On Wednesday, March 1, 2017 at 7:52:26 AM UTC, Jeroen Demeyer wrote:
>
> I have been thinking about this too. My personal conclusion was that the 
> "type" enumeration (standard, optional, experimental, pip, script) is 
> simply too restricted and that we need additional metadata with more 
> degrees of freedom. 
>
> Currently, the "type" field is relevant for: 
> - which packages are installed by default 
> - which packages should be packed in the source tarball 
> - which --optional tags are given when doctesting 
> - whether a warning message is given when installing the package 
> - the Make rules of a package 
> - the automatic dependencies of a package 
>
> I think that's bordering on being too much already. So +1 to more 
> metadata but -1 to inventing yet another type. 
>

Probably one can have an optional `replacements` file
in the package directory of each package that can be replaced by some 
others; or,
in build/packages/, a file named `alternatives` listing alternative 
packages, e.g.

altas openblas
foo bar baz
... <another list of alternatives>...
...






 

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