diff options
Diffstat (limited to 'node_modules/error-ex/index.js')
-rw-r--r-- | node_modules/error-ex/index.js | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/node_modules/error-ex/index.js b/node_modules/error-ex/index.js new file mode 100644 index 000000000..4fb20b487 --- /dev/null +++ b/node_modules/error-ex/index.js @@ -0,0 +1,141 @@ +'use strict'; + +var util = require('util'); +var isArrayish = require('is-arrayish'); + +var errorEx = function errorEx(name, properties) { + if (!name || name.constructor !== String) { + properties = name || {}; + name = Error.name; + } + + var errorExError = function ErrorEXError(message) { + if (!this) { + return new ErrorEXError(message); + } + + message = message instanceof Error + ? message.message + : (message || this.message); + + Error.call(this, message); + Error.captureStackTrace(this, errorExError); + + this.name = name; + + Object.defineProperty(this, 'message', { + configurable: true, + enumerable: false, + get: function () { + var newMessage = message.split(/\r?\n/g); + + for (var key in properties) { + if (!properties.hasOwnProperty(key)) { + continue; + } + + var modifier = properties[key]; + + if ('message' in modifier) { + newMessage = modifier.message(this[key], newMessage) || newMessage; + if (!isArrayish(newMessage)) { + newMessage = [newMessage]; + } + } + } + + return newMessage.join('\n'); + }, + set: function (v) { + message = v; + } + }); + + var overwrittenStack = null; + + var stackDescriptor = Object.getOwnPropertyDescriptor(this, 'stack'); + var stackGetter = stackDescriptor.get; + var stackValue = stackDescriptor.value; + delete stackDescriptor.value; + delete stackDescriptor.writable; + + stackDescriptor.set = function (newstack) { + overwrittenStack = newstack; + }; + + stackDescriptor.get = function () { + var stack = (overwrittenStack || ((stackGetter) + ? stackGetter.call(this) + : stackValue)).split(/\r?\n+/g); + + // starting in Node 7, the stack builder caches the message. + // just replace it. + if (!overwrittenStack) { + stack[0] = this.name + ': ' + this.message; + } + + var lineCount = 1; + for (var key in properties) { + if (!properties.hasOwnProperty(key)) { + continue; + } + + var modifier = properties[key]; + + if ('line' in modifier) { + var line = modifier.line(this[key]); + if (line) { + stack.splice(lineCount++, 0, ' ' + line); + } + } + + if ('stack' in modifier) { + modifier.stack(this[key], stack); + } + } + + return stack.join('\n'); + }; + + Object.defineProperty(this, 'stack', stackDescriptor); + }; + + if (Object.setPrototypeOf) { + Object.setPrototypeOf(errorExError.prototype, Error.prototype); + Object.setPrototypeOf(errorExError, Error); + } else { + util.inherits(errorExError, Error); + } + + return errorExError; +}; + +errorEx.append = function (str, def) { + return { + message: function (v, message) { + v = v || def; + + if (v) { + message[0] += ' ' + str.replace('%s', v.toString()); + } + + return message; + } + }; +}; + +errorEx.line = function (str, def) { + return { + line: function (v) { + v = v || def; + + if (v) { + return str.replace('%s', v.toString()); + } + + return null; + } + }; +}; + +module.exports = errorEx; |