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|
;;; mh-init.el --- MH-E initialization.
;; Copyright (C) 2003, 2004 Free Software Foundation, Inc.
;; Author: Peter S. Galbraith <psg@debian.org>
;; Maintainer: Bill Wohler <wohler@newt.com>
;; Keywords: mail
;; See: mh-e.el
;; 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:
;; Sets up the MH variant (currently nmh or MH).
;;
;; Users may customize `mh-variant' to switch between available variants.
;; Available MH variants are described in the variable `mh-variants'.
;; Developers may check which variant is currently in use with the
;; variable `mh-variant-in-use' or the function `mh-variant-p'.
;;; Change Log:
;;; Code:
(eval-when-compile (require 'mh-acros))
(mh-require-cl)
(require 'mh-utils)
;;; Set for local environment:
;;; mh-progs and mh-lib used to be set in paths.el, which tried to
;;; figure out at build time which of several possible directories MH
;;; was installed into. But if you installed MH after building Emacs,
;;; this would almost certainly be wrong, so now we do it at run time.
(defvar mh-progs nil
"Directory containing MH commands, such as inc, repl, and rmm.")
(defvar mh-lib nil
"Directory containing the MH library.
This directory contains, among other things, the components file.")
(defvar mh-lib-progs nil
"Directory containing MH helper programs.
This directory contains, among other things, the mhl program.")
(defvar mh-flists-present-flag nil
"Non-nil means that we have `flists'.")
;;;###autoload
(put 'mh-progs 'risky-local-variable t)
;;;###autoload
(put 'mh-lib 'risky-local-variable t)
;;;###autoload
(put 'mh-lib-progs 'risky-local-variable t)
(defvar mh-variant-in-use nil
"The MH variant currently in use; a string with variant and version number.
This differs from `mh-variant' when the latter is set to `autodetect'.")
;;;###mh-autoload
(defun mh-variant-set (variant)
"Set the MH variant to VARIANT.
Sets `mh-progs', `mh-lib', `mh-lib-progs' and `mh-flists-present-flag'.
If the VARIANT is `autodetect', then first try nmh, then MH and finally
GNU mailutils."
(interactive
(list (completing-read
"MH Variant: "
(mapcar (lambda (x) (list (car x))) (mh-variants))
nil t)))
(let ((valid-list (mapcar (lambda (x) (car x)) (mh-variants))))
(cond
((eq variant 'none))
((eq variant 'autodetect)
(cond
((mh-variant-set-variant 'nmh)
(message "%s installed as MH variant" mh-variant-in-use))
((mh-variant-set-variant 'MH)
(message "%s installed as MH variant" mh-variant-in-use))
((mh-variant-set-variant 'mu-mh)
(message "%s installed as MH variant" mh-variant-in-use))
(t
(message "No MH variant found on the system!"))))
((member variant valid-list)
(when (not (mh-variant-set-variant variant))
(message "Warning: %s variant not found. Autodetecting..." variant)
(mh-variant-set 'autodetect)))
(t
(message "Unknown variant. Use %s"
(mapconcat '(lambda (x) (format "%s" (car x)))
mh-variants " or "))))))
(defun mh-variant-set-variant (variant)
"Setup the system variables for the MH variant named VARIANT.
If VARIANT is a string, use that key in the variable `mh-variants'.
If VARIANT is a symbol, select the first entry that matches that variant."
