[bpt/emacs.git] / lisp / gnus / nneething.el

;;; nneething.el --- arbitrary file access for Gnus

;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000
;;	Free Software Foundation, Inc.

;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
;; 	Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>
;; Keywords: news, mail

;; 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:

;;; Code:

(eval-when-compile (require 'cl))

(require 'nnheader)
(require 'nnmail)
(require 'nnoo)
(require 'gnus-util)

(nnoo-declare nneething)

(defvoo nneething-map-file-directory "~/.nneething/"
  "Where nneething stores the map files.")

(defvoo nneething-map-file ".nneething"
  "Name of the map files.")

(defvoo nneething-exclude-files nil
  "Regexp saying what files to exclude from the group.
If this variable is nil, no files will be excluded.")

(defvoo nneething-include-files nil
  "Regexp saying what files to include in the group.
If this variable is non-nil, only files matching this regexp will be
included.")

\f

;;; Internal variables.

(defconst nneething-version "nneething 1.0"
  "nneething version.")

(defvoo nneething-current-directory nil
  "Current news group directory.")

(defvoo nneething-status-string "")

(defvoo nneething-message-id-number 0)
(defvoo nneething-work-buffer " *nneething work*")

(defvoo nneething-group nil)
(defvoo nneething-map nil)
(defvoo nneething-read-only nil)
(defvoo nneething-active nil)
(defvoo nneething-address nil)

\f

;;; Interface functions.

(nnoo-define-basics nneething)

(deffoo nneething-retrieve-headers (articles &optional group server fetch-old)
  (nneething-possibly-change-directory group)

  (save-excursion
    (set-buffer nntp-server-buffer)
    (erase-buffer)
    (let* ((number (length articles))
	   (count 0)
	   (large (and (numberp nnmail-large-newsgroup)
		       (> number nnmail-large-newsgroup)))
	   article file)

      (if (stringp (car articles))
	  'headers

	(while (setq article (pop articles))
	  (setq file (nneething-file-name article))

	  (when (and (file-exists-p file)
		     (or (file-directory-p file)
			 (not (zerop (nnheader-file-size file)))))
	    (insert (format "221 %d Article retrieved.\n" article))
	    (nneething-insert-head file)
	    (insert ".\n"))

	  (incf count)

	  (and large
	       (zerop (% count 20))
	       (nnheader-message 5 "nneething: Receiving headers... %d%%"
				 (/ (* count 100) number))))

	(when large
	  (nnheader-message 5 "nneething: Receiving headers...done"))

	(nnheader-fold-continuation-lines)
	'headers))))

(deffoo nneething-request-article (id &optional group server buffer)
  (nneething-possibly-change-directory group)
  (let ((file (unless (stringp id)
		(nneething-file-name id)))
	(nntp-server-buffer (or buffer nntp-server-buffer)))
    (and (stringp file)			; We did not request by Message-ID.
	 (file-exists-p file)		; The file exists.
	 (not (file-directory-p file))	; It's not a dir.
	 (save-excursion
	   (nnmail-find-file file)	; Insert the file in the nntp buf.
	   (unless (nnheader-article-p)	; Either it's a real article...
	     (goto-char (point-min))
	     (nneething-make-head
	      file (current-buffer))	; ... or we fake some headers.
	     (insert "\n"))
	   t))))

(deffoo nneething-request-group (group &optional server dont-check)
  (nneething-possibly-change-directory group server)
  (unless dont-check
    (nneething-create-mapping)
    (if (> (car nneething-active) (cdr nneething-active))
	(nnheader-insert "211 0 1 0 %s\n" group)
      (nnheader-insert
       "211 %d %d %d %s\n"
       (- (1+ (cdr nneething-active)) (car nneething-active))
       (car nneething-active) (cdr nneething-active)
       group)))
  t)

(deffoo nneething-request-list (&optional server dir)
  (nnheader-report 'nneething "LIST is not implemented."))

(deffoo nneething-request-newgroups (date &optional server)
  (nnheader-report 'nneething "NEWSGROUPS is not implemented."))

(deffoo nneething-request-type (group &optional article)
  'unknown)

(deffoo nneething-close-group (group &optional server)
  (setq nneething-current-directory nil)
  t)

(deffoo nneething-open-server (server &optional defs)
  (nnheader-init-server-buffer)
  (if (nneething-server-opened server)
      t
    (unless (assq 'nneething-address defs)
      (setq defs (append defs (list (list 'nneething-address server)))))
    (nnoo-change-server 'nneething server defs)))

\f
;;; Internal functions.

