Re: [newby] Detect if a script was started from the command line
Re: [newby] Detect if a script was started from the command line
- Subject: Re: [newby] Detect if a script was started from the command line
- From: Christopher Nebel <email@hidden>
- Date: Wed, 24 Aug 2005 14:14:25 -0700
On Aug 24, 2005, at 10:01 AM, patrick machielse wrote:
Op 24-aug-2005, om 18:22 heeft applescript-users-
email@hidden het volgende geschreven:
Your way of detecting running via osascript(1) is fairly clever, but
consider:
1. It'll only work in Tiger and later, since before then, osascript
(1) didn't pass arguments to the script.
My script is intended for use with Mail 2, so I know it will be
used on Tiger.
Would the construct
on run arguments
if (class of arguments = list) then
...
cause problems on Panther?
Not problems, precisely, but it won't give you the answer you want,
since in Panther, "arguments" won't be a list. (Weirdly, in
osascript it appears to wind up getting set to the handler itself!)
You could reverse the sense of the test and check for "class ≠
script"...
Also, if I run from the Script Editor I see that the class of
arguments is 'script'. How should I interpret that?
It means that "arguments" is a script object. As it happens, it's
the top-level script object, the same thing as "me" in that context.
2. There are other ways for your script to be run without interaction
allowed; running from osascript is merely the most common one.
I'm interested to know any other scenario's (executing over a
network connection?)
I'll admit that this is more a theoretical case than an actual one.
An application can request to not have any user interaction when
running a script, or it could implicitly be forced to do that because
it's background-only, but almost no one does that -- osascript is one
of the only cases.
In any case, it's good practice to ask the question you really want
the answer to. In your case, that's "can I present UI?", and the
official way to answer that is to use the "(don't) interact" bit.
--Chris Nebel
AppleScript and Automator Engineering
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