I have a file that works in multiple shells, and is sourced not executed, so I don't want to put a shebang directive in it (also, a "shell" directive would imply it only works on one shell, and I'm not aware of how i can tell shellcheck i want to check multiple shells). I usually lint it on the command line with shellcheck -s sh path/to/file && shellcheck -s dash path/to/file && shellcheck -s bash path/to/file etc.

It would be great if:

1. i could provide a filename in the extension settings, and override the shell (ie, the -s value) for it (Allow to set the shell per-file #214)
2. i could provide multiples and have the extension warn me about the union of all the warnings

Originally posted by @felipecrs in #214 (comment)