Set environment variable when running commands

[ktbarrett]

How would this feature be useful?

Setting an environment variable in the environment of session.run'd commands would allow the child process to know it is being executed by nox and perhaps even what session of nox is being. Personally, I would find this useful when session.runing bash or code (using nox as a development environment manager) so that I can adjust my PS1 with the name of the session I'm in.

Describe the solution you'd like

When running any command with session.run, the command environment is adjusted to set the NOX_CURRENT_SESSION variable with the name of the current session.

Describe alternatives you've considered

It's entirely possible to do this myself using env argument to session.run. However it is something innocuous that takes the burden off the user without considerable maintenance effort.

Anything else?

No response

[crwilcox]

This seems like a nice enhancement and shouldn't be disruptive to folks. I'd be for this.