igraph: update to 0.10.12.

[tornaria]

Testing the changes

• I tested the changes in this PR: briefly

[szhorvat]

@tornaria Have you considered adding the Python igraph package as well to Void Linux? It is an optional part of SageMath: https://doc.sagemath.org/html/en/reference/spkg/python_igraph.html

[tornaria]

@tornaria Have you considered adding the Python igraph package as well to Void Linux? It is an optional part of SageMath: https://doc.sagemath.org/html/en/reference/spkg/python_igraph.html

I could do it if there is a direct use. Is sagemath (the library / the program) actually using igraph or python-graph?

[szhorvat]

I believe SageMath uses igraph as a dependency of rankwidth.

python-igraph is useful in Sage to gain access to igraph's algorithms, but not required. See https://doc.sagemath.org/html/en/reference/graphs/sage/graphs/generic_graph.html#sage.graphs.generic_graph.GenericGraph.igraph_graph

[tornaria]

I believe SageMath uses igraph as a dependency of rankwidth.

It's a false dependency. Rankwidth uses igraph only for the binary rw. But sagemath only uses the shared library. We don't ship the rw binary on void linux, hence our rankwidth package does not depend on igraph.

python-igraph is useful in Sage to gain access to igraph's algorithms, but not required. See https://doc.sagemath.org/html/en/reference/graphs/sage/graphs/generic_graph.html#sage.graphs.generic_graph.GenericGraph.igraph_graph

I see, so if python-igraph is available, sagemath has a function to convert its own graphs to igraph and use them via python-igraph functions.

I don't do much graph theory myself, but if its useful (together with sage or on on its own), I could try to package it. I'm all in favor of packaging more math software for void linux.

[szhorvat]

It's a false dependency. Rankwidth uses igraph only for the binary rw. But sagemath only uses the shared library. We don't ship the rw binary on void linux, hence our rankwidth package does not depend on igraph.

In that case I actually don't know if there's anything else in SageMath that uses the igraph C library. There might not be.

The usage of igraph in rw is very sloppy and unmaintained (and would need patches for igraph 0.10), so if you can skip building the command line program, do so by all means.

I don't do much graph theory myself, but if its useful (together with sage or on on its own), I could try to package it. I'm all in favor of packaging more math software for void linux.

This would be nice. If you have questions while packaging, feel free to ping me.