Vim exec command in command line, and Vim: Warning: Input is not from a terminal -


vi.sh

vim -c "set ft=unix" -c "x" $1

main.sh

sh vi.sh file1 sh vi.sh file2

if exec sh vi.sh file1 or sh main.sh, there no warning.

but if exec cat main.sh | sh, give:vim: warning: input not terminal.

what difference? how can dismiss warning message when run cat main.sh | sh?

in ~/bin/r

[ $# -eq 0 ] && set -- -; vim -r "$@"

in .vimrc:

au stdinreadpost * set buftype=nofile

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