How to use variable when setting makeprg in vim?

Question

I am creating a method called SetLaunchingComponent which is used to set the makeprg with the variable passed in.This is how the script look like now.

function! SetLaunchingComponent(path) 
    set makeprg=$path
endfunction

Obviously the function isn't working as i wished. As vim resolve the path environment as the system variable but not a:path. So what should i do?

Answer 1

要设置一个选项，您应该使用以下语法：

let &makeprg=a:path

Answer 2

command! -n=1 SL call SetLanuchingComponent(<arg>)

这将使您易于使用该功能。