gvim自定义命令参数

Question

I'm trying to create a custom command to use vimgrep to search a pattern in a given file pattern like

:command -nargs=* Find :tabnew <bar> vimgrep /<arg1>/gj <arg2> <bar> cw <cr>

How do I access the arguments arg1 and arg2?

Edit 1 : I came up with the following solution

command! -nargs=* Find call VimFind(<f-args>)
function! VimFind(searchPattern,filePattern,...)
  let searchCommand = 'vimgrep /'.a:searchPattern.'/gj '.a:filePattern.'|cw'
  if a:0 > 0 && a:1 == 'n'
    let searchCommand = 'tabnew|'.l:searchCommand
  endif
  execute l:searchCommand
endfunction

Is there a cleaner way to do this?

Edit 2 : Ah well, the above function errors out and then opens a new tab when nothing is found

Answer 1

By using <f-args> and a function, Vim parses the individual command arguments for you; that's a correct way to do this.

To deal with errors from :vimgrep , you have to enclose the execute l:searchCommand with try...catch , eg:

try
    execute l:searchCommand
catch /^Vim\%((\a\+)\)\=:E/
    tabclose

    echohl ErrorMsg
    echomsg 'Search failed'
    echohl None
endtry

I don't see why you need to :tabnew before the search; if you do this afterwards (but before the :cw ), you don't have to clean up in case of failed searches.