(defun nneething-possibly-change-directory (group &optional server)
  (when (and server
	     (not (nneething-server-opened server)))
    (nneething-open-server server))
  (when (and group
	     (not (equal nneething-group group)))
    (setq nneething-group group)
    (setq nneething-map nil)
    (setq nneething-active (cons 1 0))
    (nneething-create-mapping)))

(defun nneething-map-file ()
  ;; We make sure that the .nneething directory exists.
  (gnus-make-directory nneething-map-file-directory)
  ;; We store it in a special directory under the user's home dir.
  (concat (file-name-as-directory nneething-map-file-directory)
	  nneething-group nneething-map-file))

(defun nneething-create-mapping ()
  ;; Read nneething-active and nneething-map.
  (when (file-exists-p nneething-address)
    (let ((map-file (nneething-map-file))
	  (files (directory-files nneething-address))
	  touched map-files)
      (when (file-exists-p map-file)
	(ignore-errors
	  (load map-file nil t t)))
      (unless nneething-active
	(setq nneething-active (cons 1 0)))
      ;; Old nneething had a different map format.
      (when (and (cdar nneething-map)
		 (atom (cdar nneething-map)))
	(setq nneething-map
	      (mapcar (lambda (n)
			(list (cdr n) (car n)
			      (nth 5 (file-attributes
				      (nneething-file-name (car n))))))
		      nneething-map)))
      ;; Remove files matching the exclusion regexp.
      (when nneething-exclude-files
	(let ((f files)
	      prev)
	  (while f
	    (if (string-match nneething-exclude-files (car f))
		(if prev (setcdr prev (cdr f))
		  (setq files (cdr files)))
	      (setq prev f))
	    (setq f (cdr f)))))
      ;; Remove files not matching the inclusion regexp.
      (when nneething-include-files
	(let ((f files)
	      prev)
	  (while f
	    (if (not (string-match nneething-include-files (car f)))
		(if prev (setcdr prev (cdr f))
		  (setq files (cdr files)))
	      (setq prev f))
	    (setq f (cdr f)))))
      ;; Remove deleted files from the map.
      (let ((map nneething-map)
	    prev)
	(while map
	  (if (and (member (cadr (car map)) files)
		   ;; We also remove files that have changed mod times.
		   (equal (nth 5 (file-attributes
				  (nneething-file-name (cadr (car map)))))
			  (cadr (cdar map))))
	      (progn
		(push (cadr (car map)) map-files)
		(setq prev map))
	    (setq touched t)
	    (if prev
		(setcdr prev (cdr map))
	      (setq nneething-map (cdr nneething-map))))
	  (setq map (cdr map))))
      ;; Find all new files and enter them into the map.
      (while files
	(unless (member (car files) map-files)
	  ;; This file is not in the map, so we enter it.
	  (setq touched t)
	  (setcdr nneething-active (1+ (cdr nneething-active)))
	  (push (list (cdr nneething-active) (car files)
		      (nth 5 (file-attributes
			      (nneething-file-name (car files)))))
		nneething-map))
	(setq files (cdr files)))
      (when (and touched
		 (not nneething-read-only))
	(with-temp-file map-file
	  (insert "(setq nneething-map '")
	  (gnus-prin1 nneething-map)
	  (insert ")\n(setq nneething-active '")
	  (gnus-prin1 nneething-active)
	  (insert ")\n"))))))

(defun nneething-insert-head (file)
  "Insert the head of FILE."
  (when (nneething-get-head file)
    (insert-buffer-substring nneething-work-buffer)
    (goto-char (point-max))))

(defun nneething-make-head (file &optional buffer)
  "Create a head by looking at the file attributes of FILE."
  (let ((atts (file-attributes file)))
    (insert
     "Subject: " (file-name-nondirectory file) "\n"
     "Message-ID: <nneething-"
     (int-to-string (incf nneething-message-id-number))
     "@" (system-name) ">\n"
     (if (equal '(0 0) (nth 5 atts)) ""
       (concat "Date: " (current-time-string (nth 5 atts)) "\n"))
     (or (when buffer
	   (save-excursion
	     (set-buffer buffer)
	     (when (re-search-forward "<[a-zA-Z0-9_]@[-a-zA-Z0-9_]>" 1000 t)
	       (concat "From: " (match-string 0) "\n"))))
	 (nneething-from-line (nth 2 atts) file))
     (if (> (string-to-int (int-to-string (nth 7 atts))) 0)
	 (concat "Chars: " (int-to-string (nth 7 atts)) "\n")
       "")
     (if buffer
	 (save-excursion
	   (set-buffer buffer)
	   (concat "Lines: " (int-to-string
			      (count-lines (point-min) (point-max)))
		   "\n"))
       ""))))

