Determine what type of shell subprocesses are being executed with

[brettcannon]

E.g. is it a login shell, etc. That way we can tell e.g. bash users to make sure they set things as appropriate in their .bash_profile instead of .bashrc (or whatever the appropriate answer is).

We should also see if we can control what kind of shell is used when executing subprocesses and what the performance overhead is in changing it to see if we can simply execute everything in a way that people expect.

[brettcannon]

https://unix.stackexchange.com/questions/38175/difference-between-login-shell-and-non-login-shell

[brettcannon]

microsoft/vscode#57551 (comment) has some details of how to make sure we are calling through the shell in Node (i.e. exec() or spawn() with an option set).

[brettcannon]

We are executing Python with spawn() and I couldn't find any calls where we were using shell: true.

There are some notes in the spawn() docs about potential caveats when executing with the shell.