[Opensim-users] Script Engine Messages

[James Stallings II]

Personally, I'm all for unix style bang notation/magic numbers. They start
with a comment character so are ignored anywhere they aren't meaningful,
and leave the door open to unanticpated future script engine shenanigans :)

Just my 0.02$O

Cheers
James


On Thu, Jun 28, 2012 at 4:42 PM, Justin Clark-Casey <
jjustincc at googlemail.com> wrote:

> I have made a refinement in commit 972b0b5 to still warn if no explicit
> language was set.  I believe the false positives will be lower here, since
> lines are less likely to end with colons for completely separate reasons.
>
> This is about balancing the known false positives against any use of this
> alternative engine specification facility. This problem (false positives
> because of : in the first line) has come up a lot in the past as well as
> now.  On the other hand. are you (or anybody else on this list) aware of
> any current cases of people using this ability to specify a different
> script engine?  I'm not currently aware of any.
>
> The only other current script engine implementations I'm aware of are
> apart from XEngine are DNE (long discarded from core), ForthMinus
> (abandoned by Alondira over 4 years ago), some other DNE derived engine
> that was long abandoned and your own proprietary engine.  I don't count
> engines running on forked codebases since they have moved away from
> OpenSimulator compatibility.
>
> To be honest, I think this is an over-specified feature that was only
> brought in originally to avoid making a decision about OpenSimulator's
> script engine.  I find it hard to believe that anyone would want to deal
> with the complexity of running some scripts in one engine and other scripts
> in another in the same simulator, just for some theoretical performance
> advantage.  I rather doubt you're running 2 engines for the same language
> since that would be a nightmare to explain to users (happy to be corrected
> on this point).
>
> Really, I think we should adopt a better way of specifying the script
> language/engine than looking for a : than be stuck with this issue forever.
>
>
> On 28/06/12 02:50, Melanie wrote:
>
>> I'm afraid that can't be done this way. Selecting an engine without
>> giving it an explicit language, e.g. // SCEngine: is legal.
>> Therefore, with this patch, the defaulting to XEngine is no longer
>> reported int these cases. Since the reporting was introduced to
>> ensure that scripts are not run on engines with lesser
>> functionality, the entire purpose of the message is completely
>> defeated by this. With this patch, we might as well not notify users
>> at all and just let them crash and burn.
>>
>> Melanie
>>
>> On 28/06/2012 02:49, Justin Clark-Casey wrote:
>>
>>> Okay Edmund, commit 25baa2d contains a change which should eliminate
>>> reporting of these false positives.  Please give it
>>> a whirl.
>>>
>>> On 26/06/12 01:38, Edmund Edgar wrote:
>>>
>>>> On 26 June 2012 08:58, Justin Clark-Casey <jjustincc at googlemail.com>
>>>> wrote:
>>>>
>>>>> I don't like the way script language/desired engine detection was done
>>>>> - a
>>>>> clash with existing scripts could have been avoided by requiring some
>>>>> special preceeding chracters rather than simple c#, lsl:DotNetEngine,
>>>>> etc
>>>>> (like #! in shell scripts, for instance).
>>>>>
>>>>
>>>> Agreed, but on the assumption that we're stuck with this convention
>>>> now, would it be possible to tighten up the pattern matching a bit? It
>>>> feels like the system should be able to tell the difference between
>>>> //c#
>>>> ...and
>>>> // This is a comment consisting of multiple words. What it has to do
>>>> with script engines: Nothing.
>>>>
>>>> Just checking for a colon seems a bit broad. One of the mind-numbing
>>>> busywork tasks on my TODO list this morning is cleaning up some
>>>> scripts somebody checked in since I last fixed our iar. Their editor -
>>>> I think it's the Eclipse plugin - has helpfully added:
>>>> // LSL script generated:
>>>> furniture-1.0.object_**definitions.presentation_**seating.lslp Sat Nov
>>>> 19
>>>> 14:36:29 Tokyo Standard Time 2011
>>>>
>>>>
>>>
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>>
>
> --
> Justin Clark-Casey (justincc)
> http://justincc.org/blog
> http://twitter.com/justincc
>
>
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