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myconsole.js
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myconsole.js
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/**
* Module dependencies.
*/
var callsite = require('callsite')
, tty = require('tty')
, util = require('util')
, origin = {}
;
origin.log = console.log
origin.info = console.info
origin.warn = console.warn
origin.error = console.error
origin.dir = console.dir
var styles = {
//styles
'bold' : ['\033[1m', '\033[22m'],
'italic' : ['\033[3m', '\033[23m'],
'underline' : ['\033[4m', '\033[24m'],
'inverse' : ['\033[7m', '\033[27m'],
//grayscale
'white' : ['\033[37m', '\033[39m'],
'grey' : ['\033[90m', '\033[39m'],
'black' : ['\033[30m', '\033[39m'],
//colors
'blue' : ['\033[34m', '\033[39m'],
'cyan' : ['\033[36m', '\033[39m'],
'green' : ['\033[32m', '\033[39m'],
'magenta' : ['\033[35m', '\033[39m'],
'red' : ['\033[31m', '\033[39m'],
'yellow' : ['\033[33m', '\033[39m']
};
exports.useColors = tty.isatty();
exports.log = function() {
var info = traceFormat(__stack[1], styles.grey);
process.stdout.write(info + util.format.apply(this, arguments) + '\n');
}
exports.info = function() {
var info = traceFormat(__stack[1], styles.green);
process.stdout.write(info + util.format.apply(this, arguments) + '\n');
}
exports.warn = function() {
var info = traceFormat(__stack[1], styles.yellow);
process.stderr.write(info + util.format.apply(this, arguments) + '\n');
}
exports.error = function() {
var info = traceFormat(__stack[1], styles.red);
process.stderr.write(info + util.format.apply(this, arguments) + '\n');
}
exports.dir = function(obj, level) {
process.stdout.write(traceFormat(__stack[1], styles.blue) + util.inspect(obj, false, level, exports.useColors) + '\n');
}
exports.traceError = function(obj) {
var info = traceFormat(__stack[1], styles.red);
if(obj instanceof Error) {
process.stderr.write(info + obj.stack + '\n');
} else {
process.stderr.write(info + util.inspect(obj, false, null, exports.useColors) + '\n');
}
}
function ifErrorGetter() {
var call = __stack[1];
return function(err) {
// uncomment to show stack
// process.stdout.write('\n----myconsole-debug--\n')
// process.stdout.write(__stack.map(function(c){return c && (c.getFileName() + ':' + c.getLineNumber()) || '<native>'}).join('\n'))
// process.stdout.write('\n')
if(err) {
if(__stack.length < 2) {
var str = traceFormat(call, styles.red);
} else {
var emitCall = __stack[1].getFileName() == 'events.js' ? __stack[2] : __stack[1];
var str = traceFormat(call, styles.red) + 'at ' + traceFormat(emitCall, styles.yellow);
}
if(err instanceof Error) {
str += err.stack + '\n';
} else {
str += util.inspect(err, false, null, exports.useColors) + '\n';
}
process.stderr.write(str);
}
}
}
exports.__defineGetter__('ifError', ifErrorGetter);
exports.__defineGetter__('logIfError', ifErrorGetter);
/**
* formatting function.
*
* @param {CallSite}
* @param {String} calling method
* @api public
*/
function traceFormat (call, style) {
var basename = call.getFileName().replace(process.cwd() + '/', '')
, date = new Date()
, str = util.format('%d-%d-%d %d:%d:%d [%s:%d]:', date.getUTCFullYear(), date.getMonth(), date.getDate(), date.getHours(), date.getMinutes(), date.getSeconds(), basename, call.getLineNumber())
if (false === exports.traceColors) {
return str;
} else if(exports.traceColors === true || exports.useColors) {
return style[0] + str + style[1];
} else {
return str;
}
}
/**
* Adds trace getter to the `console` object.
*
* @api public
*/
exports.replace = function() {
function replace() {
console.log = exports.log
console.info = exports.info
console.warn = exports.warn
console.error = exports.error
console.dir = exports.dir
console.traceError = exports.traceError
console.__defineGetter__('ifError', ifErrorGetter);
console.__defineGetter__('logIfError', ifErrorGetter);
}
function restore() {
console.log = origin.log
console.error = origin.error
console.warn = origin.warn
console.info = origin.info
console.dir = origin.dir
}
console.replace = exports.replace = replace;
console.restore = exports.restore = restore;
replace();
}