Fix non-interactive with param -i in subprocess

[a690700752]

continue #2555 .
When I use the -i parameter to force the launch of the REPL and send code in subprocess (using nvim conjure), it directly enters the repl.runsource block for execution and never enters repl.run(). In this case, the current environment is not the REPL environment, lacking the PS1, PS2 prompts, and some other REPL-specific environment settings, which contradicts the meaning of the -i parameter. On the other hand, other branches execute code first, such as from a file, before entering repl.run().

[Kodiologist]

When making further changes to this PR, please add commits (or force-push) rather than closing it and making a new one.

[Kodiologist]

The test is a bit wonky. Giving the default argument to getattr means that you're accepting either of sys.ps1 or sys.flags.interactive. Shouldn't you be more specific as to which you expect, or simply test for both?

[a690700752]

There just a tests result, below is the result. Maybe we can add comment to that test code.

Environment	IPython	PyCharm Console	Shell (run Python, paste code)	Jupyter Notebook	PyCharm Run	PyCharm Run (Emulate terminal)	Shell (run Python file)
Expected Value	TRUE	TRUE	TRUE	TRUE	FALSE	FALSE	FALSE
hasattr(sys,'ps1')	TRUE	TRUE	TRUE	TRUE	FALSE	FALSE	FALSE
hasattr(sys,'ps2')	TRUE	TRUE	TRUE	TRUE	FALSE	FALSE	FALSE
sys.__stdin__.isatty()	TRUE	FALSE	TRUE	FALSE	FALSE	TRUE	TRUE
sys.__stdout__.isatty()	TRUE	FALSE	TRUE	TRUE	FALSE	TRUE	TRUE
hasattr(__builtins__,'__IPYTHON__')	TRUE	FALSE	FALSE	TRUE	FALSE	FALSE	FALSE
not hasattr(__main**, '__file__')	TRUE	FALSE	TRUE	TRUE	FALSE	FALSE	TRUE
bool(sys.flags.interactive)	FALSE	FALSE	FALSE	FALSE	FALSE	FALSE	FALSE

[Kodiologist]

That's an impressive table you've compiled, but your test only checks hy -i, so that's what the assertion should be written for.

[a690700752]

Ok, I'll continue finish tests.

[Kodiologist]

How's this going?

[Kodiologist]

Superseded by #2587.