Dired Extra Version 2 User's Manual. Node: Shell Command Guessing
Chapter 5: Shell Command Guessing
Based upon the name of a filename, Dired tries to guess what shell
command you might want to apply to it. For example, if you have point
on a file named `
foo.tar' and you press !, Dired will guess
you want to `
tar xvf' it and suggest that as the default shell
The default will be mentioned in brackets and you can type M-p to get
the default into the minibuffer so that you can edit it, e.g., changing
tar xvf' to `
tar tvf'. If there are several commands for a given
file, e.g., `
xtex' and `
dvips' for a `
.dvi' file, you can type
M-p several times to see each of the matching commands.
Dired only tries to guess a command for a single file, never for a list
of marked files.
Predefined rules for shell commands. Set this to
nil to turn guessing off.
The elements of
dired-guess-shell-alist-user (defined by the
user) will override these rules.
nil, a user-defined alist of file regexps and their suggested
commands. These rules take precedence over the predefined rules in the
dired-guess-shell-alist-default (to which they are prepended)
dired-do-shell-command is run).
Each element of the alist looks like
where each command can either be a string or a lisp expression
that evaluates to a string. If several COMMANDs are given, all
will temporarily be pushed on the history.
You can set this variable in your `
~/.emacs'. For example,
to add rules for `
.foo' and `
.bar' file extensions, write
(list "\\.foo$" "foo-command");; fixed rule
;; possibly more rules...
(list "\\.bar$";; rule with condition test
This will override any predefined rules for the same extensions.
nil, name of the GNU tar executable (e.g., `
"gnutar"'). GNU tar's `
z' switch is used for compressed tar files.
If you don't have GNU tar, set this to
nil: a pipe using `
nil value means that
-q is passed to gzip overriding a
verbose GNU zip's `
GZIP' environment variable.
A string of switches passed to GNU zip's `
znew'. An example is
"-K"' which will make `
znew' keep a .Z file when it is smaller than
the .gz file.
History list for commands that read dired-shell commands.