(cond
((stringp variant) ;e.g. "nmh 1.1-RC1"
(when (assoc variant mh-variants)
(let* ((alist (cdr (assoc variant mh-variants)))
(lib-progs (cadr (assoc 'mh-lib-progs alist)))
(lib (cadr (assoc 'mh-lib alist)))
(progs (cadr (assoc 'mh-progs alist)))
(flists (cadr (assoc 'flists alist))))
;;(set-default mh-variant variant)
(setq mh-x-mailer-string nil
mh-flists-present-flag flists
mh-lib-progs lib-progs
mh-lib lib
mh-progs progs
mh-variant-in-use variant))))
((symbolp variant) ;e.g. 'nmh (pick the first match)
(loop for variant-list in mh-variants
when (eq variant (cadr (assoc 'variant (cdr variant-list))))
return (let* ((version (car variant-list))
(alist (cdr variant-list))
(lib-progs (cadr (assoc 'mh-lib-progs alist)))
(lib (cadr (assoc 'mh-lib alist)))
(progs (cadr (assoc 'mh-progs alist)))
(flists (cadr (assoc 'flists alist))))
;;(set-default mh-variant flavor)
(setq mh-x-mailer-string nil
mh-flists-present-flag flists
mh-lib-progs lib-progs
mh-lib lib
mh-progs progs
mh-variant-in-use version)
t)))))
;;;###mh-autoload
(defun mh-variant-p (&rest variants)
"Return t if variant is any of VARIANTS.
Currently known variants are 'mh and 'nmh."
(let ((variant-in-use
(cadr (assoc 'variant (assoc mh-variant-in-use mh-variants)))))
(not (null (member variant-in-use variants)))))
(defvar mh-sys-path
'("/usr/local/nmh/bin" ; nmh default
"/usr/local/bin/mh/"
"/usr/local/mh/"
"/usr/bin/mh/" ; Ultrix 4.2, Linux
"/usr/new/mh/" ; Ultrix < 4.2
"/usr/contrib/mh/bin/" ; BSDI
"/usr/pkg/bin/" ; NetBSD
"/usr/local/bin/"
"/usr/local/bin/mu-mh/" ; GNU mailutils - default
"/usr/bin/mu-mh/") ; GNU mailutils - packaged
"List of directories to search for variants of the MH variant.
The list `exec-path' is searched in addition to this list.
There's no need for users to modify this list. Instead add extra
directories to the customizable variable `mh-path'.")
(defcustom mh-path nil
"*List of directories to search for variants of the MH variant.
The directories will be searched for `mhparam' in addition to directories
listed in `mh-sys-path' and `exec-path'."
:group 'mh
:type '(repeat (directory)))
(defvar mh-variants nil
"List describing known MH variants.
Created by the function `mh-variants'")
(defun mh-variant-mh-info (dir)
"Return info for MH variant in DIR assuming a temporary buffer is setup."
;; MH does not have the -version option.
;; Its version number is included in the output of `-help' as:
;;
;; version: MH 6.8.4 #2[UCI] (burrito) of Fri Jan 15 20:01:39 EST 1999
;; options: [ATHENA] [BIND] [DUMB] [LIBLOCKFILE] [LOCALE] [MAILGROUP] [MHE]
;; [MHRC] [MIME] [MORE='"/usr/bin/sensible-pager"'] [NLINK_HACK]
;; [NORUSERPASS] [OVERHEAD] [POP] [POPSERVICE='"pop-3"'] [RENAME]
;; [RFC1342] [RPATHS] [RPOP] [SENDMTS] [SMTP] [SOCKETS]
;; [SPRINTFTYPE=int] [SVR4] [SYS5] [SYS5DIR] [TERMINFO]
;; [TYPESIG=void] [UNISTD] [UTK] [VSPRINTF]
(let ((mhparam (expand-file-name "mhparam" dir)))
(when (and (file-exists-p mhparam) (file-executable-p mhparam))
(erase-buffer)
(call-process mhparam nil '(t nil) nil "-help")
(goto-char (point-min))
(when (search-forward-regexp "version: MH \\(\\S +\\)" nil t)
(let ((version (format "MH %s" (match-string 1))))
(erase-buffer)
(call-process mhparam nil '(t nil) nil "libdir")
(goto-char (point-min))
(when (search-forward-regexp "^.*$" nil t)
(let ((libdir (match-string 0)))
`(,version
(variant mh)
(mh-lib-progs ,libdir)
(mh-lib ,libdir)
(mh-progs ,dir)
(flists nil)))))))))
(defun mh-variant-mu-mh-info (dir)
"Return info for GNU mailutils variant in DIR.
This assumes that a temporary buffer is setup."
