Re: How to simulate a real checkout to test a new smudge filter?

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On 9/8/16, Jakub Narębski <jnareb@xxxxxxxxx> wrote:
> W dniu 06.09.2016 o 23:01, john smith pisze:
>
>> I'd prefer smudge/clean filters instead of `make' scripts etc. to
>> convert template dotfiles into something usable and back because
>> filters:
>>
>> 1. could be run automatically
>>
>> 2. do not modify files as shown by `git show HEAD:<file>' and
>> therefore no files are reported as modified by git status and also
>> there are not conflicts when merging master into work/home branch.
>>
>> I have problems because with point 1 because apparently smudge filter
>> is not run automatically every time when branch is changed if files
>> listed in .gitattributes do not change. As the last resort I could
>> force smudge/clean filter to run just to keep advantage specified in
>> point 2.
>
> Couldn't you use post-checkout hook plus clean filter instead of
> clean/smudge filter pair, if the smudge part depends on the branch?
>
> Or make post-checkout hook invoke smudge filter... though
> `git cat-file --filters` is not in any released version, I think...

I moved smudge-filter functionality to post-checkout hook and only
left clean filter. Now post-checkout hooks is called every time when
changing branches but it's not working together with clean filter when
changing branches.  For example, when I have this on master in
bash/.bashrc:

export EMAIL="@EMAIL@"

After moving to `work' it becomes this thanks to post-checkout hook
which replaces @EMAIL@ with correct definition:

export EMAIL="work@xxxxxxxxxxx"

But when I move to `home' branch from `work' I still get this:

export EMAIL="work@xxxxxxxxxxx"

post-checkout didn't work here because it can't see @EMAIL@ part in
bash/.bashrc because clean filter has not been run. I need to run this
single command to force `clean' filter to run to replace
work@xxxxxxxxxxx with @EMAIL@ and let post-checkout replace it with
correct value:

git checkout .

And now I get the correct definition:

export EMAIL="home@xxxxxxxxxxx"

So it seems that clean filter is only run when checking out paths but
not when checking out branches.  Is my thinking correct?
-- 
<wempwer@xxxxxxxxx>




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