| 1 | import * as vm from 'vm';
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| 2 | import * as fs from 'fs';
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| 3 | import * as _ from 'lodash';
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| 4 | import {SystemConfig} from './models';
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| 5 |
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| 6 | export function readConfig(cfgCode: string[]) {
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| 7 | let cfg: any = {};
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| 8 | let configFunc = (systemCfg: any) => {
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| 9 | _.merge(cfg, systemCfg);
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| 10 | };
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| 11 |
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| 12 | let sandbox = {
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| 13 | System: {
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| 14 | config: configFunc
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| 15 | },
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| 16 | SystemJS: {
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| 17 | config: configFunc
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| 18 | }
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| 19 | };
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| 20 | vm.createContext(sandbox);
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| 21 | cfgCode.forEach(c => {
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| 22 | vm.runInContext(c, sandbox);
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| 23 | });
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| 24 |
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| 25 | return cfg as SystemConfig;
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| 26 | }
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| 27 |
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| 28 | export function isSystemJS(cfgCode: string) {
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| 29 | let res = false;
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| 30 | let sandbox = {
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| 31 | SystemJS: {
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| 32 | config: () => {
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| 33 | res = true;
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| 34 | }
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| 35 | },
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| 36 | System: {
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| 37 | config: () => {
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| 38 | res = false;
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| 39 | }
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| 40 | }
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| 41 | };
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| 42 | vm.createContext(sandbox);
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| 43 | vm.runInContext(cfgCode, sandbox);
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| 44 | return res;
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| 45 | }
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| 46 |
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| 47 | export function isSystem(cfgCode: string) {
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| 48 | let res = false;
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| 49 | let sandbox = {
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| 50 | System: {
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| 51 | config: () => {
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| 52 | res = true;
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| 53 | }
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| 54 | },
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| 55 | SystemJS: {
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| 56 | config: () => {
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| 57 | res = false;
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| 58 | }
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| 59 | }
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| 60 | };
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| 61 | vm.createContext(sandbox);
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| 62 | vm.runInContext(cfgCode, sandbox);
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| 63 |
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| 64 | return res;
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| 65 | }
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| 66 |
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| 67 | export function serializeConfig(config: SystemConfig, isSystemJS: boolean = false) {
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| 68 | let tab = ' ';
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| 69 | let json = JSON.stringify(config, null, 2)
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| 70 | .replace(new RegExp('^' + tab + '"(\\w+)"', 'mg'), tab + '$1');
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| 71 |
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| 72 | if (isSystemJS) {
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| 73 | return `SystemJS.config(${json});`;
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| 74 | }
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| 75 | return `System.config(${json});`;
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| 76 | }
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| 77 |
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| 78 | export function getAppConfig(configPath: string | string[]) {
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| 79 | let configCode: string[] = [];
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| 80 |
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| 81 | if (typeof configPath === 'string') {
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| 82 | configCode.push(fs.readFileSync(configPath, 'utf8'));
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| 83 | }
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| 84 |
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| 85 | if (Array.isArray(configPath)) {
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| 86 | configPath.forEach(cp => {
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| 87 | configCode.push(fs.readFileSync(cp, 'utf8'));
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| 88 | });
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| 89 | }
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| 90 |
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| 91 | let appCfg = readConfig(configCode);
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| 92 |
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| 93 | if (!appCfg.map) {
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| 94 | appCfg.map = {};
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| 95 | }
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| 96 | return appCfg;
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| 97 | }
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| 98 |
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| 99 | export function saveAppConfig(configPath: string, config: SystemConfig) {
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| 100 | fs.writeFileSync(configPath, serializeConfig(config, isSystemJS(fs.readFileSync(configPath, 'utf8'))));
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| 101 | }
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