;; 'mhparam -version' output:
;; mhparam (GNU mailutils 0.3.2)
(let ((mhparam (expand-file-name "mhparam" dir)))
(when (and (file-exists-p mhparam) (file-executable-p mhparam))
(erase-buffer)
(call-process mhparam nil '(t nil) nil "-version")
(goto-char (point-min))
(when (search-forward-regexp "mhparam (\\(GNU [Mm]ailutils \\S +\\))"
nil t)
(let ((version (match-string 1)))
(erase-buffer)
(call-process mhparam nil '(t nil) nil "libdir" "etcdir")
(goto-char (point-min))
(when (search-forward-regexp "^libdir:\\s-\\(\\S-+\\)\\s-*$" nil t)
(let ((libdir (match-string 1)))
(goto-char (point-min))
(when (search-forward-regexp
"^etcdir:\\s-\\(\\S-+\\)\\s-*$" nil t)
(let ((etcdir (match-string 1))
(flists (file-exists-p (expand-file-name "flists" dir))))
`(,version
(variant mu-mh)
(mh-lib-progs ,libdir)
(mh-lib ,etcdir)
(mh-progs ,dir)
(flists ,flists)))))))))))
(defun mh-variant-nmh-info (dir)
"Return info for nmh variant in DIR assuming a temporary buffer is setup."
;; `mhparam -version' outputs:
;; mhparam -- nmh-1.1-RC1 [compiled on chaak at Fri Jun 20 11:03:28 PDT 2003]
(let ((mhparam (expand-file-name "mhparam" dir)))
(when (and (file-exists-p mhparam) (file-executable-p mhparam))
(erase-buffer)
(call-process mhparam nil '(t nil) nil "-version")
(goto-char (point-min))
(when (search-forward-regexp "mhparam -- nmh-\\(\\S +\\)" nil t)
(let ((version (format "nmh %s" (match-string 1))))
(erase-buffer)
(call-process mhparam nil '(t nil) nil "libdir" "etcdir")
(goto-char (point-min))
(when (search-forward-regexp "^libdir:\\s-\\(\\S-+\\)\\s-*$" nil t)
(let ((libdir (match-string 1)))
(goto-char (point-min))
(when (search-forward-regexp
"^etcdir:\\s-\\(\\S-+\\)\\s-*$" nil t)
(let ((etcdir (match-string 1))
(flists (file-exists-p (expand-file-name "flists" dir))))
`(,version
(variant nmh)
(mh-lib-progs ,libdir)
(mh-lib ,etcdir)
(mh-progs ,dir)
(flists ,flists)))))))))))
(defun mh-variant-info (dir)
"Return MH variant found in DIR, or nil if none present."
(save-excursion
(let ((tmp-buffer (get-buffer-create mh-temp-buffer)))
(set-buffer tmp-buffer)
(cond
((mh-variant-mh-info dir))
((mh-variant-nmh-info dir))
((mh-variant-mu-mh-info dir))))))
;;;###mh-autoload
(defun mh-variants ()
"Return a list of installed variants of MH on the system.
This function looks for MH in `mh-sys-path', `mh-path' and
`exec-path'. The format of the list of variants that is returned is described
by the variable `mh-variants'."
(if mh-variants
mh-variants
(let ((list-unique))
;; Make a unique list of directories, keeping the given order.
;; We don't want the same MH variant to be listed multiple times.
(loop for dir in (append mh-path mh-sys-path exec-path) do
(setq dir (file-chase-links (directory-file-name dir)))
(add-to-list 'list-unique dir))
(loop for dir in (nreverse list-unique) do
(when (and dir (file-directory-p dir) (file-readable-p dir))
(let ((variant (mh-variant-info dir)))
(if variant
(add-to-list 'mh-variants variant)))))
mh-variants)))
(provide 'mh-init)
;;; Local Variables:
;;; indent-tabs-mode: nil
;;; sentence-end-double-space: nil
;;; End:
;; arch-tag: e8372aeb-d803-42b1-9c95-3c93ad22f63c
;;; mh-init.el ends here
|
