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Re: History expansion in multiline string, within single quote


From: Chet Ramey
Subject: Re: History expansion in multiline string, within single quote
Date: Thu, 9 Aug 2018 10:32:34 -0400
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:52.0) Gecko/20100101 Thunderbird/52.9.1

On 8/9/18 3:47 AM, address@hidden wrote:

> Bash Version: 4.4 
> Patch Level: 12 
> Release Status: release 
> 
> Description: 
> Bug happens in an interactive shell. 
> 
> this works as expected, no history expansion : 
> echo "foo"'!bar'"qux" 
> 
> but this fails, bash tries to hist-expand !bar', which it should not. 
> echo "foo 
> "'!bar'"qux" 
> 
> -bash: !bar': event not found 
> 
> I just compiled bash 4.4.18 and tested, the bug is there too. 

Since the history library is explicitly line-oriented, and independent of
the shell, there hasn't been a clean way to inform it about any quoting
state the current line should inherit.

I added an experimental new state variable that will appear in
readline-8.0-beta that should allow applications to communicate this
state to the history library. We'll see how it works.

Chet
-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    address@hidden    http://tiswww.cwru.edu/~chet/



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