ce4c83ff
 wxy
初始提交
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'use strict';
function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } else { return Array.from(arr); } }
var os = require('os');
/**
* Tries to get an excerpt of the file where the error happened.
* Uses err.line and err.column.
*
* Returns an empty string if the excerpt could not be retrieved.
*
* @param {LessError} err
* @returns {Array<string>}
*/
function getFileExcerptIfPossible(lessErr) {
try {
var excerpt = lessErr.extract.slice(0, 2);
var column = Math.max(lessErr.column - 1, 0);
if (typeof excerpt[0] === 'undefined') {
excerpt.shift();
}
excerpt.push(`${new Array(column).join(' ')}^`);
return excerpt;
} catch (unexpectedErr) {
// If anything goes wrong here, we don't want any errors to be reported to the user
return [];
}
}
/**
* Beautifies the error message from Less.
*
* @param {LessError} lessErr
* @param {string} lessErr.type - e.g. 'Name'
* @param {string} lessErr.message - e.g. '.undefined-mixin is undefined'
* @param {string} lessErr.filename - e.g. '/path/to/style.less'
* @param {number} lessErr.index - e.g. 352
* @param {number} lessErr.line - e.g. 31
* @param {number} lessErr.callLine - e.g. NaN
* @param {string} lessErr.callExtract - e.g. undefined
* @param {number} lessErr.column - e.g. 6
* @param {Array<string>} lessErr.extract - e.g. [' .my-style {', ' .undefined-mixin;', ' display: block;']
* @returns {LessError}
*/
function formatLessError(err) {
/* eslint-disable no-param-reassign */
var msg = err.message;
// Instruct webpack to hide the JS stack from the console
// Usually you're only interested in the SASS stack in this case.
err.hideStack = true;
err.message = [os.EOL].concat(_toConsumableArray(getFileExcerptIfPossible(err)), [msg.charAt(0).toUpperCase() + msg.slice(1), ` in ${err.filename} (line ${err.line}, column ${err.column})`]).join(os.EOL);
return err;
} /* eslint-enable no-param-reassign */
module.exports = formatLessError;
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