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What is GT's philosophy regarding Metacello baselines? Our project, is a collaboration between some people set on working in Squeak and some in Pharo and some in Smalltalk/X and some in Bee, and for a significant stretch of time I have been eyeing GT and now I am in a position where I have a bunch of really nice GT visualizations and I would like to merge those into the main branch of the project. Obviously the visualizations use some GT-specific classes so that code will not compile in a non-GT image. What is the correct way of telling Metacello "this baseline is for GT"? I would be expecting something along the lines of |
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Replies: 2 comments 3 replies
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We are not recommending using groups because they are half baked concepts (you can depend on them, but you cannot manipulate them). Instead, we use exclusively only baselines. So, in your case, I'd have a GT specific baseline that loads your other baseline + the extensions. We typically call these GToolkit4XYZ. For example, take a look here: https://github.com/feenkcom/gt4smacc |
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I see -- gt4smacc is not only in its own GT-specific package, but even in its own repo. I am a bit confused about the general workflow here, because we also use only baselines, not groups. I am trying to think from the perspective of someone who is just venturing into learning-the-VM "our" way and doesn't know that "to load all that Jan&Boris's stuff into the image I need MachineArithmetic then ArchC then PIG2 then blah-blah-blah..." so I want a single "Metacello new ...; load" to deal with all that, but depending on whether I am in GT or not, pull in the GT stuff. Now by looking at gt4smacc, I am starting to understand that this is not your workflow. I am guessing you start from knowing you are in GT, and then "building an image" involves a big spectrum of packages but all of them are "GToolkit4XYZ". Thanks for the answer! |
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Yes, that is our perspective. |
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I think this addresses what you are trying to do: https://github.com/seandenigris/Computer-World/blob/005fd697fc9518d3d2f9d53d67f808d638c5bbb6/repository/BaselineOfComputerWorld/BaselineOfComputerWorld.class.st#L65 It’s from one of many projects that aims to be loadable in either GT or Pharo. It doesn’t use groups |
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Yes, yes! |
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We are not recommending using groups because they are half baked concepts (you can depend on them, but you cannot manipulate them). Instead, we use exclusively only baselines. So, in your case, I'd have a GT specific baseline that loads your other baseline + the extensions. We typically call these GToolkit4XYZ. For example, take a look here: https://github.com/feenkcom/gt4smacc