I notice in our integration test infra that integration tests aren't hermetic in practice if

use_pantsd=True

, even if

hermetic=True

?

They're running in a sandbox with limited env and explicit input files... So unless they depend on

pants.toml

they should be pretty isolated independent of that flag.

I'm seeing different in practice

when you say “real”, do you mean a copy inside the sandbox?

Presumably copy inside the sandbox, but that is what

hermetic=True

is supposed to finesse, no?

whether or not there is a copy inside the sandbox is controlled by the target definition…

python_integration_tests

transitively includes a lot of stuff: https://github.com/pantsbuild/pants/blob/master/pants-plugins/python_integration_tests_macro.py

I'm fine if there is a copy inside the sandbox,

hermetic=True

is supposed to tell the pants run under test to ignore it