Make it work like the real thing

[jkrems]

As per the official docs:

• node debug <script> starts the script and attaches a debugger
• node debug <host>:<port> attaches to a running debugger remotely
• help shows available commands
• Enter repeats the last command

Stepping

• cont, c: Resumes execution
• next, n: Step over current line
• step, s: Step into current line, potentially entering the function being called
• out, o: Drop out of current function
• pause: Pause execution

Breakpoints

• setBreakpoint(), sb(): Set breakpoint on current line
• setBreakpoint(line), sb(line): Set breakpoint on specific line
• setBreakpoint('fn()'), sb(...): Set breakpoint on a first statement in functions body
• setBreakpoint('script.js', 1), sb(...): Set breakpoint on first line of script.js
• breakpoints: List all breakpoints
• clearBreakpoint('script.js', 1), cb(...): Clear breakpoint in script.js on line 1
• It is also possible to set a breakpoint in a file (module) that isn't loaded yet

Information

• backtrace, bt: Print backtrace of current execution frame
• list(n): List scripts source code with n line context (n lines before and after)
• watch(expr): Add expression to watch list
• unwatch(expr): Remove expression from watch list
• watchers: List all watchers and their values (automatically listed on each breakpoint)
• repl: Open debugger's repl for evaluation in debugging script's context
• exec expr/exec('expr'): Execute an expression in debugging script's context

Execution control

• run: Run script (automatically runs on debugger's start)
• restart: Restart script
• kill: Kill script

Various

• scripts: List all loaded scripts
• version: Display V8's version