What's the difference between project/build.sbt and project/BuildApp.scala? Can I create any of them interchangeably?
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Jacek Laskowski
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Incerteza
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First, equivalent to project/BuildApp.scala is build.sbt, not project/build.sbt. They are different in what they allow: .scala lets you do things .sbt doesn't, and they can be used together.
Alexey Romanov
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In that case, why to use .sbt at all? – Incerteza Dec 29 '13 at 09:54
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Because it can be simpler than equivalent .scala. – Alexey Romanov Dec 29 '13 at 10:04
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So one can use `project/BuildApp.scala` without using `build.sbt` at all but not vise versa, correct? – Incerteza Dec 29 '13 at 10:08
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No, you can use `build.sbt` by itself. You just won't be able to do some things which aren't needed for simple projects. From the docs: "The recommended approach is to define most configuration in .sbt files, using .scala files for task implementations or to share values, such as keys, across .sbt files." – Alexey Romanov Dec 29 '13 at 10:12
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once again `You just won't be able to do some things which aren't needed for simple projects` - So one can use project/BuildApp.scala without using build.sbt at all but not vise versa, correct? – Incerteza Dec 29 '13 at 10:22
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Once again: you can do vice versa in most cases. – Alexey Romanov Dec 29 '13 at 10:28
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If .scala lets you do things .sbt doesn't, why can't I use .scala always and not use .sbt at all? I don't care about simplicity. – Incerteza Dec 29 '13 at 10:31
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"why can't I use .scala always and not use .sbt at all" You can. – Alexey Romanov Dec 29 '13 at 10:33
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Ok, that was my second comment. – Incerteza Dec 29 '13 at 10:44
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I was responding to "but not vice versa". – Alexey Romanov Dec 29 '13 at 16:23
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You were responding "no". – Incerteza Dec 29 '13 at 18:42
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2Perhaps you should just read the docs: http://www.scala-sbt.org/0.13.1/docs/Getting-Started/Basic-Def.html – James Roper Dec 30 '13 at 12:37