it be executable.
|
|
You can set the absolute or relative mode in variable `executable-chmod' for
|
|
non-executable files."
|
|
(and executable-chmod
|
|
buffer-file-name
|
|
(or (file-executable-p buffer-file-name)
|
|
(set-file-modes buffer-file-name
|
|
(if (< executable-chmod 0)
|
|
(- executable-chmod)
|
|
(logior executable-chmod
|
|
(file-modes buffer-file-name)))))))
|
|
|
|
|
|
(defun executable-interpret (command)
|
|
"Run script with user-specified args, and collect output in a buffer.
|
|
While script runs asynchronously, you can use the \\[next-error] command
|
|
to find the next error."
|
|
(interactive (list (read-string "Run script: "
|
|
(or executable-command
|
|
buffer-file-name))))
|
|
(require 'compile)
|
|
(save-some-buffers (not compilation-ask-about-save))
|
|
(make-local-variable 'executable-command)
|
|
(compile-internal (setq executable-command command)
|
|
"No more errors." "Interpretation"
|
|
;; Give it a simpler regexp to match.
|
|
nil executable-error-regexp-alist))
|
|
|
|
|
|
|
|
;;;###autoload
|
|
(defun executable-set-magic (interpreter &optional argument
|
|
no-query-flag insert-flag)
|
|
"Set this buffer's interpreter to INTERPRETER with optional ARGUMENT.
|
|
The variables `executable-magicless-file-regexp', `executable-prefix',
|
|
`executable-insert', `executable-query' and `executable-chmod' control
|
|
when and how magic numbers are inserted or replaced and scripts made
|
|
executable."
|
|
(interactive
|
|
(let* ((name (read-string "Name or file name of interpreter: "))
|
|
(arg (read-string (format "Argument for %s: " name))))
|
|
(list name arg (eq executable-query 'function) t)))
|
|
(setq interpreter (if (file-name-absolute-p interpreter)
|
|
interpreter
|
|
(or (executable-find interpreter)
|
|
(error "Interpreter %s not recognized" interpreter)))
|
|
argument (concat interpreter
|
|
(and argument (string< "" argument) " ")
|
|
argument))
|
|
(or buffer-read-only
|
|
(if buffer-file-name
|
|
(string-match executable-magicless-file-regexp
|
|
buffer-file-name))
|
|
(not (or insert-flag executable-insert))
|
|
(> (point-min) 1)
|
|
(save-excursion
|
|
(let ((point (point-marker))
|
|
(buffer-modified-p (buffer-modified-p)))
|
|
(goto-char (point-min))
|
|
(make-local-hook 'after-save-hook)
|
|
(add-hook 'after-save-hook 'executable-chmod nil t)
|
|
(if (looking-at "#![ \t]*\\(.*\\)$")
|
|
(and (goto-char (match-beginning 1))
|
|
;; If the line ends in a space,
|
|
;; don't offer to change it.
|
|
(not (= (char-after (1- (match-end 1))) ?\ ))
|
|
(not (string= argument
|
|
(buffer-substring (point) (match-end 1))))
|
|
(if (or (not executable-query) no-query-flag
|
|
(save-window-excursion
|
|
;; Make buffer visible before question.
|
|
(switch-to-buffer (current-buffer))
|
|
(y-or-n-p (concat "Replace magic number by `"
|
|
executable-prefix argument "'? "))))
|
|
(progn
|
|
(replace-match argument t t nil 1)
|
|
(message "Magic number changed to `%s'"
|
|
(concat executable-prefix argument)))))
|
|
(insert executable-prefix argument ?\n)
|
|
(message "Magic number changed to `%s'"
|
|
(concat executable-prefix argument)))
|
|
;;; (or insert-flag
|
|
;;; (eq executable-insert t)
|
|
;;; (set-buffer-modified-p buffer-modified-p))
|
|
)))
|
|
interpreter)
|
|
|
|
|
|
|
|
;;;###autoload
|
|
(defun executable-self-display ()
|
|
"Turn a text file into a self-displaying Un*x command.
|
|
The magic number of such a command displays all lines but itself."
|
|
(interactive)
|
|
(if (eq this-command 'executable-self-display)
|
|
(setq this-command 'executable-set-magic))
|
|
(executable-set-magic executable-self-display "+2"))
|
|
|
|
|
|
|
|
(provide 'executable)
|
|
|
|
;; executable.el ends here
|