(defun nneething-from-line (uid &optional file)
  "Return a From header based of UID."
  (let* ((login (condition-case nil
		    (user-login-name uid)
		  (error
		   (cond ((= uid (user-uid)) (user-login-name))
			 ((zerop uid) "root")
			 (t (int-to-string uid))))))
	 (name (condition-case nil
		   (user-full-name uid)
		 (error
		  (cond ((= uid (user-uid)) (user-full-name))
			((zerop uid) "Ms. Root")))))
	 (host (if  (string-match "\\`/[^/@]*@\\([^:/]+\\):" file)
		   (prog1
		       (substring file
				  (match-beginning 1)
				  (match-end 1))
		     (when (string-match
			    "/\\(users\\|home\\)/\\([^/]+\\)/" file)
		       (setq login (substring file
					      (match-beginning 2)
					      (match-end 2))
			     name nil)))
		 (system-name))))
    (concat "From: " login "@" host
	    (if name (concat " (" name ")") "") "\n")))

(defun nneething-get-head (file)
  "Either find the head in FILE or make a head for FILE."
  (save-excursion
    (set-buffer (get-buffer-create nneething-work-buffer))
    (setq case-fold-search nil)
    (buffer-disable-undo)
    (erase-buffer)
    (cond
     ((not (file-exists-p file))
      ;; The file do not exist.
      nil)
     ((or (file-directory-p file)
	  (file-symlink-p file))
      ;; It's a dir, so we fudge a head.
      (nneething-make-head file) t)
     (t
      ;; We examine the file.
      (nnheader-insert-head file)
      (if (nnheader-article-p)
	  (delete-region
	   (progn
	     (goto-char (point-min))
	     (or (and (search-forward "\n\n" nil t)
		      (1- (point)))
		 (point-max)))
	   (point-max))
	(goto-char (point-min))
	(nneething-make-head file (current-buffer))
	(delete-region (point) (point-max)))
      t))))

(defun nneething-file-name (article)
  "Return the file name of ARTICLE."
  (let ((dir (file-name-as-directory nneething-address))
        fname)
    (if (numberp article)
	(if (setq fname (cadr (assq article nneething-map)))
	    (expand-file-name fname dir)
	  (mm-make-temp-file (expand-file-name "nneething" dir)))
      (expand-file-name article dir))))

(provide 'nneething)

