angular-cn/aio/tools/stackblitz-builder/builder.js

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'use strict';
// Canonical path provides a consistent path (i.e. always forward slashes) across different OSes
const path = require('canonical-path');
const fs = require('fs-extra');
const globby = require('globby');
const jsdom = require('jsdom');
const regionExtractor = require('../transforms/examples-package/services/region-parser');
class StackblitzBuilder {
constructor(basePath, destPath) {
this.basePath = basePath;
this.destPath = destPath;
this.copyrights = this._buildCopyrightStrings();
this._boilerplatePackageJsons = {};
}
build() {
this._checkForOutdatedConfig();
// When testing it sometimes helps to look a just one example directory like so:
// const stackblitzPaths = path.join(this.basePath, '**/testing/*stackblitz.json');
const stackblitzPaths = path.join(this.basePath, '**/*stackblitz.json');
const fileNames = globby.sync(stackblitzPaths, { ignore: ['**/node_modules/**'] });
fileNames.forEach((configFileName) => {
try {
// console.log('***'+configFileName)
this._buildStackblitzFrom(configFileName);
} catch (e) {
console.log(e);
}
});
}
_addDependencies(config, postData) {
// Extract npm package dependencies
const exampleType = this._getExampleType(config.basePath);
const packageJson = this._getBoilerplatePackageJson(exampleType) || this._getBoilerplatePackageJson('cli');
const exampleDependencies = packageJson.dependencies;
// Add unit test packages from devDependencies for unit test examples
const devDependencies = packageJson.devDependencies;
['jasmine-core', 'jasmine-marbles'].forEach(dep => exampleDependencies[dep] = devDependencies[dep]);
postData.dependencies = JSON.stringify(exampleDependencies);
}
_getExampleType(exampleDir) {
const configPath = `${exampleDir}/example-config.json`;
const configSrc = fs.existsSync(configPath) && fs.readFileSync(configPath, 'utf-8').trim();
const config = configSrc ? JSON.parse(configSrc) : {};
return config.projectType || 'cli';
}
_getBoilerplatePackageJson(exampleType) {
if (!this._boilerplatePackageJsons.hasOwnProperty(exampleType)) {
const pkgJsonPath = `${__dirname}/../examples/shared/boilerplate/${exampleType}/package.json`;
this._boilerplatePackageJsons[exampleType] = fs.existsSync(pkgJsonPath) ? require(pkgJsonPath) : null;
}
return this._boilerplatePackageJsons[exampleType];
}
_buildCopyrightStrings() {
const copyright = 'Copyright Google LLC. All Rights Reserved.\n' +
'Use of this source code is governed by an MIT-style license that\n' +
'can be found in the LICENSE file at http://angular.io/license';
const pad = '\n\n';
return {
jsCss: `${pad}/*\n${copyright}\n*/`,
html: `${pad}<!-- \n${copyright}\n-->`,
};
}
// Build stackblitz from JSON configuration file (e.g., stackblitz.json):
// all properties are optional
// files: string[] - array of globs - defaults to all js, ts, html, json, css and md files (with certain files removed)
// description: string - description of this stackblitz - defaults to the title in the index.html page.
// tags: string[] - optional array of stackblitz tags (for searchability)
// main: string - name of file that will become index.html in the stackblitz - defaults to index.html
// file: string - name of file to display within the stackblitz (e.g. `"file": "app/app.module.ts"`)
_buildStackblitzFrom(configFileName) {
// replace ending 'stackblitz.json' with 'stackblitz.no-link.html' to create output file name;
const outputFileName = configFileName.replace(/stackblitz\.json$/, 'stackblitz.no-link.html');
let altFileName;
if (this.destPath && this.destPath.length > 0) {
const partPath = path.dirname(path.relative(this.basePath, outputFileName));
altFileName = path.join(this.destPath, partPath, path.basename(outputFileName)).replace('.no-link.', '.');
}
try {
const config = this._initConfigAndCollectFileNames(configFileName);
const postData = this._createPostData(config, configFileName);
this._addDependencies(config, postData);
const html = this._createStackblitzHtml(config, postData);
fs.writeFileSync(outputFileName, html, 'utf-8');
if (altFileName) {
const altDirName = path.dirname(altFileName);
fs.ensureDirSync(altDirName);
fs.writeFileSync(altFileName, html, 'utf-8');
}
} catch (e) {
// if we fail delete the outputFile if it exists because it is an old one.
if (fs.existsSync(outputFileName)) {
fs.unlinkSync(outputFileName);
}
if (altFileName && fs.existsSync(altFileName)) {
fs.unlinkSync(altFileName);
}
throw e;
}
}
_checkForOutdatedConfig() {
// Ensure that nobody is trying to use the old config filenames (i.e. `plnkr.json`).
