repl: Tab completion issue when useGlobal is set to false

[princejwesley]

Version: v6.1.0 , (master: v7.0.0-pre)
Platform: Darwin Princes-MacBook-Pro.local 15.5.0 Darwin Kernel Version 15.5.0: Tue Apr 19 18:36:36 PDT 2016; root:xnu-3248.50.21~8/RELEASE_X86_64 x86_64
Subsystem: repl

When useGlobal is set to false, Tab complete function returns fewer results.

// With useGlobal: true
Desktop 🙈 ₹ node
> I<<TAB>>
Infinity

Int16Array Int32Array Int8Array Intl

> In

// With useGlobal: false
Desktop 🙈 ₹ cat test.js
const repl = require('repl');
repl.start({useGlobal: false});

Desktop 🙈 ₹ node test.js
> In<<TAB>> // expand to 'Infinity'

[princejwesley]

@addaleax princejwesley@e1884d5 fixes this issue.

[addaleax]

I’m still not sure if that is the right fix, but then again I’m not actually too familiar with how non-useGlobal REPLs are usually used outside of core.

My first intuition would have been that implementing .scope by default could solve this (apparently that’s what the debugger REPL does?), but ultimately I can’t speak up for which approach would be the best one.

[addaleax]

I’d still think that side effects of tab completion should be avoided as far as possible.

[lance]

@princejwesley hope I'm not stepping on your toes here, but I think this is the better way to accomplish what you are trying to do. /cc @addaleax

[princejwesley]

@lance Please find my comments