Re: [MirageOS-devel] removal of deprecated config in mirage 3.0 (mirage configure --unix/--xen, add_to_opam_packages, add_to_libraries)

[Mindy <mindy@xxxxxxxxxxxxxxxxxxx>]

On 07/19/2016 12:56 PM, Amir Chaudhry wrote:
> I’ve no problem with those flags going away, but I do think it’s important that we consider how.  There may 
> be lots of blog posts/videos out there with the old way of doing it and I don’t think we’ve communicated 
> enough that this is deprecated.  I’m not sure how many people will have read Functoria’s docs :)  This may 
> also be why they keep creeping back into mirage-skeleton.
>
> Some suggestions which might mitigate later confusion:
>
> - Add a note to the breaking-changes page now to highlight this actually is 
> deprecated. It clearly mentions other things but not this change.
I don't want to do this because we haven't yet released the version that 
actually breaks this for users.  Right now, anyone who is using a 
version of `mirage` that no longer supports this has opted into the 
pre-release 3.0 universe of packages, and is coping with a set of 
breaking changes that's larger than just this one.
The deprecation of --unix and --xen is actually already noted on this 
page in the "Deprecation" section, alongside add_to_ocamlfind_libraries 
and add_to_opam_packages, but concluding this from the "`get_mode` is 
deprecated" written there requires some knowledge of Functoria.  I'll 
add a line that makes this more clear.
> - If possible, add some kind of warning in the tool soon (as previously 
> suggested). Would a point release work for this (2.9.1)?
Have a look at https://github.com/mirage/mirage/pull/561 .  Since it 
changes only the front-end tool, it can be released relatively speedily.
> I think this is has enough impact that we should try to forewarn users now if we can (especially if 
> they’ve already been deprecated). I’m assuming the above points wouldn’t have any 
> (negative) impact on the work for 3.0 but please correct me if I’m mistaken.
>
> Thoughts?
>
> Amir

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