[வியாழன் மே 09, 2024] Visuwesh wrote:

>>> > I don't think I understand this difficulty, either: with
>>> > occur-edit-mode it is solved by making occur-edit-mode be derived from
>>> > occur-mode.  Couldn't you do the same with your mode?
>>> 
>>> No because occur-mode makes occur-revert-arguments permanent-local so
>>> `g' survives the major-mode changes.
>>> 
>>> For revert-buffer alone, compilation-arguments needs to be marked
>>> permanent-local.  As it is a part of compile.el, I am not sure if
>>> marking it as such is safe.  This is why I think having a minor-mode is
>>> better.
>>
>> It sounds like a minor issue which shouldn't have such grave
>> consequences.  Why do you think making compilation-arguments
>> permanent-local would be a problem?  We could ask people who
>> frequently contribute to compile.e land grep.el if they see any
>> problem with doing that.
>
> It feels like a potential far-fetching change.  But in any case, I will
> give a shot at recreating the required markers, etc. for
> occur-after-change-function to work.  Will send a patch once I have a
> working prototype.

OK, please find attached patch.  I am still not using a major-mode
because of the change-major-mode-hook in compilation-setup:

    (add-hook 'change-major-mode-hook #'compilation--remove-properties nil t)

that strips off all the text-properties.  And there seem to be too many
important local variables that is set up by both grep.el and compile.el
so I think it is easier to use a minor-mode here.