Mail Archives: cygwin/2000/02/07/17:33:17
;;; cygwin32-mount.el --- Teach EMACS about cygwin32 mount points.
;;; Michael Cook <mcook AT cognex DOT com>.
;;; modified Jun 18 1998 by Keisuke Mori <ksk AT ntts DOT com>
;;; to make it work with ange-ftp and enable mapping a drive letter
;;; modified Oct 25 1999 by Drew Moseley (drewmoseley AT mindspring DOT com)
;;; to support /cygdrive style drive maps and for better coexistence
;;; with ange-ftp.
;;; modified Feb 7 2000 by James Ganong (jeg AT bigseal DOT ucsc DOT edu)
;;; to work when / is mounted in a subdirectory instead of top level of a drive
;;; and to check longest directory names first, to a / mount does not shadow
(defun cygwin32-mount-build-table ()
;; Determine the cygwin mount points.
(let ((buf (get-buffer-create " *mount*"))
(case-fold-search t)
mounts)
(save-excursion
(set-buffer buf)
(erase-buffer)
(call-process "mount" nil t)
; first pass tags each line with the length of the directory
(goto-char (point-min))
(while (search-forward-regexp
"^\\([a-z]:[^ \t\n]*\\) +\\([^ \t\n]+\\)" nil t)
(let ((device (buffer-substring (match-beginning 1)
(match-end 1)))
(direct (file-name-as-directory (buffer-substring (match-beginning 2)
(match-end 2)))))
(end-of-line) (insert ( format "\t%d" (length direct )))
))
; now sort the lines numerically
(sort-numeric-fields -1 (point-min) (point-max))
; 2nd pass builds the mount list
(goto-char (point-min))
(while (search-forward-regexp
"^\\([a-z]:[^ \t\n]*\\) +\\([^ \t\n]+\\)" nil t)
(let ((device (buffer-substring (match-beginning 1)
(match-end 1)))
(direct (file-name-as-directory(buffer-substring (match-beginning 2)
(match-end 2)))))
(setq mounts (cons (cons device direct)
mounts))))
)
(kill-buffer buf)
mounts))
(defvar cygwin32-mount-table (cygwin32-mount-build-table)
"Alist of cygwin32 mount points.")
(or (assoc "^/[^:@]*$\\|[^/:]+\\(\\'\\|/\\)" file-name-handler-alist)
(setq file-name-handler-alist
(cons '("^/[^:@]*$\\|^/|/[^/:]+\\(\\'\\|/\\)" . cygwin32-mount-name-hook-function)
file-name-handler-alist)))
(or (assoc "^//[A-Za-z]/" file-name-handler-alist)
(setq file-name-handler-alist
(cons '("^//[A-Za-z]/" . cygwin32-mount-map-drive-hook-function)
file-name-handler-alist)))
;;; Support cygdrive style drive maps.
(or (assoc "^/cygdrive/[A-Za-z]" file-name-handler-alist)
(setq file-name-handler-alist
(cons '("^/cygdrive/[A-Za-z]" . cygwin32-mount-map-drive-hook-function)
file-name-handler-alist)))
(defun cygwin32-mount-name-hook-function (operation &rest args)
(let ((fn (get operation 'cygwin32-mount-name)))
(if fn (apply fn operation args)
(cygwin32-mount-run-real-handler operation args))))
(defun cygwin32-mount-map-drive-hook-function (operation &rest args)
(let ((fn (get operation 'cygwin32-mount-map-drive)))
(if fn (apply fn operation args)
(cygwin32-mount-run-real-handler operation args))))
(defun cygwin32-mount-run-real-handler (operation args)
(let ((inhibit-file-name-handlers
(cons 'cygwin32-mount-name-hook-function
(cons 'cygwin32-mount-map-drive-hook-function
(and (eq inhibit-file-name-operation operation)
inhibit-file-name-handlers))))
(inhibit-file-name-operation operation))
(apply operation args)))
;;;
;;; Unbound the ange-ftp-run-real-handler and rebind it to ours
;;; This version also inhibits the cygwin file name expansion when
;;; we are doing ange-ftp expansion.
;;;
;;; This is a real hack. If the real definition of this function
;;; changes, we have to modify this function
;;;
(require 'ange-ftp)
(if (fboundp 'ange-ftp-run-real-handler)
(fmakunbound 'ange-ftp-run-real-handler))
(defun ange-ftp-run-real-handler (operation args)
(let ((inhibit-file-name-handlers
(cons 'ange-ftp-hook-function
(cons 'ange-ftp-completion-hook-function
(cons 'cygwin32-mount-name-hook-function
(cons 'cygwin32-mount-map-drive-hook-function
(and (eq inhibit-file-name-operation operation)
inhibit-file-name-handlers))))))
(inhibit-file-name-operation operation))
(apply operation args)))
(put 'substitute-in-file-name 'cygwin32-mount-name 'cygwin32-mount-name-expand)
(put 'expand-file-name 'cygwin32-mount-name 'cygwin32-mount-name-expand)
(put 'substitute-in-file-name
'cygwin32-mount-map-drive 'cygwin32-mount-map-drive)
(put 'expand-file-name 'cygwin32-mount-map-drive 'cygwin32-mount-map-drive)
(require 'cl)
(defun cygwin32-mount-name-expand (operation name &rest args)
;; If NAME uses a mount directory, substitute the mount device
;; and return the resulting string. Otherwise, return NAME.
(let ((mounts cygwin32-mount-table)
(len (length (file-name-as-directory name)))
match)
(while mounts
(let ((mount (file-name-as-directory (cdar mounts))))
(and (>= len (length mount))
(string= mount (file-name-as-directory(substring (file-name-as-directory name) 0 (length mount))))
(or (null match)
(> (length (cdar mounts)) (length (cdr match))))
(setq match (car mounts))))
(setq mounts (cdr mounts)))
(if match
(concat (file-name-as-directory (car match))
(substring name (length (file-name-as-directory (cdr match)))))
(cygwin32-mount-run-real-handler operation (cons name args)))))
(defun cygwin32-mount-map-drive (operation name &rest args)
;; NAME must have the format looks like "^//[A-Za-z]/" here.
;; Support cygdrive style drive maps.
(cygwin32-mount-run-real-handler
operation
(if (string-equal (substring name 0 2) "//")
(cons (concat (substring name 2 3) ":" (substring name 3 nil))
args)
(cons (concat (substring name 10 11) ":" (substring name 11 nil))
args)
)
)
)
(provide 'cygwin32-mount)
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