Translate rescue node

[st0012]

Motivation

Closes #160

It handles

• Common rescue cases

  begin # or def some_method
    foo
  rescue bar => e
    puts "rescued #{e}"
  end

• Multiple rescues

  begin
    foo
  rescue FooError
  rescue BarError
  end

• Rescue with else

  begin # or def some_method
    foo
  rescue bar => e
    puts "rescued #{e}"
  else
    puts "else"
  end

The first commit adds an empty Gemfile so we can use Ruby LSP in this project for its Show syntax tree command, which is important when translating nodes.

Big shoutout to @amomchilov for pairing with me on this to save me from the compiling error hell 😄

Test plan

See included automated tests.

[amomchilov]

Excellent work, and well tested!

[amomchilov]

Accidental commit?

[st0012]

No it's intentional:

The first commit adds an empty Gemfile so we can use Ruby LSP in this project for its Show syntax tree command, which is important when translating nodes.

[amomchilov]

Hmmmmm... I'm not a fan of this.

Ruby LSP shouldn't require this for a feature that's purely syntactic, and doesn't require any of the indexer information.

I'm OK to commit this for now, but we should remove it before upstreaming into sorbet/sorbet. Perhaps now is a good time to start an issue to track a to-dos like this, that we should do before merging upstream.

[st0012]

Yeah that's the idea: adding it now for our workflow and remove it (along with tasks.json probably) when we upstream.

[st0012]

#279

[egiurleo]

This is awesome. I left some comments about small things, but they're not blockers.

[egiurleo]

Would you mind adding comments to these examples explaining what's different about each of them so this test file is easier to glance through?

[st0012]

Added 👍