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Re: [Qemu-trivial] [Qemu-devel] [PATCH v2] Add .dir-locals.el file to co

From: Eric Blake
Subject: Re: [Qemu-trivial] [Qemu-devel] [PATCH v2] Add .dir-locals.el file to configure emacs coding style
Date: Tue, 15 Sep 2015 09:31:08 -0600
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.2.0


On 08/24/2015 06:15 PM, John Snow wrote:
> On 06/18/2015 10:05 AM, Markus Armbruster wrote:
>> Peter Maydell <address@hidden> writes:
>>> On 18 June 2015 at 10:28, Markus Armbruster <address@hidden> wrote:
>>>> However, I can't see how I could define a new C style there without
>>>> pushing the "local variables" feature well beyond its intended use, and
>>>> triggering the confirmation prompts.
>>> We wouldn't want to define a new C style, but in general the items
>>> I have in my config over the Stroustrup defaults are going to be there
>>> because I've noticed something where Stroustrup doesn't indent right...
>> As far as I can see, the difference bwteen stroustrup style and yours is
>> a few tweaks to c-offsets-alist and c-hanging-braces-alist.  I'm not
>> sure how to do that from .dir-locals.el.
>>>> If we take Dan's patch, every Emacs user who hasn't already configured a
>>>> suitable style profits.  Users who have may have to adjust their
>>>> configuration to work with or around Dan's patch.
>>> Is there some way to tell whether your emacs has picked up the local
>>> style info rather than the one you have in your .emacs ?
>> The obvious way is to check the buffer-local variables.  Buffer-local
>> variable c-indentation-style is the name of the style in use.  Without
>> anything in .emacs or local variables, it's "gnu".  With your
>> (c-add-style "qemu" qemu-c-style) in .emacs, it should be "qemu".  With
>> Dan's .dir-locals.el, it should be "stroustrup".
>> When you can't or don't want to create or modify a .dir-locals.el, you
>> can do something like this instead:
>>     (dir-locals-set-class-variables 'qemu '((c-mode . ((c-file-style . 
>> "qemu")))))
>>     (dir-locals-set-directory-class "~/work/qemu" 'qemu)
>> This *overrides* .dir-locals.el in my testing.
> ping -- any love for this for 2.5?

Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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