Add support for 0.27.0-RC1 and drop pprint for Dotty

[tgodzik]

This PR does the following:

• adds support for 0.27.0-RC1 and switches from 0.26.0-RC1 to 0.26.0
• removes pprint and sourcecode dependency for Dotty
• changes to toString for Dotty evaluation
• uses the default Dotty printer for types, althoguh it need to be copied here, since the reflect printer prints prefixes, which make it unreadable - I plan to add an option in Dotty itself and we will be able to remove that altogether
• switches to local Text macro for both Dotty and Scala 2.

[tgodzik]

The macros are copied from sourcecode.

[kpbochenek]

I cloned your fork, changed branch, then I am opening a VSCode, go to WorksheetSuite, run 'test'. All tests fail with:

error: basic.scala:9 (mdoc generated code) Symbol 'type mdoc.interfaces.RangePosition' is missing from the classpath.
This symbol is required by 'class mdoc.document.RangePosition'.
Make sure that type RangePosition is in your classpath and check for conflicting dependencies with `-Ylog-classpath`.
A full rebuild may help if 'RangePosition.class' was compiled against an incompatible version of mdoc.interfaces.
val x = 1.to(4).toVector; $doc.binder(x, 1, 4, 1, 5)

bloop test worksheets <- same problem

[kpbochenek]

We can't get named params in case classes for dotty? Maybe comment need to change to 'For 2.13 only'

[tgodzik]

From discussions it turns out it causes a bit too verbose output and since we are not using pprint here, but toString named parameters are out. I will change the comment.

[kpbochenek]

Added some minor comments but for a more meaningful review I think you need someone that also looked at adding dotty support because those changes are strongly based on that.

[tgodzik]

I cloned your fork, changed branch, then I am opening a VSCode, go to WorksheetSuite, run 'test'. All tests fail with:

error: basic.scala:9 (mdoc generated code) Symbol 'type mdoc.interfaces.RangePosition' is missing from the classpath.
This symbol is required by 'class mdoc.document.RangePosition'.
Make sure that type RangePosition is in your classpath and check for conflicting dependencies with `-Ylog-classpath`.
A full rebuild may help if 'RangePosition.class' was compiled against an incompatible version of mdoc.interfaces.
val x = 1.to(4).toVector; $doc.binder(x, 1, 4, 1, 5)

bloop test worksheets <- same problem

I can't really reproduce the issue. Best to change the version to a stable one before publishing.

[kpbochenek]

Maybe I am doing something wrong, but what ? ;/

> bloop about
bloop v1.4.3-23-550c6c0a
Using Scala v2.12.8 and Zinc v1.3.0-M4+45-d4354be3
Running on Java JDK v1.8.0_265 (/usr/lib/jvm/java-8-openjdk/jre)

cat project/metals.sbt
// addSbtPlugin("ch.epfl.scala" % "sbt-bloop" % "1.4.3-23-550c6c0a")

> rm -rf .bloop
> sbt bloopInstall
> bloop test worksheets
tests.worksheets.WorksheetSuite:
error: basic.scala:9 (mdoc generated code) Symbol 'type mdoc.interfaces.RangePosition' is missing from the classpath.
This symbol is required by 'class mdoc.document.RangePosition'.
Make sure that type RangePosition is in your classpath and check for conflicting dependencies with `-Ylog-classpath`.
A full rebuild may help if 'RangePosition.class' was compiled against an incompatible version of mdoc.interfaces.
val x = 1.to(4).toVector; $doc.binder(x, 1, 4, 1, 5)
                                     ^

==> X tests.worksheets.WorksheetSuite.basic  2.831s munit.FailException: /home/kpbochenek/vl/github/others/tgodzik-mdoc/tests/worksheets/src/test/scala/tests/worksheets/WorksheetSuite.scala:391 Obtained empty output!

sbt:mdocRoot> worksheets/test
[info] Compiling 1 Scala source to /home/kpbochenek/vl/github/others/tgodzik-mdoc/tests/worksheets/target/scala-2.12/test-classes ...
tests.worksheets.WorksheetSuite:
  + basic 3.12s
  + lazy 0.565s
  + binders 0.644s
...

Works perfectly fine with sbt Oo

[kpbochenek]

I cloned your fork, changed branch, then I am opening a VSCode, go to WorksheetSuite, run 'test'. All tests fail with:

error: basic.scala:9 (mdoc generated code) Symbol 'type mdoc.interfaces.RangePosition' is missing from the classpath.
This symbol is required by 'class mdoc.document.RangePosition'.
Make sure that type RangePosition is in your classpath and check for conflicting dependencies with `-Ylog-classpath`.
A full rebuild may help if 'RangePosition.class' was compiled against an incompatible version of mdoc.interfaces.
val x = 1.to(4).toVector; $doc.binder(x, 1, 4, 1, 5)

bloop test worksheets <- same problem

I can't really reproduce the issue. Best to change the version to a stable one before publishing.

Wait what? version of what? publishing of what? what has unstable version? ❓

[tgodzik]

Wait what? version of what? publishing of what? what has unstable version?

So the problem is that we need to publish for 0.27.0 and 2.12 some of the dependecies. Each time the scala version changes the dyn plugin generates a different version, so I am testing it under version:= 2.2.7-SNAPSHOT etc

[kpbochenek]

ok assuming it was checked in metals that dotty worksheets still work LGTM!

One thing we can improve now or later would be for newcomer wanting to contribute to explain to them what to do when they clone this repo, add test and cannot run it. (I would just update README.md with something like 'if you try to run tests and see this error "Symbol 'type mdoc.interfaces.RangePosition' is missing from the classpath" then execute this and it should work: '?????')

[tgodzik]

I will go ahead with the merge an release. @olafurpg If something at all breaks I will make sure it's fixed as quickly as possible, but hopefully there shouldn't be any problems since the changes to to the Scala 2 functionalities are really small.