diff options
Diffstat (limited to 'lisp/files.el')
| -rw-r--r-- | lisp/files.el | 47 |
1 files changed, 46 insertions, 1 deletions
diff --git a/lisp/files.el b/lisp/files.el index 4d27ef16f7..1d7870be48 100644 --- a/lisp/files.el +++ b/lisp/files.el @@ -1314,6 +1314,36 @@ Optional second argument FLAVOR controls the units and the display format: (car post-fixes)) (if (eq flavor 'iec) "iB" "")))) +(defcustom mounted-file-systems + (if (memq system-type '(windows-nt cygwin)) + "^//[^/]+/" + ;; regexp-opt.el is not dumped into emacs binary. + ;;(concat + ;; "^" (regexp-opt '("/afs/" "/media/" "/mnt" "/net/" "/tmp_mnt/")))) + "^\\(?:/\\(?:afs/\\|m\\(?:edia/\\|nt\\)\\|\\(?:ne\\|tmp_mn\\)t/\\)\\)") + "File systems which ought to be mounted." + :group 'files + :version "25.2" + :require 'regexp-opt + :type 'regexp) + +(defun temporary-file-directory () + "The directory for writing temporary files. +In case of a remote `default-directory', this is a directory for +temporary files on that remote host. If such a directory does +not exist, or `default-directory' ought to be located on a +mounted file system (see `mounted-file-systems'), the function +returns `default-directory'. +For a non-remote and non-mounted `default-directory', the value of +the variable `temporary-file-directory' is returned." + (let ((handler (find-file-name-handler + default-directory 'temporary-file-directory))) + (if handler + (funcall handler 'temporary-file-directory) + (if (string-match mounted-file-systems default-directory) + default-directory + temporary-file-directory)))) + (defun make-temp-file (prefix &optional dir-flag suffix) "Create a temporary file. The returned file name (created by appending some random characters at the end @@ -1350,6 +1380,21 @@ If SUFFIX is non-nil, add that at the end of the file name." nil) file))) +(defun make-nearby-temp-file (prefix &optional dir-flag suffix) + "Create a temporary file as close as possible to `default-directory'. +If PREFIX is a relative file name, and `default-directory' is a +remote file name or located on a mounted file systems, the +temporary file is created in the directory returned by the +function `temporary-file-directory'. Otherwise, the function +`make-temp-file' is used. PREFIX, DIR-FLAG and SUFFIX have the +same meaning as in `make-temp-file'." + (let ((handler (find-file-name-handler + default-directory 'make-nearby-temp-file))) + (if (and handler (not (file-name-absolute-p default-directory))) + (funcall handler 'make-nearby-temp-file prefix dir-flag suffix) + (let ((temporary-file-directory (temporary-file-directory))) + (make-temp-file prefix dir-flag suffix))))) + (defun recode-file-name (file coding new-coding &optional ok-if-already-exists) "Change the encoding of FILE's name from CODING to NEW-CODING. The value is a new name of FILE. @@ -4404,7 +4449,7 @@ ignored." (defun normal-backup-enable-predicate (name) "Default `backup-enable-predicate' function. Checks for files in `temporary-file-directory', -`small-temporary-file-directory', and /tmp." +`small-temporary-file-directory', and \"/tmp\"." (let ((temporary-file-directory temporary-file-directory) caseless) ;; On MS-Windows, file-truename will convert short 8+3 aliases to |