debug.disable() does not disable?

[swook]

process.env.DEBUG="*";
var debug = require("debug");
var log = debug("app:log");
log("Should show");
debug.disable();
log("Shouldn't show");

The above snippet does not work as expected.

The disable function should remove namespaces instead of trying to enable nothing.
https://github.com/visionmedia/debug/blob/master/debug.js#L159

[TooTallNate]

The disable function should remove namespaces instead of trying to enable nothing

That's not the issue.

The disable()/enable() functions will only work on future created debug instances. This is because the debug code does not maintain a list of debug instances, since it would be a memory leak technically.

I'm considering a few ways to refactor the code to remedy this, but nothing concrete so far.

[swook]

With

var debug = require("debug");

debug.enable("app:*");
var log1 = debug("app:log1");
log1("Should show");

debug.disable();
var log2 = debug("app:log2");
log2("Shouldn't show");

debug.enable("app:*");
var log3 = debug("app:log3");
log1("Should show");
log2("Shouldn't show");
log3("Should show");

One gets

app:log1 Should show +0ms
app:log2 Shouldn't show +2ms
app:log1 Should show +1ms
app:log2 Shouldn't show +0ms
app:log3 Should show +0ms

I understand what you mean by previous debug instances not being kept track of, but the disabling still does not work since enabling "" does not disable existing entries in exports.names.

[TooTallNate]

I see what you mean. Looks like enable() should reset the names and skips
arrays. Patch welcome, otherwise I'll get to it eventually.

On Fri, Oct 24, 2014 at 5:09 PM, Seon-Wook Park [email protected]
wrote:

With

var debug = require("debug");

debug.enable("app:*");
var log1 = debug("app:log1");
log1("Should show");

debug.disable();
var log2 = debug("app:log2");
log2("Shouldn't show");

debug.enable("app:*");
var log3 = debug("app:log3");
log1("Should show");
log2("Shouldn't show");
log3("Should show");

One gets

app:log1 Should show +0ms
app:log2 Shouldn't show +2ms
app:log1 Should show +1ms
app:log2 Shouldn't show +0ms
app:log3 Should show +0ms

I understand what you mean by previous debug instances not being kept
track of, but the disabling still does not work since enabling "" does
not disable existing entries in exports.names.

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#150 (comment).

[ibc]

+1

[CumpsD]

debug.enable(null); does a real disable, removing the localStorage in the browser version, while debug.disable() simply sets it to an empty string.

[ibc]

null == '' returns false, so @CumpsD is right and this is a bug in the code. debug.disable() should call to exports.enable(null) rather than exports.enable('').

Anyhow, calling to exports.enable(null) will just disable the debug for future created debug instances (that is what this issue is about).

[thebigredgeek]

#370 < V3 should solve this