Files F122541183

utils.js
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Created: Fri, Jul 18, 12:45

utils.js
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	'use strict';

	const path = require('path');
	const win32 = process.platform === 'win32';
	const {
	REGEX_BACKSLASH,
	REGEX_REMOVE_BACKSLASH,
	REGEX_SPECIAL_CHARS,
	REGEX_SPECIAL_CHARS_GLOBAL
	} = require('./constants');

	exports.isObject = val => val !== null && typeof val === 'object' && !Array.isArray(val);
	exports.hasRegexChars = str => REGEX_SPECIAL_CHARS.test(str);
	exports.isRegexChar = str => str.length === 1 && exports.hasRegexChars(str);
	exports.escapeRegex = str => str.replace(REGEX_SPECIAL_CHARS_GLOBAL, '\\$1');
	exports.toPosixSlashes = str => str.replace(REGEX_BACKSLASH, '/');

	exports.removeBackslashes = str => {
	return str.replace(REGEX_REMOVE_BACKSLASH, match => {
	return match === '\\' ? '' : match;
	});
	};

	exports.supportsLookbehinds = () => {
	const segs = process.version.slice(1).split('.').map(Number);
	if (segs.length === 3 && segs[0] >= 9 \|\| (segs[0] === 8 && segs[1] >= 10)) {
	return true;
	}
	return false;
	};

	exports.isWindows = options => {
	if (options && typeof options.windows === 'boolean') {
	return options.windows;
	}
	return win32 === true \|\| path.sep === '\\';
	};

	exports.escapeLast = (input, char, lastIdx) => {
	const idx = input.lastIndexOf(char, lastIdx);
	if (idx === -1) return input;
	if (input[idx - 1] === '\\') return exports.escapeLast(input, char, idx - 1);
	return `${input.slice(0, idx)}\\${input.slice(idx)}`;
	};

	exports.removePrefix = (input, state = {}) => {
	let output = input;
	if (output.startsWith('./')) {
	output = output.slice(2);
	state.prefix = './';
	}
	return output;
	};

	exports.wrapOutput = (input, state = {}, options = {}) => {
	const prepend = options.contains ? '' : '^';
	const append = options.contains ? '' : '$';

	let output = `${prepend}(?:${input})${append}`;
	if (state.negated === true) {
	output = `(?:^(?!${output}).*$)`;
	}
	return output;
	};

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