How to open some files based on extension rather than mime type?

[John Hupp]

I found a few more things pcmanfm is NOT looking at by default.

Since LXDE also implements some MIME support, I changed the 
document/installed setting to put libreoffice-writer before abiword in 
~/.config/lxsession/Lubuntu/desktop.conf and 
~/.config/lxsession-default-apps/settings.conf.  I rebooted, and neither 
setting caused pcmanfm to open an ODT with LibreOffice.

Since Lubuntu uses the Debian alternatives system to set the default web 
browser, I thought it possible that it might do the same for the default 
word processor.  I had a look through /etc/alternatives but didn't find 
any candidates there.

And since I had seen an old Firefox bug report where it was looking at 
/usr/share/applications/mimeinfo.cache, I also played with the relevant 
mime type there, also to no effect.

--JDH

On 1/21/2015 9:59 AM, Israel wrote:
> Hi,
> I want to look into it more.
> I was just posting more information for anyone who is following this 
> thread, and for my own information, as well.
> I will try to test this soon.  In 12.04 defaults.list does indeed work 
> with pcmanfm, mimeapps.list would not work (of course). the place to 
> look (or ask) might be on the LXDE github
> I'm sure PCMan knows how to support this action.  Of course it could 
> also be some patch that is added in by Julian in the packaging (or 
> left over from ealier versions), but that is just a guess.
> If I get time today I'll pop in on github and look around, and maybe 
> ask what the preferred placement is.
> This may actually be a bug...
>
> On 01/21/2015 08:47 AM, John Hupp wrote:
>> In my very modest test using a /etc/xdg/lubuntu/mimeapps.list (a 
>> location provided by $XDG_CONFIG_DIRS) to associate the ODT mime type 
>> with LibreOffice Writer, pcmanfm did not respect that.  It still 
>> opened an ODT file with AbiWord.
>>
>> It seemed to me that Lubuntu 14.04 was not respecting either 
>> /usr/share/applications/defaults.list or the new spec, but my testing 
>> was very far from exhaustive.  In fact, I stopped at a point of 
>> puzzlement over what pcmanfm was reading to get its default file 
>> associations.
>>
>> Did you find that Lubuntu 14.04 (or perhaps 14.10?) is supporting the 
>> new spec in part or in whole?  Or are you just saying that you want 
>> to look into it more?
>>
>> On 1/21/2015 8:15 AM, Israel wrote:
>>>
>>> Hi John,
>>> Thanks for finding this!!
>>> I will have to experiment with using mimeapps.list some.
>>> For all who are interested here is the spec...
>>>
>>> $XDG_CONFIG_HOME/$desktop-mimeapps.list 	user overrides, 
>>> desktop-specific (for advanced users)
>>> $XDG_CONFIG_HOME/mimeapps.list 	user overrides (recommended location 
>>> for user configuration GUIs)
>>> $XDG_CONFIG_DIRS/$desktop-mimeapps.list 	sysadmin and ISV overrides, 
>>> desktop-specific
>>> $XDG_CONFIG_DIRS/mimeapps.list 	sysadmin and ISV overrides
>>> $XDG_DATA_HOME/applications/$desktop-mimeapps.list 	for 
>>> completeness, deprecated, desktop-specific
>>> $XDG_DATA_HOME/applications/mimeapps.list 	for compatibility, 
>>> deprecated
>>> $XDG_DATA_DIRS/applications/$desktop-mimeapps.list 
>>> distribution-provided defaults, desktop-specific
>>> $XDG_DATA_DIRS/applications/mimeapps.list 	distribution-provided 
>>> defaults
>>>
>>>
>>>
>>> Based on that I think you should save the file as (for local users):
>>> ~/mimeapps.list
>>> ~/lubuntu-mimeapps.list (mayeb lxde??)
>>>
>>>
>>> then run
>>> echo $XDG_CONFIG_DIRS
>>> if you want to find the specific global directories to change the
>>> ## I am using an array here below to indicate you can *probably* use 
>>> any directory listed)
>>> ${XDG_CONFIG_DIRS[*1*]}*/mimeapps.list*
>>> or one of these:
>>> lubuntu-mimeapps.list
>>> lxde-mimeapps.list
>>>
>>>
>>> On 01/20/2015 05:06 PM, John Hupp wrote:
>>>> I was looking at this further, and found out that 
>>>> /usr/share/applications/defaults.list was officially deprecated in 
>>>> 4/14.  See, for instance, 
>>>> https://mail.gnome.org/archives/distributor-list/2015-January/msg00000.html 
>>>> and also the current spec at 
>>>> http://standards.freedesktop.org/mime-apps-spec/mime-apps-spec-latest.html 
>>>> which instead specifies the use of a mimeapps.list at one location 
>>>> or another.
>>>>
>>>> Lubuntu 14.04 seems to implement some sort of mixture of the 
>>>> deprecated and current spec.  I have not been able to pin it down 
>>>> with precision.
>>>>
>>>> The LibreOffice installation wrote a full complement of mime type 
>>>> associations to /usr/share/applications/defaults.list.  But PCmanFM 
>>>> does not look at that -- it opens an ODT file with AbiWord.  I have 
>>>> yet to figure out what it looks at by default. Anyone know?
>>>>
>>>> If I R-click on a file: Open With and check the box to make the 
>>>> current app the default for opening the file, then PCmanFM writes 
>>>> to ~/.local/share/applications/mimeapps.list with the minimal 
>>>> entries required to set the desired mime type association.  And 
>>>> then for the current user, ODT files open with LibreOffice.
>>>>
>>>> Oddly enough, though PCmanFM writes to a mimeapps.list (named per 
>>>> the new spec), ~/.local/share/applications is not one of the lookup 
>>>> locations in the new spec.
>>>>
>>>> I copied ~/.local/share/applications/mimeapps.list to 
>>>> /etc/xdg/lubuntu/, which is a lookup location in the new spec.  
>>>> Then I created a new user and found that my global mimeapps.list 
>>>> was ineffective.
>>>> ....
>>>>> -- 
>>>>> Regards
>>>>>
>>>>>
>>>>
>>>
>>>
>>> -- 
>>> Regards
>>
>
>
> -- 
> Regards

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