How to disable vim source .cshrc when running external command?

Question

I'm running external command inside vim by :!command.
Noticed vim will source .cshrc before run the command, because I've added some echo in the .cshrc.
Is there a way to force vim don't source the .cshrc?

Answer 1

-f tells csh not to source its startup scripts, so you need to tell Vim to give that flag to the shell.

:! and ! use the shell specified in the shell option, with flag(s) from the shellcmdflag option. By default, that is -c, which has to come immediately before the command to run. If you want additional options, you'll need to insert them before that:

set shellcmdflag=-f\ -c