On 2016-08-18 00:02, Simon King wrote:
Slightly elaborating on my suggestion: Split the code from the old-style
p_group_cohomology-2.1.6.spkg into four parts, namely
1. an optional package "meataxe", which provides a C library and some
executables and which is *not* a Python package. It is useful for
Sage's matrix arithmetic and thus is wrapped by OptionalExtension
in the Sage library
Obviously, it would be better if you could just use the "official"
meataxe package, not Simon King's personal copy. But I understand that
this might not be possible.
2. an optional package "modular_resolution", which depends on meataxe,
provides a C library and some executables, which is *not* a Python
package and which is of no use without 3. and 4.
Right. So meataxe and modular_resolution will then be "autotools"
packages, I suppose?
3. Gap and Singular library functions, that certainly should be installed
into SAGE_ROOT/src/ext/gap resp. .../singular (should it not?), and a
data-base of cohomology rings
Again, packages should not install stuff in the Sage sources. Especially
because your package seems useful even without Sage.
Does a concept of "GAP packages" and "Singular packages" exist? If so,
you should follow recommendations for those kinds of packages to install
your GAP/Singular code.
If you really have no idea what to do, install the code in
local/share/gap/modular_resolution and
local/share/singular/modular_resolution
4. Cython/Python code that depends on 1., 2. and 3., and shall either
be OptionalExtension in the Sage library (but people seem to not
like it) or a pip-installable Python package p_group_cohomology,
where 3. should be provided as data files either by 2. or by 4.
I would say: provide it with 2. You could also consider merging 2., 3.
and 4. in one package, since they look closely related (one library +
various interfaces).
Good.
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