Better error message when failing to launch Visual Studio Code

[ssanj]

When using launchIDE to launch Visual Studio Code on Macos without either installing it or having it on the path I get the following error:

[error] ({.}/*:runCode) java.io.IOException: Cannot run program "code": error=2, No such file or directory

It might be nice to have a more friendly error message like:

Could not find Visual Studio Code on your system. Please download it and add it to your path (for linux, windows or mac) and then rerun launchIDE.

[smarter]

For anyone wanting to try fixing this, you can do it around here: https://github.com/lampepfl/dotty/blob/34ea263a65dd56db948e94ea19a4ecd9f29e742f/sbt-dotty/src/dotty/tools/sbtplugin/DottyIDEPlugin.scala#L236-L239

[smarter]

The main annoying thing here is that IOException can be thrown in various situations, so you can't just catch IOException and always print this, you would have to check the string IOException#getMessage I guess.

[amanjpro]

I will be willing to work on this, maybe tomorrow I will have time to push something

[amanjpro]

I believe I have fixed this, but not sure how to test it. sbt-dotty/scripted runs a bunch of long tests, is there an easier way to test it?

[amanjpro]

I guess this issue should be closed now, as PR #2841 is now merged

[smarter]

Yes, thanks