;;; arch-tag: 1277f386-88f2-4459-bb24-f3f45962a6c5
;;; nneething.el ends here
Commit	Line	Data
6748645f	1	;;; nneething.el --- arbitrary file access for Gnus
16409b0b GM	2
	3	;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000
	4	;; Free Software Foundation, Inc.
eec82323	5
6748645f	6	;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
eec82323 LMI	7	;; Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>
	8	;; Keywords: news, mail
	9
	10	;; This file is part of GNU Emacs.
	11
	12	;; GNU Emacs is free software; you can redistribute it and/or modify
	13	;; it under the terms of the GNU General Public License as published by
	14	;; the Free Software Foundation; either version 2, or (at your option)
	15	;; any later version.
	16
	17	;; GNU Emacs is distributed in the hope that it will be useful,
	18	;; but WITHOUT ANY WARRANTY; without even the implied warranty of
	19	;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	20	;; GNU General Public License for more details.
	21
	22	;; You should have received a copy of the GNU General Public License
	23	;; along with GNU Emacs; see the file COPYING. If not, write to the
	24	;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
	25	;; Boston, MA 02111-1307, USA.
	26
	27	;;; Commentary:
	28
	29	;;; Code:
	30
0df953b6 RS	31	(eval-when-compile (require 'cl))
0df953b6 RS	32
eec82323 LMI	33	(require 'nnheader)
	34	(require 'nnmail)
	35	(require 'nnoo)
	36	(require 'gnus-util)
eec82323 LMI	37
	38	(nnoo-declare nneething)
	39
	40	(defvoo nneething-map-file-directory "~/.nneething/"
	41	"Where nneething stores the map files.")
	42
	43	(defvoo nneething-map-file ".nneething"
	44	"Name of the map files.")
	45
	46	(defvoo nneething-exclude-files nil
	47	"Regexp saying what files to exclude from the group.
	48	If this variable is nil, no files will be excluded.")
	49
16409b0b GM	50	(defvoo nneething-include-files nil
	51	"Regexp saying what files to include in the group.
	52	If this variable is non-nil, only files matching this regexp will be
	53	included.")
	54
eec82323 LMI	55	\f
	56
	57	;;; Internal variables.
	58
	59	(defconst nneething-version "nneething 1.0"
	60	"nneething version.")
	61
	62	(defvoo nneething-current-directory nil
	63	"Current news group directory.")
	64
	65	(defvoo nneething-status-string "")
	66
	67	(defvoo nneething-message-id-number 0)
	68	(defvoo nneething-work-buffer " nneething work")
	69
	70	(defvoo nneething-group nil)
	71	(defvoo nneething-map nil)
	72	(defvoo nneething-read-only nil)
	73	(defvoo nneething-active nil)
6748645f	74	(defvoo nneething-address nil)
eec82323 LMI	75
	76	\f
	77
	78	;;; Interface functions.
	79
	80	(nnoo-define-basics nneething)
	81
	82	(deffoo nneething-retrieve-headers (articles &optional group server fetch-old)
	83	(nneething-possibly-change-directory group)
	84
	85	(save-excursion
	86	(set-buffer nntp-server-buffer)
	87	(erase-buffer)
	88	(let* ((number (length articles))
	89	(count 0)
	90	(large (and (numberp nnmail-large-newsgroup)
	91	(> number nnmail-large-newsgroup)))
	92	article file)
	93
	94	(if (stringp (car articles))
	95	'headers
	96
	97	(while (setq article (pop articles))
	98	(setq file (nneething-file-name article))
	99
	100	(when (and (file-exists-p file)
	101	(or (file-directory-p file)
	102	(not (zerop (nnheader-file-size file)))))
	103	(insert (format "221 %d Article retrieved.\n" article))
	104	(nneething-insert-head file)
	105	(insert ".\n"))
	106
	107	(incf count)
	108
	109	(and large
	110	(zerop (% count 20))
6748645f	111	(nnheader-message 5 "nneething: Receiving headers... %d%%"
16409b0b	112	(/ (* count 100) number))))
eec82323 LMI	113
eec82323 LMI	114	(when large
6748645f	115	(nnheader-message 5 "nneething: Receiving headers...done"))
eec82323 LMI	116
	117	(nnheader-fold-continuation-lines)
	118	'headers))))
	119
	120	(deffoo nneething-request-article (id &optional group server buffer)
	121	(nneething-possibly-change-directory group)
	122	(let ((file (unless (stringp id)
	123	(nneething-file-name id)))
	124	(nntp-server-buffer (or buffer nntp-server-buffer)))
	125	(and (stringp file) ; We did not request by Message-ID.
	126	(file-exists-p file) ; The file exists.
	127	(not (file-directory-p file)) ; It's not a dir.
	128	(save-excursion
	129	(nnmail-find-file file) ; Insert the file in the nntp buf.
