Fix Pulumi/dsh Python mismatch

[jemrobinson]

✅ Checklist

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🚦 Depends on

n/a

⤴️ Summary

Set PULUMI_PYTHON_CMD to use the same Python executable that is being used by dsh.

Thanks for the pointer @craddm !

🌂 Related issues

Closes #2239

🔬 Tests

Tested locally, but we should test on the rc1 branch once this is merged into it

[github-actions]

Coverage report

Click to see where and how coverage changed

File	Statements	Missing	Coverage	Coverage (new stmts)	Lines missing
data_safe_haven/external/interface
pulumi_account.py
Project Total

This report was generated by python-coverage-comment-action

[JimMadge]

I'm not sure this will fix #2239 on its own. I don't think it is just the Python interpreter but also the PYTHONPATH.

[craddm]

Seems to work on my Docker container

[jemrobinson]

Yeah, it also worked for me. I'm not sure why, but I assume it sets the path correctly behind the scenes?

[JimMadge]

Interesting, maybe the interpreter "knows" where it's modules are, or the default path is relative to the executable file or something. If this works on its own though I don't see much benefit in also finding and setting the venv path 👍.

[jemrobinson]

I tried the venv method and couldn't get it to work, so if this fix works for @helendduncan then I'm happy with it :)

[JimMadge]

Seems to work on my Docker container

Reading this a second time, does that mean this works in an environment where it didn't work before (a pipx install), or it still works in your container where it worked previously?

[craddm]

Seems to work on my Docker container

Reading this a second time, does that mean this works in an environment where it didn't work before (a pipx install), or it still works in your container where it worked previously?

pipx didn't work previously - same issue with not finding the modules. Note this is standalone Docker container, not the .devcontainer that I usually use.

[JimMadge]

Great, that sounds like a positive result for this change working then 🎉.

[jemrobinson]

Confirmed working by @helendduncan