forked from lix-project/lix-website
148 lines
2.8 KiB
JavaScript
148 lines
2.8 KiB
JavaScript
'use strict';
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const fs = require('fs');
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const path = require('path');
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const types = require('./types');
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// https://github.com/npm/npm/blob/latest/lib/config/core.js#L409-L423
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const envReplace = str => {
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if (typeof str !== 'string' || !str) {
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return str;
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}
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// Replace any ${ENV} values with the appropriate environment
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const regex = /(\\*)\$\{([^}]+)\}/g;
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return str.replace(regex, (orig, esc, name) => {
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esc = esc.length > 0 && esc.length % 2;
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if (esc) {
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return orig;
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}
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if (process.env[name] === undefined) {
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throw new Error(`Failed to replace env in config: ${orig}`);
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}
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return process.env[name];
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});
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};
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// https://github.com/npm/npm/blob/latest/lib/config/core.js#L362-L407
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const parseField = (field, key) => {
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if (typeof field !== 'string') {
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return field;
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}
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const typeList = [].concat(types[key]);
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const isPath = typeList.indexOf(path) !== -1;
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const isBool = typeList.indexOf(Boolean) !== -1;
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const isString = typeList.indexOf(String) !== -1;
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const isNumber = typeList.indexOf(Number) !== -1;
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field = `${field}`.trim();
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if (/^".*"$/.test(field)) {
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try {
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field = JSON.parse(field);
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} catch (err) {
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throw new Error(`Failed parsing JSON config key ${key}: ${field}`);
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}
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}
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if (isBool && !isString && field === '') {
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return true;
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}
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switch (field) { // eslint-disable-line default-case
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case 'true': {
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return true;
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}
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case 'false': {
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return false;
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}
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case 'null': {
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return null;
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}
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case 'undefined': {
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return undefined;
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}
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}
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field = envReplace(field);
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if (isPath) {
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const regex = process.platform === 'win32' ? /^~(\/|\\)/ : /^~\//;
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if (regex.test(field) && process.env.HOME) {
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field = path.resolve(process.env.HOME, field.substr(2));
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}
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field = path.resolve(field);
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}
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if (isNumber && !field.isNan()) {
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field = Number(field);
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}
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return field;
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};
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// https://github.com/npm/npm/blob/latest/lib/config/find-prefix.js
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const findPrefix = name => {
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name = path.resolve(name);
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let walkedUp = false;
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while (path.basename(name) === 'node_modules') {
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name = path.dirname(name);
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walkedUp = true;
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}
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if (walkedUp) {
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return name;
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}
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const find = (name, original) => {
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const regex = /^[a-zA-Z]:(\\|\/)?$/;
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if (name === '/' || (process.platform === 'win32' && regex.test(name))) {
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return original;
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}
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try {
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const files = fs.readdirSync(name);
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if (files.indexOf('node_modules') !== -1 || files.indexOf('package.json') !== -1) {
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return name;
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}
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const dirname = path.dirname(name);
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if (dirname === name) {
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return original;
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}
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return find(dirname, original);
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} catch (err) {
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if (name === original) {
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if (err.code === 'ENOENT') {
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return original;
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}
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throw err;
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}
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return original;
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}
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};
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return find(name, name);
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};
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exports.envReplace = envReplace;
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exports.findPrefix = findPrefix;
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exports.parseField = parseField;
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