	130	(unless (nnheader-article-p) ; Either it's a real article...
	131	(goto-char (point-min))
16409b0b GM	132	(nneething-make-head
16409b0b GM	133	file (current-buffer)) ; ... or we fake some headers.
eec82323 LMI	134	(insert "\n"))
	135	t))))
	136
	137	(deffoo nneething-request-group (group &optional server dont-check)
	138	(nneething-possibly-change-directory group server)
	139	(unless dont-check
	140	(nneething-create-mapping)
	141	(if (> (car nneething-active) (cdr nneething-active))
	142	(nnheader-insert "211 0 1 0 %s\n" group)
	143	(nnheader-insert
	144	"211 %d %d %d %s\n"
	145	(- (1+ (cdr nneething-active)) (car nneething-active))
	146	(car nneething-active) (cdr nneething-active)
	147	group)))
	148	t)
	149
	150	(deffoo nneething-request-list (&optional server dir)
	151	(nnheader-report 'nneething "LIST is not implemented."))
	152
	153	(deffoo nneething-request-newgroups (date &optional server)
	154	(nnheader-report 'nneething "NEWSGROUPS is not implemented."))
	155
	156	(deffoo nneething-request-type (group &optional article)
	157	'unknown)
	158
	159	(deffoo nneething-close-group (group &optional server)
	160	(setq nneething-current-directory nil)
	161	t)
	162
	163	(deffoo nneething-open-server (server &optional defs)
	164	(nnheader-init-server-buffer)
	165	(if (nneething-server-opened server)
	166	t
6748645f LMI	167	(unless (assq 'nneething-address defs)
6748645f LMI	168	(setq defs (append defs (list (list 'nneething-address server)))))
eec82323 LMI	169	(nnoo-change-server 'nneething server defs)))
	170
	171	\f
	172	;;; Internal functions.
	173
	174	(defun nneething-possibly-change-directory (group &optional server)
	175	(when (and server
	176	(not (nneething-server-opened server)))
	177	(nneething-open-server server))
	178	(when (and group
	179	(not (equal nneething-group group)))
	180	(setq nneething-group group)
	181	(setq nneething-map nil)
	182	(setq nneething-active (cons 1 0))
	183	(nneething-create-mapping)))
	184
	185	(defun nneething-map-file ()
	186	;; We make sure that the .nneething directory exists.
	187	(gnus-make-directory nneething-map-file-directory)
	188	;; We store it in a special directory under the user's home dir.
	189	(concat (file-name-as-directory nneething-map-file-directory)
	190	nneething-group nneething-map-file))
	191
	192	(defun nneething-create-mapping ()
	193	;; Read nneething-active and nneething-map.
6748645f	194	(when (file-exists-p nneething-address)
eec82323	195	(let ((map-file (nneething-map-file))
6748645f	196	(files (directory-files nneething-address))
eec82323 LMI	197	touched map-files)
	198	(when (file-exists-p map-file)
	199	(ignore-errors
	200	(load map-file nil t t)))
	201	(unless nneething-active
	202	(setq nneething-active (cons 1 0)))
	203	;; Old nneething had a different map format.
	204	(when (and (cdar nneething-map)
	205	(atom (cdar nneething-map)))
	206	(setq nneething-map
	207	(mapcar (lambda (n)
	208	(list (cdr n) (car n)
	209	(nth 5 (file-attributes
	210	(nneething-file-name (car n))))))
	211	nneething-map)))
	212	;; Remove files matching the exclusion regexp.
	213	(when nneething-exclude-files
	214	(let ((f files)
	215	prev)
	216	(while f
	217	(if (string-match nneething-exclude-files (car f))
	218	(if prev (setcdr prev (cdr f))
	219	(setq files (cdr files)))
	220	(setq prev f))
	221	(setq f (cdr f)))))
16409b0b GM	222	;; Remove files not matching the inclusion regexp.
	223	(when nneething-include-files
	224	(let ((f files)
	225	prev)
	226	(while f
	227	(if (not (string-match nneething-include-files (car f)))
	228	(if prev (setcdr prev (cdr f))
	229	(setq files (cdr files)))
	230	(setq prev f))
	231	(setq f (cdr f)))))
eec82323 LMI	232	;; Remove deleted files from the map.
	233	(let ((map nneething-map)
	234	prev)
	235	(while map
16409b0b	236	(if (and (member (cadr (car map)) files)
eec82323 LMI	237	;; We also remove files that have changed mod times.
eec82323 LMI	238	(equal (nth 5 (file-attributes
16409b0b GM	239	(nneething-file-name (cadr (car map)))))
16409b0b GM	240	(cadr (cdar map))))
eec82323	241	(progn
16409b0b	242	(push (cadr (car map)) map-files)
eec82323 LMI	243	(setq prev map))
	244	(setq touched t)
	245	(if prev
	246	(setcdr prev (cdr map))
	247	(setq nneething-map (cdr nneething-map))))
