Distinguishing CLI from GUI

[Warren Samples]

On Monday, June 13, 2011 07:41:32 AM Richard Gaskin wrote:
> As Todd Geist quoted here earlier, in the Dictionary entry for "$" it says:
> 
>      If you start up the application from the command line (on OS X,
>      Unix or Windows systems), the command name is stored in the
>      global variable $0 and any arguments passed on the command line
>      are stored in numbered variables starting with the $ character.
>      For example, if you start the application by typing the following
>      shell command:
> 
>        myrevapp -h name
> 
>      then the global variable $0 contains "myrevapp" (the name of the
>      application), $1 contains "-h", and $2 contains "name".
> 
> In my tests here, it seems this is only partially correct:  $0 contains
> the app name from the command line ("myrevapp" in their example), but $1
> contains the "name" portion after the "-h" option flag, and the flag
> itself does not appear in any $ variable.
> 
> I have an app in which I'd like to have two different behaviors,
> depending on whether it's being run from the command-line or as a GUI.
> 
> This would be easy if the engine worked as described in the Dictionary
> so I could easily detect if the user launched it with "-ui", but it
> seems the option flags are not being passed to the application, though
> everything that doesn't begin with "-" is.
> 
> So my question is two-fold:
> 
> 1. I've tested this on Windows and Linux and get identical behavior, in
> which the "-" flags aren't present in the "$" vars.  Can anyone here
> confirm this on Linux, Win, or OS X?
> 
> 2. If this is indeed a documentation bug and what I see in my tests is
> what happens for everyone, how can I determine whether the app was
> launched with "-ui" or not?
> 
> --
>   Richard Gaskin
>   Fourth World
>   LiveCode training and consulting: http://www.fourthworld.com
>   Webzine for LiveCode developers: http://www.LiveCodeJournal.com
>   LiveCode Journal blog: http://LiveCodejournal.com/blog.irv
> 


Richard,

It seems to be working here although certain letters seem not to be usable. For example -s does not work. I 
can get an answer dialog to return "-h" when used as a cl flag and the app will do something if there is a 
variable $x which equals -h.

as a silly example, this script does exactly what it looks like it should:

on openstack
    answer $0 && $1 && $2 && $3 && $4 && $5
    if $1 is "-h" then answer "hooboy, it works"
end openstack

using this command: '/myApp -h a-param -o some-param' answers "/myApp -h a-param -o some-param" and then 
answers "hooboy, it works".

openSUSE 11.4 with Bash.

Regards,

Warren