Re: Scala package

[Julien Lepiller <julien@lepiller.eu>]

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The old scala is written in a superset of java5, that requires PiCo to build, and PiCo was built with JaCo. They were developped at EPFL, and you can find a binary for it, but no source: http://zenger.org/jaco/

Apparently, JaCo was later reimplemented in Keris, whose source code is available. However, KeCo (the Keris compiler) is written in Keris.

It is not even clear that building an old version of scala is going to work, as the language evolved a lot since then.

I think the best way to bootstrap would be to reimplement Scala in another language. I tried that too, but even the parser is crazy.

Le 18 mai 2021 05:44:42 GMT-04:00, Ricardo Wurmus <rekado@elephly.net> a écrit :
>
>Leo Prikler <leo.prikler@student.tugraz.at> writes:
>
>> Hi Julien,
>>
>> Am Dienstag, den 18.05.2021, 01:01 +0200 schrieb Julien 
>> Lepiller:
>>> Hi Guix!
>>> 
>>> I have the attached file that build Scala, although it's not
>>> bootstrapped at all. It contains %binary-scala, a few 
>>> dependencies of
>>> Scala we haven't packaged yet, and the final scala, built from
>>> %binary-scala, without sbt (which requires Scala too).
>>> 
>>> Since I've tried and failed to bootstrap Scala for so long, I 
>>> think
>>> it's time to give up. I can't always create miracles.
>>
>> Some points relevant to bootstrapping:
>> - The last version, that ships "scalai" written in Java seems to 
>> be 
>>   v1.4.0+4.  Perhaps one can use scalai to bootstrap scalac 
>>   within it.
>> - The last version, that does not "require" sbt is 2.11.x,
>>   though with your workaround we can also build later versions.
>
>We tried building a clean bootstrap chain for Scala for years. 
>Back then I went down the rabbit hole and found that early scalac 
>is written in Pizza; but it turned out that Pizza is written in 
>Pizza and is released under the old Artistic License, which is 
>considered non-free.
>
>    https://logs.guix.gnu.org/guix/2018-04-08.log#230002
>    https://logs.guix.gnu.org/guix/2018-04-09.log#073740
>
>I pointed a branch at an old Scala commit that contains the old 
>Socos compiler source, which ostensibly are written in Java, but 
>actually are not:
>
>    https://github.com/rekado/scala-bootstrap/tree/bootstrap
>
>This is at around version 1.4.0.4, as you wrote above.
>
>Since the old days Scala Native has grown considerably, and 
>perhaps we can reuse some of its native libraries.  I’m not too 
>hopeful, because the bulk of it is still written in Scala, 
>obviously, but there are parts that are written in C / C++, which 
>might come in handy.
>
>    https://github.com/scala-native/scala-native
>
>-- 
>Ricardo

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