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Re: why is dash confused with underscore in autocompletion?

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  Re: why is dash confused with underscore in autocompletion? Eric Blake <eblake@redhat.com> - 2018-05-29 16:50 -0500

#14165 — Re: why is dash confused with underscore in autocompletion?

On 05/29/2018 04:32 PM, L A Walsh wrote:

> I'd expect it to autocomplete the entire filename for
> 'remove-oldver-rpms-in-dir.pl' since it is the only file with a dash
> after 'remove', but instead, bash prompts me again as though there
> is some ambiguity between a dash and an underline.

When you have case-insensitive completion, I _like_ having - and _ be 
treated as case-insensitive counterparts (at least on US keyboards, 
those two symbols are on the same key, and differ only on whether you 
used shift, the same as other case-insensitive comparisons such as b/B).

> 
> But there isn't. Indeed, adding a '*' after the dash and ENTER, and
> ls shows only 1 file.
> 
> Is there some setting I've forgotten I've set that is enabling this
> behavior?  I can't think of why I'd want it, since I really do want
> it to complete the 1st filename.  It also doesn't limit the words to
> ones w/underscore after 'remove' if I add '_', it still lists
> 'remove-old...' as a completion option.
> 
> So why is this happening and how can I turn it off?

Readline documents 'completion-map-case' and 'completion-ignore-case' as 
the two knobs used to fine-tune whether you are doing case-insensitive 
completion, and if so, whether -/_ are part of that case-insensitivity.

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org

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