130 lines
2.4 KiB
JavaScript
130 lines
2.4 KiB
JavaScript
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/**
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* Module dependencies.
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*/
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var tty = require('tty');
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var util = require('util');
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/**
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* This is the Node.js implementation of `debug()`.
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*
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* Expose `debug()` as the module.
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*/
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exports = module.exports = require('./debug');
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exports.log = log;
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exports.formatArgs = formatArgs;
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exports.save = save;
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exports.load = load;
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exports.useColors = useColors;
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/**
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* Colors.
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*/
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exports.colors = [6, 2, 3, 4, 5, 1];
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/**
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* Is stdout a TTY? Colored output is enabled when `true`.
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*/
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function useColors() {
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var debugColors = (process.env.DEBUG_COLORS || '').trim().toLowerCase();
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if (0 === debugColors.length) {
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return tty.isatty(1);
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} else {
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return '0' !== debugColors
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&& 'no' !== debugColors
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&& 'false' !== debugColors
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&& 'disabled' !== debugColors;
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}
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}
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/**
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* Map %o to `util.inspect()`, since Node doesn't do that out of the box.
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*/
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var inspect = (4 === util.inspect.length ?
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// node <= 0.8.x
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function (v, colors) {
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return util.inspect(v, void 0, void 0, colors);
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} :
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// node > 0.8.x
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function (v, colors) {
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return util.inspect(v, { colors: colors });
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}
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);
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exports.formatters.o = function(v) {
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return inspect(v, this.useColors)
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.replace(/\s*\n\s*/g, ' ');
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};
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/**
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* Adds ANSI color escape codes if enabled.
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*
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* @api public
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*/
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function formatArgs() {
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var args = arguments;
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var useColors = this.useColors;
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var name = this.namespace;
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if (useColors) {
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var c = this.color;
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args[0] = ' \u001b[9' + c + 'm' + name + ' '
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+ '\u001b[0m'
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+ args[0] + '\u001b[3' + c + 'm'
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+ ' +' + exports.humanize(this.diff) + '\u001b[0m';
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} else {
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args[0] = new Date().toUTCString()
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+ ' ' + name + ' ' + args[0];
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}
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return args;
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}
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/**
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* Invokes `console.error()` with the specified arguments.
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*/
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function log() {
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return console.error.apply(console, arguments);
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}
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/**
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* Save `namespaces`.
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*
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* @param {String} namespaces
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* @api private
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*/
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function save(namespaces) {
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if (null == namespaces) {
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// If you set a process.env field to null or undefined, it gets cast to the
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// string 'null' or 'undefined'. Just delete instead.
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delete process.env.DEBUG;
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} else {
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process.env.DEBUG = namespaces;
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}
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}
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/**
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* Load `namespaces`.
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*
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* @return {String} returns the previously persisted debug modes
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* @api private
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*/
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function load() {
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return process.env.DEBUG;
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}
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/**
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* Enable namespaces listed in `process.env.DEBUG` initially.
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*/
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exports.enable(load());
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