106 lines
2.1 KiB
JavaScript
106 lines
2.1 KiB
JavaScript
'use strict';
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var fs = require('fs');
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var SPLIT = /(\/\/\s*#(?:(?!\/\/\s*#).)*)/g;
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module.exports = {
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splitlines: splitlines,
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read: read,
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write: write,
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evaluate: evaluate
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/**
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* @param {string} data
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* @return {string[]}
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*/
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};function splitlines(data) {
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return data.split(/(?:\r\n|\r|\n)/g).reduce(function (a, line) {
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var l = line.split(SPLIT).filter(Boolean);
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if (l.length > 1) {
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l.map(function (line) {
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return a.push(line);
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});
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} else {
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a.push(line);
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}
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return a;
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}, []);
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}
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/**
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* @param {path} file
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* @return {Promise}
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*/
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function read(file) {
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var data = '';
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var stream = void 0;
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if (!file) {
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stream = process.stdin;
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stream.setEncoding('utf8');
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} else {
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stream = fs.createReadStream(file, 'utf8');
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}
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return new Promise(function (resolve, reject) {
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stream.on('data', function (_data) {
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data += _data;
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});
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stream.on('end', function () {
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resolve(data);
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});
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stream.on('error', function (err) {
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reject(err);
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});
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});
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}
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/**
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* @param {path} file
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* @param {string} data
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* @return {Promise}
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*/
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function write(file, data) {
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return new Promise(function (resolve, reject) {
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if (!file) {
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console.log(data);
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resolve();
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} else {
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if (typeof data !== 'string') {
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data = JSON.stringify(data);
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}
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fs.writeFile(file, data, function (err) {
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if (err) {
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reject(err);
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} else {
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resolve();
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}
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});
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}
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});
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}
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/**
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* @param {object} defines
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* @return {function} `function (code)` where {string} code to evaluate
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*/
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function evaluate(defines) {
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var src = 'function defined (i) { return (typeof i !== "undefined") };\n';
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Object.keys(defines).forEach(function (key) {
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src += 'var ' + key + ' = ' + defines[key] + ';\n';
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});
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return function (code) {
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var _src = src + 'return ' + code + ';\n';
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try {
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return new Function(_src)(); // eslint-disable-line no-new-func
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} catch (e) {
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if (e.name === 'ReferenceError') {
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return false;
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} else {
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throw e;
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}
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}
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};
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} |