	248	(setq map (cdr map))))
	249	;; Find all new files and enter them into the map.
	250	(while files
	251	(unless (member (car files) map-files)
	252	;; This file is not in the map, so we enter it.
	253	(setq touched t)
	254	(setcdr nneething-active (1+ (cdr nneething-active)))
	255	(push (list (cdr nneething-active) (car files)
	256	(nth 5 (file-attributes
	257	(nneething-file-name (car files)))))
	258	nneething-map))
	259	(setq files (cdr files)))
	260	(when (and touched
	261	(not nneething-read-only))
16409b0b	262	(with-temp-file map-file
eec82323 LMI	263	(insert "(setq nneething-map '")
	264	(gnus-prin1 nneething-map)
	265	(insert ")\n(setq nneething-active '")
	266	(gnus-prin1 nneething-active)
	267	(insert ")\n"))))))
	268
	269	(defun nneething-insert-head (file)
	270	"Insert the head of FILE."
	271	(when (nneething-get-head file)
	272	(insert-buffer-substring nneething-work-buffer)
	273	(goto-char (point-max))))
	274
	275	(defun nneething-make-head (file &optional buffer)
	276	"Create a head by looking at the file attributes of FILE."
	277	(let ((atts (file-attributes file)))
	278	(insert
	279	"Subject: " (file-name-nondirectory file) "\n"
	280	"Message-ID: <nneething-"
	281	(int-to-string (incf nneething-message-id-number))
	282	"@" (system-name) ">\n"
	283	(if (equal '(0 0) (nth 5 atts)) ""
	284	(concat "Date: " (current-time-string (nth 5 atts)) "\n"))
	285	(or (when buffer
	286	(save-excursion
	287	(set-buffer buffer)
	288	(when (re-search-forward "<[a-zA-Z0-9_]@[-a-zA-Z0-9_]>" 1000 t)
	289	(concat "From: " (match-string 0) "\n"))))
	290	(nneething-from-line (nth 2 atts) file))
	291	(if (> (string-to-int (int-to-string (nth 7 atts))) 0)
	292	(concat "Chars: " (int-to-string (nth 7 atts)) "\n")
	293	"")
	294	(if buffer
	295	(save-excursion
	296	(set-buffer buffer)
	297	(concat "Lines: " (int-to-string
	298	(count-lines (point-min) (point-max)))
	299	"\n"))
16409b0b	300	""))))
eec82323 LMI	301
	302	(defun nneething-from-line (uid &optional file)
	303	"Return a From header based of UID."
	304	(let* ((login (condition-case nil
	305	(user-login-name uid)
	306	(error
	307	(cond ((= uid (user-uid)) (user-login-name))
	308	((zerop uid) "root")
	309	(t (int-to-string uid))))))
	310	(name (condition-case nil
	311	(user-full-name uid)
	312	(error
	313	(cond ((= uid (user-uid)) (user-full-name))
	314	((zerop uid) "Ms. Root")))))
	315	(host (if (string-match "\\`/[^/@]*@\\([^:/]+\\):" file)
	316	(prog1
	317	(substring file
	318	(match-beginning 1)
	319	(match-end 1))
16409b0b GM	320	(when (string-match
16409b0b GM	321	"/\\(users\\\|home\\)/\\([^/]+\\)/" file)
eec82323 LMI	322	(setq login (substring file
	323	(match-beginning 2)
	324	(match-end 2))
	325	name nil)))
	326	(system-name))))
	327	(concat "From: " login "@" host
	328	(if name (concat " (" name ")") "") "\n")))
	329
	330	(defun nneething-get-head (file)
	331	"Either find the head in FILE or make a head for FILE."
	332	(save-excursion
	333	(set-buffer (get-buffer-create nneething-work-buffer))
	334	(setq case-fold-search nil)
16409b0b	335	(buffer-disable-undo)
eec82323 LMI	336	(erase-buffer)
	337	(cond
	338	((not (file-exists-p file))
	339	;; The file do not exist.
	340	nil)
	341	((or (file-directory-p file)
	342	(file-symlink-p file))
	343	;; It's a dir, so we fudge a head.
	344	(nneething-make-head file) t)
	345	(t
	346	;; We examine the file.
	347	(nnheader-insert-head file)
	348	(if (nnheader-article-p)
	349	(delete-region
	350	(progn
	351	(goto-char (point-min))
	352	(or (and (search-forward "\n\n" nil t)
	353	(1- (point)))
	354	(point-max)))
	355	(point-max))
	356	(goto-char (point-min))
	357	(nneething-make-head file (current-buffer))
	358	(delete-region (point) (point-max)))
	359	t))))
	360
	361	(defun nneething-file-name (article)
	362	"Return the file name of ARTICLE."
16409b0b GM	363	(let ((dir (file-name-as-directory nneething-address))
	364	fname)
	365	(if (numberp article)
	366	(if (setq fname (cadr (assq article nneething-map)))
	367	(expand-file-name fname dir)
3efe5554	368	(mm-make-temp-file (expand-file-name "nneething" dir)))
16409b0b	369	(expand-file-name article dir))))
eec82323 LMI	370
	371	(provide 'nneething)
	372
ab5796a9	373	;;; arch-tag: 1277f386-88f2-4459-bb24-f3f45962a6c5
eec82323	374	;;; nneething.el ends here