const plunkerPaths = path.join(this.basePath, '**/*plnkr.json');
const fileNames = globby.sync(plunkerPaths, { ignore: ['**/node_modules/**'] });
if (fileNames.length) {
const readmePath = path.join(__dirname, 'README.md');
const errorMessage =
'One or more examples are still trying to use \'plnkr.json\' files for configuring ' +
'live examples. This is not supported any more. \'stackblitz.json\' should be used ' +
'instead.\n' +
`(Slight modifications may be required. See '${readmePath}' for more info.\n\n` +
fileNames.map(name => `- ${name}`).join('\n');
throw Error(errorMessage);
}
}
_getPrimaryFile(config) {
if (config.file) {
if (!fs.existsSync(path.join(config.basePath, config.file))) {
throw new Error(`The specified primary file (${config.file}) does not exist in '${config.basePath}'.`);
}
return config.file;
} else {
const defaultPrimaryFiles = ['src/app/app.component.html', 'src/app/app.component.ts', 'src/app/main.ts'];
const primaryFile = defaultPrimaryFiles.find(fileName => fs.existsSync(path.join(config.basePath, fileName)));
if (!primaryFile) {
throw new Error(`None of the default primary files (${defaultPrimaryFiles.join(', ')}) exists in '${config.basePath}'.`);
}
return primaryFile;
}
}
_createBaseStackblitzHtml(config) {
const file = `?file=${this._getPrimaryFile(config)}`;
const action = `https://run.stackblitz.com/api/angular/v1${file}`;
return `
<!DOCTYPE html><html lang="en"><body>
<form id="mainForm" method="post" action="${action}" target="_self"></form>
<script>
var embedded = 'ctl=1';
var isEmbedded = window.location.search.indexOf(embedded) > -1;
if (isEmbedded) {
var form = document.getElementById('mainForm');
var action = form.action;
var actionHasParams = action.indexOf('?') > -1;
var symbol = actionHasParams ? '&' : '?'
form.action = form.action + symbol + embedded;
}
document.getElementById("mainForm").submit();
</script>
</body></html>
`.trim();
}
_createPostData(config, configFileName) {
const postData = {};
// If `config.main` is specified, ensure that it points to an existing file.
if (config.main && !fs.existsSync(path.join(config.basePath, config.main))) {
throw Error(`The main file ('${config.main}') specified in '${configFileName}' does not exist.`);
}
config.fileNames.forEach((fileName) => {
let content;
const extn = path.extname(fileName);
if (extn === '.png') {
content = this._encodeBase64(fileName);
fileName = `${fileName.slice(0, -extn.length)}.base64${extn}`;
} else {
content = fs.readFileSync(fileName, 'utf-8');
}
if (extn === '.js' || extn === '.ts' || extn === '.css') {
content = content + this.copyrights.jsCss;
} else if (extn === '.html') {
content = content + this.copyrights.html;
}
// const escapedValue = escapeHtml(content);
let relativeFileName = path.relative(config.basePath, fileName);
// Is the main a custom index-xxx.html file? Rename it
if (relativeFileName === config.main) {
relativeFileName = 'src/index.html';
}
// A custom main.ts file? Rename it
if (/src\/main[-.]\w+\.ts$/.test(relativeFileName)) {
relativeFileName = 'src/main.ts';
}
if (relativeFileName === 'index.html') {
if (config.description == null) {
// set config.description to title from index.html
const matches = /<title>(.*)<\/title>/.exec(content);
if (matches) {
config.description = matches[1];
}
}
}
content = regionExtractor()(content, extn.substr(1)).contents;
postData[`files[${relativeFileName}]`] = content;
});
const tags = ['angular', 'example', ...config.tags || []];
tags.forEach((tag, ix) => postData[`tags[${ix}]`] = tag);
postData.description = `Angular Example - ${config.description}`;
return postData;
}
_createStackblitzHtml(config, postData) {
const baseHtml = this._createBaseStackblitzHtml(config);
const doc = jsdom.jsdom(baseHtml);
const form = doc.querySelector('form');
for(const [key, value] of Object.entries(postData)) {
const ele = this._htmlToElement(doc, `<input type="hidden" name="${key}">`);
ele.setAttribute('value', value);
form.appendChild(ele);
}
return doc.documentElement.outerHTML;
}
_encodeBase64(file) {
// read binary data
return fs.readFileSync(file, { encoding: 'base64' });
}
_htmlToElement(document, html) {
const div = document.createElement('div');
div.innerHTML = html;
return div.firstChild;
}
_initConfigAndCollectFileNames(configFileName) {
const config = this._parseConfig(configFileName);
const defaultIncludes = ['**/*.ts', '**/*.js', '**/*.css', '**/*.html', '**/*.md', '**/*.json', '**/*.png', '**/*.svg'];
const boilerplateIncludes = ['src/environments/*.*', 'angular.json', 'src/polyfills.ts'];
if (config.files) {
if (config.files.length > 0) {
if (config.files[0][0] === '!') {
config.files = defaultIncludes.concat(config.files);
}
}
} else {
config.files = defaultIncludes;
}
config.files = config.files.concat(boilerplateIncludes);
let includeSpec = false;
const gpaths = config.files.map((fileName) => {
fileName = fileName.trim();
if (fileName[0] === '!') {
return '!' + path.join(config.basePath, fileName.substr(1));
} else {
includeSpec = includeSpec || /\.spec\.(ts|js)$/.test(fileName);
return path.join(config.basePath, fileName);
}
});
const defaultExcludes = [
'!**/e2e/**/*.*',
'!**/tsconfig.json',
'!**/package.json',
'!**/example-config.json',
'!**/tslint.json',
'!**/.editorconfig',
'!**/wallaby.js',
'!**/karma-test-shim.js',
'!**/karma.conf.js',
'!**/test.ts',
'!**/tsconfig.app.json',
'!**/*stackblitz.*'
];
// exclude all specs if no spec is mentioned in `files[]`
if (!includeSpec) {
defaultExcludes.push('!**/*.spec.*','!**/spec.js');
}
gpaths.push(...defaultExcludes);
config.fileNames = globby.sync(gpaths, { ignore: ['**/node_modules/**'] });
return config;
}
_parseConfig(configFileName) {
try {
const configSrc = fs.readFileSync(configFileName, 'utf-8');
const config = (configSrc && configSrc.trim().length) ? JSON.parse(configSrc) : {};
config.basePath = path.dirname(configFileName); // assumes 'stackblitz.json' is at `/src` level.
return config;
} catch (e) {
throw new Error(`Stackblitz config - unable to parse json file: ${configFileName}\n${e}`);
}
}
}
module.exports = StackblitzBuilder;