I believe that commits will fail or are disabled ... basically you will be running "normally" in the topaz vm ... so all of the smalltalk functionality will work ... with the restriction that you won't be able to save your work to disk ...Martin/Norm/Dale, Got it. Thanks for your answers. How will work the readonly restriction ?
I think that this is the model ...It will be possible to anything but the commit will fail. Or some feature will be disabled ? I mean if it is possible to execute GS code then is possible to create classes but classes are persistent. So this will be disable or a commit will fail ? If the commit will fail then it will possible to create objects attach them to class vars but no commit available.
What was the main motivation to create a solo Gem ? * To ease the development of Gs_devKit ? * To execute GS code without performance penalties for persistence ? * To use a solo Gem for development ?
I think it was mainly the general case of being able to write
executable smalltalk scripts without *requiring* that a stone be
up and running ... internally we have a number shell scripts and
perl scripts that we use for test drivers and the like and it
would be real nice to be able write and maintain these scripts in
gemstone smalltalk ...
so GsDevKit_home is one of the use cases ... the Pharo3.0 vm that gets built and run in GsDevKit_home is a good example that there are some things that you can't do in bash --- like extract information from .ston files ... with topaz solo, we could distribute and extent file with the GsDevKit_home code preloaded and quite a lot can be done without ever having to have a live stone running ... you do get to the point where it might make sense to use a running stone to store some of the meta data for the system, but with topaz solo, we can run lightweight scripts without requiring a stone to be running ...
In preparation for topaz solo being available, I've started playing around with smalltalk shebang scripts[1] that are based on using a Tonel class file as a script that could be run using topaz solo or a live stone[2]:
#!/usr/bin/smalltalk
"
Example executable script
"
Class {
#name : 'Sample',
#superclass : 'StashScript',
#category : 'Stash-Scripts'
}
{ #category : 'script execution' }
Sample >> scriptOptions [
^ {
#('help' $h #'none').
#('print' $p #'optional').
}
]
{ #category : 'script execution' }
Sample >> executeScript [
opts
at: 'help'
ifAbsent: [
| stream |
stream := WriteStreamPortable on: String new.
args size > 0
ifTrue: [
stream nextPutAll: '|args| '.
args do: [:arg | stream nextPutAll: arg; space ] ]
ifFalse: [ stream nextPutAll: 'no args ' ].
opts at: 'print'
ifPresent: [:optionalArg |
stream nextPutAll: ' |print| ', optionalArg asString ]
ifAbsent: [ stream nextPutAll: ' || no --print ' ].
^ stream contents ]
ifPresent: [ ^ self usage ]
]
{ #category : 'usage' }
Sample >> usage [
| dashes |
dashes := '----------------------------------------------------
'.
^ dashes,
(self manPageClass
fromString:
'NAME
sample - example script
SYNOPSIS
sample [-h|--help] [-p [<arg>] | --print[=<arg>]] [ <positional-args> ]\
[ -- <topaz-specific-options> ]
DESCRIPTION
This example script shows how to define command options and positional arguments.
Use the env var GEMSTONE_SCRIPT_ARGS to define default <stone-name> and other
topaz arguments (<startTopaz-specific-options>) to be used when running scripts.
EXAMPLES
sample.st --help
sample.st -h
sample.st --print=\`hi there\`
sample.st -p \`hi there\` arg1
sample.st --print=hi arg1 arg2
sample.st -p hi
sample.st --print
sample.st -p
sample.st arg1 arg2 arg3
') printString, dashes
]
You might recognize that the above script is similar to what I've been doing for tODE scripts ... this is all fairly experimental at this point ... I'm basically trying to see how far I can go without having to resort to bash:) So far I've been working with a live stone ... when writing some scripts it is very convenient to be able to use a smalltalk development environment (Jadeite and Rowan in my case) to write the scripts, but I anticipate that you should be able to target a smalltalk shebang script at a live stone or topaz solo ...
Dale
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