console output helper in Cakefile for test case selection and parser generation statistics

[cosmicexplorer]

This PR purely modifies the Cakefile in this repo and should not affect any users of the language.

Problem

I was playing around with changes to the parser and language semantics in e.g. #5471 (comment). During the process I found it somewhat difficult to test my changes:

1. It's not possible to select a subset of tests to run with cake test.

• Some of them fail on main for example--I'll fix that in a separate change, but it's why I wanted to select specific tests.

2. It takes a while to build the parser, and it's not easy to distinguish from a hang.
3. There's no mechanism to select what output should be logged when performing a console task with cake.

Solution

• Add -f/--file, -d/--desc flags to select which tests to run.
• Add -l/--level flag to select which console outputs to display.
  • This requires subclassing console.Console, which requires some hijinx.
• Using the new log levels to make it ignorable, add some console output for the parser build process:

# By default, we still print nothing:
> cake build
# With 'debug', we print more, including parser build statistics.
> cake -l debug build
log level = debug
parser created (206 symbols, 107 terminals, 406 productions)
loading grammar: 11127.603219999999 ms
parser generation: 27.266960000000836 ms
full parser build time: 11154.87018 ms
{
  files: [
    'src/browser.coffee',
    'src/cake.coffee',
    'src/coffeescript.coffee',
    'src/command.coffee',
    'src/grammar.coffee',
    'src/helpers.coffee',
    'src/index.coffee',
    'src/lexer.coffee',
    'src/nodes.coffee',
    'src/optparse.coffee',
    'src/register.coffee',
    'src/repl.coffee',
    'src/rewriter.coffee',
    'src/scope.litcoffee',
    'src/sourcemap.litcoffee'
  ]
}

Notes

I have a jison branch which brings the parser build time down to <3 seconds (vs the ~12 seconds it takes now), which I will probably try to merge into upstream jison first if that sounds reasonable. Until then, I should be able to use my local jison along with these changes to more quickly iterate on changes to the language.

[cosmicexplorer]

Proposed a small and focused fix to jison at zaach/jison#408 which improves parser build time by 3x!