Error getting Bloop class path

[bjornregnell]

Version(s)
Scala CLI 1.0.4
Scala 3.3.0
WSL2 with ubuntu 22.04 on a Windows 11 host

Describe the bug
When scala-cli repl . it crashes with

java.lang.Exception: Error getting Bloop class path
  bloop.rifle.BloopRifle$.startServer(BloopRifle.scala:49)
  bloop.rifle.BloopServer$.startBloop$1(BloopServer.scala:79)
  bloop.rifle.BloopServer$.ensureBloopRunning(BloopServer.scala:110)
  bloop.rifle.BloopServer$.bsp(BloopServer.scala:157)
  bloop.rifle.BloopServer$.buildServer(BloopServer.scala:187)
  ...

Attaching the full log.
message.txt

To Reproduce

It was reproducible on the machine of one of my students, until we nuked caches with

rm -rf ~/.ivy2/ ~/.cache/coursier/ ~/.cache/bloop/

Now we can't reproduce it anymore. So the above was a workaround, but we don't know what casued the crash.

Expected behaviour
Even if there are some inconsistencies in caches it should not crash, but try to amend the bloop class path if possible.

[bjornregnell]

perhaps related to oyvindberg/bleep#355

[Gedochao]

not found: /home/yaya123/.ivy2/local/com.googlecode.java-diff-utils/diffutils/1.3.0/ivys/ivy.xml
  checksum format error: /home/yaya123/.cache/coursier/v1/https/repo1.maven.org/maven2/com/googlecode/java-diff-utils/diffutils/1.3.0/.diffutils-1.3.0.pom__sha1

I wonder if we could just catch the coursier error here and suggest the user to clean their coursier cache, as it seems to be causing the checksum errors...

[bjornregnell]

Sounds good to help users to act on this. Perhaps then there should be a scla-cli command that cleans all coursier/bsp/bloop caches? And the error message could then show how to issue this command.