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bug#31496: 26.1; support "**" globbing in filename completion


From: Tom Tromey
Subject: bug#31496: 26.1; support "**" globbing in filename completion
Date: Fri, 18 May 2018 09:35:04 -0600

Bash has a "**" globbing feature (you have to set "globstar" to get
this) for recursive globbing.  "**" will recursively match
subdirectories.

This would be handy for filename completion in Emacs.
Then finding a file somewhere in some subdirectory would be as easy as

C-x C-f **/filename TAB





In GNU Emacs 26.1 (build 2, x86_64-pc-linux-gnu, GTK+ Version 3.22.26)
 of 2018-05-11 built on pokyo
Repository revision: c9c0e40d673a5fc0d24d30ff67ccb7c7f2fb482a
Windowing system distributor 'Fedora Project', version 11.0.11906000
System Description:     Fedora release 27 (Twenty Seven)

Recent messages:
Auto-saving...done
Mark set [2 times]
Mark popped
Mark set
Sending...
Mark set [2 times]
Sending via mail...
Sending email 
Sending email done
Sending...done

Configured using:
 'configure --prefix=/home/tromey/Emacs/install --with-modules'

Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND DBUS GSETTINGS NOTIFY
LIBSELINUX GNUTLS LIBXML2 FREETYPE LIBOTF XFT ZLIB TOOLKIT_SCROLL_BARS
GTK3 X11 MODULES THREADS LIBSYSTEMD LCMS2

Important settings:
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix

Major mode: Python

Minor modes in effect:
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  column-number-mode: t
  line-number-mode: t
  auto-fill-function: do-auto-fill
  transient-mark-mode: t

Load-path shadows:
/home/tromey/.emacs.d/elpa/bubbles-0.5/bubbles hides 
/home/tromey/Emacs/install/share/emacs/26.1/lisp/play/bubbles

Features:
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make-network-process emacs)

Memory information:
((conses 16 2800184 303048)
 (symbols 48 121031 6)
 (miscs 40 37588 11211)
 (strings 32 469669 57207)
 (string-bytes 1 12187759)
 (vectors 16 162560)
 (vector-slots 8 3063660 200418)
 (floats 8 602 709)
 (intervals 56 264325 7696)
 (buffers 992 263))





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