allow slim to be built from source

[petrelharp]

For instance, I'm currently working on pyslim, which needs to use the current in-development multitrait branch of SLiM.

[petrelharp]

Fuck it, we'll just not build docs with development SLiM and check docs locally.

[jeromekelleher]

Just FYI, to fix this issue with zizmor you put the inputs into a local environment variable like this:

.github/.github/workflows/c-tests.yml

Line 44 in da9daf9

env:

The reason for this (a good one) is that it's stops arbitrary shell interpolation within your inputs (so letting an attacker run abitrary shell commands in your session).

[petrelharp]

okay maybe I do need this...

[petrelharp]

Testing this out (I think) over at tskit-dev/pyslim#431

[petrelharp]

Hey! It works! To test it I had to switch the action link to this branch; I'll switch it back now. So I think we can merge this, and I can test it again with @main.

[petrelharp]

Wait I spoke too soon...

[petrelharp]

NOW it works (with some later, expected, errors because I deleted most of the docs files in that test branch).

[petrelharp]

Well, zizmor initially complained about the fix for #53, but updating zizmor fixed that problem.

[petrelharp]

Okay, I think this can be merged.

[petrelharp]

and OKAY I got a successful build over at https://github.com/tskit-dev/pyslim/actions/runs/31771028178/job/94676838469?pr=431 with this