My personal library of SageMath code

If you symlink it to ~/.sage/init.sage, the sample init.sage file will
load this stuff into your session when Sage starts. It assumes that
this repository lives at either ~/src/sage.d or ~/src/sage.d.git, but
that's easy to change. More likely though you will want to copy/paste
the relevant parts into your own personal (preexisting) init.sage.

Newer versions of Sage don't load ~/.sage/init.sage during test mode,
and all modules need to be imported explicitly. The test suite is
therefore a little tricky to run; but "make check" should work.