[experimental] Updated: readline-6.1.2-1, libreadline7-6.1.2-1

[experimental] Updated: readline-6.1.2-1, libreadline7-6.1.2-1

[Eric Blake (cygwin)]

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A new release 6.1.2-1 for readline and libreadline7 is now available for
testing, while leaving 6.0.3-2 as current.

NEWS:
=====
This is a test release of a new upstream release.  I'm working on
preparing bash 4.1 for cygwin, which requires a newer readline package;
once that is working, I will promote this package to current.  Use of
this update requires libgcc1 and libncurses10 (setup.exe doesn't make it
easy to list different dependencies for a test package than for the
current package).  See also the upstream documentation in
/usr/share/doc/readline/.

NOTES:
======
Be aware that an issue with offering libreadline as both a static and
dynamic library has been identified - some functions, such as
rl_function_of_keyseq, cannot work correctly with both library styles
without some additional __declspec decoration in the dynamic case.  This
release caters to static compilation (and packages like bash that use
the problematic functions from dynamic readline have to add a minimal
workaround); it is possible that a future package will either be
dynamic-only, or that compiling against the static readline-6.0 will
require the declaration of a preprocessor macro, so that dynamic linking
works without requiring patches to every client.

DESCRIPTION:
============
The readline library will read a line from the terminal and return it,
allowing the user to edit the line with emacs or vi editing keys.  It
also allows a history feature, for editing previous entries, making
command line interfaces easier-to-use and more intuitive.

libreadline7 provides the .dlls needed for readline and history
expansion for dynamic linking in other programs, including bash and gdb;
it is required for a minimal cygwin installation.  The 7 in libreadline7
distinguishes incompatible API changes made to the prior libreadline5
and libreadline6 libraries still available on the mirrors. readline
provides the documentation and the static libraries required for static
linking; you should only need it if you plan on compiling an application
that links with -lreadline or -lhistory.

UPDATE:
=======
To update your installation, click on the "Install Cygwin now" link on
the http://cygwin.com/ web page.  This downloads setup.exe to your
system. Save it and run setup, answer the questions and pick up
'libreadline7' from the 'Base' category (it should already be selected),
or 'readline' in the 'Devel' category.  Since this is an experimental
release, you will need to use the 'Exp' radio button to get access to
this version.  Be sure that you do not have any cygwin programs running
during the upgrade.

DOWNLOAD:
=========
Note that downloads from cygwin.com aren't allowed due to bandwidth
limitations.  This means that you will need to find a mirror which has
this update, please choose the one nearest to you:
http://cygwin.com/mirrors.html

QUESTIONS:
==========
If you want to make a point or ask a question the Cygwin mailing list is
the appropriate place.

-- 
Eric Blake
volunteer cygwin readline maintainer

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This document details the changes between this version, readline-6.1,
and the previous version, readline-6.0.

1.  Changes to Readline

a.  The SIGWINCH signal handler now avoids calling the redisplay code if
    one arrives while in the middle of redisplay.

b.  Changes to the timeout code to make sure that timeout values greater
    than one second are handled better.

c.  Fixed a bug in the redisplay code that was triggered by a prompt
    containing invisible characters exactly the width of the screen.

d.  Fixed a bug in the redisplay code encountered when running in horizontal
    scroll mode.

e.  Fixed a bug that prevented menu completion from properly completing
    filenames.

f.  Fixed a redisplay bug caused by a multibyte character causing a line to
    wrap.

g.  Fixed a bug that caused key sequences of two characters to not be
    recognized when a longer sequence identical in the first two characters
    was bound.

h.  Fixed a bug that caused history expansion to be attempted on $'...'
    single-quoted strings.

i.  Fixed a bug that caused incorrect redisplay when the prompt contained
    multibyte characters in an `invisible' sequence bracketed by \[ and
    \].

j.  Fixed a bug that caused history expansion to short-circuit after
    encountering a multibyte character.

k.  Fixed a bug that caused applications using the callback interface to not
    react to SIGINT (or other signals) until another character arrived.

2.  New Features in Readline

a.  New bindable function: menu-complete-backward.

b.  In the vi insertion keymap, C-n is now bound to menu-complete by default,
    and C-p to menu-complete-backward.

c.  When in vi command mode, repeatedly hitting ESC now does nothing, even
    when ESC introduces a bound key sequence.  This is closer to how
    historical vi behaves.

d.  New bindable function: skip-csi-sequence.  Can be used as a default to
    consume key sequences generated by keys like Home and End without having
    to bind all keys.

e.  New application-settable function: rl_filename_rewrite_hook.  Can be used
    to rewite or modify filenames read from the file system before they are
    compared to the word to be completed.

f.  New bindable variable: skip-completed-text, active when completing in the
    middle of a word.  If enabled, it means that characters in the completion
    that match characters in the remainder of the word are "skipped" rather
    than inserted into the line.

g.  The pre-readline-6.0 version of menu completion is available as
    "old-menu-complete" for users who do not like the readline-6.0 version.

h.  New bindable variable: echo-control-characters.  If enabled, and the
    tty ECHOCTL bit is set, controls the echoing of characters corresponding
    to keyboard-generated signals.

i.  New bindable variable: enable-meta-key.  Controls whether or not readline
    sends the smm/rmm sequences if the terminal indicates it has a meta key
    that enables eight-bit characters.

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