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(executable-find): Renamed from `executable'.

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(executable-set-magic): Use new name `executable'.  Fix messages.
Add save-excursion.  Don't test this-command--use interactive
to get the information.  Simplify considerably.
This commit is contained in:
Karl Heuer 1996-01-09 23:17:18 +00:00
parent a731bd48ea
commit 291c92b777
1 changed files with 45 additions and 42 deletions
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87
lisp/progmodes/executable.el
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@ -101,19 +101,20 @@ This can be included in `font-lock-keywords' by modes that call `executable'.")
"Alist of regexps used to match script errors.
See `compilation-error-regexp-alist'.")
;; The C function openp() slightly modified would do the trick fine
(defun executable (command)
"If COMMAND is an executable in $PATH its full name is returned. Else nil."
;; The C function openp slightly modified would do the trick fine
(defun executable-find (command)
"Search for COMMAND in $PATH and return the absolute file name.
Return nil if COMMAND is not found anywhere in $PATH."
(let ((list exec-path)
path)
file)
(while list
(setq list (if (and (setq path (expand-file-name command (car list)))
(file-executable-p path)
(not (file-directory-p path)))
(setq list (if (and (setq file (expand-file-name command (car list)))
(file-executable-p file)
(not (file-directory-p file)))
nil
(setq path nil)
(setq file nil)
(cdr list))))
path))
file))
(defun executable-chmod ()
@ -148,17 +149,21 @@ to find the next error."
;;;###autoload
(defun executable-set-magic (interpreter &optional argument)
(defun executable-set-magic (interpreter &optional argument
no-query-flag insert-flag)
"Set this buffer's interpreter to INTERPRETER with optional ARGUMENT.
The variables `executable-magicless-file-regexp', `executable-prefix',
`executable-insert', `executable-query' and `executable-chmod' control
when and how magic numbers are inserted or replaced and scripts made
executable."
(interactive "sName or path of interpreter: \nsArgument for %s: ")
(interactive
(let* ((name (read-string "Name or file name of interpreter: "))
(arg (read-string (format "Argument for %s: " name))))
(list name arg (eq executable-query 'function) t)))
(setq interpreter (if (file-name-absolute-p interpreter)
interpreter
(or (executable interpreter)
(error "Cannot find %s." interpreter)))
(or (executable-find interpreter)
(error "Interpreter %s not recognized" interpreter)))
argument (concat interpreter
(and argument (string< "" argument) " ")
argument))
@ -166,36 +171,34 @@ executable."
(if buffer-file-name
(string-match executable-magicless-file-regexp
buffer-file-name))
(not (or (eq this-command 'executable-set-magic)
executable-insert))
(not (or insert-flag executable-insert))
(> (point-min) 1)
(let ((point (point-marker))
(buffer-modified-p (buffer-modified-p)))
(goto-char (point-min))
(make-local-hook 'after-save-hook)
(add-hook 'after-save-hook 'executable-chmod nil t)
(if (looking-at "#![ \t]*\\(.*\\)$")
(and (goto-char (match-beginning 1))
(not (string= argument
(buffer-substring (point) (match-end 1))))
(save-window-excursion
;; make buffer visible before question or message
(switch-to-buffer (current-buffer))
(if (or (not executable-query)
(and (eq executable-query 'function)
(eq this-command 'executable-set-magic)))
(message "%s Magic number ``%s'' replaced." this-command
(buffer-substring (point-min) (match-end 1)))
(y-or-n-p (concat "Replace magic number by ``"
executable-prefix argument "''? "))))
(not (delete-region (point) (match-end 1)))
(insert argument))
(insert executable-prefix argument ?\n))
(or (< (marker-position point) (point))
(goto-char point))
(or (eq this-command 'executable-set-magic))
(eq executable-insert t)
(set-buffer-modified-p buffer-modified-p)))
(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))
(not (string= argument
(buffer-substring (point) (match-end 1))))
(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)