Distinguish between being run in a terminal vs run inside another script about nodebuilder HOT 4 CLOSED

So, if the state of $PPID contains an s, the script is being run directly.
If the state of $PPID doesn't contain an s, the script is being run by another script.

from nodebuilder.

Not sure if it's value-added for nodebuilder to identitfy when the script is run asynchronously (with the & at the end). But if it were, checking the state of $$ for a + would work.

Probably just looking for the s in $PPID to determine if the script was run from another script (whether synchronously or asynchronously) is sufficient.

from nodebuilder.

Not convinced that this is worth implementing. What UX would it improve?

from nodebuilder.

Closing until I have a concrete use case.

from nodebuilder.