Improve rendering of Error objects

master
Sven Slootweg 8 years ago
parent 740e43db63
commit 10a2874212

@ -1,9 +1,11 @@
'use strict';
var util = require("util");
var path = require("path");
var chalk = require("chalk");
var spy = require("through2-spy");
var fancyLog = require("fancy-log");
var repeatString = require("repeat-string");
var padWidth = 5;
@ -24,6 +26,60 @@ function hexify(buff) {
return bytes;
}
function renderError(err) {
var message = void 0,
stack = void 0;
if (err.stack != null) {
var stackLines = err.stack.split("\n");
message = stackLines[0];
stack = stackLines.slice(1);
} else {
message = err.message;
}
var properties = Object.keys(err).map(function (key) {
return {
key: key,
value: err[key]
};
});
if (stack != null) {
properties.push({
key: "stacktrace",
literal: stack.map(function (line) {
return line.trim();
}).join("\n")
});
}
var renderedProperties = properties.map(function (property) {
var renderedValue = void 0;
if (property.literal != null) {
renderedValue = property.literal;
} else {
renderedValue = util.inspect(property.value, { colors: true });
}
return chalk.bold.blue(property.key) + ":\n" + indentMultiline(renderedValue);
}).join("\n");
var details = indentMultiline("" + renderedProperties);
return chalk.bold.red(message) + "\n" + details;
}
function indentMultiline(text) {
var spaces = arguments.length <= 1 || arguments[1] === undefined ? 4 : arguments[1];
var indent = repeatString(" ", spaces);
return text.split("\n").map(function (line) {
return indent + line;
}).join("\n");
}
module.exports = function namedLog(name) {
var options = arguments.length <= 1 || arguments[1] === undefined ? {} : arguments[1];
@ -44,7 +100,12 @@ module.exports = function namedLog(name) {
args[_key] = arguments[_key];
}
fancyLog.apply(null, prefixes.concat(args));
if (args[0] instanceof Error) {
var renderedError = renderError(args[0]);
fancyLog.apply(null, prefixes.concat([renderedError]));
} else {
fancyLog.apply(null, prefixes.concat(args));
}
};
}

@ -19,6 +19,7 @@
"dependencies": {
"chalk": "^1.1.1",
"fancy-log": "^1.2.0",
"repeat-string": "^1.5.4",
"through2-spy": "^2.0.0"
},
"devDependencies": {

@ -1,9 +1,11 @@
'use strict';
const util = require("util");
const path = require("path");
const chalk = require("chalk");
const spy = require("through2-spy");
const fancyLog = require("fancy-log");
const repeatString = require("repeat-string");
const padWidth = 5;
@ -24,6 +26,53 @@ function hexify(buff) {
return bytes;
}
function renderError(err) {
let message, stack;
if (err.stack != null) {
let stackLines = err.stack.split("\n");
message = stackLines[0];
stack = stackLines.slice(1);
} else {
message = err.message;
}
let properties = Object.keys(err).map((key) => {
return {
key: key,
value: err[key]
};
});
if (stack != null) {
properties.push({
key: "stacktrace",
literal: stack.map((line) => line.trim()).join("\n")
})
}
let renderedProperties = properties.map((property) => {
let renderedValue;
if (property.literal != null) {
renderedValue = property.literal;
} else {
renderedValue = util.inspect(property.value, {colors: true});
}
return `${chalk.bold.blue(property.key)}:\n${indentMultiline(renderedValue)}`;
}).join("\n");
let details = indentMultiline(`${renderedProperties}`);
return `${chalk.bold.red(message)}\n${details}`
}
function indentMultiline(text, spaces = 4) {
let indent = repeatString(" ", spaces);
return text.split("\n").map((line) => indent + line).join("\n");
}
module.exports = function namedLog(name, options = {}) {
let prefix = `[${chalk.green(name)}]`;
@ -38,7 +87,12 @@ module.exports = function namedLog(name, options = {}) {
}
return function log(...args) {
fancyLog.apply(null, prefixes.concat(args));
if (args[0] instanceof Error) {
let renderedError = renderError(args[0]);
fancyLog.apply(null, prefixes.concat([renderedError]));
} else {
fancyLog.apply(null, prefixes.concat(args));
}
}
}
@ -72,4 +126,4 @@ module.exports = function namedLog(name, options = {}) {
});
}
}
}
}

@ -0,0 +1,21 @@
'use strict';
const namedLog = require("./");
let logger = namedLog("test");
let err = new Error("Foo bar!");
err.location = {
start: {
offset: 339,
line: 36,
column: 8
},
end: {
offset: 362,
line: 36,
column: 31
}
}
logger.error(err);
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