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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,128 @@ | ||
| /** | ||
| * 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. | ||
| */ | ||
| /* eslint-disable */ | ||
| 'use strict' | ||
|
|
||
| const friendlySyntaxErrorLabel = 'Syntax error:' | ||
|
|
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| function isLikelyASyntaxError(message) { | ||
| return message.indexOf(friendlySyntaxErrorLabel) !== -1 | ||
| } | ||
|
|
||
| // Cleans up webpack error messages. | ||
| function formatMessage(message) { | ||
| let lines = [] | ||
|
|
||
| if (typeof message === 'string') { | ||
| lines = message.split('\n') | ||
| } else if ('message' in message) { | ||
| lines = message['message'].split('\n') | ||
| } else if (Array.isArray(message)) { | ||
| message.forEach((message) => { | ||
| if ('message' in message) { | ||
| lines = message['message'].split('\n') | ||
| } | ||
| }) | ||
| } | ||
|
|
||
| // Strip webpack-added headers off errors/warnings | ||
| // https://github.com/webpack/webpack/blob/master/lib/ModuleError.js | ||
| lines = lines.filter((line) => !/Module [A-z ]+\(from/.test(line)) | ||
|
|
||
| // Transform parsing error into syntax error | ||
| // TODO: move this to our ESLint formatter? | ||
| lines = lines.map((line) => { | ||
| const parsingError = /Line (\d+):(?:(\d+):)?\s*Parsing error: (.+)$/.exec( | ||
| line | ||
| ) | ||
| if (!parsingError) { | ||
| return line | ||
| } | ||
| const [, errorLine, errorColumn, errorMessage] = parsingError | ||
| return `${friendlySyntaxErrorLabel} ${errorMessage} (${errorLine}:${errorColumn})` | ||
| }) | ||
|
|
||
| message = lines.join('\n') | ||
| // Smoosh syntax errors (commonly found in CSS) | ||
| message = message.replace( | ||
| /SyntaxError\s+\((\d+):(\d+)\)\s*(.+?)\n/g, | ||
| `${friendlySyntaxErrorLabel} $3 ($1:$2)\n` | ||
| ) | ||
| // Clean up export errors | ||
| message = message.replace( | ||
| /^.*export '(.+?)' was not found in '(.+?)'.*$/gm, | ||
| `Attempted import error: '$1' is not exported from '$2'.` | ||
| ) | ||
| message = message.replace( | ||
| /^.*export 'default' \(imported as '(.+?)'\) was not found in '(.+?)'.*$/gm, | ||
| `Attempted import error: '$2' does not contain a default export (imported as '$1').` | ||
| ) | ||
| message = message.replace( | ||
| /^.*export '(.+?)' \(imported as '(.+?)'\) was not found in '(.+?)'.*$/gm, | ||
| `Attempted import error: '$1' is not exported from '$3' (imported as '$2').` | ||
| ) | ||
| lines = message.split('\n') | ||
|
|
||
| // Remove leading newline | ||
| if (lines.length > 2 && lines[1].trim() === '') { | ||
| lines.splice(1, 1) | ||
| } | ||
| // Clean up file name | ||
| lines[0] = lines[0].replace(/^(.*) \d+:\d+-\d+$/, '$1') | ||
|
|
||
| // Cleans up verbose "module not found" messages for files and packages. | ||
| if (lines[1] && lines[1].indexOf('Module not found: ') === 0) { | ||
| lines = [ | ||
| lines[0], | ||
| lines[1] | ||
| .replace('Error: ', '') | ||
| .replace('Module not found: Cannot find file:', 'Cannot find file:') | ||
| ] | ||
| } | ||
|
|
||
| // Add helpful message for users trying to use Sass for the first time | ||
| if (lines[1] && lines[1].match(/Cannot find module.+sass/)) { | ||
| lines[1] = 'To import Sass files, you first need to install sass.\n' | ||
| lines[1] += | ||
| 'Run `npm install sass` or `yarn add sass` inside your workspace.' | ||
| } | ||
|
|
||
| message = lines.join('\n') | ||
| // Internal stacks are generally useless so we strip them... with the | ||
| // exception of stacks containing `webpack:` because they're normally | ||
| // from user code generated by webpack. For more information see | ||
| // https://github.com/facebook/create-react-app/pull/1050 | ||
| message = message.replace( | ||
| /^\s*at\s((?!webpack:).)*:\d+:\d+[\s)]*(\n|$)/gm, | ||
| '' | ||
| ) // at ... ...:x:y | ||
| message = message.replace(/^\s*at\s<anonymous>(\n|$)/gm, '') // at <anonymous> | ||
| lines = message.split('\n') | ||
|
|
||
| // Remove duplicated newlines | ||
| lines = lines.filter( | ||
| (line, index, arr) => | ||
| index === 0 || line.trim() !== '' || line.trim() !== arr[index - 1].trim() | ||
| ) | ||
|
|
||
| // Reassemble the message | ||
| message = lines.join('\n') | ||
| return message.trim() | ||
| } | ||
|
|
||
| function formatWebpackMessages(json) { | ||
| const formattedErrors = json.errors.map(formatMessage) | ||
| const formattedWarnings = json.warnings.map(formatMessage) | ||
| const result = { errors: formattedErrors, warnings: formattedWarnings } | ||
| if (result.errors.some(isLikelyASyntaxError)) { | ||
| // If there are any syntax errors, show just them. | ||
| result.errors = result.errors.filter(isLikelyASyntaxError) | ||
| } | ||
| return result | ||
| } | ||
|
|
||
| module.exports = formatWebpackMessages |
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