197 lines
4 KiB
JavaScript
197 lines
4 KiB
JavaScript
|
|
/**
|
|
* This is the common logic for both the Node.js and web browser
|
|
* implementations of `debug()`.
|
|
*
|
|
* Expose `debug()` as the module.
|
|
*/
|
|
|
|
exports = module.exports = debug;
|
|
exports.coerce = coerce;
|
|
exports.disable = disable;
|
|
exports.enable = enable;
|
|
exports.enabled = enabled;
|
|
exports.humanize = require('ms');
|
|
|
|
/**
|
|
* The currently active debug mode names, and names to skip.
|
|
*/
|
|
|
|
exports.names = [];
|
|
exports.skips = [];
|
|
|
|
/**
|
|
* Map of special "%n" handling functions, for the debug "format" argument.
|
|
*
|
|
* Valid key names are a single, lowercased letter, i.e. "n".
|
|
*/
|
|
|
|
exports.formatters = {};
|
|
|
|
/**
|
|
* Previously assigned color.
|
|
*/
|
|
|
|
var prevColor = 0;
|
|
|
|
/**
|
|
* Previous log timestamp.
|
|
*/
|
|
|
|
var prevTime;
|
|
|
|
/**
|
|
* Select a color.
|
|
*
|
|
* @return {Number}
|
|
* @api private
|
|
*/
|
|
|
|
function selectColor() {
|
|
return exports.colors[prevColor++ % exports.colors.length];
|
|
}
|
|
|
|
/**
|
|
* Create a debugger with the given `namespace`.
|
|
*
|
|
* @param {String} namespace
|
|
* @return {Function}
|
|
* @api public
|
|
*/
|
|
|
|
function debug(namespace) {
|
|
|
|
// define the `disabled` version
|
|
function disabled() {
|
|
}
|
|
disabled.enabled = false;
|
|
|
|
// define the `enabled` version
|
|
function enabled() {
|
|
|
|
var self = enabled;
|
|
|
|
// set `diff` timestamp
|
|
var curr = +new Date();
|
|
var ms = curr - (prevTime || curr);
|
|
self.diff = ms;
|
|
self.prev = prevTime;
|
|
self.curr = curr;
|
|
prevTime = curr;
|
|
|
|
// add the `color` if not set
|
|
if (null == self.useColors) self.useColors = exports.useColors();
|
|
if (null == self.color && self.useColors) self.color = selectColor();
|
|
|
|
var args = Array.prototype.slice.call(arguments);
|
|
|
|
args[0] = exports.coerce(args[0]);
|
|
|
|
if ('string' !== typeof args[0]) {
|
|
// anything else let's inspect with %o
|
|
args = ['%o'].concat(args);
|
|
}
|
|
|
|
// apply any `formatters` transformations
|
|
var index = 0;
|
|
args[0] = args[0].replace(/%([a-z%])/g, function(match, format) {
|
|
// if we encounter an escaped % then don't increase the array index
|
|
if (match === '%%') return match;
|
|
index++;
|
|
var formatter = exports.formatters[format];
|
|
if ('function' === typeof formatter) {
|
|
var val = args[index];
|
|
match = formatter.call(self, val);
|
|
|
|
// now we need to remove `args[index]` since it's inlined in the `format`
|
|
args.splice(index, 1);
|
|
index--;
|
|
}
|
|
return match;
|
|
});
|
|
|
|
if ('function' === typeof exports.formatArgs) {
|
|
args = exports.formatArgs.apply(self, args);
|
|
}
|
|
var logFn = enabled.log || exports.log || console.log.bind(console);
|
|
logFn.apply(self, args);
|
|
}
|
|
enabled.enabled = true;
|
|
|
|
var fn = exports.enabled(namespace) ? enabled : disabled;
|
|
|
|
fn.namespace = namespace;
|
|
|
|
return fn;
|
|
}
|
|
|
|
/**
|
|
* Enables a debug mode by namespaces. This can include modes
|
|
* separated by a colon and wildcards.
|
|
*
|
|
* @param {String} namespaces
|
|
* @api public
|
|
*/
|
|
|
|
function enable(namespaces) {
|
|
exports.save(namespaces);
|
|
|
|
var split = (namespaces || '').split(/[\s,]+/);
|
|
var len = split.length;
|
|
|
|
for (var i = 0; i < len; i++) {
|
|
if (!split[i]) continue; // ignore empty strings
|
|
namespaces = split[i].replace(/\*/g, '.*?');
|
|
if (namespaces[0] === '-') {
|
|
exports.skips.push(new RegExp('^' + namespaces.substr(1) + '$'));
|
|
} else {
|
|
exports.names.push(new RegExp('^' + namespaces + '$'));
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Disable debug output.
|
|
*
|
|
* @api public
|
|
*/
|
|
|
|
function disable() {
|
|
exports.enable('');
|
|
}
|
|
|
|
/**
|
|
* Returns true if the given mode name is enabled, false otherwise.
|
|
*
|
|
* @param {String} name
|
|
* @return {Boolean}
|
|
* @api public
|
|
*/
|
|
|
|
function enabled(name) {
|
|
var i, len;
|
|
for (i = 0, len = exports.skips.length; i < len; i++) {
|
|
if (exports.skips[i].test(name)) {
|
|
return false;
|
|
}
|
|
}
|
|
for (i = 0, len = exports.names.length; i < len; i++) {
|
|
if (exports.names[i].test(name)) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Coerce `val`.
|
|
*
|
|
* @param {Mixed} val
|
|
* @return {Mixed}
|
|
* @api private
|
|
*/
|
|
|
|
function coerce(val) {
|
|
if (val instanceof Error) return val.stack || val.message;
|
|
return val;
|
|
}
|