Remove println in sbt-plugin

[lolgab]

I'm seeing a lot of spammy printlns in 1.1.0-RC1 like:

ScopedKey(Scope(Select(ProjectRef(file:/Users/lorenzo/codacy/github/codacy-website/,legacy-api)), Select(ConfigKey(compile)), Zero, Zero),exportedProducts)
ScopedKey(Scope(Select(ProjectRef(file:/Users/lorenzo/codacy/github/codacy-website/,app)), Select(ConfigKey(compile)), Zero, Zero),internalDependencyClasspath)
ScopedKey(Scope(Select(ProjectRef(file:/Users/lorenzo/codacy/github/codacy-website/,app)), Select(ConfigKey(compile)), Zero, Zero),dependencyClasspath)
ScopedKey(Scope(Select(ProjectRef(file:/Users/lorenzo/codacy/github/codacy-website/,app)), Select(ConfigKey(compile)), Zero, Zero),dependencyVirtualClasspath)
ScopedKey(Scope(Select(ProjectRef(file:/Users/lorenzo/codacy/github/codacy-website/,app)), Select(ConfigKey(compile)), Zero, Zero),dependencyPicklePath)
ScopedKey(Scope(Select(ProjectRef(file:/Users/lorenzo/codacy/github/codacy-website/,app)), Select(ConfigKey(compile)), Zero, Zero),compileIncSetup)
ScopedKey(Scope(Select(ProjectRef(file:/Users/lorenzo/codacy/github/codacy-website/,app)), Select(ConfigKey(compile)), Select(compile), Zero),compileOptions)
ScopedKey(Scope(Select(ProjectRef(file:/Users/lorenzo/codacy/github/codacy-website/,app)), Select(ConfigKey(compile)), Zero, Zero),previousCompile)
ScopedKey(Scope(Select(ProjectRef(file:/Users/lorenzo/codacy/github/codacy-website/,app)), Select(ConfigKey(compile)), Select(compile), Zero),compileInputs)
[info] compiling 349 Scala sources and 16 Java sources to /Users/lorenzo/codacy/github/codacy-website/app/target/scala-2.13/classes ...
[info] Writing graph to /Users/lorenzo/codacy/github/codacy-website/app/target/scala-2.13/classes/META-INF/profiledb/graphs/implicit-searches-1698594885712.flamegraph
[info] Creating global statistics information at /Users/lorenzo/codacy/github/codacy-website/app/target/scala-2.13/classes/META-INF/profiledb/global.profiledb.
ScopedKey(Scope(Select(ProjectRef(file:/Users/lorenzo/codacy/github/codacy-website/,app)), Select(ConfigKey(compile)), Zero, Zero),compileIncremental)
ScopedKey(Scope(Select(ProjectRef(file:/Users/lorenzo/codacy/github/codacy-website/,app)), Select(ConfigKey(compile)), Zero, Zero),compileScalaBackend)
ScopedKey(Scope(Select(ProjectRef(file:/Users/lorenzo/codacy/github/codacy-website/,app)), Select(ConfigKey(compile)), Zero, Zero),compileSplit)
ScopedKey(Scope(Select(ProjectRef(file:/Users/lorenzo/codacy/github/codacy-website/,app)), Select(ConfigKey(compile)), Zero, Zero),manipulateBytecode)
ScopedKey(Scope(Select(ProjectRef(file:/Users/lorenzo/codacy/github/codacy-website/,app)), Select(ConfigKey(compile)), Zero, Zero),manipulateBytecode)
ScopedKey(Scope(Select(ProjectRef(file:/Users/lorenzo/codacy/github/codacy-website/,app)), Select(ConfigKey(compile)), Zero, Zero),compile)
ScopedKey(Scope(Select(ProjectRef(file:/Users/lorenzo/codacy/github/codacy-website/,app)), Select(ConfigKey(compile)), Zero, Zero),compile)
ScopedKey(Scope(Select(ProjectRef(file:/Users/lorenzo/codacy/github/codacy-website/,app)), Zero, Zero, Zero),compile)
ScopedKey(Scope(Select(ProjectRef(file:/Users/lorenzo/codacy/github/codacy-website/,app)), Select(ConfigKey(compile)), Zero, Zero),discoveredMainClasses)
ScopedKey(Scope(Select(ProjectRef(file:/Users/lorenzo/codacy/github/codacy-website/,app)), Select(ConfigKey(compile)), Zero, Zero),compileOutputs)
ScopedKey(Scope(Select(ProjectRef(file:/Users/lorenzo/codacy/github/codacy-website/,app)), Select(ConfigKey(compile)), Zero, Zero),compileOutputs)
ScopedKey(Scope(Select(ProjectRef(file:/Users/lorenzo/codacy/github/codacy-website/,app)), Select(ConfigKey(compile)), Select(compileOutputs), Zero),dynamicFileOutputs)

This PR removes them.

[danicheg]

@lolgab any interesting observations/results?

[lolgab]

@danicheg Can you elaborate? I didn't understand about what results you are talking about.

[danicheg]

@lolgab It seems to me like you've tried out the scalac-profiling in the wild. So I'm asking you about some notable results of the investigation if you can share them.

[lolgab]

@danicheg I gave a very quick try. I tried to generate a flamegraph but without success so far.
I will try again today :)
I think that the documentation needs some love. I have some experience with Scala and its tooling, but it was not easy to get started with async-profiler.
I think the best tool I used so far in this space is async-profiling. You run it, it runs for some time and generates directly an html file with your flamegraph, ready to be opened with a web browser. You can take some inspiration from it.

[danicheg]

I think that the documentation needs some love.

Yeah, agree.

I tried to generate a flamegraph but without success so far.

Don't know about the particular struggles you faced, but I recently wrote a short how-to for quick setup (it's not an ad).

I think the best tool I used so far in this space is async-profiling. You run it, it runs for some time and generates directly an html file with your flamegraph, ready to be opened with a web browser. You can take some inspiration from it.

Actually, I had ideas about wrapping needed stuff into the single command for scala-cli. Maybe will return to it sometime.

[lolgab]

Thank you for the how-to! I'm going to follow it and let's see if I can make it work :)

[danicheg]

@lolgab have you tried building the scalac-profiling locally and using it? I just did it and got these errors in my sandbox project:

[error] bad option: -P:scalac-profiling:no-profiledb
[error] bad option: -P:scalac-profiling:show-profiles

If I use the 1.1.0-RC1 version with the same settings, it works well.
cc @sjrd

Sorry for bugging you, this was me 🤦🏻 We have to add some CONTRIBUTING.md guide too 😄