typescriptFormatter.js
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/**
* Copyright (c) 2015-present, Facebook, Inc.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
'use strict';
const os = require('os');
const codeFrame = require('@babel/code-frame').codeFrameColumns;
const chalk = require('chalk');
const fs = require('fs');
const issueOrigins = {
typescript: 'TypeScript',
internal: 'fork-ts-checker-webpack-plugin',
};
function formatter(issue) {
const { origin, severity, file, line, message, code, character } = issue;
const colors = new chalk.constructor();
const messageColor = severity === 'warning' ? colors.yellow : colors.red;
const fileAndNumberColor = colors.bold.cyan;
const source = file && fs.existsSync(file) && fs.readFileSync(file, 'utf-8');
const frame = source
? codeFrame(source, { start: { line: line, column: character } })
.split('\n')
.map(str => ' ' + str)
.join(os.EOL)
: '';
return [
messageColor.bold(`${issueOrigins[origin]} ${severity.toLowerCase()} in `) +
fileAndNumberColor(`${file}(${line},${character})`) +
messageColor(':'),
message + ' ' + messageColor.underline(`TS${code}`),
'',
frame,
].join(os.EOL);
}
module.exports = formatter;