How to pass argument to a script in vim system() call?

Question

I would like to pass current filename % as argument of the shell script in system() call :

let rev=system("~/script %")

How can I do that for real ?

Answer 1

Try using exec:

exec 'call system("~/script " . expand("%"))'

Depending on what you want to do you might not need exec at all (like :h system() suggests):

let foo = system("~/script " . expand("%"))

Answer 2

Playing around with expand() (thanks kongo2002) :

let script="~/script " . expand("%")
let rev=system(script)

Works as a charm =)