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I found the answer to this question while writing it, so I've broadened it a little. I wanted to access the --servername argument, in order to create dynamic settings in my .vimrc file.
Through vim's help, I found the v:servername variable, and my script is working. However, now I'm curious if it's possible to access any arbitrary command-line argument. For example, if I wanted to know if vim was in Lisp mode (-l) or Debugging mode (-D), how would I do it? There seems to be no corresponding v: variable for them.
Here are the variables I found by autocompleting :help v:<Tab>
Is there a general way to access command-line arguments from vimscript?
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To pass command line arguments, we typically define main() with two arguments : first argument is the number of command line arguments and second is list of command-line arguments. The value of argc should be non negative. argv(ARGument Vector) is array of character pointers listing all the arguments.
In your Ruby programs, you can access any command-line arguments passed by the shell with the ARGV special variable. ARGV is an Array variable which holds, as strings, each argument passed by the shell.
Strangely, I think the answer may be "No, there is no direct way to access startup options specified on the command line".
The :args command and argv() can be used to access the filename(s) specified on startup, but that's not what you want.
I see on Vim's forums that someone offered this solution to get the startup command line on Linux:
:exe '!tr "\0" " " </proc/' . getpid() . '/cmdline'
I assume there's analogous command on Windows. . . .
You can look over that forum thread here:
http://groups.google.com/group/vim_use/browse_thread/thread/43773f27cdc10265/ad17ae8180c0fb6e?show_docid=ad17ae8180c0fb6e
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