Re: dired-do-shell-command needs minibuffer completion

[jidanni]

>> ! runs the command dired-do-shell-command
>> Well, it could certainly use the same completion list for command
>> names as comint-dynamic-complete. Currently TAB at its prompt just
>> does self-insert-command.

DA> What you want is to be able to complete against the history of
DA> shell commands used in Dired, `dired-shell-command-history': to
DA> reuse a previous command, possibly editing it first. Right?

No, not that fancy: all I know is that the first word entered when
using ! (dired-do-shell-command) must be a file on $PATH, so hitting
TAB should expand on all the executable filenames in /usr/bin/ etc.
for that first word.